Deadline finder

Which deadlines apply to me?

Three questions, and the list below narrows to what is actually yours.

1 Which year, and in which sense?

Deadlines FOR a financial year Deadlines IN a calendar year

Calendar year the deadline falls in

2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031
2 I am …

An individual A freelancer A startup / SMB An enterprise
3 How are you set up for GST?

How are you set up for GST?
GST registered Monthly GST returns Inter-state supplies

Your deadlines falling in 2026

January 2026

Due on	Filing	Period	Filed by	Deadline
January 12, 2026	GSTR-1	December 2025	yourself or an advisor	288 days ago
January 20, 2026	GSTR-3B	December 2025	yourself or an advisor	280 days ago

February 2026

Due on	Filing	Period	Filed by	Deadline
February 11, 2026	GSTR-1	January 2026	yourself or an advisor	258 days ago
February 20, 2026	GSTR-3B	January 2026	yourself or an advisor	249 days ago

March 2026

Due on	Filing	Period	Filed by	Deadline
March 11, 2026	GSTR-1	February 2026	yourself or an advisor	230 days ago
March 20, 2026	GSTR-3B	February 2026	yourself or an advisor	221 days ago

April 2026

Due on	Filing	Period	Filed by	Deadline
April 13, 2026	GSTR-1	March 2026	yourself or an advisor	197 days ago
April 20, 2026	GSTR-3B	March 2026	yourself or an advisor	190 days ago

May 2026

Due on	Filing	Period	Filed by	Deadline
May 11, 2026	GSTR-1	April 2026	yourself or an advisor	169 days ago
May 20, 2026	GSTR-3B	April 2026	yourself or an advisor	160 days ago

June 2026

Due on	Filing	Period	Filed by	Deadline
June 11, 2026	GSTR-1	May 2026	yourself or an advisor	138 days ago
June 22, 2026	GSTR-3B	May 2026	yourself or an advisor	127 days ago

July 2026

Due on	Filing	Period	Filed by	Deadline
July 13, 2026	GSTR-1	June 2026	yourself or an advisor	106 days ago
July 20, 2026	GSTR-3B	June 2026	yourself or an advisor	99 days ago
July 31, 2026	Income Tax Return (non-audit) *	2025-26	filed yourself	88 days ago

August 2026

Due on	Filing	Period	Filed by	Deadline
August 11, 2026	GSTR-1	July 2026	yourself or an advisor	77 days ago
August 20, 2026	GSTR-3B	July 2026	yourself or an advisor	68 days ago

September 2026

Due on	Filing	Period	Filed by	Deadline
September 11, 2026	GSTR-1	August 2026	yourself or an advisor	46 days ago
September 21, 2026	GSTR-3B	August 2026	yourself or an advisor	36 days ago

October 2026

Due on	Filing	Period	Filed by	Deadline
October 12, 2026	GSTR-1	September 2026	yourself or an advisor	15 days ago
October 20, 2026	GSTR-3B	September 2026	yourself or an advisor	7 days ago

November 2026

Due on	Filing	Period	Filed by	Deadline
November 02, 2026	Income Tax Return (audit cases) *	2025-26	filed by an advisor	in 6 days
November 11, 2026	GSTR-1	October 2026	yourself or an advisor	in 15 days
November 20, 2026	GSTR-3B	October 2026	yourself or an advisor	in 24 days

December 2026

Due on	Filing	Period	Filed by	Deadline
December 11, 2026	GSTR-1	November 2026	yourself or an advisor	in 45 days
December 21, 2026	GSTR-3B	November 2026	yourself or an advisor	in 55 days

About these dates

For these returns the deadline depends on the case. A non-audit return is due 31 July; where a tax audit under s.44AB is required, the return is due later. Every other date in the table is the same either way.
A date falling on a Sunday or a public holiday moves to the next working day (s.10, General Clauses Act).
Where the CBDT extended a date by circular, the original stands beside it, struck through. The info marker names the circular.
State holidays are not taken into account, and the CBDT extends these dates by circular in most years — check the current circular before relying on a date.

This overview is not tax advice. For your own case, please confirm the dates with a chartered accountant or on the Income Tax Department's e-filing portal.

This is not advice. Whether a threshold is crossed depends on your numbers.

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