Income-tax Act, 2025 Effective from April 2026: Practical Overview
Understand how the Income-tax Act, 2025 applies from 1 April 2026, what changes for taxpayers, and how to keep AY 2026-27 filing separate from Tax Year 2026-27 compliance.
India's income-tax law changed on 1 April 2026. The Income-tax Act, 2025 — which replaces the Income Tax Act, 1961 — came into force that day, bringing with it restructured sections, revised form numbering, and updated compliance terminology. For most taxpayers, the transition surface is wider than just a new law book on the shelf: it affects which section a TDS deductor must cite, which form number appears on a payment challan, and how the department will draft future notices.
This guide is a readiness note for individual and business taxpayers adjusting to this shift. It is not a filing outcome guarantee or a substitute for case-specific advice.
What changed
The new Act restructures, renumbers, and rewrites the provisions of the 1961 Act — it is not an amendment. The tax rates, slabs, and core concepts carry forward substantially, but section references, form numbers, and compliance headings are different. The practical task for every taxpayer right now is to match each return, payment, TDS entry, and notice to the correct law and the correct period.
| Point | Practical meaning |
|---|---|
| 1 | The 2025 Act applies from 1 April 2026 for Tax Year 2026-27 onwards. |
| 2 | AY 2026-27 returns for FY 2025-26 still need the old-year filing context. |
| 3 | Taxpayers should separate return filing, TDS, payments, forms, and old proceedings by date. |
Why it matters now
Two workstreams are running simultaneously for most taxpayers in the current season. The AY 2026-27 return covers FY 2025-26 income and is filed under the Income Tax Act, 1961 framework. Tax Year 2026-27 compliance — advance tax instalments, TDS deductions from April 2026 onwards, and the eventual Tax Year 2026-27 return — is governed by the new 2025 Act.
These two workstreams coexist in the same calendar period, and the same portal hosts both. A taxpayer who carries forward last year's payment challans, TDS section references, or form numbers without checking whether they still apply under the 2025 Act is operating with a compliance blind spot.
Practical example
A salary taxpayer filing for FY 2025-26 is doing AY 2026-27 filing work — that return follows the 1961 Act structure, references old section numbers in schedules, and must be filed using AY 2026-27 ITR forms. The same taxpayer's employer, however, is deducting TDS on April 2026 salary under the 2025 Act framework. The employee's advance tax for the first instalment due in June 2026 is also a Tax Year 2026-27 compliance action under the new Act.
These are two connected but separate workstreams. Treat them as such.
Records to keep
- Form 16 and Form 26AS for FY 2025-26 (the AY 2026-27 return workstream)
- April 2026 onwards payroll and TDS records reflecting 2025 Act section references
- Tax payment challans, clearly dated and marked by period
- A downloaded copy of the official transition FAQ from the Income Tax Department portal
Step-by-step checklist
- Identify whether the Income-tax Act, 2025 transition affects AY 2026-27 filing, Tax Year 2026-27 compliance, or both.
- Read the official source for the specific rule and map it to your income head, taxpayer type, and applicable dates.
- Gather source records, computation notes, challans, statements, and declarations before filing or making a payment.
- Check whether the position changes the ITR form, schedule, tax payment route, TDS/TCS obligations, or disclosure requirement.
- Preserve the final return, e-verification proof, acknowledgement, and working papers.
Official sources
| Reference | Link |
|---|---|
| Income Tax Department - Act 2025 commencement update | Open source |
| Income Tax Department - New Act transition FAQs | Open source |
| Income Tax Department - Income-tax Act 2025 | Open source |
Common mistakes to avoid
- Citing an old section number on a TDS certificate or payment without confirming the equivalent 2025 Act provision.
- Filing AY 2026-27 return records and Tax Year 2026-27 payment records in the same folder without clear period labelling.
- Using a headline slab or rebate figure from a summary article without running the full computation.
- Submitting a return or payment before reconciling AIS, Form 26AS, challans, books, and certificates.
- Not saving the official source and computation note that supported each decision — this matters if a notice arrives later.
How MyeCA helps
MyeCA helps taxpayers and businesses organise records, compare filing routes, build document checklists, review tax-credit mismatches, and identify when a CA-led review is the sensible next step before filing or responding.
Final checklist
Confirm the year and which law governs it. Read the official source for each provision. Collect all supporting records. Draft a short computation note. Verify the return or payment route. Preserve the acknowledgement after submission.