New Income Tax Act 2025: Everything That Changes from April 1, 2026

India Gets a Brand New Income Tax Law

After 63 years, India is finally getting a new income tax law. The Income Tax Act, 2025 replaces the Income Tax Act, 1961, effective April 1, 2026 (i.e., from Tax Year 2026-27 onwards). This is the biggest overhaul of India's direct tax framework in over six decades.

But here is the most important thing to understand upfront: this is mostly a simplification, not a revolution. Your tax rates are not changing. Your deductions are not disappearing. The government has essentially rewritten the same rules in cleaner, simpler language with fewer sections and less confusion.

That said, there are some genuinely important changes you need to know about. Let us break them all down.

Why Was a New Act Needed?

The 1961 Act had become a monster of complexity. Over 63 years, thousands of amendments, circulars, and court rulings turned it into a maze that even tax professionals struggled to navigate. Consider this:

Feature	Old Act (1961)	New Act (2025)
Total sections	819	536
Total words	~4.5 lakh	~2.6 lakh (40% shorter)
Provisos and explanations	900+	Drastically reduced
Year terminology	Financial Year + Assessment Year	Just "Tax Year"
TDS sections	Scattered across 30+ sections	Consolidated under Section 393
Language complexity	Dense, legalistic	Simplified, table-based

The Biggest Change: "Tax Year" Replaces FY and AY

If you have ever been confused about the difference between Financial Year (FY) and Assessment Year (AY), you are not alone. This has been one of the most confusing aspects of Indian taxation for decades.

Under the new Act, both terms are gone. Everything is now simply called the "Tax Year". The tax year runs from April 1 to March 31 — same as the old Financial Year. But there is no more separate Assessment Year. You earn income in a tax year, and you file your return for that same tax year.

So starting April 1, 2026, instead of saying "FY 2026-27 / AY 2027-28," you just say Tax Year 2026-27. Simple.

Section Renumbering: Old Sections Get New Numbers

This is what will cause the most confusion initially. All the sections you have memorized over the years — 80C, 80D, 10(10D), 194A — now have completely new numbers. The deductions and exemptions remain the same, but the section references change.

Here is a mapping of the most commonly used sections:

Purpose	Old Section (1961 Act)	New Section (2025 Act)
Investment deduction (PPF, ELSS, LIC, etc.)	Section 80C	Section 123
Health insurance premium	Section 80D	Section 126
Education loan interest	Section 80E	Section 127
Home loan interest (self-occupied)	Section 24(b)	Section 19(b)
HRA exemption	Section 10(13A)	Section 8(1)(a)
Salary income	Section 15-17	Section 14-16
House property income	Section 22-27	Section 17-21
Capital gains	Section 45-55A	Section 67-91
TDS on salary	Section 192	Section 393(1)
TDS on interest	Section 194A	Section 393(6)
NPS deduction (employer)	Section 80CCD(2)	Section 124(2)
Donation deduction	Section 80G	Section 129

Important: If you are filing your return for income earned up to March 31, 2026, the old section numbers still apply. The new numbers kick in only for the Tax Year starting April 1, 2026.

What About Tax Rates and Slabs?

The tax rates have not changed because of the new Act. The rates announced in the Union Budget 2025-26 continue:

New Tax Regime (Default from Tax Year 2026-27)

Income Slab	Tax Rate
Up to ₹4,00,000	Nil
₹4,00,001 – ₹8,00,000	5%
₹8,00,001 – ₹12,00,000	10%
₹12,00,001 – ₹16,00,000	15%
₹16,00,001 – ₹20,00,000	20%
₹20,00,001 – ₹24,00,000	25%
Above ₹24,00,000	30%

Effective tax-free income: Up to ₹12 lakh (₹12.75 lakh for salaried individuals with the ₹75,000 standard deduction) — thanks to the Section 87A rebate.

Use our Income Tax Calculator to see exactly how much tax you will pay under the new and old regimes.

Key Substantive Changes (Not Just Renumbering)

While most changes are cosmetic (renumbering), there are a few genuinely new rules:

1. No Interest Deduction on Dividend and Mutual Fund Income

Under the old Act, you could claim expenses (including interest on borrowed money) against dividend income and mutual fund gains. Under the new Act, no deduction for interest or expenses is allowed against dividend income or mutual fund income.

2. Buyback Proceeds Taxed Differently

When a company buys back its shares, the proceeds received by shareholders will now be taxed as capital gains in the hands of the shareholder, not as dividend distribution tax paid by the company. This shifts the tax burden from the company to the investor.

3. Expanded PAN Requirements

The new Act mandates PAN for a wider range of transactions:

• Cash deposits exceeding ₹10 lakh in a financial year
• Property transactions above ₹20 lakh
• Vehicle purchases above ₹5 lakh
• Hotel spending exceeding ₹1 lakh
• All insurance premiums (no minimum threshold)
• Securities transactions above ₹10 lakh

4. Consolidated TDS Framework

All 30+ TDS sections from the old Act have been consolidated under Section 393. Instead of remembering 194A for interest, 194C for contracts, 194H for commission, etc., everything now falls under sub-sections of Section 393. This does not change the TDS rates — just the references.

Old Regime Deductions: Still Available, New Numbers

If you opt for the old regime, all the popular deductions remain available:

• Section 123 (old 80C): Up to ₹1.5 lakh — PPF, ELSS, LIC, home loan principal, school tuition
• Section 126 (old 80D): Health insurance premium — ₹25,000 (₹50,000 for seniors)
• Section 127 (old 80E): Education loan interest — no upper limit
• Section 124 (old 80CCD): NPS contribution — additional ₹50,000
• HRA, LTA, home loan interest — all continue with new section numbers

Check our PPF Calculator and NPS Calculator to see how these investments grow while saving you tax.

Transition Rules: What Applies When?

This is critical to understand:

• Income earned up to March 31, 2026: Old Act applies. Your ITR for FY 2025-26 (AY 2026-27) will still use the old section numbers
• Income from April 1, 2026 onwards: New Act applies. ITR for Tax Year 2026-27 will use new section numbers
• Ongoing cases and disputes: Existing tax cases will continue under the old Act's provisions
• Advance tax and TDS: From April 1, 2026, all withholding follows new Act references

What Should Taxpayers Do Now?

1. Do not panic. Your tax rates and deductions are not changing — just the section numbers
2. File your FY 2025-26 return using the old section numbers (the ITR forms for AY 2026-27 will still reference old sections)
3. Update your investment declarations at work to reference new section numbers from April 2026
4. Review insurance policies and investment proofs — your CA or employer may ask for documents with updated section references
5. Consider the new regime if you do not have many deductions — it is simpler and the default option

The Bottom Line

The new Income Tax Act 2025 is a welcome cleanup of India's tax law. It does not change how much tax you pay, but it makes the law easier to read, understand, and comply with. The biggest practical impact for most people will be memorizing a few new section numbers — and that is about it.

For a quick calculation of your tax liability under both regimes, use our Income Tax Calculator.

Disclaimer: This article is for informational purposes only and does not constitute tax advice. Tax laws are subject to change. Please consult a qualified chartered accountant or tax advisor for advice specific to your situation.