Chapter One
Why There Is a New Income-tax Act, and What Changed
Syllabus topic 1, "Introduction to Income Tax Act 2025 including the rationale, basic framework and key highlights"
In one line
The Income-tax Act, 2025 is the law that now charges income-tax in India; it replaced the Income-tax Act, 1961 with effect from 1 April 2026.
In the wording a student should be able to write: the Income-tax Act, 2025 (30 of 2025) received the assent of the President on 21 August 2025 and, by section 1(3), came into force on 1 April 2026, repealing the Income-tax Act, 1961 by section 536(1).
Why there is a new Act at all
The 1961 Act was in force for more than sixty years. In that time it was amended by every annual Finance Act and by many others besides. Each amendment was written into the existing structure rather than the structure being redrawn, so the Act accumulated provisos on provisos, explanations attached to explanations, and long sections whose sub-clauses had been inserted at different dates and read as if they had been.
The 2025 Act is a consolidating and amending Act. Its long title says so: "An Act to consolidate and amend the law relating to income-tax." Consolidate means gather the scattered law into one place; amend means change it while doing so. So two things are true at once, and a student must hold both:
- Most of the substantive law is the same. Salary is still taxed as salary, a house is still taxed on its annual value, and a capital gain is still the consideration less the cost.
- The structure, the numbering and much of the drafting are new. Where the old Act used a proviso, the new Act often uses a table. Where the old Act used two dates, the new Act uses one.
The provision itself
Section 1 is three sub-sections and it is worth knowing exactly:
1. (1) This Act may be called the Income-tax Act, 2025.
(2) It extends to the whole of India.
(3) Save as otherwise provided in this Act, it shall come into force on the 1st April, 2026.
Section 536(1) is the other half of the answer:
536. (1) The Income-tax Act, 1961 (43 of 1961) is hereby repealed.
"Save as otherwise provided" in section 1(3) matters. It means the Act names a single commencement date but allows particular provisions to be brought in differently where the Act itself says so. It is not a general power to delay.
The old Act is repealed but not finished with
This is the point most often got wrong, and it is a fair short-answer question.
Section 536(2) preserves the operation of the repealed Act. In particular, section 536(2)(c) provides that the 1961 Act continues to apply to any proceeding pending when the new Act commenced, and to proceedings initiated on or after 1 April 2026 in respect of any tax year beginning before 1 April 2026
Why There Is a New Income-tax Act, and What Changed
- including notices, assessment, reassessment, recomputation, rectification, penalty, reference, revision and appeals.
So the correct statement is not "the 1961 Act is gone". It is:
| Which year the income belongs to | Which Act governs it |
|---|---|
| A tax year beginning on or after 1 April 2026 | Income-tax Act, 2025 |
| Any year beginning before 1 April 2026 | Income-tax Act, 1961, even for a proceeding started after the new Act commenced |
Section 536(2) also preserves anything already done under the old Act, and any right, privilege, obligation or liability already acquired, accrued or incurred under it.
The key highlights MU asks for
One time concept. The old Act ran on two: the previous year in which income arose and the assessment year in which it was taxed. The new Act has one, the tax year, defined in section 3. This is the single change a student will feel on every question. It has its own chapter.
Five heads, unchanged. Section 13 keeps the classification: Salaries, Income from house property, Profits and gains of business or profession, Capital gains, and Income from other sources.
Exemptions moved into Schedules. Under the old Act the exemptions were a single very long section. Here, section 11 provides that income enumerated in Schedules II to VI is not included in total income, section 11(3) exempts the persons in Schedule VII, and section 12 deals with Schedule VIII, political parties and electoral trusts.
A default regime. Section 202 sets out the new tax regime for individuals, Hindu undivided families and others, and it is the default. That section number exists only in this Act, and it is the quickest way to tell which Act a question is set on.
Tables instead of provisos. Much of what the old Act said in prose is now set out in tables inside the section, with a serial number, a description and a condition. A table is easier to read and easier to cite: a reference is given as the section, the table, and the serial number.
What this does NOT mean
It is not a new tax. No new charge was created. Section 4 charges income-tax on total income exactly as before.
It did not set the rates. Section 4(1) charges tax "where any Central Act enacts that income-tax shall be charged ... at any rate or rates". That Central Act is the annual Finance Act. The rates for a year are found there, never in the Income-tax Act itself. The text used throughout this book is the Income-tax Act, 2025 as amended by the Finance Act, 2026.
It does not make old learning useless. The reasoning transfers. The numbering does not. Read an older book for the technique of a computation if you must, but never copy a section number out of it.
Why There Is a New Income-tax Act, and What Changed
Quick revision
- Income-tax Act, 2025, Act 30 of 2025, assented 21 August 2025.
- Section 1(3): in force 1 April 2026. Section 1(2): extends to the whole of India.
- Section 536(1) repeals the Income-tax Act, 1961 (43 of 1961).
- Section 536(2)(c): the old Act still governs any tax year beginning before 1 April 2026, including proceedings begun afterwards.
- It consolidates and amends: same substance in the main, new structure and new numbering.
- Rates come from the Finance Act, not from this Act (section 4(1)).
Test yourself
1. When did the Income-tax Act, 2025 come into force, and under which provision? On 1 April 2026, under section 1(3).
2. A notice for the year 2024-25 is issued in June 2026. Which Act applies? The Income-tax Act, 1961. Section 536(2)(c) preserves it for any tax year beginning before 1 April 2026, even where the proceeding is initiated after the new Act commenced.
3. Does the Income-tax Act, 2025 prescribe the rates of tax? No. Section 4(1) charges tax at the rate or rates enacted by a Central Act, which is the annual Finance Act.
4. What does the long title of the Act say it does? It is an Act to consolidate and amend the law relating to income-tax, so it both gathers the existing law and changes it.
Answer in one sentence
What is the Income-tax Act, 2025? It is Act 30 of 2025, an Act to consolidate and amend the law relating to income-tax, which extends to the whole of India, came into force on 1 April 2026 under section 1(3), and repealed the Income-tax Act, 1961 by section 536(1) while preserving that Act for tax years beginning before that date.