--- oa_review_kit: v1 guide_slug: in-advance-tax guide_version: in-advance-tax@2026-04-13T17:54:00.934Z archetype: personal_income --- # Review kit: IN Advance Tax 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/in-advance-tax/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 ("IN Advance Tax", slug `in-advance-tax`). 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. [intake_questions] A new personal-tax client sits down. What are your first five questions before you touch a number? 2. [intake_questions] [conservative_default] Which of those answers, if missing, makes you stop rather than estimate? 3. [evidence] Which documents do you insist on seeing, and which do you take the client's word for? 4. [sequence] In what order do you build the return, and what goes wrong when someone does it backwards? 5. [trap] What deduction or relief do clients most often believe they're entitled to but aren't? 6. [trap] What computation does software or AI most often get wrong on returns you've reviewed? 7. [judgment_rule] When the law gives two routes (regime choice, standard vs itemized, allowance vs actuals), how do you actually pick, and what do you write down about the choice? 8. [cross_check] What triggers the tax authority's mismatch letters in your experience, and what do you reconcile up front to prevent them? 9. [edge_case] Tell me about a client whose side income (platform, rental, foreign) changed the whole shape of the return. What did you do differently? 10. [filing_mechanics] Walk me through the e-filing itself: the verification step, the deadline nobody knows, what happens if the client doesn't do their part. 11. [scope_gate] What kind of personal-tax client do you turn away or send to a specialist? 12. [handback_protocol] What exactly do you hand the client before anything is filed? 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:]` heading where `` 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: in-advance-tax guide_version: in-advance-tax@2026-04-13T17:54:00.934Z reviewer_name: reviewer_credential: # free text: CPA, EA, ACCA, Steuerberater... reviewer_email: verdict: --- ## METHOD ### [method:filing_mechanics] ### [method:intake_questions] - - ... ## FACT CORRECTIONS | fact_key | current | correct | source | |---|---|---|---| | | | | | ## FLAGS - [unsettled] - [refer] ## NOTES ``` 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 --- name: in-advance-tax description: Use this skill whenever asked about Indian advance tax for self-employed individuals, freelancers, or professionals. Trigger on phrases like "advance tax India", "advance tax instalments", "Section 234B", "Section 234C", "Challan 280", "advance tax due dates", "interest on late advance tax", "presumptive tax instalment", "estimated tax India", or any question about advance tax obligations under the Income-tax Act 1961. This skill covers the quarterly instalment schedule, presumptive taxation single instalment, threshold, interest for shortfall under s.234B and s.234C, senior citizen exemption, Challan 280 payment procedure, TDS credit interaction, and edge cases. ALWAYS read this skill before touching any advance tax-related work for India. jurisdiction: IN domain: income-tax tax_year: 2025 --- # in-advance-tax ## Verified rates & thresholds (accountant-reviewed) - **Reviewer note** — Reviewed against the cited tax authorities by Mayur Deokar on 2026-06-06. Items flagged for further clarification are tracked separately and excluded here. This block is generated from verified skill_facts — edit the facts, not the prose. ### Advance Tax - **15 September — 2nd** — 45% cumulative _(ITA s 211)_ - **15 December — 3rd** — 75% cumulative _(ITA s 211)_ - **15 March — 4th** — 100% cumulative _(ITA s 211)_ - **Instalment** — Single payment by 15 March (100%) _(ITA s 211(1)(b))_ - **Exempt if** — Resident 60+, NO business/professional income _(ITA s 207)_ - **NOT exempt if** — Senior WITH business/professional income _(ITA s 207)_ - **Tax applicable code** — 0021 (IT — Other than Companies) _(ITNS 280)_ - **Type of payment code** — 100 (Advance Tax) _(ITNS 280)_ - **15 June — 1st instalment** — 15% cumulative _(ITA s 211)_ - **15 September — 2nd instalment** — 45% cumulative _(ITA s 211)_ - **15 December — 3rd instalment** — 75% cumulative _(ITA s 211)_ - **15 March — 4th instalment** — 100% cumulative _(ITA s 211)_ - **Threshold** — Tax liability ≥ Rs. 10,000 (after TDS) _(ITA s 208)_ - **Presumptive Taxpayers (44AD/44ADA) — Instalment** — Single payment by 15 March (100%) _(ITA s 211(1)(b))_ - **s 234B (total default)** — 1% per month (simple) on shortfall _(ITA s 234B)_ - **s 234C (instalment deferment)** — 1% per month (simple) on instalment shortfall _(ITA s 234C)_ - **Senior Citizen Exemption — Exempt if** — Resident 60+, NO business/professional income _(ITA s 207)_ - **Senior Citizen Exemption — NOT exempt if** — Senior WITH business/professional income _(ITA s 207)_ - **Challan 280 — Tax applicable code** — 0021 (IT — Other than Companies) _(ITNS 280)_ - **Challan 280 — Type of payment code** — 100 (Advance Tax) _(ITNS 280)_ ## Section 1 -- Quick reference Read this whole section before computing anything. - **Country** — India - **Jurisdiction Code** — IN - **Primary Legislation** — Income-tax Act, 1961, Sections 207-211 (advance tax liability and computation); Sections 234B, 234C (interest on default/deferment) - **Supporting Legislation** — Income-tax Act, 1961, s. 44AD, s. 44ADA (presumptive taxation); s. 190-194 (TDS provisions); Income-tax Act, 2025 ss. 423-426 (replacement provisions effective AY 2027-28 onward) - **Tax Authority** — Central Board of Direct Taxes (CBDT), Income Tax Department - **Filing Portal** — https://www.incometax.gov.in - **Tax Year** — Financial Year 2025-26 (Assessment Year 2026-27) - **Currency** — INR only - **Advance Tax Threshold** — Rs. 10,000 net after TDS/TCS - **Contributor** — Open Accountants community - **Validated By** — Pending -- requires sign-off by Indian CA (Chartered Accountant) - **Validation Date** — Verified by Mayur Deokar (615638) on 2026-06-06 - **Skill Version** — 2.0 - **Confidence Coverage** — Tier 1: instalment schedule, interest calculation, threshold, presumptive single instalment, Challan 280 procedure. Tier 2: TDS credit netting, capital gains timing, revised estimates mid-year. Tier 3: international income interactions, DTAA credit timing, reassessment interest disputes. **Quick reference field table** | Field | Value | | --- | --- | | Country | India | | Jurisdiction Code | IN | | Primary Legislation | Income-tax Act, 1961, Sections 207-211 (advance tax liability and computation); Sections 234B, 234C (interest on default/deferment) | | Supporting Legislation | Income-tax Act, 1961, s. 44AD, s. 44ADA (presumptive taxation); s. 190-194 (TDS provisions); Income-tax Act, 2025 ss. 423-426 (replacement provisions effective AY 2027-28 onward) | | Tax Authority | Central Board of Direct Taxes (CBDT), Income Tax Department | | Filing Portal | https://www.incometax.gov.in | | Tax Year | Financial Year 2025-26 (Assessment Year 2026-27) | | Currency | INR only | | Advance Tax Threshold | Rs. 10,000 net after TDS/TCS | | Contributor | Open Accountants community | | Validated By | Pending -- requires sign-off by Indian CA (Chartered Accountant) | | Validation Date | Verified by Mayur Deokar (615638) on 2026-06-06 | | Skill Version | 2.0 | | Confidence Coverage | Tier 1: instalment schedule, interest calculation, threshold, presumptive single instalment, Challan 280 procedure. Tier 2: TDS credit netting, capital gains timing, revised estimates mid-year. Tier 3: international income interactions, DTAA credit timing, reassessment interest disputes. | **Instalment schedule (regular assessees)** | Instalment | Due Date | Cumulative % | Incremental % | | --- | --- | --- | --- | | 1st | 15 June | 15% | 15% | | 2nd | 15 September | 45% | 30% | | 3rd | 15 December | 75% | 30% | | 4th | 15 March | 100% | 25% | - **Presumptive taxation (s. 44AD / 44ADA)** — Single instalment, 100% due by 15 March. **Interest rates** | Section | Rate | Type | | --- | --- | --- | | s. 234B (total default) | 1% per month (simple) | On shortfall between assessed tax and advance tax paid | | s. 234C (instalment deferment) | 1% per month (simple) | On instalment shortfall | **Presumptive taxation schemes** | Scheme | Applies To | Deemed Profit Rate | | --- | --- | --- | | Section 44AD | Eligible businesses, turnover up to Rs. 2 crore (Rs. 3 crore if digital >= 95%) | 8% of turnover (6% for digital receipts) | | Section 44ADA | Eligible professionals, gross receipts up to Rs. 50 lakh (Rs. 75 lakh if digital >= 95%) | 50% of gross receipts | **Conservative defaults** | Ambiguity | Default | | --- | --- | | Unknown tax regime | New regime (s. 115BAC, default from AY 2024-25) | | Unknown TDS credits | $0 (full advance tax required) | | Unknown business vs salary split | Treat all as business income (advance tax applies) | | Unknown senior citizen status | Not exempt (advance tax required) | ## Section 2 -- Required inputs and refusal catalogue ### Required inputs - **Required inputs list** — Before computing any advance tax figure, you MUST know: 1. Age as of April 1 of the assessment year -- senior citizen exemption may apply. 2. Nature of income -- business/profession, capital gains, salary, rental, other sources. 3. Has the client opted for presumptive taxation (s. 44AD / 44ADA)? -- changes the instalment schedule. 4. Estimated total income for the financial year -- needed to compute estimated tax liability. 5. Tax regime chosen: old or new (s. 115BAC)? -- affects tax rates and available deductions. 6. TDS already deducted or expected during the year -- reduces advance tax obligation. 7. TCS credits available -- also reduces advance tax obligation. 8. Any brought-forward losses or unabsorbed depreciation? -- affects taxable income estimate. If estimated total tax liability after TDS/TCS is less than Rs. 10,000, STOP. No advance tax is due. ### Refusal catalogue - **R-IN-AT-1 -- International income with DTAA credit timing** — Trigger: client has income from multiple countries and asks about advance tax credit for foreign taxes under a Double Tax Avoidance Agreement. Message: "DTAA credit timing in advance tax computation is complex and outside this skill's scope. Please escalate to a Chartered Accountant with international tax expertise." - **R-IN-AT-2 -- Reassessment interest disputes** — Trigger: client is disputing interest levied under s. 234B or s. 234C following a reassessment. Message: "Interest disputes under reassessment proceedings require representation before the assessing officer. This is outside this skill's scope. Please escalate to a Chartered Accountant." - **R-IN-AT-3 -- Income-tax Act, 2025 transitional queries spanning both regimes** — Trigger: client asks about advance tax provisions that span both the 1961 Act and the 2025 Act. Message: "The Income-tax Act, 2025 (effective 1 April 2026) replaces ss. 234B/234C with new sections 424/425. For FY 2025-26, the 1961 Act applies. Queries spanning both regimes should be escalated to a Chartered Accountant." ## Section 3 -- Payment pattern library This is the deterministic pre-classifier for bank statement entries related to advance tax. Match by case-insensitive substring on the counterparty name or transaction description. ### 3.1 Advance tax payments via Challan 280 **Advance tax payments via Challan 280 patterns** | Pattern | Treatment | Notes | | --- | --- | --- | | CHALLAN 280, ITNS 280 | ADVANCE TAX PAYMENT | Verify Type of Payment code is 100 (Advance Tax) | | INCOME TAX, INCOMETAX.GOV | ADVANCE TAX PAYMENT | e-Pay Tax portal payment -- confirm challan type | | TIN-NSDL, PROTEAN (formerly TIN-NSDL) | ADVANCE TAX PAYMENT | Online challan generation | | SBI TAX, STATE BANK TAX | ADVANCE TAX PAYMENT | Bank-based challan payment | | HDFC TAX, ICICI TAX, AXIS TAX | ADVANCE TAX PAYMENT | Net banking tax payment | ### 3.2 TDS deductions visible in bank statements **TDS deductions patterns** | Pattern | Treatment | Notes | | --- | --- | --- | | TDS, TAX DEDUCTED AT SOURCE | TDS CREDIT | Reduces advance tax obligation; verify in Form 26AS/AIS | | TDS U/S 194J, TDS U/S 194C | TDS CREDIT | Professional/contractor TDS -- common for self-employed | | TDS U/S 194N | TDS ON CASH WITHDRAWAL | May not relate to income; verify | ### 3.3 Self-assessment tax (separate from advance tax) **Self-assessment tax patterns** | Pattern | Treatment | Notes | | --- | --- | --- | | SELF ASSESSMENT TAX, SAT PAYMENT | SELF-ASSESSMENT (NOT ADVANCE TAX) | Challan 280 with Type 300 -- paid at time of filing ITR; NOT counted as advance tax for s. 234B/C interest | ### 3.4 Refund receipts **Refund receipts patterns** | Pattern | Treatment | Notes | | --- | --- | --- | | CPC REFUND, INCOME TAX REFUND, NEFT-CPC | TAX REFUND | Refund of excess advance tax or TDS; verify against ITR | ## Section 4 -- Advance tax computation rules ### 4.1 Who must pay advance tax (Tier 1) - **Legislation** — Income-tax Act, 1961, s. 207, s. 208 _(Income-tax Act, 1961, s. 207, s. 208)_ **Who must pay advance tax table** | Category | Advance Tax Required? | | --- | --- | | Self-employed with estimated tax liability >= Rs. 10,000 | YES | | Salaried with other income and estimated tax >= Rs. 10,000 | YES | | Senior citizen (60+) with NO business/professional income | NO (exempt under s. 207) | | Senior citizen (60+) WITH business/professional income | YES | | Presumptive assessee (s. 44AD / 44ADA) | YES, but single instalment | | Any person with estimated tax liability < Rs. 10,000 | NO | - **Threshold calculation** — estimated_tax_liability = tax_on_estimated_total_income + surcharge + cess net_advance_tax_due = estimated_tax_liability - TDS_credits - TCS_credits if net_advance_tax_due < 10,000: advance_tax_required = NO else: advance_tax_required = YES _(Income-tax Act, 1961, s. 207, s. 208)_ - **Net threshold note** — The Rs. 10,000 threshold is on the NET tax after TDS/TCS credits, not gross tax. ### 4.2 Interest under s. 234B -- default in payment (Tier 1) - **Legislation** — Income-tax Act, 1961, s. 234B _(Income-tax Act, 1961, s. 234B)_ - **Applicability** — Section 234B applies when total advance tax paid is less than 90% of assessed tax. _(Income-tax Act, 1961, s. 234B)_ - **Interest 234B formula** — if advance_tax_paid < (assessed_tax x 90%): shortfall = assessed_tax - advance_tax_paid interest_234B = shortfall x 1% x number_of_months _(Income-tax Act, 1961, s. 234B)_ - **Rate and period** — Rate: 1% per month or part of month (simple interest). Period: from 1 April of assessment year to date of self-assessment tax payment or regular assessment. Any part of a month counts as a full month. _(Income-tax Act, 1961, s. 234B)_ ### 4.3 Interest under s. 234C -- deferment of instalments (Tier 1) - **Legislation** — Income-tax Act, 1961, s. 234C _(Income-tax Act, 1961, s. 234C)_ - **Trigger condition** — Interest is triggered when advance tax paid by the due date is less than the shortfall trigger percentage: **s. 234C shortfall trigger table** | Due Date | Shortfall Trigger | Interest Period | | --- | --- | --- | | 15 June | Paid less than 12% of assessed tax | 3 months | | 15 September | Paid less than 36% of assessed tax | 3 months | | 15 December | Paid less than 75% of assessed tax | 3 months | | 15 March | Paid less than 100% of assessed tax | 1 month | - **Tolerance explanation** — The shortfall triggers (12%, 36%) include an 80% tolerance on the cumulative targets (15% x 80% = 12%, 45% x 80% = 36%), except December (75% actual) and March (100% actual). - **s. 234C instalment formulas** — # June instalment if paid_by_jun15 < (assessed_tax x 12%): shortfall = (assessed_tax x 15%) - paid_by_jun15 interest = shortfall x 1% x 3 # September instalment if paid_by_sep15 < (assessed_tax x 36%): shortfall = (assessed_tax x 45%) - paid_by_sep15 interest = shortfall x 1% x 3 # December instalment if paid_by_dec15 < (assessed_tax x 75%): shortfall = (assessed_tax x 75%) - paid_by_dec15 interest = shortfall x 1% x 3 # March instalment if paid_by_mar15 < (assessed_tax x 100%): shortfall = (assessed_tax x 100%) - paid_by_mar15 interest = shortfall x 1% x 1 _(Income-tax Act, 1961, s. 234C)_ - **Presumptive assessee interest note** — For presumptive assessees: only one instalment by 15 March, only 1 month interest if short. No June/September/December shortfall applies. - **Capital gains / lottery exemption** — Capital gains / lottery exemption: if a shortfall is caused by capital gains, lottery, or first-time business income, the shortfall is ignored for s. 234C provided the assessee pays in remaining instalments or by 31 March. ### 4.4 Interaction with TDS credits (Tier 1) - **Legislation** — Income-tax Act, 1961, s. 190, s. 199, s. 209 _(Income-tax Act, 1961, s. 190, s. 199, s. 209)_ - **TDS treatment** — TDS already deducted reduces estimated tax liability before computing advance tax instalments. TDS is treated as advance tax paid on the date it was deducted (for s. 234C) or as reduction from assessed tax (for s. 234B). Self-assessment tax (s. 140A) is NOT counted as advance tax for interest calculation. ### 4.5 New tax regime interaction (Tier 1) - **Legislation** — Income-tax Act, 1961, s. 115BAC _(Income-tax Act, 1961, s. 115BAC)_ - **Regime impact** — The regime choice (old vs new) affects the estimated tax liability and therefore the advance tax quantum. It does NOT change the instalment schedule or interest provisions. ## Section 5 -- Challan 280 payment procedure Income-tax Act, 1961; CBDT Notification ### Online payment steps (Tier 1) - **Steps** — 1. Log in to https://www.incometax.gov.in or use authorised bank net banking 2. Select "e-Pay Tax" under "e-File" menu 3. Select Challan No. ITNS 280 4. Select Tax Applicable: (0021) Income Tax (Other than Companies) 5. Select Type of Payment: (100) Advance Tax 6. Enter PAN, assessment year (AY), address, and amount 7. Select bank and complete payment via net banking / debit card / UPI 8. Download and save the Challan Receipt (BSR code + challan serial number + date) **Key challan details** | Field | Value | | --- | --- | | Challan Number | ITNS 280 | | Tax Applicable Code | 0021 (Income Tax -- Other than Companies) | | Type of Payment Code | 100 (Advance Tax) | | Assessment Year | AY following the FY (e.g., FY 2025-26 = AY 2026-27) | - **Retention note** — Always retain the challan receipt. The BSR code and challan serial number are required when filing ITR. ## Section 6 -- Senior citizen exemption and penalties ### 6.1 Senior citizen exemption (Tier 1) - **Legislation** — Income-tax Act, 1961, s. 207, proviso _(Income-tax Act, 1961, s. 207, proviso)_ **Senior citizen exemption table** | Condition | Advance Tax Obligation | | --- | --- | | Resident individual 60+ with NO business/professional income | EXEMPT | | Resident individual 60+ WITH business/professional income | NOT exempt -- must pay | | Non-resident senior citizen | NOT exempt -- must pay | - **Exempt interest note** — If exempt, no interest under s. 234B or s. 234C applies. ### 6.2 Penalties (Tier 1) **Penalties table** | Penalty Type | Rate | Legislation | | --- | --- | --- | | Interest on total default (s. 234B) | 1% per month (simple) on shortfall | s. 234B | | Interest on instalment deferment (s. 234C) | 1% per month (simple) on instalment shortfall | s. 234C | | Penalty for non-payment of demand | Up to amount of tax in arrears | s. 221 (discretionary) | - **Simultaneous application** — Interest under s. 234B and s. 234C can both apply simultaneously. Interest is mandatory and non-discretionary -- the Assessing Officer has no power to waive or reduce it. ## Section 7 -- Edge case registry ### EC1 -- Income primarily from capital gains, unforeseeable (Tier 1) Situation: Client earns most income from capital gains realised in January. No advance tax paid in June or September. Resolution: Capital gains exemption under s. 234C applies. No interest on June/September shortfall caused by capital gains income. Client must pay advance tax on capital gains in December or March instalment. s. 234B may still apply if total advance tax is short by year-end. ### EC2 -- TDS covers most of the liability (Tier 1) Situation: Client is a consultant with Rs. 15,00,000 income. TDS at 10% = Rs. 1,50,000. Estimated total tax = Rs. 1,80,000. Net advance tax = Rs. 30,000. Resolution: Advance tax required (Rs. 30,000 > Rs. 10,000). Pay in four instalments. TDS credit reduces the base for interest computation. ### EC3 -- Presumptive assessee who also has capital gains (Tier 2) Situation: Client uses s. 44AD for business income but also has capital gains. Resolution: Presumptive instalment rule (single payment by 15 March) applies to the business income portion. Capital gains portion may require separate advance tax in the instalment following realisation. Flag for reviewer. ### EC4 -- Senior citizen with rental and business income (Tier 1) Situation: Client aged 65, has rental income of Rs. 6,00,000 and freelance consulting income of Rs. 2,00,000. Resolution: Senior citizen exemption does NOT apply because the client has business/professional income. Full advance tax schedule applies on all income. ### EC5 -- Revised income estimate mid-year (Tier 1) Situation: Client's income estimate increases significantly after September. Resolution: Recalculate and pay the shortfall in December and March instalments. s. 234C interest applies only to the extent of shortfall at each instalment date based on final assessed tax. ### EC6 -- Advance tax paid but ITR not filed (Tier 2) Situation: Client paid all advance tax instalments but did not file ITR by the due date. Resolution: s. 234B interest does not apply (advance tax was paid). However, s. 234A interest (late filing) applies separately at 1% per month. Flag for reviewer. ### EC7 -- NRI with Indian business income (Tier 2) Situation: Non-resident Indian with business income from India through a fixed place of business. Resolution: Advance tax provisions apply to NRIs. The senior citizen exemption does NOT apply to non-residents. Flag for reviewer -- confirm DTAA relief availability. ### EC8 -- Transition to Income-tax Act, 2025 (Tier 2) Situation: Client asks about advance tax provisions under the new Income-tax Act, 2025. Resolution: The Income-tax Act, 2025 (effective 1 April 2026) replaces ss. 234B/234C with new sections 424/425. For FY 2025-26 (AY 2026-27), the 1961 Act still applies. Flag for reviewer. ## Section 8 -- Reviewer escalation protocol When a Tier 2 situation is identified: ``` REVIEWER FLAG Tier: T2 Client: [name] Situation: [description] Issue: [what is ambiguous] Options: [possible treatments] Recommended: [most likely correct treatment and why] Action Required: Chartered Accountant must confirm before advising client. ``` When a Tier 3 situation is identified: ``` ESCALATION REQUIRED Tier: T3 Client: [name] Situation: [description] Issue: [outside skill scope] Action Required: Do not advise. Refer to Chartered Accountant. Document gap. ``` ## Section 9 -- Test suite ### Test 1 -- Standard self-employed, four instalments Input: Age 40, estimated total income Rs. 12,00,000 (business), new tax regime, no TDS, no presumptive scheme. Expected output: Tax approx Rs. 1,17,000 (after rebate/cess). Advance tax: Rs. 17,550 by Jun 15, Rs. 52,650 cumulative by Sep 15, Rs. 87,750 cumulative by Dec 15, Rs. 1,17,000 by Mar 15. ### Test 2 -- Below threshold Input: Age 35, estimated total income Rs. 8,00,000 (business), new tax regime, TDS of Rs. 25,000. Expected output: Tax approx Rs. 32,500. Net after TDS = Rs. 7,500. Below Rs. 10,000 threshold. NO advance tax required. ### Test 3 -- Presumptive taxation (s. 44AD) Input: Age 45, business turnover Rs. 1,50,00,000, presumptive income at 8% = Rs. 12,00,000, no TDS. Expected output: Single instalment of 100% advance tax due by 15 March. No June/September/December obligations. ### Test 4 -- Senior citizen exempt Input: Age 67, resident, income from house property Rs. 5,00,000 + interest Rs. 3,00,000. NO business income. Expected output: Senior citizen exemption applies. NO advance tax required. ### Test 5 -- Senior citizen NOT exempt (has business income) Input: Age 65, resident, freelance income Rs. 10,00,000. Tax liability above Rs. 10,000. Expected output: Exemption does NOT apply. Full four-instalment schedule required. ### Test 6 -- s. 234B interest calculation Input: Assessed tax Rs. 5,00,000. Total advance tax paid Rs. 3,00,000. Self-assessment tax paid on July 25 of AY. Expected output: Shortfall = Rs. 2,00,000. 90% threshold = Rs. 4,50,000. Advance tax paid < 90%, so s. 234B applies. Interest = Rs. 2,00,000 x 1% x 4 months (Apr, May, Jun, Jul) = Rs. 8,000. ### Test 7 -- s. 234C interest on missed June instalment Input: Assessed tax Rs. 4,00,000. Paid Rs. 0 by Jun 15. Paid Rs. 1,80,000 by Sep 15. Expected output: Jun shortfall trigger: 12% of Rs. 4,00,000 = Rs. 48,000. Paid Rs. 0 < Rs. 48,000. Interest base = (15% x Rs. 4,00,000) - Rs. 0 = Rs. 60,000. Interest = Rs. 60,000 x 1% x 3 = Rs. 1,800. ### Test 8 -- TDS covers liability Input: Consultant income Rs. 20,00,000. TDS at 10% = Rs. 2,00,000. Estimated tax = Rs. 2,10,000. Net = Rs. 10,000. Expected output: Net advance tax exactly Rs. 10,000. At threshold -- s. 208 says "exceeds Rs. 10,000", so at exactly Rs. 10,000, NO advance tax required. ## Section 10 -- Prohibitions and disclaimer ### Prohibitions - **Prohibitions list** — - NEVER compute advance tax without confirming estimated total income and applicable tax regime - NEVER ignore the Rs. 10,000 threshold -- always check net tax after TDS/TCS before prescribing advance tax - NEVER apply the senior citizen exemption to a client with business/professional income - NEVER apply the senior citizen exemption to non-resident individuals - NEVER tell a presumptive assessee they must pay four instalments -- single instalment by 15 March applies - NEVER compute s. 234B interest using gross tax -- always reduce by TDS/TCS credits first - NEVER waive or suggest waiver of s. 234B/234C interest -- it is mandatory and non-discretionary - NEVER conflate self-assessment tax (s. 140A) with advance tax -- they are separate for interest computation - NEVER forget that s. 234B and s. 234C can BOTH apply simultaneously to the same assessee - NEVER present advance tax figures as definitive -- always label as estimated and advise the client to consult their CA for final computation ### Disclaimer This skill and its outputs are provided for informational and computational purposes only and do not constitute tax, legal, or financial advice. 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