Section 234C of the Income-tax Act, 1961: now section 425

Old section 234C (Interest for deferment of advance tax.) corresponds to section 425 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

425. (1) Where in any tax year, an assessee, liable to pay advance tax under section 404, other than the assessee mentioned in sub-section (3), has failed to pay such tax, or the advance tax paid by the assessee on its current income on or before the date specified in column B of the Table below, is less than advance tax due on returned income, as specified in column C, then th…

Quoted from the Act as published in the Gazette, only to show which section it is.

What the sources say

Section 425 of the Act charges interest on the shortfall of each advance tax instalment: 3% for 15 June, 15 September and 15 December and 1% for 15 March (text read from the Act).

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

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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.