Income Tax Act 2025: Complete Guide to Key Changes, Tax Slabs & New Section Numbers
India’s income tax law just went through its biggest overhaul in over sixty years. The Income Tax Act, 2025 took effect on 1 April 2026, replacing the Income Tax Act, 1961 — and if you’re a taxpayer, business owner, or tax professional, there’s a lot to get your head around before you file your next return.
This guide walks through everything that’s changed: the new structure, the tax slabs, what happened to your familiar deductions, and exactly how this affects you depending on who you are.
The Big Picture, in 30 Seconds
- The new Act applies from Tax Year 2026-27 onwards — it does not apply to the return you’re filing for FY 2025-26.
- Tax rates and the core tax system are largely unchanged. What’s different is structure, numbering, and drafting.
- “Assessment Year” and “Financial Year” are gone, replaced by a single concept: Tax Year.
- Sections have dropped from over 700 to 536, and the entire Act now runs to roughly 622 pages, down from 823.
- Familiar deductions — 80C, 80D, 24(b), 87A — all still exist, just under new numbers.
Why the Government Rewrote the Entire Act
The Income Tax Act, 1961 had been amended so many times over six decades that it had become genuinely difficult to navigate — overlapping provisions, outdated language, and cross-references that even tax professionals found tedious to untangle. Litigation around interpretation had also been climbing for years.
The 2025 Act was built with four specific goals in mind: simplify the language and structure, cut down on the disputes that arise from ambiguous drafting, make compliance more straightforward for ordinary taxpayers, and modernise the administrative machinery behind tax collection — including how digital records and digital assets are treated.
When Does It Actually Apply to You?
This is where most of the confusion is happening right now, so it’s worth spelling out clearly.
| Income Earned In | Law That Governs It | When You File |
|---|---|---|
| FY 2025-26 (up to 31 March 2026) | Income Tax Act, 1961 | July / October 2026 |
| Tax Year 2026-27 (from 1 April 2026) | Income Tax Act, 2025 | July / October 2027 |
So even though the new Act is technically “in force” right now, the return you’re preparing this year still runs entirely on the old framework. The new Act governs income earned from this point forward — you’ll only see its provisions show up on a tax return starting next year’s filing cycle.
New Tax Regime Slabs (Section 202)
The new tax regime continues to be the default option for all taxpayers, now codified under Section 202.
| Income Slab | Tax Rate |
|---|---|
| Up to ₹4 lakh | Nil |
| ₹4 lakh – ₹8 lakh | 5% |
| ₹8 lakh – ₹12 lakh | 10% |
| ₹12 lakh – ₹16 lakh | 15% |
| ₹16 lakh – ₹20 lakh | 20% |
| ₹20 lakh – ₹24 lakh | 25% |
| Above ₹24 lakh | 30% |
Old Tax Regime Slabs (If You Choose to Opt In)
Taxpayers can still elect the old regime, which retains its age-based exemption structure.
| Income Slab | Below 60 yrs / NRI | 60–80 yrs (Resident) | Above 80 yrs (Resident) |
|---|---|---|---|
| Up to ₹2,50,000 | Nil | Nil | Nil |
| ₹2,50,001 – ₹3,00,000 | 5% | Nil | Nil |
| ₹3,00,001 – ₹5,00,000 | 5% | 5% | Nil |
| ₹5,00,001 – ₹10,00,000 | 20% | 20% | 20% |
| Above ₹10,00,000 | 30% | 30% | 30% |
What Happened to Your Familiar Deductions
This is usually the first thing people worry about — and the reassuring news is that the deductions themselves haven’t disappeared. They’ve just been regrouped and renumbered into a cleaner structure.
| Category | What it Covers | Old Section | New Section | Benefit Changed? |
|---|---|---|---|---|
| Investments & Retirement | PPF, ELSS, Life Insurance, NPS | 80C / 80CCD | 123 / 124 | No |
| Health & Insurance | Medical Insurance Premium | 80D | 126 | No |
| Loans | Education Loan Interest, Home Loan Interest | 80E / 24(b) | 129 / 22 | No |
| Giving & Savings | Donations, Savings Account Interest | 80G / 80TTA | 133 / 153 | No |
| Salary-related | Standard Deduction, Professional Tax | 16(ia) / 16(iii) | 19 | No |
| Exempt Allowances | HRA, LTA, Gratuity, Leave Encashment | Section 10 Sub-clauses | Moved to Dedicated Exemption Schedules | No |
Across nearly every commonly used provision, the underlying limit and benefit stay the same — only the reference number and the schedule it sits under have changed.
Structural Changes: By the Numbers
| Metric | Income Tax Act, 1961 | Income Tax Act, 2025 |
|---|---|---|
| Sections | 700+ | 536 |
| Schedules | 14 | 16 |
| Total Pages | ~823 | ~622 |
| In Force | Until 31 March 2026 | From 1 April 2026 |
Beyond the section count, a few specific drafting changes stand out:
Virtual digital assets now have a clearer definition. Cryptocurrencies and NFTs are explicitly addressed rather than loosely interpreted under older provisions that predate the crypto era.
All TDS provisions sit under one section. Instead of being scattered across dozens of sections based on income type, TDS is now consolidated entirely under Section 393.
Deduction provisions are grouped logically. What used to be spread across Sections 80C through 80U is now organised into coherent schedules and sections based on the type of benefit, rather than historical numbering accidents.
Assessment and appeal procedures are streamlined, with the explicit goal of reducing the volume of tax litigation that built up under the old framework.
How This Affects You, Based on Who You Are
Salaried Employees
You’ll deal with a new vocabulary: “Tax Year” replaces both “Previous Year” and “Assessment Year” on your forms and portal. Allowance exemption limits have also been revised upward under the accompanying Income Tax Rules, 2026. The new regime remains your default, but you can still actively opt for the old regime if it works out better for your specific deductions.
NRIs
Reporting requirements around foreign assets have tightened considerably. If you hold foreign bank accounts, property, or shares and haven’t been disclosing them properly, the penalties for non-disclosure are steeper under the new framework. On the upside, interest earned on NRE accounts continues to be tax-free.
Senior and Super Senior Citizens
The higher basic exemption limits available to senior citizens under the old regime continue unchanged. One practical improvement: the TDS threshold on interest income has been raised to ₹1 lakh, and the two separate declaration forms — 15G and 15H — have been merged into a single Form 121, cutting down on paperwork.
Self-Employed Professionals and Small Business Owners
This group doesn’t get much attention in most coverage of the new Act, but it’s worth flagging: the government has indicated that the presumptive taxation scheme — which lets small businesses and professionals pay tax on an estimated income basis rather than maintaining detailed books — has been strengthened under the new law, aimed specifically at reducing compliance burden for this segment.
Crypto and Digital Asset Investors
If you trade or hold cryptocurrencies, NFTs, or other virtual digital assets, the new Act’s explicit definitions mean less ambiguity about how these holdings are classified and taxed compared to relying on provisions that were never designed with digital assets in mind.
Income Tax Act 2025 vs Income Tax Act 1961
| Aspect | Income Tax Act, 1961 | Income Tax Act, 2025 |
|---|---|---|
| In Force | Since 1962 | From 1 April 2026 |
| Year Concept | Previous Year + Assessment Year | Single Tax Year |
| Default Regime | Section 115BAC | Section 202 |
| TDS Provisions | Spread across Sections 192–194T | Consolidated in Section 393 |
| Drafting Style | Dense, Heavily Cross-referenced | Tables and Formulas Used for Clarity |
| Digital Assets | Loosely Covered Under General Provisions | Explicitly Defined |
A Practical Example
Consider Arjun, a salaried professional earning ₹14 lakh a year. He invests ₹1.5 lakh in ELSS and pays ₹25,000 in health insurance premiums.
For his FY 2025-26 return (filed in 2026), he claims these under the old, familiar Section 80C and Section 80D — nothing changes for him this year.
From Tax Year 2026-27 onwards, the same ₹1.5 lakh ELSS investment will be claimed under Section 123, and his health insurance premium under Section 126. His actual tax outgo doesn’t change because of this — only the section he quotes on the form does.
Checklist Before You File Your Next ITR
- Confirm which year’s income you’re reporting — that decides which Act and section numbers apply, not today’s date.
- Don’t assume your deduction limits have changed; cross-check the specific provision if you’re unsure.
- If you’re an NRI, review your foreign asset disclosures carefully given the tightened reporting requirements.
- Senior citizens should check whether the new ₹1 lakh TDS threshold on interest changes how much tax gets deducted at source this year.
- When referencing a specific section number in any document, verify it against the Income Tax Department’s official comparison utility rather than relying solely on third-party summaries.
Frequently Asked Questions
Will my tax liability go up or down because of this new Act?
For most taxpayers, no — the slabs, exemption limits, and deduction amounts are largely unchanged. This is a structural and administrative overhaul, not a tax-rate change.
Do I need to file anything differently right now?
Not for your FY 2025-26 return. That continues under the old Act. The new Act will be relevant starting with returns for Tax Year 2026-27.
What's the single biggest practical change for most people?
The shift to “Tax Year” as a unified concept, replacing the separate Previous Year and Assessment Year system that often confused first-time filers.
Are there any new compliance burdens introduced?
The clearest one is for NRIs, who face stricter foreign asset reporting requirements. Senior citizens, by contrast, see a reduction in paperwork through the Form 121 merger.
Where can I look up a specific section if it's not covered here?
The Income Tax Department’s official portal provides a dedicated tool to compare any provision under the 1961 Act with its corresponding section under the 2025 Act.