New Income-tax Act 2025: What Changes from April 2026?

India’s New Income-tax Act, 2025 marks a major restructuring of India’s income-tax law. The new law took effect from 1 April 2026 and replaced the Income-tax Act, 1961 under the new framework.

One major change is the move from “previous year” and “assessment year” to the simpler concept of a “tax year”. The new Act also reorganises provisions, uses clearer language, reduces cross-referencing and incorporates many explanations and provisos into the main sections.

The purpose of the New Income-tax Act 2025 is primarily simplification and easier compliance. According to official guidance, the reform is not intended to introduce a new tax or increase the overall tax burden merely because of the replacement of the 1961 Act.

The Income-tax Rules, 2026 also came into force from 1 April 2026. Taxpayers should check which law applies to a transaction, return, payment or proceeding, as transitional provisions may continue to apply to matters relating to earlier tax periods.

For taxpayers, businesses and professionals, it is important to understand the new terminology, tax-year concept and updated compliance procedures before making tax decisions.

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