Income Tax Act 2025: Key Changes Effective from April 2026 for Taxpayers and Businesses

The Income Tax Act, 2025, which replaces the six-decade-old Income Tax Act, 1961, came into effect on April 1, 2026. The CBDT has simultaneously notified the Income Tax Rules, 2026, providing the procedural framework for the new Act. While the substantive tax rates and slabs remain largely unchanged, the new Act significantly restructures the organisation of provisions, consolidates TDS requirements, and introduces a modernised section numbering system. For taxpayers, businesses, chartered accountants, and tax professionals, the transition requires careful attention to the new provision references, updated return forms, and revised compliance timelines. This article provides a practical overview of the key changes.

Why a New Act Was Needed

The Income Tax Act, 1961, had been amended hundreds of times over its lifetime, accumulating layers of provisions, provisos, explanations, and exceptions that made it increasingly difficult to navigate. Sections that originally occupied a few lines had grown into multi-page provisions with nested sub-clauses. The 2025 Act aims to simplify this by reorganising the law into a more logical structure, reducing the total number of sections, and using plain language where possible. The new Act retains the substance of most existing provisions but presents them in a restructured format. This means that while the tax liability for most taxpayers will not change, the section numbers they reference in returns, communications, and legal proceedings will be different.

TDS Consolidation Under Section 393

One of the most significant practical changes is the consolidation of Tax Deducted at Source (TDS) provisions. Under the 1961 Act, TDS was governed by dozens of separate sections (192 through 206), each covering a specific type of payment. The 2025 Act consolidates these under Section 393(1) and its sub-sections. The TDS rates themselves remain largely unchanged: 2 percent for fees for technical services and 10 percent for professional fees, with the threshold of Rs 50,000 retained. However, the consolidated structure means that deductors must update their accounting software, TDS return filing systems, and internal procedures to reference the new section numbers. The CBDT has issued a concordance table mapping old sections to new ones, which taxpayers and tax professionals should keep readily available during the transition period.

New Section Numbering and Return Forms

The new Act adopts a fresh numbering system that does not correspond to the old section numbers. For example, the old Section 80C (deductions for investments) is now located at a different section number under the new Act. The CBDT has notified new ITR forms for the assessment year 2026-27 that reference the new section numbers. Taxpayers filing returns for income earned from April 1, 2026 onwards will use these new forms. For chartered accountants and tax professionals, the transition requires updating all template documents, tax computation worksheets, and client advisory materials to reference the new provisions. Tax software vendors have updated their products to reflect the new Act, but users should verify that their software version is current before filing.

Transition Issues and Pending Litigation

A critical question for taxpayers with pending assessments, appeals, or litigation is how the transition affects their cases. The CBDT has clarified that proceedings initiated under the 1961 Act will continue under the old provisions for the assessment years they cover. The new Act applies prospectively to income earned from April 1, 2026 onwards. However, the interpretation of provisions that have been carried forward in substance but renumbered may give rise to disputes about whether judicial precedents under the old sections apply equally to the corresponding new sections. The CBDT has issued rectification notifications addressing minor drafting errors in the new Rules, which taxpayers should review to ensure they are working with the corrected text.

Practical Steps for Taxpayers and Businesses

For individual taxpayers, the immediate action items are limited. The new ITR forms will guide you through the filing process, and if you use a tax professional, they will handle the section number mapping. For businesses, the transition is more involved. Payroll systems must be updated to reference the new TDS sections. Vendor payment processes that calculate TDS must use the new section numbers. Internal audit checklists and compliance calendars should be updated. For companies with transfer pricing obligations, the new Act retains the existing framework but under new section references, requiring updates to transfer pricing documentation templates. The CBDT's concordance table and the rectified Income Tax Rules 2026 are essential reference documents for this transition period.