Section 151 of the Income-tax Act, 1961: Sanction for Issue of Reassessment Notice

Section 151 identifies the specified income-tax authority whose sanction is required in the reassessment notice process under sections 148 and 148A. The applicable approval authority depends on the statutory version governing the particular proceedings.

Meaning and purpose of section 151

A reassessment involves reopening an assessment where income chargeable to tax is believed to have escaped assessment. Section 147 addresses income escaping assessment; section 148 deals with the notice for reassessment; section 148A prescribes the preliminary procedure; section 149 specifies limitation periods; and section 151 identifies the authority responsible for statutory sanction.

Text of section 151 applicable from 1 September 2024

Under section 151 as substituted by section 46 of the Finance (No. 2) Act, 2024, the specified authority for the purposes of sections 148 and 148A is the Additional Commissioner or Additional Director or Joint Commissioner or Joint Director, as the case may be.

This replaced the previous two-tier approval hierarchy, which distinguished cases by the number of years elapsed from the end of the relevant assessment year. The amended section should be read together with the procedure in sections 148 and 148A and the transitional provisions of section 152.

How sanction fits into the reassessment process

1. Information about escaped income: The Assessing Officer must proceed on the basis of information and legal conditions applicable under section 147 and related provisions.
2. Pre-notice procedure: Where required, section 148A provides for a show-cause notice, consideration of the taxpayer's reply and a decision under the prescribed procedure.
3. Specified authority: Sanction must be obtained from the authority specified by the applicable version of section 151 at the stage required by law.
4. Reassessment notice: Any notice under section 148 must also satisfy section 149 limitation requirements and other statutory conditions.

Which approval authority applies?

The historical approval hierarchy is provided for transitional proceedings, not as the general rule for notices governed by the substituted section 151.

Transitional rules under section 152

Section 152(3): For searches or requisitions, and specified surveys, conducted on or after 1 April 2021 but before 1 September 2024, sections 147 to 151 continue to apply in the form in which they stood immediately before the Finance (No. 2) Act, 2024, subject to the terms of that subsection.

Section 152(4): In other cases where a section 148 notice had been issued, or an order under the former section 148A(d) had been passed, before 1 September 2024, the reassessment is governed by sections 147 to 151 as they stood immediately before that amendment.

Income-tax Act, 2025: position from 1 April 2026

The Income-tax Act, 2025 commenced on 1 April 2026. Its reassessment provisions are contained in sections 279 to 286, with section 284 addressing sanction for issue of notice. These provisions apply to tax year 2026-27 and subsequent tax years.

For assessment years up to AY 2026-27, reassessment can still be initiated or continued under the Income-tax Act, 1961 where the savings provisions permit. Section 536 of the 2025 Act preserves the operation of the earlier law in relevant cases. The Income Tax Department's official reassessment FAQ specifically explains that the approval hierarchy in section 151 of the 1961 Act continues to apply to those earlier assessment years.

Earlier section 151: historical position

The Finance Act, 2015 substituted section 151 with effect from 1 June 2015. Under that earlier text, where more than four years had elapsed from the end of the relevant assessment year, a section 148 notice required satisfaction of the Principal Chief Commissioner, Chief Commissioner, Principal Commissioner or Commissioner based on the Assessing Officer's recorded reasons.

In other cases, an Assessing Officer below the rank of Joint Commissioner required the Joint Commissioner's satisfaction. The approving authority was not required to issue the notice personally. These rules are historical and should not be confused with the subsequently substituted reassessment framework.

Frequently asked questions

Is approval under section 151 mandatory?

Where the applicable reassessment procedure requires sanction, compliance with the statutory approval requirement is essential. The validity of a notice depends on the law applicable to its facts and date.

Is the Principal Commissioner always the approving authority?

No. Under section 151 substituted with effect from 1 September 2024, the specified authority is the Additional Commissioner, Additional Director, Joint Commissioner or Joint Director, as applicable. Transitional cases may follow an earlier approval hierarchy.

Does the Income-tax Act, 2025 replace section 151 for all old assessment years?

No. The Income Tax Department clarifies that the 1961 Act can continue to govern reassessment proceedings for earlier assessment years, including cases initiated after 1 April 2026, subject to applicable savings and limitation provisions.

Official legal sources and further reading

• Income Tax Department: Section 151, Income-tax Act, 1961
• Finance (No. 2) Act, 2024 - section 46 and transitional amendments
• Income Tax Department: Section 152 - transitional provisions
• Income Tax Department: Reassessment Proceedings FAQs
• Income Tax Department: Limitation periods

This article provides general legal information. The applicable statutory text, transitional rules and relevant judicial decisions should be checked for the particular assessment year and notice date.