Income Tax Act, 2025 — what individual taxpayers should know

The Income Tax Act, 2025 replaces the venerable Income Tax Act, 1961 — a statute that had grown, over six decades, into a 900-section behemoth riddled with provisos, explanations and cross-references. The new Act is a structural rewrite, not a tax rate cut. For most individual taxpayers, the practical answer to "what changes for me?" is: not as much as you might fear, but enough that it is worth knowing the basics.

Why a new Act

The 1961 Act, as amended every year through Finance Acts, became one of the most-litigated tax statutes in the world. The intention behind the 2025 Act is consolidation, simplification and modernisation: shorter sections, plainer language, fewer provisos, and removal of obsolete provisions.

What is largely the same

• Tax rates and slabs for individuals continue broadly as announced in successive Finance Acts. The new and old regime structure (introduced under the 1961 Act) carries forward with similar economic effect.
• Heads of income — Salary, House Property, Business / Profession, Capital Gains and Other Sources — remain the same five.
• Deductions for individuals in the new regime remain limited; in the old regime, the framework of Chapter VI-A continues, with section numbering rationalised.
• ITR forms and the e-filing portal continue to be the primary mode of filing returns, with form numbers retained.

What is structurally different

• Section numbering has been comprehensively rationalised. Familiar references such as "143(1)", "139(9)", "148" or "271AAC" map to new section numbers under the 2025 Act. For a transition period, both numbering systems will be cited in notices, judgments and CBDT circulars.
• Drafting style — the new Act uses tables, schedules and shorter sentences. Several long sections of the 1961 Act have been split into multiple shorter sections for readability.
• Procedural provisions have been consolidated. Notices, assessments, appeals and recovery now sit in cleaner chapters with reduced cross-referencing.
• Faceless framework — assessment, appeals and penalty proceedings under faceless schemes are now codified in the body of the Act rather than being introduced through annual notifications.

What this means for income tax notices

If you have an open assessment, scrutiny or appeal for any AY up to and including 2025-26, the Department will continue to refer to the 1961 Act provisions in correspondence. From AY 2026-27 onwards, new notices will primarily cite the 2025 Act sections, often with a parenthetical reference to the corresponding 1961 Act section for clarity.

For the next two to three years, expect to see notices that look like this: "…issued under Section [new] of the Income Tax Act, 2025, corresponding to Section 143(2) of the Income Tax Act, 1961…"

What you should do as a taxpayer

1. Do not panic about the change. Your historical ITR data, demand and refund records on the income tax portal carry forward.
2. Watch the AY when reading any new notice. The applicable Act follows the AY: AY 2026-27 onwards is governed by the 2025 Act.
3. Keep your CA's contact handy for at least two cycles. The first scrutiny notices issued under the 2025 Act will need careful reading.