Quick answer
The Income-tax Act, 2025 replaced the six-decade-old Income Tax Act, 1961 from 1st April 2026. It doesn’t change how much tax you pay overnight, but it does change the language, structure, and several compliance mechanics: a new “Tax Year” replaces the old Financial Year/Assessment Year system, the number of sections has been nearly cut in half, and CBDT has wider powers to issue binding guidelines. If you’re a salaried individual, business owner, or professional filing returns in India, here’s what actually changes for you.
Why a new Act at all?
The Income Tax Act, 1961 had been amended so many times over 60+ years that it became difficult even for professionals to navigate; provisions were scattered, cross-referenced, and inconsistently worded. The Income-tax Act, 2025 was drafted to simplify structure and language without altering the underlying tax policy in one shot. Sections have gone from 819 to 536, with more use of tables and formulas to reduce ambiguity.
The biggest practical change: “Tax Year” replaces FY and AY
For decades, Indian taxpayers dealt with two overlapping periods: the Financial Year (when income is earned) and the Assessment Year (when it’s assessed and taxed). The new Act merges these into a single concept called the Tax Year, aligning India’s system more closely with international norms.
In practice: the period from 1st April 2026 to 31st March 2027 is simply “Tax Year 2026-27” — there’s no separate “AY 2027-28” to track. This mainly simplifies paperwork and terminology; it doesn’t change your filing deadlines by itself.
Old regime vs new regime: still both alive
A common misconception is that the new Act scrapped the old tax regime. It hasn’t. Both regimes continue to coexist:
- The new regime remains the default, with a basic exemption limit of ₹4 lakh, and eligible resident individuals with taxable income up to ₹12 lakh pay nil tax due to the rebate (salaried individuals effectively up to ₹12.75 lakh after the ₹75,000 standard deduction).
- The old regime is still available for taxpayers who want to claim deductions on insurance premiums, health insurance, and specified investments — but it must be actively chosen.
Slab rates announced in Budget 2026 were retained without change, so this is a good year to actually sit down and compare which regime saves you more, rather than defaulting on autopilot.
What’s changed for businesses and compliance
A few provisions are worth flagging for business owners specifically:
- Stronger domestic control over dividends: companies must maintain share registers, hold general meetings, and pay dividends only within India.
- Stricter audit trails: stock exchanges must now retain audit trails for seven years and report modified transactions monthly.
- Wider powers for cross-border taxation: for non-resident income, tax authorities can now estimate income using percentage-based methods or global profit ratios, giving them more flexibility in scrutiny.
- New zero-coupon bond framework: approvals now require applications 3 months before issuance and investment-grade ratings from two agencies.
Does this affect your filing deadlines this year?
No — due dates for ITR filing, tax audits, and TDS/TCS deposits for FY 2025-26 (Tax Year 2026-27) continue on their usual schedule. The Act changes structure and terminology, not the compliance calendar itself. If you’re unsure which deadlines apply to you this year, that’s worth a separate conversation with your CA rather than assuming nothing’s changed.
What should you actually do about it?
- Don’t assume “new Act” means “new tax liability” — for most individual taxpayers, the immediate cash impact is limited.
- Re-check whether the old or new regime suits you better this year, especially if your income composition changed.
- If you run a company, review your dividend payment and share register practices against the new domestic-control requirements.
- If you have cross-border transactions, expect more scrutiny under the new estimation powers — documentation matters more, not less.
Bottom line
The Income-tax Act, 2025 is largely a structural and linguistic overhaul rather than a policy shake-up — but a few provisions (dividend controls, audit trail requirements, cross-border estimation powers) have real teeth for businesses.
Related: see our full guide on the full Income Tax Act, 2025 vs 1961 comparison.