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Case law › Section 151

Section 151

Authorities that bear on section 151 of the Income-tax Act, 1961. Each one tells you what it decided and what to do if it applies to you.

The Income-tax Act, 1961 was repealed on 1 April 2026. It still governs income earned up to 31 March 2026, and every proceeding about those years however late — assessment, reassessment, rectification, penalty, revision and appeal alike. Income earned from 1 April 2026 is governed by the Income-tax Act, 2025. What changed, and which Act governs your year →

Section 151 — the law in short

What the courts have decided on section 151, in one screen. Read this first; open an entry when you need the facts, the reasoning and the source.

Listed strongest first: Supreme Court, then High Court, then Tribunal, then CBDT. Nothing here has yet been read in full by a chartered accountant — open an entry to see where it came from.

Section 151 — 28 entries

Worked examples

Notice situations in which section 151 does the work, taken from the first line to the last. Each step carries the authority that licenses it.
A s.133(6) notice for six years of records about a supplier under investigation, with nothing pending and no approval on the face of it A s.133(6) notice has come asking for six years of records about a supplier who is under investigation, and no proceeding is pending against me. Must I answer it, how much of it, and can my own reply be used to reopen my years? 8 steps · 45 authorities · s.133(6), s.133, s.133C, s.135 A s.148 notice for AY 2020-21 arrived in May 2025 alleging Rs 62 lakh escaped Is this notice inside the s.149 window at all, and does the Rs 50 lakh limb actually apply to this year? 7 steps · 11 authorities · s.148, s.149, s.148A, s.151 A s.148A(b) notice that described an appraisal report, gave seven days, and produced the report for the first time as an annexure to the s.148A(d) order The show-cause never gave me the material it relied on and the officer annexed it only to the order rejecting my reply - what does that actually get me? 8 steps · 29 authorities · s.148A, s.148A(b), s.148A(d), s.148 An APA covering AY 2023-24 is signed, the modified return is filed under s.92CD, and the officer reopens the covered year anyway My APA covers the year and I filed the modified return under s.92CD and offered the additional income - can the Assessing Officer reopen that year and re-examine whether I complied with the agreement? 8 steps · 26 authorities · s.92CC, s.92CC(4), s.92CC(7), s.92CC(9A) The department has my exchange data for FY 2023-24 and says my crypto income is a tenth of what it should be Exchange data shows Rs 6.73 crore of receipts against the Rs 11.6 lakh I put in Schedule VDA, and there is now a s.148A show-cause. How do I answer it, and what do I have to concede? 8 steps · 24 authorities · s.148A, s.149, s.115BBH, s.194S The s.148 notice for AY 2021-22 came from our ward officer, not through automated allocation Is a reassessment notice issued by the jurisdictional Assessing Officer rather than the faceless unit still worth challenging? 7 steps · 15 authorities · s.148, s.148A, s.151A, s.144B

Explained in this library

What section 151 does, in plain English, before you read what the courts made of it.

"Reason to believe" and the recorded reasons

Can the officer reopen my assessment just because something looks suspicious to him?

An audit objection is information - the argument is about what the officer did with it

The reopening is admittedly driven by an audit objection the Assessing Officer himself did not accept. Is that a ground?

Sanction for reopening (section 151)

Who had to approve this reopening, and does a one-line approval count?

TOLA and the surviving time: working out the date your s.148 notice had to be issued by

My old s.148 notice was turned into a show-cause notice by Ashish Agarwal and a fresh s.148 notice came in 2022. How do I work out whether that fresh notice was in time?

Which Act governs your year: the 1961 Act after 1 April 2026

I am holding a notice and I do not know whether my year is under the Income-tax Act, 1961 or the Income-tax Act, 2025. Which Act applies to me, and is the old Act still of any use now that it has been repealed?

Who may issue the s.148 notice now: s.151A, s.147A and where the fight actually stands

Is the point that my ward officer issued the s.148 notice instead of the faceless unit still worth taking, and what happens if the assessment is already complete?