Applicability — Which Law Applies?

Comprehensive transition guide based on the official CBDT FAQs on Interplay and Transition between ITA 1961 and ITA 2025.

Key principle: ITA 2025 is effective from 1 April 2026 and applies to the tax year commencing on 1 April 2026 — i.e., TY 2026-27 (AY 2027-28) onwards. ITA 1961 continues to govern TY 2025-26 (AY 2026-27) and all earlier years, including returns for AY 2026-27 filed in July 2026, as well as all pending proceedings under prior years. Section 536 contains 22 sub-clauses addressing every transitional situation. Section 6 of the General Clauses Act, 1897 acts as a catch-all for unforeseen gaps.
56 scenariosacross 10 categories
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Disclaimer: This guide is based on the official CBDT FAQs on Interplay and Transition and does not constitute legal advice. It is based on ITA 2025 and ITA 1961 as on the date of publication. Subsequent amendments, notifications, or circulars may affect accuracy. Always verify the current legal position and consult a qualified tax professional before relying on this information.