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 (ITR-1 / ITR-2) Last date to file ITR-1/ITR-2 for FY 2025-26 (AY 2026-27) without late fee u/s 234F. |
| 31 Aug 2026 | ITR due date (ITR-3 / ITR-4, non-audit) Business/professional returns not requiring audit, FY 2025-26 (AY 2026-27). |
| 15 Sept 2026 | Advance tax — Q2 installment (45%) Cumulative 45% of estimated advance tax due. |
| 21 Oct 2026 | Tax audit report due (extended) Tax audit report u/s 44AB for AY 2026-27 — extended by CBDT from 30 Sep to 21 Oct 2026. |
| 21 Nov 2026 | ITR due date (audit cases, extended) ITR for taxpayers requiring audit u/s 44AB — extended by CBDT from 31 Oct to 21 Nov 2026. |
| 30 Nov 2026 | ITR due date (transfer-pricing cases) Returns of taxpayers required to furnish a transfer-pricing report (s.92E). |
| 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.