Section Mapping explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
This cheat sheet maps the most-used Income-tax Act, 1961 sections — charge, residence, the five heads, key deductions and TDS — to their successor provisions in the Income-tax Act, 2025. Where a new clause number is still settling, the provision is described by function rather than a possibly-wrong precise number.
Overview
The single biggest day-to-day friction after the 2025 Act is that familiar section numbers have moved. Practitioners who have said "80C" or "section 6" for years now need a translation aid. This cheat sheet groups the high-frequency provisions so you can find the 2025-Act equivalent quickly.
What the Old Act Said
The 1961 Act placed definitions in section 2, the charge in section 4, residence in section 6, scope of total income in section 5, the heads in section 14, salary in 15-17, house property in 22-27, business/profession in 28-44, capital gains in 45-55, other sources in 56-59, deductions in 80C-80U, and TDS/TCS in 190-206CCA. Everyone learned these landmarks by heart.
What the New Act 2025 Changes
The 2025 Act keeps the same logical order — charge, residence, heads, computation, deductions, machinery — but re-numbers and consolidates. Much detail moves into schedules and tables. The mapping below is a working guide; always confirm the exact current clause against the official mapping before quoting it in a filing or opinion.
Old → New Mapping
| 1961 Act | Subject | 2025 Act position |
|---|---|---|
| s.2 | Definitions | Consolidated definitions clause |
| s.4 | Charge of income-tax | Charging provision (retained) |
| s.5 | Scope of total income | Scope provision (retained) |
| s.6 | Residence | Re-drafted residence rules |
| s.14–17 | Heads / Salary | Heads clause + salary computation |
| s.22–27 | House property | House-property computation |
| s.28–44 | Business/Profession | Business-income computation |
| s.44AD/44ADA/44AE | Presumptive | Presumptive-taxation provisions |
| s.45–55 | Capital gains | Capital-gains computation |
| s.56–59 | Other sources | Other-sources computation |
| s.80C–80U | Deductions | Consolidated deductions chapter |
| s.139 | Return of income | Return-filing provision |
| s.190–206CCA | TDS/TCS | Re-grouped withholding-tax code |
Treat every "2025 Act position" above as the functional successor. Where the official number is not yet certain to you, cite the provision by what it does and note the old section it replaces.
Practical Impact / Examples
Drafting a computation for a client with ₹1,50,000 of eligible savings, you still claim the 80C-type deduction — just under its new consolidated clause. A residence question for someone in India 190 days still runs through the re-drafted successor to section 6. The math is identical; only the citation changes.
Transition Tips
- Pin this cheat sheet inside your working-paper template.
- Cross-check any number you quote in a return or notice against the official mapping.
- Keep old section numbers on legacy-year files to match older notices.
- Re-train juniors on the new landmarks early to avoid mis-citations.
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Key Facts About Section Mapping
- Applies in: All states across India, under the relevant central law.
- Mode: Mostly online via the official government portal.
- Typical timeline: Ranges from a few days to a few weeks depending on the case.
- Non-compliance: May attract penalties, interest or late fees.
- Expert help: TaxClue completes the entire process end to end for you.
Is there an official section-mapping table?
The government has issued mapping references alongside the 2025 Act. Use them as the authority; a cheat sheet like this is a quick working aid, not a substitute.
Did section 80C survive with the same number?
The 80C-type deductions survive in substance but sit in a consolidated deductions chapter under new numbering. Always confirm the current clause number before quoting it.
Over 90% of compliance penalties in India arise from missed due dates — timely handling can save businesses thousands of rupees each year.
Section Mapping: a key compliance topic in Indian tax and corporate law that businesses and individuals must understand to remain compliant.
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Why This Matters
Staying compliant with Indian regulations protects your business from penalties, interest and unnecessary legal trouble. It is always wise to maintain proper records and documentation so that any future scrutiny can be handled smoothly. Rules and thresholds in income tax are revised periodically, so it helps to review your obligations at the start of each financial year. Professional guidance from a qualified CA, CS or advocate ensures that filings are accurate and submitted well before the due date.