---
oa_review_kit: v1
guide_slug: mi-pension-retirement-subtraction
guide_version: mi-pension-retirement-subtraction@2026-05-28T14:33:50.054Z
archetype: other
---

# Review kit: MI Pension Retirement Subtraction

Thank you for reviewing this Guide. This kit is one file with three parts: how
to use it, an interview prompt for your AI, and the Guide itself.

## How to use this kit (3 steps, about 15 minutes)

1. Open the AI you already use (ChatGPT, Claude, Gemini, anything that reads
   markdown) and paste in everything from "INTERVIEW PROMPT" below, including
   the Guide at the end.
2. Your AI interviews you like a colleague, one question at a time. Just talk:
   war stories, walk-throughs, the mistakes you catch. No writing required.
3. Your AI writes your answers up as a single markdown file. Hand it back at
   openaccountants.com/skills/mi-pension-retirement-subtraction/handback (also linked from the Guide
   page: "Hand back your file"). What you added is published under your name
   and credential.

If your AI cannot produce the exact output format, hand back whatever you have:
a revised Guide file, a worksheet, or plain notes. We take those too, and a
person reviews them by hand. The format below is the one we can apply straight
away.

---

# INTERVIEW PROMPT (paste from here down into your AI)

You are interviewing a practising accountant about how they actually do the
work covered by the attached Guide ("MI Pension Retirement Subtraction", slug `mi-pension-retirement-subtraction`).
Interview them like a colleague doing a handover. Do not lecture. Ask ONE
question at a time and wait for the answer. Chase war stories and specifics:
what kind of client, which portal step, how big the penalty was.

The rates, thresholds, and citations are our job; we refresh those from primary
sources. Capture ONLY what is NOT derivable from law:

- order of operations, and what a wrong order corrupts
- what to ask a client before computing anything
- what to assume when a fact is unknown, and how it gets flagged
- the most-missed traps, with penalty size and who falls in
- how the portal or filing channel actually behaves
- what has to reconcile before anyone signs
- when to refuse the work and hand it to a human specialist

If the accountant corrects a rate, threshold, or deadline in the Guide along
the way, record it in the FACT CORRECTIONS table, but do not steer the
interview toward numbers.

## Questions to work through

Ask these in order, one at a time. Skip any the accountant has already covered;
follow up where a story has specifics worth pinning down. Each question is
tagged with the method slot(s) it feeds.

1. [sequence] Walk me through the last one of these you did for a real client, start to finish. What did you open first, and why that order?
2. [intake_questions] A new client sits down for this work. What are your first five questions before you touch a number?
3. [evidence] Which documents do you insist on seeing, and which do you take the client's word for?
4. [trap] When you review this work drafted by someone else, what mistake do you catch most often?
5. [conservative_default] When a key fact is unknowable at draft time, what do you assume, and how do you flag it?
6. [judgment_rule] When the law allows two routes, how do you actually pick, and what do you write down about the choice?
7. [cross_check] Before you sign, what has to reconcile with what, and how close is close enough?
8. [filing_mechanics] Walk me through the actual submission: the portal steps, the order things must happen in, what locks, what you can't undo.
9. [scope_gate] Which clients do you refuse or refer to a specialist for this work? What makes you stop?
10. [unsettled_law] Anything here you deliberately won't finalise right now because the rules are moving?
11. [handback_protocol] What exactly do you hand over at the end? What's in your working paper?

## Method slots (for tagging the write-up)

- `scope_gate` (Scope gate and refusals): when to stop and send the client to a human
- `sequence` (Order of operations): what order to do things in, and what a wrong order corrupts
- `intake_questions` (Client intake questions): what to ask a client before computing
- `evidence` (Documents and evidence): which documents to insist on, and what is draft-grade vs file-grade
- `judgment_rule` (Judgment rules): how a practitioner actually picks when the law allows two routes
- `conservative_default` (Conservative defaults): what to assume when a fact is unknowable at draft time
- `trap` (Traps and most-missed items): the mistakes everyone makes, what they cost, and who falls in
- `filing_mechanics` (Portal and filing mechanics): how submission actually works: channel, order, what locks
- `cross_check` (Cross-checks before signing): what has to reconcile with what before delivery, and how close is close enough
- `pattern_library` (Pattern library): how messy real-world data (bank lines, payout platforms) maps to tax categories
- `edge_case` (Edge-case playbook): the client situations that change the method, not just the numbers
- `unsettled_law` (Unsettled-law flags): what not to finalise right now, and why
- `handback_protocol` (Hand-back protocol): what the finished working paper contains and who reviews it

## Output format: oa-handback v1

When the interview is done, write the answers up as ONE markdown file in
exactly this shape. Fill in the reviewer's real name, credential, and email
(ask for them at the end if they have not come up). Every method block gets a
`### [method:<slot>]` heading where `<slot>` is one of the 13 slot ids
above. Keep `guide_slug` and `guide_version` exactly as given. Omit any
section the interview produced nothing for, but keep the headings that remain
exactly as shown. The `fact_key` column may be left blank when unknown.

```markdown
---
oa_handback: v1
guide_slug: mi-pension-retirement-subtraction
guide_version: mi-pension-retirement-subtraction@2026-05-28T14:33:50.054Z
reviewer_name: <full name>
reviewer_credential: <credential>        # free text: CPA, EA, ACCA, Steuerberater...
reviewer_email: <email>
verdict: <approve | corrections | unable>
---

## METHOD

### [method:filing_mechanics] <short title for this block>
<prose: the method block, written in second person, imperative>

### [method:intake_questions] <short title for this block>
- <question 1>
- ...

## FACT CORRECTIONS
| fact_key | current | correct | source |
|---|---|---|---|
| <fact key if known, else blank> | <value in the Guide> | <correct value> | <cite> |

## FLAGS
- [unsettled] <what not to finalise, and why>
- [refer] <situations to escalate to a human>

## NOTES
<anything that did not fit a method slot or a fact correction>
```

If for any reason you cannot produce this exact format, output the accountant's
corrections and methods as clear plain notes instead. The hand-back page
accepts plain notes and revised Guide files too; this format is an
optimization, never a gate.

---

# THE GUIDE UNDER REVIEW

<!-- guide: mi-pension-retirement-subtraction · version: mi-pension-retirement-subtraction@2026-05-28T14:33:50.054Z -->

---
name: mi-pension-retirement-subtraction
description: Use this skill whenever asked about Michigan's pension/retirement income subtraction on Form MI-1040, the Form 4884 "Michigan Pension Schedule", the Lowering MI Costs Plan / Public Act 4 of 2023 phase-in, the three birth-year tiers (pre-1946 / 1946-1952 / 1953+), the all-income age 67+ Michigan Standard Deduction ($20,000 single / $40,000 MFJ), or how retired public-safety officers elect their subtraction. Trigger on phrases like "Michigan pension subtraction", "Form 4884", "MI retirement tax", "PA 4 of 2023", "Lowering MI Costs Plan", "pension tax repeal", "retirement subtraction tier", "Michigan Standard Deduction age 67", or "Section A/B/C/D of Form 4884". Federal Social Security, railroad retirement, military retirement, and Michigan National Guard retirement are addressed in passing because they interact with the Form 4884 caps, but are reported on Schedule 1 line 11 (not on Form 4884) and are fully exempt from Michigan tax regardless of tier.
jurisdiction: US-MI
tax_year: 2025
---

# mi-pension-retirement-subtraction

## Michigan Pension and Retirement Income Subtraction

Michigan Pension and Retirement Income Subtraction

## Scope and Quality tier callout

**Scope.** This skill covers the Michigan retirement and pension benefits subtraction taken on Schedule 1 (Form MI-1040), line 27, supported by Form 4884 ("Michigan Pension Schedule") and its companion worksheets, for full-year Michigan resident individuals. It covers the three birth-year tiers established by Public Act 38 of 2011 ("Snyder pension tax"), the four-year phase-in restoration of the pre-2012 subtraction enacted by Public Act 4 of 2023 ("Lowering MI Costs Plan"), and the limited Tier 3 Social-Security-offset relief added by Public Act 24 of 2025. It also covers the all-income Michigan Standard Deduction available at age 67 and the unlimited public-retirement-benefits election for retired qualified Fire, Police and County Corrections officers under MCL 206.30(11). Tax years 2025 and 2026 are the focus, with side-by-side figures for tax years 2023, 2024, 2025, and 2026.

**Quality tier.** Q3 — AI-drafted, not independently verified. All caps, percentages, and form line references were sourced on 2026-05-28 from the official 2025 Form 4884 instructions published by the Michigan Department of Treasury and from Revenue Administrative Bulletin 2026-1. A Michigan-licensed CPA or Enrolled Agent must review every Form 4884 before filing because the multi-section "claim the most beneficial" election is a per-taxpayer optimization, not a deterministic computation.

## Section 1: Metadata

**Metadata table**

| Field | Value |
| --- | --- |
| Jurisdiction | Michigan (US-MI) |
| Tax type | Individual income tax — retirement/pension subtraction |
| Primary form | Form 4884 (Michigan Retirement and Pension Schedule) |
| Carry-to | Schedule 1 (MI-1040), line 27 |
| Tax years covered | 2023, 2024, 2025, 2026 (focus: 2025 and 2026) |
| Authority | Michigan Department of Treasury |
| Statute | MCL 206.30 (Income Tax Act of 1967, as amended) |
| Governing acts | PA 38 of 2011; PA 4 of 2023; PA 24 of 2025 |
| Version | 0.1 |
| Last updated | 2026-05-28 |
| Validation | AI-drafted — Q3 (pending verifier signoff) |

### Sources consulted

**Sources consulted table**

| # | Source | URL |
| --- | --- | --- |
| 1 | Form 4884 — 2025 Michigan Retirement and Pension Schedule | https://www.michigan.gov/taxes/-/media/Project/Websites/taxes/Forms/IIT/TY2025/4884.pdf |
| 2 | Form 4884 — 2025 Instructions ("General Information" + Worksheets 2, 3.1, 3.2, 3.3) | https://www.michigan.gov/taxes/-/media/Project/Websites/taxes/Forms/IIT/TY2025/4884-Instr.pdf |
| 3 | Michigan Treasury — "Retirement and Pension Benefits" landing page | https://www.michigan.gov/taxes/iit/retirement |
| 4 | Michigan Treasury — "2025 Tier III" guidance | https://www.michigan.gov/taxes/iit/tax-guidance/tax-situations/retirement-and-pension-benefits/2025/2025-tier-iii |
| 5 | Michigan Treasury — Fire, Police and Correction Officer Retirees guidance | https://www.michigan.gov/taxes/iit/tax-guidance/tax-situations/retirement-and-pension-benefits/2023/safety-officers |
| 6 | Revenue Administrative Bulletin 2023-22 — Treatment of Retirement Income Under PA 4 of 2023 | https://www.michigan.gov/taxes/-/media/Project/Websites/taxes/RAB/RAB-2023-22.pdf |
| 7 | Revenue Administrative Bulletin 2026-1 — Standard Deduction and Retirement Treatment | https://www.michigan.gov/taxes/rep-legal/rab/2026-revenue-administrative-bulletins/revenue-administrative-bulletin-2026-1 |
| 8 | MCL 206.30 — Subtractions (text) | https://www.legislature.mi.gov/Laws/MCL?objectName=MCL-206-30 |
| 9 | Public Act 4 of 2023 — Lowering MI Costs Plan | https://legislature.mi.gov/documents/2023-2024/publicact/htm/2023-PA-0004.htm |
| 10 | Public Act 24 of 2025 — Social Security offset fix for Tier 3 | https://legislature.mi.gov/documents/2025-2026/publicact/htm/2025-PA-0024.htm |
| 11 | Michigan ORS — FAQs for PA 4 of 2023 | https://www.michigan.gov/orsmsp/public-act-4-of-2023-faqs |
| 12 | Michigan House Fiscal Agency — Three-Tiered Treatment of Retirement Income (March 2023 snapshot) | https://www.house.mi.gov/hfa/PDF/FiscalSnapshot/Tax_Three_Tiered_Treatment_of_Retirement_Income_Mar2023.pdf |
| 13 | MERS of Michigan — Changes to Michigan Tax on Retirement and Pension Benefits | https://www.mersofmich.com/retiree/resources/changes-to-michigan-tax-on-retirement-and-pension-benefits/ |

## Section 2: Quick reference — the three tiers and the PA 4 phase-in

### 2.1 The three legacy tiers (post-PA 38 of 2011)

- **Legacy tier system overview** — Public Act 38 of 2011 ("Snyder pension tax") replaced Michigan's pre-2012 unlimited public-pension subtraction with a three-tiered system that conditions the subtraction on the older of taxpayer or spouse's year of birth (the "key person" for joint filers). The tier boundaries are codified at MCL 206.30(1)(f), (9), and (10) and have not moved with PA 4 of 2023 — what PA 4 of 2023 changed is what each tier may claim, not the birth-year boundaries.  _(MCL 206.30(1)(f), (9), (10))_

**Three tiers table**

| Tier | Birth year of older spouse | Legacy (pre-PA 4) rule |
| --- | --- | --- |
| Tier 1 | Born **before** 1946 | Full subtraction of all public retirement benefits; private retirement benefits subtracted up to the inflation-indexed cap (the "Tier 1 cap"). |
| Tier 2 | Born **1 Jan 1946 – 31 Dec 1952** | At age 67: choose **either** the standard $20,000/$40,000 all-income deduction **or** Section B retirement subtraction under the Tier 2 caps. |
| Tier 3 | Born **1 Jan 1953 or later** | Under the legacy rule, no retirement subtraction except Social Security; at age 67, the $20,000/$40,000 all-income standard deduction (Tier 3 Michigan Standard Deduction). |

### 2.2 What PA 4 of 2023 changed

PA 4 of 2023 (the Lowering MI Costs Plan) was signed by Governor Whitmer on March 7, 2023 and took effect February 13, 2024. It did not repeal the three-tier statute; it added a parallel phased subtraction at MCL 206.30(9)(c)–(d) that progressively allows Tier 2 and Tier 3 taxpayers (and any Tier 1 taxpayer choosing it) to claim a percentage of the pre-2012 Tier 1 cap in lieu of the legacy tier-specific cap or the all-income standard deduction. The phase-in is birth-cohort gated — a taxpayer is only "in the door" for a given percentage if their birth year falls within the cohort enabled for that tax year.

### 2.3 Phase-in percentages, eligible cohorts, and dollar caps

**Phase-in table**  _(2025 Form 4884 instructions, Worksheet 3.3 line 1 ($65,897 / $131,794) and line 4; RAB 2026-1)_

| Tax year | Phase-in % | Eligible birth cohort (in addition to pre-1946) | Indexed Tier 1 base cap (single / MFJ) | Phased cap = base × % (single / MFJ) |
| --- | --- | --- | --- | --- |
| 2023 | 25% | 1946 – 1958 | $56,961 / $113,922 | $14,240 / $28,481 |
| 2024 | 50% | 1946 – 1962 | $64,040 / $128,080 | $32,020 / $64,040 |
| 2025 | 75% | 1946 – 1966 | $65,897 / $131,794 | $49,423 / $98,846 |
| 2026 | 100% | All retirees (1946+) | $67,610 / $135,220 | $67,610 / $135,220 |

**[VERIFY:** the 2026 base cap of $67,610 / $135,220 was reported in the Treasury's RAB 2026-1 summary; the published RAB PDF should be re-fetched at the time of TY-2026 filing to confirm the indexed figure before any 2026 return is signed.**]**

### 2.4 The all-income Michigan Standard Deduction at age 67+

- **Standard deduction overview** — Independent of the pension subtraction, MCL 206.30(9)(a) provides a Michigan Standard Deduction against all income (not just retirement income) for the older spouse who has reached age 67. PA 4 of 2023 did not alter the dollar value of this deduction.  _(MCL 206.30(9)(a))_

**Standard deduction table**  _(2025 Form 4884 instructions, Worksheet 2; MCL 206.30(9)(a))_

| Filing status | Michigan Standard Deduction (all-income) — 2025 & 2026 |
| --- | --- |
| Single / MFS (age 67+) | $20,000 |
| MFJ (older spouse age 67+) | $40,000 |
| Additional add-on if **either** spouse received SSA-exempt retirement (Schedule 1 box 24C) | + $15,000 |
| Additional add-on if **both** spouses received SSA-exempt retirement (boxes 24C **and** 24G) | + $30,000 |

- **PA 24 of 2025 Tier 3 SS offset relief** — For TY 2026 through TY 2028, Public Act 24 of 2025 removes the requirement that Tier 3 taxpayers reduce their $20,000/$40,000 Michigan Standard Deduction by the amount of Social Security benefits separately deducted on Schedule 1, line 14. This is a Tier-3-only fix; the offset remains in place for Tier 2.  _(Public Act 24 of 2025)_

**[VERIFY:** the precise scope of the PA 24 of 2025 offset relief — whether it also waives the offset for railroad retirement and military pay, or only Social Security — should be re-confirmed against the published RAB 2026-1 before relying on it for a Tier 3 return.**]**

### 2.5 Social Security, military, railroad — always fully exempt

- **Always-exempt categories** — Regardless of tier, regardless of phase-in year, the following are fully subtracted from Michigan AGI on Schedule 1, line 11 (not on Form 4884) and are fully exempt from Michigan income tax: Social Security benefits (taxable portion included in federal AGI); Railroad retirement benefits (Tier 1 and Tier 2 RRTA benefits); Retirement income from service in the U.S. Armed Forces; Retirement income from the Michigan National Guard. However — and this is the trap — when those amounts are also reported on Schedule 1, line 11, they reduce the cap available on Form 4884 for private retirement benefits (see Worksheets 3.1, 3.2, 3.3 line 2 / line 10). The exempt amount is "used up" against the same cap that private pension income would consume.  _(Schedule 1 line 11; Worksheets 3.1, 3.2, 3.3)_

## Section 3: The PA 4 of 2023 phase-in narrative

### 3.1 What was repealed and what wasn't

- **What was repealed and what wasn't** — PA 4 of 2023 is universally described as "repealing the Snyder pension tax," but legally it did not repeal MCL 206.30(9)–(10) — those subsections (the three-tier framework) remain in the statute. What PA 4 did was add MCL 206.30(1)(f)(ii) — a new alternative subtraction that, when fully phased in, mirrors the pre-2012 Tier 1 cap for every retiree born in or after 1946. A Tier 2 or Tier 3 taxpayer who would benefit from the old rules can still elect them; in practice, the new phased subtraction is more generous for nearly all retirees with material pension income.  _(MCL 206.30(1)(f)(ii); MCL 206.30(9)-(10))_

### 3.2 Year by year — what's available

- **Tax year 2023** — Phase-in opens at 25% of the 2023 Tier 1 indexed cap ($14,240 single / $28,481 MFJ). Eligible cohort = born 1946 through 1958. Tier 3 taxpayers born after 1958 receive nothing under the new subtraction in 2023 and remain on the legacy regime (no retirement subtraction unless age 67 reached, in which case the $20,000/$40,000 Michigan Standard Deduction applies).  _(PA 4 of 2023)_
- **Tax year 2024** — Phase-in advances to 50% ($32,020 single / $64,040 MFJ). Eligible cohort expands to 1946 through 1962.  _(PA 4 of 2023)_
- **Tax year 2025** — Phase-in advances to 75% ($49,423 single / $98,846 MFJ — Form 4884 Worksheet 3.3 line 4). Eligible cohort expands to 1946 through 1966. This is the figure on the 2025 Form 4884.  _(Form 4884 Worksheet 3.3 line 4)_
- **Tax year 2026** — Phase-in reaches 100% — the full Tier 1 cap of $67,610 single / $135,220 MFJ is available to every retiree born in or after 1946, regardless of cohort. The phase-in is complete. From 2026 onward, the only meaningful birth-year distinction remaining is the unlimited public-pension subtraction reserved to Tier 1 (born before 1946) — and even that is functionally moot, because by TY 2026 the youngest Tier 1 taxpayer is 81 years old and the cohort is shrinking.  _(RAB 2026-1)_

### 3.3 Why the structure matters even after 2026

Three reasons the tiers continue to matter even at full restoration:

1. **Public vs. private retirement income still differs for Tier 1.** A Tier 1 taxpayer with $200,000 of public Michigan state pension income subtracts the entire $200,000 (because public pensions for pre-1946 retirees are unlimited under MCL 206.30(1)(f)(i)) and may still claim private retirement subtraction up to the cap, but only to the extent the cap is not already exhausted by public pension income (Worksheet 3.1 / 3.2 lines 3–7; the form deducts public benefits from the cap before measuring private benefits).
2. **The all-income $20,000/$40,000 standard deduction at age 67+ is still on the menu** as an alternative to the phased pension subtraction. For a Tier 2 or Tier 3 taxpayer with substantial non-retirement income (e.g., Schedule C self-employment, large investment income), the all-income deduction may be more valuable than even the 100% phased pension subtraction. The taxpayer must compute both and "claim the most beneficial" (Form 4884 questionnaire, page 22 of instructions, footnote †).
3. **The Tier 3 Social-Security-offset relief under PA 24 of 2025** is only available for Tier 3 (born after 1952) and only for TY 2026 through TY 2028. Tier 2 taxpayers using the $20,000/$40,000 standard deduction must still offset by Social Security benefits separately deducted on Schedule 1 line 14.

## Section 4: Tier 1 deterministic rules

**Tier 1 deterministic rules table**

| Rule ID | Rule | Source |
| --- | --- | --- |
| MI-PEN-T1-01 | Begin with federal AGI from federal Form 1040, line 11. Form 4884 reports a **subtraction** that flows to Schedule 1 (MI-1040) line 27. | MCL 206.30(1)(f) |
| MI-PEN-T1-02 | "Key person" for joint filers = older of taxpayer or spouse. The tier is determined by the key person's year of birth (instructions, Q3 of "Which Section Should I Complete"). | 4884 Instr. p. 22 |
| MI-PEN-T1-03 | Social Security, railroad retirement, U.S. Armed Forces retirement, and Michigan National Guard retirement are **always fully subtracted** on Schedule 1 line 11, regardless of tier. Do **not** include them on Form 4884 line 8. | 4884 Instr. p. 20 |
| MI-PEN-T1-04 | The Form 4884 cap (Worksheet 3.1/3.2/3.3 line 1) is **$65,897 single / $131,794 MFJ** for tax year 2025. For TY 2026 the indexed cap is $67,610 / $135,220 (per RAB 2026-1). | 4884 Worksheet 3.1–3.3 |
| MI-PEN-T1-05 | The cap on Form 4884 line 1 of each worksheet must be reduced by military / National Guard / railroad retirement subtractions claimed on Schedule 1 line 11. This is **Worksheet 3.1 line 2**, **Worksheet 3.2 line 2**, **Worksheet 3.3 line 2**. | 4884 Worksheet 3.1–3.3 |
| MI-PEN-T1-06 | **Tier 1 (born before 1946):** complete **Section A** of Form 4884. Subtract **all** public Michigan and federal retirement benefits, plus private benefits up to the cap remaining after public benefits are absorbed (Worksheet 3.1 logic: cap minus public benefits, then take the smaller of remainder or private benefits). | MCL 206.30(1)(f)(i); 4884 Instr. p. 19 |
| MI-PEN-T1-07 | **Tier 2 (born 1946 – 1952):** Choose **most beneficial of** (i) Section B Form 4884 pension subtraction (Worksheet 3.1), (ii) Section D phased subtraction (Worksheet 3.3, 75% in 2025), or (iii) Worksheet 2 all-income $20,000/$40,000 Michigan Standard Deduction if age 67+. | MCL 206.30(9); 4884 Instr. p. 22 questionnaire |
| MI-PEN-T1-08 | **Tier 3 (born 1953 – 1958):** Choose **most beneficial of** (i) Section D phased subtraction (Worksheet 3.3, 75% in 2025), or (ii) Worksheet 2 $20,000/$40,000 standard deduction if age 67+. There is **no Tier 3 Section B legacy retirement subtraction** unless the taxpayer is in SSA-exempt employment. | MCL 206.30(1)(f); 4884 Instr. p. 21 |
| MI-PEN-T1-09 | **Tier 3 (born 1959 – 1966):** Same as MI-PEN-T1-08 — use Worksheet 3.3 (Section D) for 2025. The cohort expansion is what newly admits 1963–1966 birth years to the phased subtraction in TY 2025. | 4884 Instr. p. 20 |
| MI-PEN-T1-10 | **Born after 1966 (TY 2025):** Generally **no retirement subtraction** is available except the Social Security / military / railroad exemption on Schedule 1 line 11. In TY 2026 this cohort becomes fully eligible for the 100% phased subtraction. | 4884 Instr. p. 21 |
| MI-PEN-T1-11 | **SSA-exempt employment recipients born 1 Jan 1959 – 1 Jan 1964 who have reached age 62:** May subtract up to $15,000 / $30,000 (MFJ both qualifying) via **Section C, Worksheet 3.2**. | 4884 Instr. p. 20–21; line 18 |
| MI-PEN-T1-12 | **SSA-exempt retirees born after 1 Jan 1959 retired as of 1 Jan 2013:** May subtract up to $35,000 single / $55,000 MFJ / $70,000 MFJ both qualifying via **Section B, Worksheet 3.1**. | 4884 Instr. p. 20; line 17 |
| MI-PEN-T1-13 | **Qualified Fire, Police, and County Corrections retiree** (and surviving spouse of one): may elect **unlimited** subtraction of all public retirement benefits from qualified service, plus private retirement subtraction up to cap — Section A regardless of birth year. Check Form 4884 line 6a. | MCL 206.30(11); 4884 Instr. p. 19 |
| MI-PEN-T1-14 | Roth IRA distributions are **not** included in federal AGI; therefore there is nothing to subtract and they do **not** appear on Form 4884 line 8. | 4884 Instr. p. 19 — only AGI-included benefits |
| MI-PEN-T1-15 | 401(k) / 403(b) distributions attributable to **unmatched** employee contributions, 457 plans, and Thrift Savings Plan distributions are **excluded** from qualifying retirement benefits. Do not list on Form 4884 line 8. | 4884 Instr. p. 19 |
| MI-PEN-T1-16 | Rollovers preserve the character of the original plan. A rollover from a qualifying public pension into an IRA is still "public" for purposes of Section A. | 4884 Instr. p. 19 |
| MI-PEN-T1-17 | Distributions taken **before the plan's stated retirement age** (e.g., separation-from-service distributions taken before age 55/59½ unless they qualify as Section 72(t)(2)(A)(iv) substantially-equal-periodic-payment) are **not** qualifying retirement benefits. Do not list on Form 4884 line 8. | 4884 Instr. p. 19 |
| MI-PEN-T1-18 | Surviving spouse rules: the survivor may use the **older of decedent's or surviving spouse's** year of birth to determine tier, **provided** the survivor (a) claimed a retirement or Social Security subtraction on the joint return filed in the year the spouse died and (b) has not remarried. Otherwise the survivor's own birth year governs. | 4884 Instr. p. 20 |
| MI-PEN-T1-19 | The Section A/B/C/D subtraction flows to **Schedule 1 (MI-1040) line 27**, **not** line 25 (additions) or line 11 (other subtractions). Schedule 1 line 11 is where Social Security / military / railroad are subtracted. | 4884 Instr. p. 21 (each section); Schedule 1 |
| MI-PEN-T1-20 | The 4.25% Michigan flat rate (MCL 206.51) applies after the subtraction is netted from federal AGI. There is no graduated effect, but the subtraction directly lowers Michigan taxable income dollar-for-dollar. | MCL 206.51 |

## Section 5: Tier 2 judgment rules

These rules require professional judgment. Each row carries a "flag for review" indicator — the model may compute the result but the human verifier must sign off before filing.

**Tier 2 judgment rules table**

| Rule ID | Situation | Judgment required |
| --- | --- | --- |
| MI-PEN-T2-01 | **Choose the most beneficial subtraction.** Form 4884 page 22 questionnaire instructs taxpayers in many cohorts to "complete Worksheet 2 and Worksheet 3.3 and claim the most beneficial subtraction." This is **not deterministic** — it requires computing both and comparing the resulting Michigan taxable income. | Compute both branches and apply the larger subtraction. Note that the "most beneficial" may be either (i) the phased pension subtraction or (ii) the all-income standard deduction depending on the mix of pension vs. non-pension income. **Flag for verifier confirmation**. |
| MI-PEN-T2-02 | **Tier 3 election: PA 4 phased subtraction vs. all-income standard deduction.** A 1955-born retiree age 70 in TY 2025 with $30,000 of pension and $25,000 of Schedule C income should consider that the $20,000 standard deduction reduces **all income** including the Schedule C, whereas the $49,423 Section D phased subtraction reduces **only pension income** (capped at the actual $30,000 of pension). The Section D path may still win because $30,000 > $20,000, but the analysis is fact-pattern-driven. | Compute both. Where pension < $20k single / $40k MFJ, the all-income deduction may win. Where pension > cap, Section D usually wins. **Flag for verifier confirmation**. |
| MI-PEN-T2-03 | **Pre-Snyder grandfathered pensions for Tier 3 taxpayers.** A 1955-born taxpayer who was already retired from a **qualifying public source** as of 1 January 2013 may, under certain conditions, retain the pre-Snyder treatment. The 2025 Form 4884 instructions handle this through the **SSA-exempt-employment-retired-as-of-1-Jan-2013** carve-out on line 17 (Section B, Worksheet 3.1) — but this is only for SSA-exempt employment (state/local government employees not covered by Social Security). | The grandfather rule does **not** restore pre-Snyder treatment for taxpayers covered by Social Security. **Confirm the taxpayer's SSA-exempt status with their employer or pension administrator** (typically state and local government employers in Michigan that opted out of Social Security). |
| MI-PEN-T2-04 | **Surviving spouse using decedent's year of birth.** If the decedent was Tier 1 (born before 1946) and the survivor is Tier 3 (born after 1952), the survivor can use Tier 1 treatment **only if** (a) the survivor claimed a retirement subtraction on the final joint return in the year of death and (b) has not remarried. Documentation of the prior return is mandatory. | Review the prior-year MI-1040 jointly filed with the decedent. If the decedent died in a year prior to the introduction of PA 4 of 2023, verify the subtraction was actually claimed. **Hold for verifier review**. |
| MI-PEN-T2-05 | **Rollover treatment.** A rollover from a qualified public pension into an IRA is still "public" for Form 4884 purposes (rule MI-PEN-T1-16), but if the IRA is subsequently rolled into a 401(k), the character may be murky — particularly if the new 401(k) is at a non-Michigan employer. | If the chain of rollovers is non-trivial, **flag for verifier review** and obtain the original 1099-R distribution codes and the plan documents establishing the public-source origin. |
| MI-PEN-T2-06 | **Part-year residency.** Form 4884 line 8F instructs part-year residents to use only the Michigan-source portion from Schedule NR line 10 column B. The subtraction is therefore limited proportionally. | Part-year residency is **out of scope** for this skill (mi-income-tax MI-R-01 refusal applies). |
| MI-PEN-T2-07 | **Spouses with different birth years and one deceased.** Joint return with surviving spouse born 1962 and pre-2025-deceased spouse born 1944 — survivor may elect to use decedent's year of birth (Tier 1) **only if** the conditions of MI-PEN-T2-04 are met. Otherwise survivor is Tier 3 and uses own year of birth. | Verify prior-return subtraction claim. **Flag**. |
| MI-PEN-T2-08 | **Public safety officer election (Section A under MCL 206.30(11)).** A retired Detroit firefighter born 1960 may elect Section A unlimited public pension treatment **regardless** of Tier 3 status. This election is exercised by checking Form 4884 line 6a. | Verify the taxpayer's service qualifies under the four enumerated categories (police/fire under 1969 PA 312, state police trooper/sergeant under 1980 PA 17, county corrections officer, or substantially-similar federal employment). **Flag for verifier**. |
| MI-PEN-T2-09 | **Married filing separately.** Single limits apply to MFS taxpayers (4884 Instr. p. 21 NOTE). MFS taxpayers cannot use the spouse's year of birth even if the spouse is older. The "key person" for MFS is always the filer (4884 Instr. p. 22 Q3). | Deterministic — apply single caps. No discretion. |
| MI-PEN-T2-10 | **Interaction with Michigan flow-through entity tax (FTE) elections.** A taxpayer receiving K-1 distributions from a PA 135 of 2021 electing flow-through entity does **not** include those K-1 distributions on Form 4884 — they are business income, not retirement income, even if the recipient is age 70. | Confirm K-1 income is reported on Schedule 1 line 1 / line 2 (business additions/subtractions), not on Form 4884. **Watch for misclassification on platform-prepared returns**. |

## Section 6: Worked examples

All examples assume tax year **2025** unless otherwise noted, Michigan resident the entire year, and a 4.25% flat rate. All dollar figures are calculation-stage, before personal exemptions and credits.

### 6.1 Example A — Tier 1 retiree, $60k pension + Social Security

Facts. Eleanor, single, born 1942 (age 83 in 2025), full-year Michigan resident. 2025 income:
- Michigan Public School Employees Retirement System (MPSERS) pension: $60,000
- Social Security benefits: $28,000 (federally taxable portion: $23,800)
- Interest income: $4,000

Federal AGI = $60,000 + $23,800 + $4,000 = $87,800.

Step 1 — Schedule 1 line 11 subtractions. Subtract $23,800 of Social Security from Michigan AGI.

Step 2 — Tier determination. Eleanor was born before 1946 → Tier 1 → complete Section A of Form 4884 (Instr. p. 19).

Step 3 — Worksheet 3.1 (Section B logic applied through Section A). The 2025 cap is $65,897 single. Eleanor's MPSERS pension is a Michigan public source. Under Tier 1, public benefits are unlimited up to the cap; she has no private pension here, so the full $60,000 is subtracted.

Step 4 — Form 4884 line 16 (Section A total). $60,000.

Step 5 — Schedule 1. Line 11 = $23,800 (Social Security); Line 27 = $60,000 (Form 4884).

Michigan AGI = $87,800 − $23,800 − $60,000 = $4,000 (only the interest income remains taxable). After personal exemption ($5,800), Eleanor has $0 Michigan taxable income and zero Michigan tax.

**Worksheet 3.1 (Example A)**

| Line | Amount |
| --- | --- |
| Worksheet 3.1 line 1 (cap, single) | $65,897 |
| Worksheet 3.1 line 2 (military/NG/railroad) | $0 |
| Worksheet 3.1 line 3 (public benefits) | $60,000 |
| Worksheet 3.1 line 4 (sum 2+3) | $60,000 |
| Worksheet 3.1 line 5 (cap − line 4) | $5,897 |
| Worksheet 3.1 line 6 (private benefits) | $0 |
| Worksheet 3.1 line 7 (smaller of 5 or 6) | $0 |
| Worksheet 3.1 line 8 (3 + 7) | $60,000 |

### 6.2 Example B — Tier 2 retiree, mixed pension and 401(k)

Facts. Frank and Helen, married filing jointly. Frank is the older spouse, born 1948 (age 77 in 2025) → Tier 2. Helen born 1951. Both retired. 2025 income:
- Frank's General Motors private pension (non-Michigan public source): $42,000
- Frank's traditional IRA distribution: $18,000
- Helen's 401(k) distribution (matched employer contributions only): $24,000
- Social Security (Frank + Helen, taxable portion): $30,000
- U.S. Treasury bond interest (subtracted separately): $3,000

Federal AGI = $42,000 + $18,000 + $24,000 + $30,000 + $3,000 = $117,000.

Step 1 — Schedule 1 subtractions before Form 4884. Subtract $30,000 Social Security and $3,000 U.S. Treasury interest on Schedule 1 line 11.

Step 2 — Tier determination. Older spouse born 1948 → Tier 2 → "Did the key person reach age 67? Yes → complete Worksheet 2 and Worksheet 3.3 and claim the most beneficial" (4884 Instr. p. 22, Q6 path).

Section D subtraction = $84,000. All three retirement amounts are qualifying private benefits (Frank's GM pension is not a Michigan public source; IRA distributions after 59½ qualify; matched-contribution 401(k) qualifies).

Step 3b — Worksheet 2 (all-income Michigan Standard Deduction). MFJ, both spouses 67+ → $40,000 standard deduction. Less Social Security offset of $30,000 (Tier 2 must offset under MCL 206.30(9), and PA 24 of 2025 relief does not apply to Tier 2) → net standard deduction = $10,000. [VERIFY: the precise mechanics of the Social Security offset calculation in Worksheet 2 for TY 2025 should be re-confirmed line-by-line before filing.]

Step 4 — Choose most beneficial. $84,000 (Section D) >> $10,000 (Worksheet 2). Use Section D, enter $84,000 on Form 4884 line 19 → Schedule 1 line 27.

Step 5 — Michigan AGI. $117,000 − $30,000 − $3,000 − $84,000 = $0. No Michigan tax.

**Worksheet 3.3 (Example B)**

| Line | Amount |
| --- | --- |
| Line 1 (cap, MFJ) | $131,794 |
| Line 2 (military/NG/railroad) | $0 |
| Line 3 (line 1 − line 2) | $131,794 |
| Line 4 (75% × line 3) | $98,846 |
| Line 5 (total retirement on line 8 — Frank's pension + IRA + Helen's 401(k)) | $84,000 |
| Line 6 (smaller of 4 or 5) | $84,000 |

### 6.3 Example C — Tier 3 retiree, PA 4 phased restoration vs. legacy

Facts. Mark, single, born 1956 (age 69 in 2025) → Tier 3. Retired 2018 from a private employer. Not in SSA-exempt employment. Not a qualified public safety officer. 2025 income:
- Traditional IRA distribution: $55,000
- Private pension from former employer (matched 401(k) annuity): $20,000
- Social Security: $26,000 (federally taxable portion: $22,100)
- Schedule C self-employment net profit (part-time consulting): $35,000

Federal AGI = $55,000 + $20,000 + $22,100 + $35,000 = $132,100.

Step 1 — Schedule 1 line 11. Subtract $22,100 Social Security.

Step 2 — Tier determination. Born 1956, age 69 in 2025. "Did key person reach age 67? Yes → complete Worksheet 2 and Worksheet 3.3 and claim the most beneficial" (4884 Instr. p. 22, Q6 path). No SSA-exempt-employment carve-out (so Worksheet 3.1 / 3.2 do not apply).

Section D subtraction = $49,423.

Step 3b — Worksheet 2 (all-income Michigan Standard Deduction). Single, age 67+ → $20,000 standard deduction.
- Less Social Security offset: For Tier 3, PA 24 of 2025 (effective TY 2026–2028) removes the Social Security offset against the standard deduction. In 2025, however, the offset still applies — so the $22,100 Social Security must reduce the $20,000 deduction → net Worksheet 2 = $0. [VERIFY: confirm whether PA 24 of 2025's effective-date language reaches back into TY 2025 or only begins at TY 2026. The most likely reading is TY 2026 onward, in which case TY 2025 Tier 3 returns still face the offset. RAB 2026-1 should clarify on publication.]

Step 4 — Choose most beneficial. $49,423 (Section D) > $0 (Worksheet 2). Use Section D. Enter $49,423 on Form 4884 line 19 → Schedule 1 line 27.

Step 5 — Michigan AGI. $132,100 − $22,100 − $49,423 = $60,577. Less personal exemption ($5,800) = $54,777 taxable. Tax at 4.25% = $2,328.

TY 2026 contrast. Same facts in TY 2026 with full 100% restoration (cap $67,610 single):
- Section D subtraction = min($67,610, $75,000) = $67,610.
- Worksheet 2 = $20,000 standard deduction with no Social Security offset under PA 24 of 2025 (Tier 3 only, TY 2026–2028) = $20,000.
- Section D still wins: $67,610 > $20,000.
- Michigan AGI = $132,100 − $22,100 − $67,610 = $42,390. Tax at 4.25% (assuming rate unchanged) = roughly $1,557 — a roughly $770 tax saving versus 2025 from the phase-in moving from 75% to 100%.

This is exactly the dynamic the Lowering MI Costs Plan was designed to produce: a meaningful per-retiree tax cut in 2026 relative to 2025, on top of the recent reductions for the same household in 2023 and 2024.

**Worksheet 3.3 (Example C)**

| Line | Amount |
| --- | --- |
| Line 1 (cap, single) | $65,897 |
| Line 2 (military/NG/railroad) | $0 |
| Line 3 (1 − 2) | $65,897 |
| Line 4 (75% × line 3) | $49,423 |
| Line 5 (total retirement = IRA + private pension) | $75,000 |
| Line 6 (smaller of 4 or 5) | $49,423 |

## Section 7: Form 4884 mapping

### 7.1 Form 4884 structure

- **Mutually exclusive sections** — Form 4884 has four mutually exclusive computational sections plus a header (lines 1–8). A taxpayer completes exactly one of Section A, Section B, Section C, or Section D based on the Form 4884 page-22 questionnaire and rules MI-PEN-T1-06 through MI-PEN-T1-13.  _(MI-PEN-T1-06 through MI-PEN-T1-13)_

**Form 4884 sections table**

| Section | Carry-to line on Form 4884 | Worksheet | Who uses it |
| --- | --- | --- | --- |
| Section A | Line 16 | (logic embedded in Section A; mirrors Worksheet 3.1 structure for public/private cap interaction) | Tier 1 (born pre-1946); Qualified Fire/Police/County Corrections retirees electing MCL 206.30(11) |
| Section B | Line 17 | Worksheet 3.1 | Tier 2 retirement subtraction; SSA-exempt-retired-1/1/2013 (born after 1959) |
| Section C | Line 18 | Worksheet 3.2 | SSA-exempt-employment-recipient born 1 Jan 1959 – 1 Jan 1964 reached age 62 |
| Section D | Line 19 | Worksheet 3.3 | PA 4 of 2023 phased subtraction — Tier 2 and Tier 3 eligible cohort |

### 7.2 Form 4884 line-by-line (TY 2025)

**Form 4884 line-by-line table**

| Line | Purpose | Notes |
| --- | --- | --- |
| 1–3 | Name, SSN | Both SSNs for MFS; do not enter spouse's name on MFS |
| 4, 5 | Year of birth for each spouse | Do not enter spouse year on MFS |
| 6a | Box: Qualified Fire/Police/County Corrections retiree | Triggers MCL 206.30(11) unlimited public pension election |
| 6b | Box: Born after 1/1/1959 AND retired 1/1/2013 from SSA-exempt employment | Triggers Section B Worksheet 3.1 path with elevated $35k/$55k/$70k caps |
| 7a–7d | Deceased spouse info (if claiming based on decedent's year of birth) | Decedent must have died prior to current tax year |
| 8 | Retirement benefits listing — up to 8 entries (continuation Form 4973 for >8) | Columns: payer FEIN, distribution code, taxable amount; column 8B flags decedent-attributable; column 8F is the taxable amount included in federal AGI |
| 9–15 | Section A (Tier 1 / public safety) computation | Cap subject to military/railroad offset on line 10; line 16 carries to Schedule 1 line 27 |
| 16 | Section A total → Schedule 1 line 27 | Do not complete B/C/D |
| 17 | Section B total → Schedule 1 line 27 | From Worksheet 3.1 line 12 |
| 18 | Section C total → Schedule 1 line 27 | From Worksheet 3.2 line 10 |
| 19 | Section D total → Schedule 1 line 27 | From Worksheet 3.3 line 6 |

### 7.3 Schedule 1 (MI-1040) interaction

**Schedule 1 interaction table**

| Schedule 1 line | Item | Relationship to Form 4884 |
| --- | --- | --- |
| Line 11 | Income from U.S. govt bonds, military/NG retirement, railroad retirement, Social Security | Subtracted separately, but reduces the Form 4884 cap (Worksheets 3.1/3.2/3.3 line 2) |
| Line 14 | Other subtractions (incl. Social Security details) | Tier 2/3 box 24C/24G add $15k/$30k to Form 4884 Worksheet 3.1 line 10 |
| Line 27 | Retirement benefits subtraction from Form 4884 | Carries from line 16, 17, 18, or 19 (whichever section completed) |

### 7.4 Worksheet 2 (all-income Michigan Standard Deduction)

Worksheet 2 is not Form 4884 — it is filed on Schedule 1 directly (the $20,000 / $40,000 deduction is a Schedule 1 entry, not a Form 4884 subtraction). It is referenced from the Form 4884 questionnaire only as the alternative to be compared against on the "most beneficial" rule.

**Worksheet 2 baseline table**

| Status | Worksheet 2 baseline | Offset by Schedule 1 line 11 items |
| --- | --- | --- |
| Single 67+ | $20,000 | Yes (military/NG, railroad, Social Security — except PA 24 of 2025 Tier 3 relief TY 2026–2028) |
| MFJ both 67+ | $40,000 | Yes (same offsets) |
| MFJ one 67+, one not | $20,000 (older spouse only) | Yes |

## Section 8: Refusal catalogue

**Refusal catalogue table**

| ID | Situation | Action |
| --- | --- | --- |
| MI-PEN-R-01 | Part-year or non-resident return | **Refuse** — outside Form 4884 simplification scope; see mi-income-tax MI-R-01 |
| MI-PEN-R-02 | Multi-state pension (taxpayer worked for non-Michigan public employer covered by another state's reciprocal pension subtraction rule) | **Refuse** — requires reciprocity analysis under MCL 206.30(1)(f) "public benefits from other states that offer a similar or reciprocal subtraction or exemption for Michigan public benefits" — fact-pattern and other-state-statute review required |
| MI-PEN-R-03 | Tier 4-style question — pension received as separation pay before retirement age | **Refuse** — 4884 Instr. p. 19 excludes pre-retirement separation distributions, but borderline cases (e.g., disability retirement before 55) require plan-document review |
| MI-PEN-R-04 | Surviving spouse claim where prior joint return is not available | **Refuse** — survivor election turns on whether prior-year subtraction was actually claimed; without the prior return, election is unsupported |
| MI-PEN-R-05 | Qualified Fire/Police/County Corrections election where service mix is unclear (e.g., partial Michigan service, partial out-of-state) | **Refuse** — MCL 206.30(11) requires service under 1969 PA 312, 1980 PA 17, or county sheriff facility; out-of-state service does not qualify unless "substantially similar federal employment"; flag for verifier |
| MI-PEN-R-06 | Roth conversions in retirement — taxable portion treatment on Form 4884 | **Refuse** — taxable Roth conversion amounts are included in federal AGI; whether they qualify on Form 4884 line 8 turns on the source plan (matched 401(k) → IRA → Roth conversion likely qualifies; unmatched 401(k) → IRA → Roth conversion likely does not). Requires source-plan analysis |
| MI-PEN-R-07 | Inherited IRA distributions where decedent was Tier 1 but beneficiary is Tier 3 and not the surviving spouse | **Refuse** — non-spousal inherited IRA falls outside the "qualifying surviving spouse" rule; beneficiary uses own birth year; flag for verifier |
| MI-PEN-R-08 | TY other than 2025 or 2026 | **Refuse** — caps and phase-in percentages change annually; use the year-specific Form 4884 instructions |
| MI-PEN-R-09 | Michigan city income tax on retirement benefits | **Refuse** — most Michigan cities (Detroit, Grand Rapids, etc.) **exclude** retirement income from city tax base, but each city's rules differ. Out of scope; refer to mi-income-tax MI-R-03 |
| MI-PEN-R-10 | Mid-year change in residency where retirement payments straddle | **Refuse** — Schedule NR analysis required; out of scope |
| MI-PEN-R-11 | Public Act 24 of 2025 fact patterns where the Social Security offset interaction with the standard deduction is dispositive | **Computational caution** — RAB 2026-1 must be confirmed against the actual published text before relying on the Tier 3 offset relief; flag with [VERIFY:] for human verifier |
| MI-PEN-R-12 | Distributions from Michigan-source pension to non-resident — Michigan source-rule analysis | **Refuse** — non-resident return out of scope |

## Section 9: Provenance

### 9.1 Primary statutory and form authorities

- **MCL 206.30(1)(f)** — The general retirement subtraction language, including the public/private distinction and the phased restoration language added by PA 4 of 2023. The (1)(f)(i) clause is the legacy Tier 1 rule; (1)(f)(ii) is the PA 4 phased restoration.  _(MCL 206.30(1)(f))_
- **MCL 206.30(9)** — The Michigan Standard Deduction at age 67+ ($20,000 / $40,000), the box 24C/24G SSA-exempt add-ons, and the offset mechanics. PA 24 of 2025 amended subsection (9) to remove the offset for Tier 3 taxpayers for TY 2026–2028.  _(MCL 206.30(9))_
- **MCL 206.30(10)** — Definitional cross-references for retirement-benefit types (qualifying private vs. public, surviving-spouse rules).  _(MCL 206.30(10))_
- **MCL 206.30(11)** — Qualified Fire/Police/County Corrections officer unlimited-election clause, added by PA 4 of 2023.  _(MCL 206.30(11))_
- **PA 4 of 2023 (Lowering MI Costs Plan)** — Signed 7 March 2023; effective 13 February 2024. Established the four-year phase-in (25% → 50% → 75% → 100%) and the public-safety-officer election.  _(PA 4 of 2023)_
- **PA 24 of 2025** — Signed 7 October 2025. Amended MCL 206.30(9) to remove the Social Security offset against the Tier 3 Michigan Standard Deduction for TY 2026 through TY 2028.  _(PA 24 of 2025)_
- **Form 4884 (TY 2025) and Instructions** — The official form and 30-page instructions package. The Worksheets 2, 3.1, 3.2, 3.3 and the "Which Section of Form 4884 Should I Complete?" page-22 questionnaire are the operational core of this skill.  _(Form 4884 (TY 2025) and Instructions)_
- **Revenue Administrative Bulletin 2023-22** — Treasury's official interpretation of PA 4 of 2023, referenced from the 2025 Form 4884 instructions (page 21).  _(Revenue Administrative Bulletin 2023-22)_
- **Revenue Administrative Bulletin 2026-1** — Treasury's published guidance on TY 2026 caps and the PA 24 of 2025 amendments. The TY 2026 cap of $67,610 / $135,220 used in this skill traces to this bulletin.  _(Revenue Administrative Bulletin 2026-1)_

### 9.2 Secondary references

10. Michigan Treasury — Retirement and Pension Benefits landing page
11. Michigan Treasury — 2025 Tier III guidance page
12. Michigan ORS — FAQs for PA 4 of 2023
13. Michigan House Fiscal Agency — "Three-Tiered Treatment of Retirement Income" snapshot (March 2023)
14. MERS of Michigan — Changes to Michigan Tax on Retirement and Pension Benefits
15. LegalClarity — Michigan Retirement Subtraction: Rules, Tiers, and Limits

### 9.3 Verification notes

Items marked [VERIFY:] inline in Section 2.3, Section 2.4, Section 6.2, and Section 6.3 require the human verifier to re-confirm against the published RAB 2026-1 and the TY 2025 Form 4884 instructions (URLs above) before any return is signed. Specifically:

- The TY 2026 indexed cap of $67,610 / $135,220 — confirm from RAB 2026-1 published text once the PDF is released.
- The PA 24 of 2025 effective date — confirm whether the Tier 3 Social Security offset relief begins in TY 2025 (October 2025 effective date) or TY 2026 (most likely reading).
- The scope of PA 24 of 2025 — confirm whether the offset relief applies only to Social Security or also to railroad / military / National Guard retirement offsets in Worksheet 2.

## Disclaimer

This skill and its outputs are provided for informational and computational purposes only and do not constitute tax, legal, or financial advice. Open Accountants and its contributors accept no liability for any errors, omissions, or outcomes arising from the use of this skill. The Form 4884 "claim the most beneficial subtraction" architecture requires per-taxpayer optimization that no software output can substitute for a credentialed review. All outputs must be reviewed and signed off by a qualified Michigan-licensed CPA or Enrolled Agent before filing or acting upon.

The most up-to-date, verified version of this skill is maintained at [openaccountants.com](https://openaccountants.com).

## Talk to a verified accountant

This skill is a tool, not an engagement. Every taxpayer's situation is different, and the rules in the skill may not match your specific facts.

To speak with one of the licensed accountants who verifies skills for your jurisdiction — no liability on either side until you and the accountant sign a formal engagement letter — book a free 30-minute call:

→ [Book a call](https://calendly.com/openaccountants-info/30min)

We'll route you to the named verifier covering your country or state. You can also see the full list of verified accountants at [openaccountants.com/network](https://openaccountants.com/network).