The Income Tax Act 2025 is the new direct tax law of India that replaced the six-decade-old Income Tax Act, 1961 from 1st April 2026. It focuses on simplifying the structure of income tax law in India, reducing redundant provisions, and reorganising the vast tax laws into a clear and streamlined format.

The new Income Tax Act 2025 was introduced to modernise the tax laws that had become complex after decades of amendments. The new act reorganises provisions into 536 sections across 23 chapters, making it easier for taxpayers, businesses, and tax professionals to understand and comply with tax rules.

What is the Income Tax Act 2025?

The Income Tax Act 2025 is a comprehensive legislation governing the levy, administration, collection, and recovery of direct taxes in India. The new tax provision aims to bring income tax reform by simplifying income tax laws.

The new act aims at simplification of tax laws, making it easier to understand, interpret, and comply with. Easier, more automated and user-friendly compliance is expected to reduce instances of non-compliance and tax avoidance.

When Does the Income Tax Act 2025 Come Into Effect?

The new Income Tax Act 2025 comes into effect from 1st April 2026, completely replacing the existing Income Tax Act 1961. The provisions of the Income Tax Act, 2025 will be applicable for Tax Year 2026-27 and onwards.

For FY 2025-26 (AY 2026-27) the provisions of the existing old Income Tax Act, 1961 will be applicable for ITR filing.

Therefore, the income tax returns filed for FY 2026-27 and onwards will be governed by the provisions of the Income Tax Act, 2025.

Why Was the Income Tax Act 2025 Introduced?

The Income Tax Act 1961 had become extremely complex after hundreds of amendments over decades. Many provisions were outdated, repetitive, scattered, or written in language difficult for taxpayers to interpret. The Income Tax Act 2025 was introduced to address these issues with the following objectives:

• Simplify the tax law
• Reduce litigation
• Improve compliance
• Modernise tax administration

Structural Changes in the Income Tax Act 2025

Although the structure of the law has changed, the tax system itself remains largely similar. The main goal of these changes is to make tax rules easier to read and navigate.

Chapters of the New Income Tax Act 2025

The Income Tax Act 2025 has 23 chapters in total. Find them mentioned in the table below:

Key Changes In Income Tax Act 2025

Although the core of the direct tax laws remain the same, the Income Tax Act 2025 introduces structural and administrative changes. Some of the major changes are as follows:

1. Simplified Structure

The Act reduces the number of sections significantly and focuses on reorganising provisions to make the law easier to interpret and understand. Sections reduced from 819 to 536; chapters from 47 to 23.

2. Digital Assets Covered Explicitly

The definition of Virtual Digital Assets such as cryptocurrencies and NFTs has been more clearly defined under the new Act, bringing clarity for taxpayers dealing in digital assets.

3. Reorganised Deduction Provisions

All deduction provisions that were previously scattered across the Income Tax Act 1961 have now been reorganised and regrouped into simplified sections. For example, Section 80C is now Section 123, and Section 80D is now Section 126.

4. Consolidated TDS Provisions

All TDS provisions have been consolidated under a single Section 393 — Tax to be Deducted at Source. Under the old Act, TDS sections were scattered across 69 individual provisions (192, 194C, 194J, etc.).

5. New 'Tax Year' Concept

The traditionally separate concepts of Financial Year (FY) and Assessment Year (AY) have been merged into a single, unified term: 'Tax Year'. This eliminates the longstanding confusion in notices, returns, and client communications.

6. Improved Compliance Procedure

The Income Tax Act 2025 provides a major boost to compliance procedures with simplification of assessment, appeals, and dispute resolution processes to reduce litigation and improve the taxpayer experience.

Income Tax Slab Rates Under the New Act 2025

The income tax slabs under the Income Tax Act 2025 effective 1st April 2026 are as follows:

1. New Tax Regime Slab Rates (Default — Section 202)

The new tax regime remains the default tax regime under the Income Tax Act 2025 and is covered under Section 202.

2. Old Tax Regime Slab Rates

Deductions Under the Income Tax Act 2025

Many deductions continue to exist under the new law, although the section numbering and organisation has changed. The amounts and eligibility remain largely the same:

TDS Provisions Under the Income Tax Act 2025

The Income Tax Act 2025 has clubbed all TDS provisions under a single Section 393 — Tax to be Deducted at Source. Under the old Income Tax Act, 1961, TDS sections were scattered among various different sections based on income type.

Important for CA Firms: Using old section numbers like 194C or 194J in new-Act TDS returns (Tax Year 2026-27) makes them defective and may invite penalties. Always use new section codes from April 1, 2026 onwards.

Old and New Income Tax Act Section Mapping

The Income Tax Department has provided a utility tool to help taxpayers map sections of the Income Tax Act 1961 with the Income Tax Act 2025. Key section mappings are as follows:

New Form Names Under Income Tax Act 2025

The Income Tax Rules, 2026 have renamed and renumbered all key compliance forms. Using old form names for Tax Year 2026-27 transactions is technically non-compliant:

How Does the Income Tax Act 2025 Affect You?
 

1. Salaried Taxpayers

Income Tax Act 2025 replaces the existing Assessment Year and Financial Year with a single uniform concept of Tax Year. The Act also offers enhanced limits for allowance exemptions under the Income Tax Rules, 2026. The new tax regime remains the default regime, and taxpayers retain the option to opt for the old tax regime.

2. NRI Taxpayers

Income Tax Act 2025 ensures stricter compliance for NRIs through tightened provisions for reporting Foreign Assets. Failure to disclose foreign bank accounts, properties, or shares can attract heavy penalties. However, interest earned from NRE accounts remains tax-free.

3. Senior Citizen Taxpayers

The Income Tax Act 2025 provides significant benefits to senior citizen taxpayers. It retains the existing tax slabs under the old tax regime offering higher basic exemption limits for senior and super senior citizens. The new Act also increases the TDS threshold limit on interest to ₹1 lakh and has merged Form 15G and Form 15H into a single new Form 121.

4. CA Firms & Tax Professionals

This is the most operationally impactful change for CA practices. New section numbers must be used on all TDS challans, returns, and certificates from April 1, 2026. Form 16 becomes Form 130, and the three tax audit forms (3CA/3CB/3CD) merge into a new unified Form 26. Software and workflows must be updated immediately.

Income Tax Act 2025 vs Income Tax Act 1961

The Income Tax Act, 1961 governed India's tax system for over six decades but became complex due to multiple amendments and technical language. The Income Tax Act, 2025, effective from 1 April 2026, introduces a simpler structure and replaces the previous year and assessment year system with a single 'Tax Year'.

New Income Tax Act 2025 Official PDF Download

You can download the official Income Tax Act 2025 PDF from the Income Tax Department website

Old vs New Section Mapping Utility (Official): Click here to access

Sources & References

1. Income Tax Department, Govt. of India — Official Portal: incometax.gov.in

2. Income Tax Act 2025 — Full Text & CBDT Notifications: incometaxindia.gov.in

3. Official ITR Filing FAQ (AY 2026-27 vs Tax Year 2026-27): incometax.gov.in/ITR-FAQ

4. Official TDS Compliance Guide (New Sections): incometax.gov.in/TDS

6. President's Assent — IT Act 2025: newsonair.gov.in

7. Old vs New TDS Section Mapping — caclubindia.com

8. IT Act 2025 Transition Guide — caclubindia.com