New Income Tax Act 2025: What Changed From 1 April 2026

India got a brand-new income tax law this year. The new Income Tax Act 2025 came into force on 1 April 2026 and replaced the Income-tax Act, 1961, which had governed income tax for more than sixty years. Many people now see unfamiliar words like “tax year” and new form numbers, and wonder whether their tax bill has changed too.

The short answer: the law has been rewritten, but the Act itself did not change tax rates. This guide explains in simple words what is new, what stays the same, and what you need to do. When you finish, test yourself with our free New Income Tax Act 2025 quiz.

What is the new Income Tax Act 2025?

The Income-tax Act, 2025 is the main law that decides how income tax works in India: who pays, on what income, which deductions are allowed and how returns are filed. It replaces the Income-tax Act, 1961.

The old law had been amended again and again over six decades. It had grown to about 819 sections, with many provisos, explanations and outdated parts that even professionals found hard to follow. The government’s aim was to keep the substance but make the law shorter, clearer and easier to read.

The new Act has about 536 sections, arranged in 23 chapters and 16 schedules. Tables and formulas replace many long paragraphs, and repeated or dead provisions were removed.

Income Tax Act 2025 effective date and timeline

The gap between assent and commencement was deliberate. It gave taxpayers, employers, software makers and the tax department time to prepare new rules and forms.

Income Tax Act 2025 applicability: which law applies to which year?

This is the question most people ask. The rule is simple:

• Income earned up to 31 March 2026 (financial year 2025-26) is still taxed under the old 1961 Act. The return you file in 2026 for that income uses the familiar old terms and forms, such as Form 16.
• Income earned from 1 April 2026 falls under the new 2025 Act. The first full year under the new law is tax year 2026-27, and its returns will be filed in 2027.

Old cases, such as pending assessments or notices for earlier years, continue under the law that applied to that year. You do not need to refile anything because the law changed.

The biggest change: “tax year” replaces two confusing terms

Under the 1961 Act there were two terms for one period of income:

• Previous year: the year you earned the income.
• Assessment year: the next year, when that income was assessed and taxed.

So income earned in 2025-26 belonged to “assessment year 2026-27”. Many first-time taxpayers found this confusing.

The new Act uses a single term, the tax year: the financial year from 1 April to 31 March in which you earn the income. Income earned from 1 April 2026 to 31 March 2027 belongs to tax year 2026-27. You will still file the return after the year ends, but there is now only one year label to remember.

Income Tax Act 2025 vs 1961: at a glance

What does NOT change for most taxpayers

It is just as important to know what stays the same:

• Tax rates and slabs were not changed by the new Act itself. Rates are fixed each year through the Union Budget and the Finance Act, as before.
• Both tax regimes continue. You can still choose between the new regime (the default) and the old regime with deductions, if you are eligible.
• The main deductions still exist under the old regime. Popular ones like the deduction for PPF, ELSS and life insurance premiums (long known as section 80C) and for health insurance premiums (section 80D) are still there, under new section numbers.
• PAN, Aadhaar linking, TDS and the e-filing portal all continue as before.
• Your money does not move. Investments, FDs, insurance policies and loans are not affected by the change of law.

New section numbers: the popular ones

Because the whole law was rearranged, almost every section has a new number. You will see the new numbers in rules, forms and tax software. A few that salaried people meet most often:

You do not need to memorise these. Tax software, Form 130 and the e-filing portal show the right references. Just do not be alarmed when “80C” is described under a different number.

New form numbers you will see

The Income-tax Rules, 2026 also renumbered the forms. The most common changes:

Timing matters. The new forms apply from tax year 2026-27. For income earned in 2025-26, your employer will usually still give you the old Form 16, because that year falls under the old Act.

Other changes in the new Act

• Faceless processes in the law itself. Faceless assessment and e-proceedings, earlier added through separate schemes, are now part of the Act.
• Virtual digital assets. Crypto and similar assets are covered more clearly, including in rules on undisclosed income found during searches.
• Plainer language. Many long sentences were split up and replaced with tables, which should mean fewer disputes over meaning.
• Fewer cross-references. Related rules are grouped together, so you do not need to jump across the law as much.

Who notices the change most?

• Salaried employees: mainly new names. From tax year 2026-27 you will receive Form 130 instead of Form 16, and your payslip and investment declarations may quote new section numbers.
• Senior citizens with FD interest: the declaration to avoid TDS on interest is now a single Form 121, in place of separate Forms 15G and 15H, for new years.
• Freelancers and small businesses: books, audits and TDS on payments to others now refer to new sections, so update your accounting software and invoice templates.
• Students and exam aspirants: commerce, CA and competitive exam courses are moving to the new numbering. Learn both, because older cases and books still use the 1961 references.
• Tax professionals: most of the work is mapping old sections to new ones and handling the years that still fall under the old law.

What should you do now?

For most salaried people, the honest answer is: not much, but stay aware.

1. File your return for 2025-26 as usual under the old rules, using Form 16 from your employer.
2. From tax year 2026-27, expect new names. Your next TDS certificate will be Form 130, and your tax credit statement will be Form 168.
3. Use the official portal and updated software. Do not trust old templates or forwarded PDFs that still quote old section numbers for new years.
4. Choose your regime carefully each year. The new Act did not decide this for you. Compare both regimes using the Budget rates for that year.
5. Keep proofs as before. Investment and insurance proofs are still needed if you use the old regime.
6. Beware of scams. Fraudsters use big changes like this to send fake “tax refund” or “new PAN rule” messages. The tax department does not ask for your OTP, card number or bank PIN. Read our UPI fraud guide to stay safe.

Where to find the new Income Tax Act 2025 PDF

Many people search for the “new income tax act 2025 PDF” or the full section list. Download it only from official sources: the Income Tax Department’s websites (incometaxindia.gov.in and incometax.gov.in) or the Gazette of India. Avoid apps and links shared on WhatsApp or Telegram that ask you to log in or pay for the “official PDF”. The law is free to read.

Frequently asked questions

When did the new Income Tax Act 2025 come into force?

On 1 April 2026. It applies to income earned from that date, starting with tax year 2026-27.

Did income tax rates change because of the new Act?

No. The new Act mainly simplified and reorganised the law. Tax rates and slabs are set each year by the Finance Act, as they were before.

Is section 80C removed in the new Income Tax Act?

No. The deduction for investments like PPF, ELSS and life insurance premiums continues under the old regime, but under a new section number (section 123 with a schedule).

Which form will replace Form 16?

From tax year 2026-27, the salary TDS certificate is Form 130. For income earned in 2025-26, you will still usually get Form 16.

Do I file my 2026 return under the new Act?

The return you file in 2026 is for income earned in 2025-26, so it follows the old 1961 Act. Your first return under the new Act will be for tax year 2026-27, filed in 2027.

What is the difference between Income Tax Act 2025 and 1961?

The 2025 Act is shorter (about 536 sections against about 819), uses simpler language and a single “tax year”, and renumbers sections and forms. The basic way income is taxed stays the same.

The bottom line

The new Income Tax Act 2025 is a cleaner rulebook, not a new tax. From 1 April 2026, one “tax year” replaces two confusing terms, sections and forms get new numbers, and the law is easier to read. Your 2026 filing works as before, and the new names start showing up from tax year 2026-27.

Test what you learned with our New Income Tax Act 2025 quiz, try the ITR filing quiz, or explore more tax quizzes.