Section 147 of the Income-tax Act: Income Escaping Assessment

Section 147 empowers the Assessing Officer to reassess taxable income that escaped assessment. The power is subject to statutory notice, procedural safeguards, approvals and limitation rules. This guide explains the current provision, the historical changes and its corresponding provision in the Income-tax Act, 2025.

Meaning and scope of Section 147

Income escaping assessment means taxable income that has not been brought to tax correctly for the relevant assessment year. Under the updated Section 147 of the Income-tax Act, 1961, if income chargeable to tax has escaped assessment, the Assessing Officer may, subject to Section 148 and Sections 148A to 153, assess or reassess the income, or recompute a loss, depreciation allowance, other allowance or deduction.

Explanation to Section 147: During a valid reassessment, the officer may examine another issue involving escaped income discovered subsequently in the proceedings, even though the separate preliminary procedure under Section 148A was not followed for that later-discovered issue. This does not dispense with the requirements for valid initiation of reassessment.

How reassessment proceedings are initiated

1. Information suggesting escaped income: The officer must possess qualifying information as contemplated by Section 148 and the applicable rules.
2. Pre-notice procedure: Where required, Section 148A provides for a show-cause notice, disclosure of the relevant information, consideration of the assessee's reply and a reasoned decision with the prescribed approval.
3. Notice under Section 148: If the statutory conditions are satisfied, a notice calls upon the assessee to furnish a return for the relevant year.
4. Reassessment: The officer examines the material and the taxpayer's submissions and passes an order within the applicable statutory time limit.

Exceptions, special regimes and transitional provisions may affect the steps applicable to a particular notice. Search and requisition cases from 1 September 2024 generally follow the separate block assessment framework rather than the ordinary reassessment route.

Time limits under Section 149

For notices governed by the regime effective from 1 September 2024, the following general outer limits apply, measured from the end of the relevant assessment year:

These are general rules, not a substitute for checking the particular notice date, relevant assessment year, statutory exceptions and saving provisions. Earlier notices may be governed by earlier versions of the law.

Income-tax Act, 2025: Section 279

Section 279 of the Income-tax Act, 2025 corresponds to Section 147 of the 1961 Act. It authorises assessment or reassessment of income escaping assessment for a relevant tax year, subject to Sections 280 to 286. Section 279(2) addresses additional issues discovered during proceedings; the corresponding preliminary procedure is in Section 281. Section 279(3), inserted with effect from 1 April 2026, defines the Assessing Officer for Sections 280 and 281 by excluding the National Faceless Assessment Centre and assessment units referred to in Section 273(3).

Earlier law and important amendments

The original text on this page reflected an older Section 147 under which the Assessing Officer generally needed a "reason to believe" that income escaped assessment. That version included special rules for assessments completed under Section 143(3), a four-year proviso, provisions relating to foreign assets, and explanations deeming certain situations to be escaped assessment. Those details remain relevant when examining historical proceedings, but must not be treated as the present statutory wording.

Section 147 was substituted by the Direct Tax Laws (Amendment) Act, 1987, effective 1 April 1989. The Finance Act, 2021 replaced the reassessment framework with effect from 1 April 2021. The Finance (No. 2) Act, 2024 substantially revised notice procedures and time limits with effect from 1 September 2024. Section 152 contains important transitional provisions for certain earlier notices, searches, requisitions and surveys.

What should an assessee check?

• Whether the notice identifies the correct taxpayer, assessment year or tax year and statutory provision.
• Whether the information relied on and the show-cause opportunity were supplied as required.
• Whether the notice was issued within the applicable limitation period and with the required approval.
• Whether any transitional or special assessment regime applies.
• Whether supporting returns, books, bank records and explanations adequately address the alleged escaped income.

Frequently asked questions

Does Section 147 itself prescribe the reassessment notice deadline?

No. The limitation rules are principally in Section 149 of the 1961 Act (and Section 282 of the 2025 Act), together with applicable exceptions and transition provisions.

Can the officer examine another issue discovered during reassessment?

Yes. The explanation to Section 147 permits consideration of an additional escaped-income issue noticed during a valid reassessment, even if the preliminary Section 148A procedure was not separately followed for that additional issue.

Is the old four-year rule still the general rule?

No. The four-year proviso reproduced in older versions of Section 147 is historical. The relevant modern limitation framework must be checked under Section 149 or, where applicable, Section 282 of the 2025 Act.

Official statutory references

• Income Tax Department: Section 147, Income-tax Act, 1961 (2026 text)
• Income Tax Department: Section 279, Income-tax Act, 2025
• Income Tax Department: limitation periods
• Income Tax Department: transition FAQs for the 2025 Act
• Official consolidated Income-tax Act, 1961

This article is general legal information. Applicability depends on the relevant year, the date and nature of the notice, and the saving provisions governing the proceeding.