Income Tax Act 2025: Complete Guide to New Rules, Slabs & Section Changes (FY 2025-26 & 2026-27)
Income Tax Act 2025: Everything That Changed — New Slabs, Sections & What Zero-Tax Up to ₹12 Lakh Actually Means
A plain-English guide to every major amendment from Budget 2025 and the new Income Tax Act replacing the 1961 law from April 2026.
- The Big Picture: A Whole New Tax Law
- New Tax Regime Slabs 2025-26 (Section 115BAC)
- Zero Tax Up to ₹12 Lakh — How Section 87A Works
- All Budget 2025 Changes: Section-by-Section
- Income Tax Act 2025 vs 1961: Structural Changes
- Section Number Mapping Table (Old → New)
- What Did NOT Change
- FAQ: Top Questions People Ask ChatGPT About Income Tax
Every year, millions of Indians search questions like "What is the new income tax slab for 2025-26?" or "Is ₹12 lakh really tax-free?" on Google, ChatGPT, and other AI tools. If you missed last year's revision — or you're just confused by all the news about a "new Income Tax Act" — you're in the right place.
This article covers two separate (but related) sets of changes: first, the Budget 2025 amendments that took effect from April 1, 2025 (applicable right now for FY 2025-26), and second, the brand-new Income Tax Act, 2025 that completely replaced the 1961 Act from April 1, 2026. Let's break it all down.
1. The Big Picture: India Finally Got a New Tax Law
The Income Tax Act, 1961 was India's primary direct tax law for over six decades. Over that time, it accumulated hundreds of amendments, provisos, and explanations — growing from a manageable statute to a 819-section behemoth that even seasoned tax professionals found difficult to navigate.
In February 2025, the government introduced the Income Tax Bill, 2025 in Lok Sabha. It was passed and is now officially the Income Tax Act, 2025, coming into force from April 1, 2026. Here's what makes it significant:
819 Sections → 536 Sections
Redundant, obsolete, and overlapping provisions have been removed. Same law, much leaner.
Plain English (and Hindi)
Dense legal language has been rewritten in clear, readable prose with tables replacing complex provisos.
23 Logical Chapters
Provisions are now grouped by topic — all TDS in one place, all deductions in one place.
No More "Previous Year vs Assessment Year"
Both confusing terms replaced by a single concept: Tax Year (April–March).
2. New Tax Regime Slabs for FY 2025-26 (Section 115BAC)
Budget 2025 revised the income tax slabs under the new (default) tax regime. The basic exemption limit was raised from ₹3 lakh to ₹4 lakh, and a new 25% slab was added to ease the jump from 20% to 30%. Here are the updated slabs:
| Annual Income | Tax Rate (New Regime) | Tax Rate (Old Regime) |
|---|---|---|
| Up to ₹4,00,000 | Nil | Nil (up to ₹2.5L) / 5% |
| ₹4,00,001 – ₹8,00,000 | 5% | 5% |
| ₹8,00,001 – ₹12,00,000 | 10% | 20% |
| ₹12,00,001 – ₹16,00,000 | 15% | 30% |
| ₹16,00,001 – ₹20,00,000 | 20% | 30% |
| ₹20,00,001 – ₹24,00,000 | 25% | 30% |
| Above ₹24,00,000 | 30% | 30% |
The new regime is the default — you don't need to do anything to be in it. To use the old regime (with its HRA, 80C, and other deductions), you must actively opt in when filing your ITR.
3. Zero Tax Up to ₹12 Lakh: How Section 87A Rebate Works
This is the most-searched income tax question in India right now. The answer is: yes, income up to ₹12 lakh is effectively tax-free under the new regime — but it works through a rebate, not a zero slab rate.
Here's how it works step by step:
- Your taxable income is ₹12,00,000.
- Tax is calculated on the slabs: ₹0 (up to ₹4L) + ₹20,000 (5% on ₹4L–₹8L) + ₹40,000 (10% on ₹8L–₹12L) = ₹60,000.
- Section 87A rebate kicks in: since your income ≤ ₹12L, the entire ₹60,000 tax is waived.
- Net tax payable = ₹0.
The moment your income crosses ₹12,00,001 — even by one rupee — the rebate vanishes completely. At ₹12.1L, you'd suddenly owe ₹61,500 in tax. This "cliff effect" is something every taxpayer near this threshold should know about. — Key planning insight under new regime
For salaried employees, the ₹75,000 standard deduction means you can earn a gross salary of ₹12,75,000 and still end up with zero tax liability (₹12,75,000 minus ₹75,000 = ₹12,00,000 taxable).
4. All Budget 2025 Changes: Section-by-Section
Standard Deduction Raised to ₹75,000
For salaried employees and pensioners under the new tax regime, the standard deduction was increased from ₹50,000 to ₹75,000. Family pension deduction was simultaneously raised from ₹15,000 to ₹25,000. Together, these changes save eligible taxpayers up to ₹17,500 in taxes annually.
Updated Return Window Extended — 48 Months
Previously, taxpayers could file an updated return (ITR-U) only within 12 months of the end of the relevant assessment year. This has now been extended to 48 months (4 years). If you made a mistake or missed a year, you have far more time to correct it.
TDS Thresholds Revised Across Multiple Sections
To reduce compliance burden on small taxpayers, the government raised the minimum threshold limits above which TDS is deducted. This means fewer small transactions will trigger TDS obligations for individuals and small businesses. Key areas impacted include interest income, rent, professional fees, and commission payments.
Sections 206AB and 206CCA Deleted
These two sections mandated higher TDS/TCS rates for taxpayers who hadn't filed their returns. Both sections have been completely removed from April 2025, reducing the compliance burden on tax deductors and collectors.
ULIP Taxation — Capital Gains Now Applicable
Unit-Linked Insurance Plans (ULIPs) with an annual premium exceeding ₹2.5 lakh (or 10% of the sum assured) will now have their proceeds treated as capital gains — short-term at 20% or long-term at 12.5%. For ULIPs with premium below this threshold, the Section 10(10D) exemption still applies.
Partner Remuneration Deduction Enhanced
Partnerships and LLPs can now claim a higher deduction for remuneration paid to partners. The calculation limits have been revised upward, allowing larger firms to legitimately reduce their taxable income through enhanced partner pay.
Two Self-Occupied Properties Now Allowed More Freely
Earlier, you could only claim zero annual value for two self-occupied properties if you were unable to live in one due to work-related relocation. This condition has been relaxed, giving more homeowners access to this benefit.
5. Income Tax Act 2025 vs 1961: The Structural Changes
From April 1, 2026, the Income Tax Act, 1961 stands repealed. Here are the biggest structural changes in the 2025 Act that every taxpayer and professional must know.
"Tax Year" Replaces Previous Year + Assessment Year
One of the most confusing aspects of the old law was the two-calendar system. Income earned in "Previous Year 2023-24" was assessed in "Assessment Year 2024-25." The 2025 Act eliminates this and introduces a single concept: the Tax Year, which simply runs from April 1 to March 31. Your FY 2026-27 income is filed and assessed in Tax Year 2026-27. Simple.
All TDS in One Place — Section 393
Under the 1961 Act, TDS provisions sprawled across more than 60 sections (192 through 194T), each with its own rules, thresholds, and exceptions. The 2025 Act consolidates all of this into Section 393. Deductors and practitioners no longer need to navigate a maze of individual sections — everything sits under one roof in a clear tabular format.
All Presumptive Tax Schemes — Section 58
Sections 44AD (small business), 44ADA (professionals like doctors, architects, CAs), and 44AE (goods transport) have been merged into a single Section 58 with a streamlined, table-based format. The substantive rules and percentage rates remain the same.
Virtual Digital Assets — Explicitly Defined
The scope of Virtual Digital Assets (VDAs) — covering cryptocurrencies, NFTs, and similar digital holdings — has been widened and explicitly incorporated into the new Act's definitions and capital gains provisions. Taxation of crypto income (30% flat rate plus 1% TDS) continues as before, now on firmer statutory footing.
MAT Changes for Companies
Minimum Alternate Tax (MAT) is being converted into a final tax from April 1, 2026 at a reduced rate of 14% (down from 15%). Companies can use their brought-forward MAT credit to offset tax liability in the new regime, but only up to one-quarter of their new regime tax liability per year.
6. Section Number Mapping: Old 1961 Act → New 2025 Act
The most practical thing you need right now if you're a professional or an informed taxpayer. Here's where the key sections live under the new Act:
7. What Did NOT Change — Continuity You Can Count On
With so much talk of a "new tax law," it's easy to worry that everything has been turned upside down. It hasn't. Here's what remains completely intact:
- Tax rates and slabs — The 2025 Act introduces no new taxes. Same rates, same policy.
- Section 80C deduction (₹1.5 lakh cap) — Renumbered to Section 123, but the benefit and limit are identical.
- Old tax regime — Still fully available as an opt-in option for those who benefit from HRA, home loan interest deductions, and 80C/80D claims.
- Financial Year (April–March) — No change in the accounting or financial year period.
- Surcharge and Health & Education Cess (4%) — Rates and structure unchanged.
- ELSS deductions — Continue under old regime; no change to the ₹1.5L 80C limit.
- Capital Gains tax rates — STCG at 20% on equity (raised from 15% in Budget 2024), LTCG at 12.5% continue.
- Existing assessments and pending proceedings — All cases under the 1961 Act remain valid and continue under relevant transitional provisions.
8. FAQ: Top Questions People Ask ChatGPT About Income Tax India
Final Thoughts: What Should You Do Right Now?
If you're a salaried individual earning under ₹12.75 lakh, the new regime likely gives you zero tax liability without needing any action. If you're earning above that, it's worth spending 10 minutes comparing both regimes using a tax calculator before you file your ITR.
For professionals and business owners, the new Income Tax Act 2025 is primarily a restructuring exercise. Your obligations, rates, and deductions remain the same — what's changed is where you find the relevant provisions in the statute. Getting familiar with the new section numbers now will save confusion during the next filing season.
The broader message from the government is clear: India is moving toward simpler, digitally-administered, and more transparent direct taxation. The 2025 Act is the foundation for that vision.
- Confirm you're in the correct regime for FY 2025-26 before filing ITR
- If salary is ₹12.75L or below (new regime), expect zero tax liability
- Note the new section numbers if you're a CA, finance professional, or self-filer
- Review ULIP premium amounts — those above ₹2.5L are now taxed as capital gains
- Bookmark the Income Tax Dept's official 1961-to-2025 section mapper for reference
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