Income Tax Act, 2025: Key Changes, Applicability and What Taxpayers Should Know

India’s direct tax framework has entered a significant new phase with the Income Tax Act, 2025. The new legislation replaces the Income-tax Act, 1961 and is designed to make tax law more coherent, readable, and easier to administer.

The new Act came into force from 1 April 2026. However, taxpayers should not assume that the old law disappeared overnight. The transition has been structured carefully, with the earlier Act continuing to govern tax years and proceedings that relate to periods before the new framework became applicable.

What Is the Income Tax Act, 2025?

The Income Tax Act, 2025 is India’s new principal legislation governing direct taxation. It replaces the Income-tax Act, 1961 after decades of amendments that had made the earlier legislation increasingly labyrinthine.

The objective is not to introduce a completely new tax system. Instead, the Government describes the reform as an effort to simplify statutory language, improve structural clarity, reduce interpretational disputes, and encourage voluntary compliance.

One notable change is the reduction in legislative bulk. The new Act contains 536 sections and 16 schedules, compared with 819 sections and 14 schedules under the 1961 Act. Explanations and provisos have also been integrated more directly into provisions, while tables and formulas replace some lengthy narrative drafting.

When Does the New Act Apply?

The effective date is 1 April 2026.

For Tax Year 2026–27 and later, the new Act applies. For periods relating to Assessment Year 2026–27 or earlier, the Income-tax Act, 1961 generally remains the governing legislation. This distinction is particularly important during the transition because taxpayers may interact with both Acts at the same time.

For example, income earned during FY 2025–26 is reported for AY 2026–27 under the 1961 Act, even if the return is filed after 1 April 2026. Conversely, advance tax relating to Tax Year 2026–27 is governed by the new Act.

Key Features of the Income Tax Act, 2025

1. Simpler Legislative Structure

The new framework seeks to reduce the dense cross-referencing and layered drafting associated with the previous legislation. Provisions have been reorganised into a more logical sequence, making the statute comparatively easier to navigate.

For taxpayers, this could mean less time spent deciphering archaic wording and more clarity when identifying the relevant provision.

2. New Tax Year Terminology

The new framework moves toward a Tax Year concept rather than relying on the earlier financial-year and assessment-year terminology in the same manner.

This is intended to make the relationship between the period in which income is earned and the corresponding tax compliance process more intuitive.

3. Consolidated Return Provisions

Under Section 263, provisions dealing with original, belated, revised, and updated returns have been brought together into one section. The fundamental obligation to file returns remains broadly similar to the earlier framework.

This consolidation is a useful example of the Act’s broader drafting philosophy: fewer scattered provisions and a more unified statutory structure.

4. Continuity During Transition

The repeal of the 1961 Act does not invalidate assessments, proceedings, or other actions relating to earlier tax years. Transitional provisions preserve the continuity of existing matters.

That matters considerably for taxpayers involved in assessments, appeals, reassessments, or disputes concerning earlier years.

What Does It Mean for NRIs?

For NRIs, understanding the transition is particularly important because Indian-source income can involve property, rent, investments, capital gains, interest, and other transactions.

An NRI should first establish the applicable Tax Year, residential status, source of income, and relevant compliance obligation before deciding which provisions apply.

For instance, an NRI who earned rental income from Indian property during FY 2025–26 would deal with that income under the earlier Act for AY 2026–27. Income arising in Tax Year 2026–27, however, falls under the new legislative framework.

This distinction can prevent a surprisingly common mistake: applying a new provision to an old tax year simply because the return or payment happens after 1 April 2026.

What Taxpayers Should Do Now

Taxpayers should review their records and understand which tax period each transaction belongs to. This is especially important for transactions involving TDS, advance tax, property sales, foreign income, investments, and return filing.

The e-filing portal now supports tax payments under both frameworks during the transition. New challans for Tax Year 2026–27 onwards are available under the Income Tax Act, 2025, while payments relating to earlier periods continue under the 1961 Act.

For TDS, the applicable legislation depends on when the earlier of credit or payment occurs. If that event occurs on or before 31 March 2026, the 1961 Act generally applies; from 1 April 2026 onward, the 2025 Act applies.

Frequently Asked Questions

1. Is the Income Tax Act, 2025 applicable from 1 April 2026?

Yes. It applies to Tax Year 2026–27 onwards. Earlier periods generally continue to be governed by the Income-tax Act, 1961.

2. Has the Income Tax Act, 2025 introduced a new tax?

No. The Income Tax Department states that the purpose of the new legislation is simplification and structural reform rather than introducing a new tax.

3. Does the 1961 Act still matter?

Yes. It continues to govern earlier tax years and relevant transitional proceedings.

4. Which Act applies to FY 2025–26 income?

FY 2025–26 income is reported for AY 2026–27 under the Income-tax Act, 1961.

5. Which Act applies to advance tax for Tax Year 2026–27?

Advance tax relating to Tax Year 2026–27 is governed by the Income Tax Act, 2025.