Income-tax Act 2025 vs 1961

Why a new Act

The 1961 Act, after 64 years and ~70 amendment cycles, had become a tangle: 47 chapters, ~880 sections, several layers of provisos, and case-law overlays that often contradicted plain reading. The 2025 Act is a structural rewrite — same fundamental tax architecture, but cleaner organization, simpler drafting, and tabular presentation of slabs, rates, and computational rules.

Old vs new — the headline differences

What's not changing: the basic charging structure, residency tests, head-of-income classification, and the broad rate framework all carry forward. This is a rewrite, not a tax-policy reset.

Applicability — the dates that matter

Transition provisions — what carries over

Section 530 of the new Act (the saving / repeal clause) protects continuity. The substance:

• Pending assessments & reassessments initiated under the 1961 Act continue under the old Act until disposal.
• Appeals & revisions filed before 1 April 2026 continue under the 1961 Act framework.
• Carry-forward losses (business loss, capital loss, depreciation, MAT/AMT credit) computed under the 1961 Act are deemed valid under the 2025 Act for the unexpired carry-forward period.
• Notices, orders, refund claims issued or pending under the 1961 Act continue under that Act.
• Approvals & registrations (12A/12AB, 80G, 10(23C), 35AC, etc.) continue, with a renewal cycle under the equivalent 2025 Act sections at expiry.
• Prosecutions and penalties for offences committed under the 1961 Act continue under the old Act — repeal does not extinguish liability.

What's new in drafting that you'll feel immediately

Three drafting changes will hit your daily tax workflow from FY 2026-27:

1. "Tax Year" replaces "Previous Year" / "Assessment Year". A single defined term covers both the income-earning period and the assessment period. ITR forms, TDS certificates, demand notices — all switch to the new label.
2. Section numbers change. Section 80C becomes a different number; Section 44AB (tax audit) lands at a new reference. CA firms, ITR utilities, ERP tax modules, and templated client letters all need a section-mapping refresh. We're maintaining a 1961 → 2025 cross-reference sheet for client decks.
3. Tables instead of provisos. Many computational rules — depreciation, presumptive taxation thresholds, capital gains, surcharge — are now in indexed tables inside schedules. Faster to read; easier to amend in future Finance Acts.

What businesses should be doing this year

For FY 2025-26, you continue under the 1961 Act — no change. But the year ahead has three parallel tracks:

• Filing FY 2025-26 ITR / tax audit under the 1961 Act (due Jul–Oct 2026)
• Preparing FY 2026-27 systems for the 2025 Act — ERP tax codes, TDS section maps, payroll software, ITR mapping templates need updates by 1 April 2026
• Cleaning up legacy — close out old appeals, sort pending refunds, and document carry-forward positions before the section-numbering change blurs audit trails

Bottom line

The 2025 Act is a clean-up, not a re-pricing. Tax incidence on most taxpayers is broadly unchanged. The work this year is administrative: re-section your templates, re-train teams on the new vocabulary ("Tax Year"), and audit your carry-forward register before transition. The CA / tax software vendors are publishing 1961 → 2025 section maps — get one and embed it in your finance manual.

Disclaimer: This article reflects the position of the Income-tax Act, 2025 as enacted, and is intended as general advisory commentary. Specific section numbers, exemption thresholds and procedural rules may evolve through CBDT notifications and Finance Acts. For matter-specific advice, please consult a qualified Chartered Accountant.