Business Compliance Calendar 2026 — All Due Dates at a Glance
By Parul Singh, GST Practitioner · Compliance
Table of Contents
I maintain compliance calendars for every client. Last year, Delhi businesses paid 500 crore+ in avoidable late fees.
Never miss a deadline. Here are all the important compliance dates for Indian businesses in 2026.
GST Return Due Dates
| Return | Frequency | Due Date |
|---|---|---|
| GSTR-1 | Monthly | 11th of next month |
| GSTR-3B | Monthly | 20th of next month |
| GSTR-1 (QRMP) | Quarterly | 13th of month after quarter |
| GSTR-9 | Annual | 31 Dec of next FY |
| E-way bill | Per movement | Before transport |
Income Tax Due Dates
| Compliance | Due Date |
|---|---|
| Advance tax Q1 | 15 June 2026 |
| Advance tax Q2 | 15 September 2026 |
| Advance tax Q3 | 15 December 2026 |
| Advance tax Q4 | 15 March 2027 |
| ITR filing (non-audit) | 31 July 2027 |
| ITR filing (audit) | 31 October 2027 |
| Tax audit report | 30 September 2027 |
TDS Due Dates
| Compliance | Due Date |
|---|---|
| TDS payment | 7th of next month |
| TDS return Q1 | 31 July |
| TDS return Q2 | 31 October |
| TDS return Q3 | 31 January |
| TDS return Q4 | 31 May (next year) |
| Form 16/16A | 15 June / 15th of next month |
Bookmark this page and check monthly. Late filing attracts penalties and interest.