Section FinderSection 148 of the Income-tax Act, 1961: now section 280
Old section 148 (Issue of notice where income has escaped assessment) corresponds to section 280 of the Income-tax Act, 2025, according to the Income Tax Department’s navigator. Checked against the Act: the new section is about the same subject.
The first words of the new section
280. (1)(a) Before making the assessment, reassessment or recomputation under section 279, the Assessing Officer shall, subject to the provisions of section 281, issue a notice to the assessee, along with a copy of the order passed under section 281(3); (b) the notice referred to in clause (a) shall require the assessee to furnish, within such period as may be specified therein…
Quoted from the Act as published in the Gazette, only to show which section it is.
What the sources say
The FAQs list old sections 147 to 153 as corresponding to sections 279 to 286 of the new Act for reassessment, with 148 corresponding to 280.
Which Act applies
The 2025 Act came into force on 1 April 2026 (its section 1(3)). Income of FY 2025-26 and earlier is dealt with under the 1961 Act (the Act’s section 536 and the CBDT’s transition FAQs, Q1.7 and Q1.12), so for those years the old section number is still the one that applies. For tax year 2026-27 onwards use the new number.
Common questions
What is old section 148 called in the new Act?
section 280 (navigator row: Issue of notice where income has escaped assessment). checked against the Act: the new section is about the same subject
Does the 1961 section still apply?
For tax years that began before 1 April 2026 the 1961 Act continues to apply (section 536 of the 2025 Act; CBDT FAQs Q1.7 and Q1.12). Under the 2025 Act the new section applies from tax year 2026-27.
Sources
- Income Tax Department, "Section Mapping" navigator (old section of the Income-tax Act, 1961 against the section of the Income-tax Act, 2025; 22 pages, "Section number as per latest draft": it was prepared for the 2025 Bill). Saved by hand by the site owner from incometaxindia.gov.in and read on 13 November 2026.
- The Income-tax Act, 2025 (Act No. 30 of 2025), Gazette of India Extraordinary, 21 August 2025, 572 pages, from egazette.gov.in, read on 13 November 2026: every new section number below was looked up in it (535 of the 536 sections were located in the text).
- CBDT, "FAQs on Interplay and Transition to the Income-tax Act, 2025" (99 pages), saved by hand, read on 13 November 2026; and the Income Tax Department's "Form Mapping Guide" (4 pages), saved by hand, read on 13 November 2026.
Read on 13 November 2026. The Income-tax Act, 2025 came into force on 1 April 2026 (section 1(3)); the 1961 Act continues to apply to tax years before that (section 536 and the CBDT's FAQs). The mapping comes from the department's navigator, which was drawn up for the Bill, and each new number was checked against the enacted Act; rows that could not be checked are marked. This site is independent and not connected with the Income Tax Department; it is a reading aid, not tax advice.