Asked about North Carolina individual income tax for self-employed / sole proprietors.
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NC individual income tax rate (TY 2025)
4.25%Session Law 2023-134; NCDOR Tax Rate Schedules; N.C.G.S. §105-153.7
NC individual income tax rate (TY 2026)
3.99%Session Law 2023-134; NCDOR Tax Rate Schedules
NC Form D-400 filing deadline (TY 2025)
April 15, 2026NCDOR, 2025 D-401 Individual Income Tax Instructions
NC Form D-400 extension deadline (TY 2025)
October 15, 2026NCDOR, 2025 D-401 Individual Income Tax Instructions
Standard deduction — Single (TY 2025)
$12,750N.C.G.S. §105-153.5(a)(1)
Standard deduction — Married Filing Jointly (TY 2025)
$25,500N.C.G.S. §105-153.5(a)(1)
Standard deduction — Married Filing Separately (TY 2025)
$12,750N.C.G.S. §105-153.5(a)(1)
Standard deduction — Head of Household (TY 2025)
$19,125N.C.G.S. §105-153.5(a)(1)
Child deduction per child — NC AGI (MFJ) up to $40,000
$3,000 per childN.C.G.S. Chapter 105, Article 4; NCDOR 2025 D-401 Individual Income Tax Instructions
Child deduction per child — NC AGI (MFJ) $40,001–$60,000
$2,500 per childN.C.G.S. Chapter 105, Article 4; NCDOR 2025 D-401 Individual Income Tax Instructions
Child deduction per child — NC AGI (MFJ) $60,001–$80,000
$2,000 per childN.C.G.S. Chapter 105, Article 4; NCDOR 2025 D-401 Individual Income Tax Instructions
Child deduction per child — NC AGI (MFJ) $80,001–$100,000
$1,500 per childN.C.G.S. Chapter 105, Article 4; NCDOR 2025 D-401 Individual Income Tax Instructions
Child deduction per child — NC AGI (MFJ) $100,001–$120,000
$1,000 per childN.C.G.S. Chapter 105, Article 4; NCDOR 2025 D-401 Individual Income Tax Instructions
Child deduction per child — NC AGI (MFJ) $120,001–$140,000
$500 per childN.C.G.S. Chapter 105, Article 4; NCDOR 2025 D-401 Individual Income Tax Instructions
Child deduction per child — NC AGI (MFJ) over $140,000
$0 per childN.C.G.S. Chapter 105, Article 4; NCDOR 2025 D-401 Individual Income Tax Instructions
Personal exemptions
$0 — NC does not have personal exemptionsN.C.G.S. Chapter 105, Article 4
Local income tax permitted
None — NC does not permit local income taxesN.C.G.S. Chapter 105, Article 4
NC Section 179 deduction limit
$25,000N.C.G.S. §105-153.6
NC bonus depreciation (IRC §168(k)) conformity
NC does not conform to IRC §168(k) bonus depreciation; difference must be added back on Schedule SN.C.G.S. §105-130.5B
Estimated tax payment threshold
$1,000 expected liability (after withholding and credits)N.C.G.S. §105-163.15
Estimated tax — 1st quarter due date
April 15N.C.G.S. §105-163.15
Estimated tax — 2nd quarter due date
June 15N.C.G.S. §105-163.15
Estimated tax — 3rd quarter due date
September 15N.C.G.S. §105-163.15
Estimated tax — 4th quarter due date
January 15 (following year)N.C.G.S. §105-163.15
Social Security benefits taxability
NC does not tax Social Security benefitsN.C.G.S. §105-153.5(b)(8)
NC taxable income formula
Federal AGI ± NC modifications − standard/itemized deduction − child deductionN.C.G.S. §105-153.4
NC income tax computation formula (TY 2025)
NC taxable income × 4.25%N.C.G.S. §105-153.7; Session Law 2023-134
NC NOL deduction limit (post-2017)
80% of taxable income; carryforward only (no carryback)N.C.G.S. Chapter 105, Article 4
Primary tax form
Form D-400NCDOR, 2025 D-401 Individual Income Tax Instructions
Estimated tax payment form
Form NC-40N.C.G.S. §105-163.15; NCDOR
D-400 Line 15 — NC income tax
Line 14 × 0.0425NCDOR, 2025 D-401 Individual Income Tax Instructions; N.C.G.S. §105-153.7
Scope. This skill covers North Carolina Form D-400 (Individual Income Tax Return) for full-year NC residents who are sole proprietors or single-member LLC owners. Tax year 2025 (returns filed in 2026). North Carolina uses a flat income tax rate.
Quality tier. Q3 — AI-drafted, not independently verified. All outputs must be reviewed by a qualified tax professional before filing.
Metadata table
| Field | Value |
|---|---|
| Tax type | Individual income tax |
| Jurisdiction | North Carolina (US-NC) |
| Tax year | 2025 (filed 2026) |
| Primary form | Form D-400 |
| Supporting schedules | D-400 Schedule S (Additions/Deductions), D-400TC (Tax Credits), D-400 Schedule A (NC Itemized Deductions) |
| Tax structure | Flat rate |
| Rate | 4.25% (TY 2025) |
| Filing deadline | April 15, 2026 |
| Extension deadline | October 15, 2026 |
| Tax authority | North Carolina Department of Revenue (NCDOR) |
| Website | https://www.ncdor.gov |
| Statute | N.C.G.S. Chapter 105, Article 4 |
Sources:
Tax rate schedule (Session Law 2023-134; NCDOR Tax Rate Schedules)
| Tax year | Rate | Source |
|---|---|---|
| 2025 | 4.25% | Session Law 2023-134; NCDOR Tax Rate Schedules |
| 2026 | 3.99% | Session Law 2023-134; NCDOR Tax Rate Schedules |
North Carolina applies a single flat rate to all taxable income regardless of filing status or income level.
Standard deduction table
| Filing status | Standard deduction |
|---|---|
| Single | $12,750 |
| Married filing jointly | $25,500 |
| Married filing separately | $12,750 |
| Head of household | $19,125 |
Child deduction table
| NC AGI threshold (MFJ) | Deduction per child |
|---|---|
| Up to $40,000 | $3,000 |
| $40,001 – $60,000 | $2,500 |
| $60,001 – $80,000 | $2,000 |
| $80,001 – $100,000 | $1,500 |
| $100,001 – $120,000 | $1,000 |
| $120,001 – $140,000 | $500 |
| Over $140,000 | $0 |
NC does not have personal exemptions — the child deduction is the only per-dependent benefit.
North Carolina taxable income starts with federal adjusted gross income (AGI) from federal Form 1040, Line 11.
Addition modifications table
| Addition | Description |
|---|---|
| Interest from other states' bonds | Interest income from bonds of states other than NC |
| Bonus depreciation add-back | NC does not conform to IRC §168(k) bonus depreciation |
| Section 179 excess | NC limits §179 to $25,000 (does not conform to federal expanded amount) |
Subtraction modifications table
| Subtraction | Description |
|---|---|
| US government bond interest | Interest from US Treasury obligations |
| Retirement benefits (Bailey Settlement) | Certain state/local government retirees exempt per court settlement |
| Social Security | NC does not tax Social Security benefits |
Estimated tax installment due dates
| Installment | Due date |
|---|---|
| 1st quarter | April 15 |
| 2nd quarter | June 15 |
| 3rd quarter | September 15 |
| 4th quarter | January 15 (following year) |
Form NC-40 is used for estimated tax payments.
Tier 1 rules table
| Rule ID | Rule | Source |
|---|---|---|
| NC-T1-01 | NC taxable income = federal AGI ± NC modifications − standard/itemized deduction − child deduction | N.C.G.S. §105-153.4 |
| NC-T1-02 | Tax = NC taxable income × 4.25% (TY 2025) | N.C.G.S. §105-153.7; Session Law 2023-134 |
| NC-T1-03 | Standard deduction: $12,750 (S), $25,500 (MFJ), $12,750 (MFS), $19,125 (HOH) | N.C.G.S. §105-153.5(a)(1) |
| NC-T1-04 | NC §179 limit = $25,000 | N.C.G.S. §105-153.6 |
| NC-T1-05 | NC does not conform to IRC §168(k) bonus depreciation | N.C.G.S. §105-130.5B |
| NC-T1-06 | Estimated tax required if expected liability ≥ $1,000 | N.C.G.S. §105-163.15 |
| NC-T1-07 | NC does not tax Social Security benefits | N.C.G.S. §105-153.5(b)(8) |
Tier 2 rules table
| Rule ID | Situation | Guidance |
|---|---|---|
| NC-T2-01 | Multi-state income: Taxpayer has income from another state | NC taxes all income of residents; credit for taxes paid to other states available on D-400TC. Allocation requires review. |
| NC-T2-02 | Business vs. hobby determination | NC follows federal hobby loss rules. If IRS disallows Schedule C, NC deductions are also disallowed. |
| NC-T2-03 | IRC conformity date changes | NC references IRC as of a specific date. If federal law changed after NC's conformity date, add-backs or subtractions may be required. Verify conformity date for the tax year. |
| NC-T2-04 | Home office deduction | NC conforms to federal home office deduction rules. Flows through federal AGI. No separate NC adjustment needed. |
| NC-T2-05 | Net operating losses | NC conforms to federal NOL rules with modifications. Post-2017 NOLs limited to 80% of taxable income. Carryforward only (no carryback). |
Supplier pattern library table
| Input needed | Where to find it |
|---|---|
| Federal AGI | Federal Form 1040, Line 11 |
| NC additions | Schedule S, Part A (computed from federal return) |
| NC deductions | Schedule S, Part B (computed from federal return) |
| Standard deduction | Based on filing status |
| Child deduction | Based on NC AGI and number of qualifying children |
| Tax credits | D-400TC (credit for taxes paid to other states, child tax credit, etc.) |
| Estimated tax payments | NC-40 records |
| NC withholding | W-2 Box 17 / 1099 NC withholding amounts |
Form D-400 line mapping table
| Form D-400 Line | Description | Source |
|---|---|---|
| Line 6 | Federal adjusted gross income | Federal 1040, Line 11 |
| Line 7 | Additions from Schedule S | Schedule S, Part A total |
| Line 9 | Deductions from Schedule S | Schedule S, Part B total |
| Line 11 | NC standard deduction or NC itemized deductions | Computed |
| Line 13 | Child deduction | Based on NC AGI and dependents |
| Line 14 | NC taxable income | Line 6 + Line 7 − Line 9 − Line 11 − Line 13 |
| Line 15 | NC income tax | Line 14 × 0.0425 |
| Line 20 | Tax credits | D-400TC total |
| Line 23 | NC tax withheld | W-2s / 1099s |
| Line 25 | Estimated tax payments | NC-40 payments |
Refusal catalogue table
| Refusal ID | Trigger | Response |
|---|---|---|
| R-NC-01 | Part-year or nonresident | "NC part-year and nonresident returns require Schedule PN. This is outside the scope of this skill." |
| R-NC-02 | Corporate or S-corp return | "This skill covers individual income tax only (Form D-400). Corporate returns (CD-405) are not covered." |
| R-NC-03 | Estate or trust return | "NC fiduciary returns (Form D-407) are not covered by this skill." |
| R-NC-04 | Amended return | "NC amended returns (Form D-400X Amended) are not covered." |
| R-NC-05 | Pass-through entity tax | "NC PTET elections are not covered by this skill." |
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Other North Carolina computations in the OpenAccountants Tax Library.
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