Tax Deadline Calendar

Every due date below, as an .ics file your calendar app understands — each event carries a day-before reminder. Works with Google Calendar, Apple Calendar and Outlook.

15 Jun 2026	Advance tax — Q1 installment (15%) First installment of advance tax for FY 2026-27 under s.211.
31 Jul 2026	ITR filing due date (non-audit) Last date to file ITR for FY 2025-26 (AY 2026-27) without late fee u/s 234F.
15 Sept 2026	Advance tax — Q2 installment (45%) Cumulative 45% of estimated advance tax due.
31 Oct 2026	ITR due date (audit cases) Filing due date for taxpayers requiring audit u/s 44AB.
15 Dec 2026	Advance tax — Q3 installment (75%) Cumulative 75% of estimated advance tax due.
31 Dec 2026	Belated / revised ITR last date Final chance to file belated or revised return for AY 2026-27 u/s 139(4)/(5).
15 Mar 2027	Advance tax — Q4 installment (100%) Full advance tax due; also 100% deadline for presumptive (44AD/44ADA) taxpayers.

Prefer emails? The deadline reminder service sends D-7 and D-1 nudges automatically.