The New Income-tax Act, 2025 Is Here: What Taxpayers and Professionals Should Know

With effect from 1 April 2026, the Income-tax Act, 2025, which received Presidential assent on 21 August 2025, has replaced the Income-tax Act, 1961 after more than six decades. The new law is essentially a restructuring and redrafting exercise. It is not a change in tax policy, and its stated objective is to make the statute shorter, clearer and easier to administer.

The New Act and the Old Act: A Comparison

Structure. The 1961 Act, amended repeatedly over 65 years, had grown to about 819 sections including inserted provisions. The 2025 Act contains 536 sections arranged in 23 chapters and 16 schedules, and its overall length is reported to be roughly half of the earlier text.

Terminology. The 1961 Act worked with two parallel concepts, the previous year in which income is earned and the assessment year in which it is taxed. The 2025 Act replaces both with a single Tax Year.

Drafting. Long provisos and explanations have given way to shorter sentences, tables and formulae. Income not forming part of total income has been moved to the schedules, deductions from salary have been tabulated at one place, and the expression “notwithstanding” has been replaced by “irrespective”.

Policy. No new tax has been introduced. Rates and slabs are unchanged, and both the new and the old tax regimes for individuals and Hindu undivided families continue.

Tax Year: The Most Visible Change

Under Section 3, a Tax Year is the twelve-month period of the financial year commencing on 1 April. The first Tax Year under the new Act is 2026-27. Income earned in that year is assessed after the year ends, exactly as previous year income was assessed in the following assessment year, but the reference to an assessment year no longer arises. One income now carries one year label, which removes a long-standing source of confusion, particularly in returns, notices and correspondence.

Transition: Where the 1961 Act Still Applies

Income up to Financial Year 2025-26 (Assessment Year 2026-27) continues to be governed by the 1961 Act, even where the return, audit or assessment is completed after 1 April 2026. Tax audit reports, Form 3CD, scrutiny assessments, rectifications and penalty proceedings for earlier years will therefore continue under the old provisions, subject to the savings clauses of the new Act. Professionals will have to work with both statutes in parallel for several years.

Regimes, Deductions and Renumbering

The new tax regime, introduced in 2020 and made the default regime in 2023, has been codified in the 2025 Act (Section 202 is the counterpart of Section 115BAC), while the old regime remains available as an option. The deduction framework of Chapter VI-A has been restructured, and almost every provision now carries a new section number. By way of illustration, the charging provision is Section 2, and the penalty for under-reporting of income, formerly Section 270A, appears as Section 295. The Department has made a mapping utility available, and it should be used when updating references in templates, checklists and client communication.

Advantages and Features of the New Law

Simplicity. A shorter text in plainer language, with tables and formulae in place of dense provisos, makes the law easier to read, apply and explain to clients.

Clarity of time concept. A single Tax Year aligned with the financial year removes the previous year and assessment year distinction.

Logical organisation. Related provisions have been consolidated into fewer chapters, so that a subject can be found in one place instead of being scattered across the Act.

Continuity. As there is no change in rates or policy, taxpayers face no additional burden, and settled interpretations of the substantive provisions are expected to remain useful.

Reduced scope for disputes. Clearer drafting should reduce disputes arising from ambiguity, although the courts will take time to settle the interpretation of the new language.

Modern compliance framework. The Act and the Income-tax Rules, 2026 are designed for a digital environment, and compliance is increasingly aligned with data available to the Department.

Practical Points for Professionals

Engagement letters, working papers, software and checklists should be updated to reflect Tax Year terminology and the new section numbers. Clients should be told which statute governs which year, since returns and audits for Financial Year 2025-26 will still be prepared under the 1961 Act. Advance tax planning for Tax Year 2026-27 should proceed on the basis of the new Act, with particular attention to the regime choice and to any provision whose wording has changed.

Concluding Remarks

The Income-tax Act, 2025 is a significant structural reform. It offers a cleaner and more readable statute without altering the tax burden, but its benefits will be realised only if taxpayers and professionals adapt promptly to the new terminology and numbering while continuing to apply the 1961 Act to earlier years.

Disclaimer: The information provided in this article is for general informational and educational purposes only and does not constitute tax, legal, financial, investment, accounting, or other professional advice. Laws, regulations, tax provisions, and financial information are subject to change and may vary based on individual circumstances. While every effort has been made to provide accurate and up-to-date information, readers should verify the applicable provisions and consult a qualified professional before making any decision or taking any action based on this content. TaxAcumen is not responsible for any loss or consequence arising from reliance on the information provided.