Free tool · GST
GST Due-Date Calendar
Every GST return date for a state and filing type, with an iCal feed for your phone.
Rule pack version 2 · dates as of 13 Oct 2026
Next up: GSTR-1A for Sep 2026, due 20 Oct 2026
May 2026
- 11Mon
GSTR-1Apr 2026Passed
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Wed
GSTR-1AApr 2026Passed
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Wed
GSTR-3BApr 2026Passed
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
June 2026
- 11Thu
GSTR-1May 2026Passed
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Sat
GSTR-1AMay 2026Passed
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Sat
GSTR-3BMay 2026Passed
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
July 2026
- 11Sat
GSTR-1Jun 2026Passed
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Mon
GSTR-1AJun 2026Passed
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Mon
GSTR-3BJun 2026Passed
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
August 2026
- 11Tue
GSTR-1Jul 2026Passed
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Thu
GSTR-1AJul 2026Passed
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Thu
GSTR-3BJul 2026Passed
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
September 2026
- 11Fri
GSTR-1Aug 2026Passed
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Sun
GSTR-1AAug 2026Passed
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Sun
GSTR-3BAug 2026Passed
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
October 2026
- 11Sun
GSTR-1Sep 2026Passed
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Tue
GSTR-1ASep 2026
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Tue
GSTR-3BSep 2026
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
November 2026
- 11Wed
GSTR-1Oct 2026
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Fri
GSTR-1AOct 2026
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Fri
GSTR-3BOct 2026
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
December 2026
- 11Fri
GSTR-1Nov 2026
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Sun
GSTR-1ANov 2026
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Sun
GSTR-3BNov 2026
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
January 2027
- 11Mon
GSTR-1Dec 2026
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Wed
GSTR-1ADec 2026
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Wed
GSTR-3BDec 2026
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
February 2027
- 11Thu
GSTR-1Jan 2027
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Sat
GSTR-1AJan 2027
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Sat
GSTR-3BJan 2027
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
March 2027
- 11Thu
GSTR-1Feb 2027
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Sat
GSTR-1AFeb 2027
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Sat
GSTR-3BFeb 2027
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
April 2027
- 11Sun
GSTR-1Mar 2027
Monthly statement of outward supplies
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017 - 20Tue
GSTR-1AMar 2027
Optional amendment of GSTR-1 before GSTR-3B
OptionalVerified: Verified against the notification by a reviewer.rule from 1 Aug 2024 - 20Tue
GSTR-3BMar 2027
Monthly GST summary return and tax payment
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
December 2027
- 31Fri
GSTR-9FY 2026-27
Annual GST return
Known: Known rule, awaiting chartered accountant sign-off.rule from 1 Jul 2017
Not tax advice. These figures come from the OneTrails rule tables; verify them on the GST portal before you file or pay.
- Verified: Verified against the notification by a reviewer.
- Verified against the notification by a reviewer.
- Known: Known rule, awaiting chartered accountant sign-off.
- Known rule, awaiting chartered accountant sign-off.
- Uncertain: Uncertain: an open question is pending. Check the portal before relying on it.
- Uncertain: an open question is pending. Check the portal before relying on it.
For CA firms
Sign Up to Automate This for Every Client
OneTrails builds this calendar for every GSTIN of every client, assigns each return to a person and reminds them before the date.
Method
Where the Figures Come From
Each date is worked out by the same rule engine that builds the compliance calendar inside OneTrails. It reads the obligation rules for the filing type you chose, the quarterly state groups for QRMP filers and any extension notified for the period, all from the rule tables in force for that period.
Every row shows how sure the rule table is (verified, known or uncertain) and the date the rule took effect. When the government extends a date, the extension appears here once the rule tables carry it, with the notification number.
The iCal feed carries the same dates. Subscribe once and your calendar app picks up changes on its next refresh.
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- HSN and SAC LookupSearch by words or code and see the GST rate in force today, with its notification.