Income Tax Act 2025 Section Mapping, Old 1961 to New Table
This guide explains the re-numbering and re-organization of provisions from the Income Tax Act, 1961 into the Income Tax Act, 2025. You will learn which familiar 1961-section numbers map to the new 2025-section numbers for key provisions, how chapters have been reorganised around modern headings (Preliminary, Basis of Charge, Heads of Income, Computation, Capital Gains, Deductions, Returns, etc.), and how to use the mapping when reading old commentary, compliance checklists or legacy tax opinions. For practitioners, taxpayers and corporate tax teams this mapping matters because statutory references in rulings, contracts and internal policies still point to 1961 section numbers. Knowing the equivalent 2025 section makes it quicker to locate the provision in the new Act, confirm applicability, and update templates and documentation. This guide focuses on the primary, directly traceable mappings: short title and commencement, core definitions, basis of charge and residence rules, heads of income and their constituent sections, computation of income, capital gains, deductions and key procedural provisions like return of income. Where the 2025 Act introduces consolidated or retitled chapter headings, we show which 1961 sections are preserved under the new numbering so you can cross-reference with confidence. Use the included mapping table for fast lookup, and read the accompanying explanations to understand practical implications for compliance, tax planning and drafting.
Why is the Income Tax Act being restructured?
Law reform projects like a restructured Income Tax Act typically aim to present existing law in a clearer, more logical order while keeping substantive tax policy intact. In the case of the 2025 Act, familiar provisions from the 1961 Act have been regrouped under chapter headings such as Preliminary, Basis of Charge, Heads of Income, Computation of Total Income, Capital Gains, Deductions, and Return of Income. This helps readers find related rules together (for example, gathering all rules on heads of income or all capital gains rules in one place) rather than searching across dispersed sections.
For users already accustomed to the Income Tax Act, 1961, a complete mapping between old and new section numbers is essential. Courts, contracts and tax opinions still reference 1961 section numbers; until all secondary material is updated, cross-referencing avoids misinterpretation. The mapping also simplifies compliance updates: tax teams can systematically replace 1961 citations with 2025 citations in manuals, client deliverables and electronic templates.
Practically, the restructure conserves substance but changes form, definitions (section 2 in both Acts), the short title and commencement (section 1 in both Acts) and many core charging provisions retain clear equivalents. Knowing those exact equivalences reduces risk when relying on precedent, enables faster legal research, and supports operational tasks such as updating ERP tax masters and standard operating procedures.
Income Tax Act 2025 v/s Income Tax Act 1961 - Mapping Table (Selected core provisions)
| Provision | Sections of Income Tax Act, 2025 | Sections of Income Tax Act, 1961 |
|---|---|---|
| Short title, extent and commencement | 1 | 1 |
| Definitions | 2 | 2 |
| Definition of “tax year” | 3 | 3 |
| Charge of income-tax | 4 | 4 |
| Scope of total income | 5 | 5 |
| Residence in India. | 6 | 6 |
| Income deemed to be received and dividend deemed to be income in a tax year | 7 | 7 |
| Income on receipt of capital asset or stock in trade by specified person from specified entity | 8 | 9B |
| Income deemed to accrue or arise in India | 9[Read with Schedule I] | 9 |
| Apportionment of income between spouses governed by Portuguese Civil Code | 10 | 5A |
| A. Incomes not to be included in total income | 11 | 10 |
| B. Incomes not to be included in total income of political parties and electoral trusts | 12 | 13A |
| Heads of income | [13-14] | 14 |
| Salaries | 15 | 15 |
| Income from house property | 20 | 22 |
| Profits and gains of business or profession | [26-66] | 28 |
| Capital gains | [67-91] | 45 |
| Income from other sources | 92 | 56 |
| Transfer of income without transfer of assets | 96 | 60 |
| Total income | 101 | 66 |
| Set off of losses under same head of income | 108 | 70 |
| Carry forward and set off of business loss | 112 | 72 |
| Deductions to be made in computing total income | 122 | 80A |
| Deduction for life insurance premia, deferred annuity, contributions to provident fund, etc. | 123[Read with Schedule XV] | 80C |
| Return of income | Chapter XV - Return of Income |
Chapter-level summary: how provisions are grouped in 2025
The 2025 Act organises provisions under chapter headings that mirror the lifecycle of tax computation. Chapter I (Preliminary) contains the short title and core definitions, section 1 and section 2 correspond directly to the same sections in the 1961 Act, and section 3 retains the definition of tax year. Chapter II (Basis of Charge) sets out the charge of income-tax and foundational location and residence rules, sections 4 to 10 map to the 1961 charge and residence rules, with section 9 signalling income deemed to accrue or arise in India (read with Schedule I).
Chapters III and IV in the 2025 Act cover incomes excluded from total income and the computation of total income under the various heads. Chapter III contains sections on incomes not included in total income (section 11) and special exclusions for political entities (section 12). Chapter IV consolidates the heads of income and the rules for computing income under each head; heads such as salaries (section 15), house property (section 20) and business or profession (sections 26–66) map to the long-established structure of the 1961 Act.
Specialised topics are similarly grouped: Chapter V deals with income of other persons included in an assessee’s total income (mapping to sections like 64 in the 1961 Act), Chapter VI covers aggregation, and Chapter VII focuses on set-off and carry forward of losses (sections 108–119 map to 1961 provisions such as sections 70–79A). Capital gains are consolidated in Chapter E (sections 67–91) and income from other sources appears in sections 92–95, consistent with the 1961 Act’s major divisions.
How to use the mapping in practice
When you encounter an old reference to a 1961 section (for example, section 80C or section 45), use the mapping table to locate the corresponding 2025 section (123[Read with Schedule XV] for 80C; capital gains are now in 67–91 corresponding to 45). Update internal documents, tax opinions and template clauses by replacing the 1961 citation with the 2025 citation and noting the schedule read‑with references where applicable so that readers can find any linked schedules.
For compliance teams updating software or ERP tax masters, prioritise mappings for sections that are frequently used in payroll, TDS modules, capital gains reporting and deduction computations, the mapping table highlights many of those core provisions (charges, residence, heads of income, capital gains and key deductions). Maintain a log of replaced references and archive the legacy citations for audit trail purposes. When in doubt about substantive changes, consult the full text of the 2025 provision rather than relying solely on numeric mapping; the mapping is a navigation aid, not a substitute for reading the provision.
Frequently Asked Questions
Q: Does the mapping mean substantive tax law has changed? A: The mapping shows where provisions from the 1961 Act sit in the 2025 Act. It documents numbering and chapter reorganisation. To determine whether the substance of a provision has changed you must read the text of the 2025 provision and any read‑with schedules; the mapping itself does not indicate policy change.
Q: Where are deductions like life insurance or contributions to provident funds in the 2025 Act? A: Those deductions are addressed at section 123 in the 2025 Act (read with Schedule XV) and map to section 80C and related provisions in the 1961 Act.
Q: How are capital gains located in the 2025 Act? A: Capital gains provisions are grouped in sections 67–91 of the 2025 Act and correspond to section 45 and adjoining provisions in the 1961 Act; specific special provisions and computation rules are mapped within that range.
This guide gives you a practical starting point to cross-reference key Income Tax Act provisions between the 1961 and 2025 Acts. Use the table for quick lookups, apply the chapter summaries when updating documents, and always verify substantive changes by reading the 2025 provision and its read‑with schedules. If you need a full document-level conversion of specific sections used by your business (payroll, capital gains workflows or deduction clauses), share the list of 1961 sections you rely on and this mapping can be expanded into a custom conversion checklist.
Frequently asked questions
What is the new section number for old Section 80C (deductions like life insurance, PF, etc.)?
The old Section 80C is now renumbered as Section 123 in the Income Tax Act, 2025. Section 123 (read with Schedule XV) covers deductions for life insurance premiums, deferred annuity, contributions to provident funds and similar instruments previously under 80C; related provisions such as 80CCC and 80CCE are consolidated under the same cluster (Sections 123–137). Use Section 123 when referring to these deductions in the 2025 Act and cite the old 80C only if referencing historical provisions or legacy documents.
What is the new section number for old Section 44AB (tax audit requirement)?
The tax-audit provisions previously in Section 44AB are now contained in Section 63 of the Income Tax Act, 2025. Section 63 deals with maintenance of books and the tax audit requirement (formerly Section 44AB), so taxpayers who previously referred to 44AB should now follow compliance and thresholds as laid out under Section 63. Check the exact turnover/profit thresholds and procedural rules in Section 63 and related rules for any changes in limits or formats.
How do I find the new section number for any old Income Tax Act, 1961 section?
Use the complete mapping table that pairs each old 1961 section with its 2025 equivalent to locate the new section number for any legacy provision. The mapping is organised by chapters (e.g., Chapter I Preliminary, Chapter IV Computation of Total Income) and lists correspondences such as Short title (1→1), Definitions (2→2), and many specific mappings like 80C→123 and 44AB→63. If a provision spans schedules or has been split/renamed, consult the table entry that shows 'Read with Schedule' annotations and check the 2025 Act text for amended scope or cross-references.
Why is the Income Tax Act being restructured and sections renumbered in 2025?
The Act has been restructured to modernise, simplify and reorganise provisions for clarity and easier navigation, which resulted in renumbering and regrouping of many sections. The 2025 structure groups related topics into clearer chapters (for example, Chapter VIII consolidates deductions under Sections 122–137) and annotates items to be read with specific schedules, improving coherence between provisions and schedules. Restructuring can also rename or split certain provisions, so taxpayers should rely on the new section numbers and review any substantive changes to scope or thresholds in the 2025 Act text.
Have the basic provisions like Short title, Definitions and Tax Year been renumbered?
No, core preliminary provisions retained their original numbering: Short title, extent and commencement remains Section 1, Definitions remains Section 2, and Definition of 'tax year' remains Section 3 in the 2025 Act, matching the 1961 Act numbering. Similarly, Charge of income-tax (Section 4), Scope of total income (Section 5), and Residence in India (Section 6) keep the same section numbers, which helps in mapping foundational concepts across both Acts. For these foundational sections you can rely on the same section numbers when cross-referencing old and new Acts, but always check for any textual changes in definitions or scope.
How are chapters re-arranged, for example, where are deductions and capital gains now?
In the 2025 Act the chapters have been reorganised: Chapter VIII covers 'Deductions to be made in computing total income' (general and specific deductions fall under Sections 122–137), while Capital Gains are covered in Chapter E (Sections 67–91) under 'Capital Gains'. The mapping table shows detailed one-to-one correspondences for individual provisions (for example, capital gains general provision 45→67, cost of acquisition 55→90, and exemptions like 54EC→85), so you should consult the chapter and specific section number in the 2025 Act for each item. This reorganisation groups related topics together and indicates schedules for linked provisions where applicable.
If a provision was split or moved (for example, income not to be included in total income), how is that shown in the mapping?
When a provision is split or moved, the mapping table indicates the new section and often adds 'Read with Schedule' notes or multiple new section numbers to reflect the change. For instance, incomes not included in total income originally under Section 10 are now listed under Section 11 (read with Schedules II to VII), and political party exemptions originally in 13A appear as Section 12 with Schedule VIII references. Always check the mapping entry for 'Read with Schedule' and then review the 2025 Act text and the referenced schedule to understand the full scope and any new sub-divisions or added conditions.
How should I cite old and new section numbers in legal notices, returns or communications during the transition?
When citing provisions during the transition, list both the new 2025 section number first and the old 1961 section number in parentheses (for example, 'Section 123 (formerly Section 80C)') so that readers using either Act can follow the reference. This approach clarifies which modern provision applies while preserving traceability to legacy documents, and is especially helpful for compliance forms, legal notices, or transitional assessment records. Also reference any relevant schedules (e.g., 'Section 123 read with Schedule XV') when the mapping table indicates schedule links, and confirm whether any substantive changes affect compliance beyond numbering.
Where can I find the new section number for the tax audit threshold or bookkeeping requirement?
The bookkeeping requirement and tax audit provisions that were under Sections 44AA and 44AB (maintenance of books and tax audit) in the 1961 Act are now Section 62 (maintenance of books of account) and Section 63 (Tax Audit) in the 2025 Act. The mapping table lists 'Maintenance of books of account' as 62 and 'Tax Audit' as 63, so refer to these sections in the 2025 Act for current thresholds, record-keeping standards and audit report requirements. Always verify specific turnover, presumptive scheme exceptions or format changes in the 2025 Act text and related rules because restructuring may also update procedural details.
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