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Compliance calendar

Statutory due dates by month, with the rule or section for each. Dates are not moved for holidays, and the government sometimes extends them, so check the latest notification before you rely on a date.

Aug

September 2027

Oct

Date	Compliance	Law	Period
7 Sep, Tue	TDS/TCS deposit Rule 218(2)(b), Income-tax Rules, 2026	Income tax	August 2027
10 Sep, Fri	GSTR-7 (TDS under GST) Rule 66, CGST Rules, 2017	GST	August 2027
10 Sep, Fri	GSTR-8 (TCS by e-commerce operators) Rule 67, CGST Rules, 2017	GST	August 2027
11 Sep, Sat	GSTR-1 (monthly filers) Rule 59, CGST Rules, 2017	GST	August 2027
13 Sep, Mon	IFF (optional, QRMP filers) Rule 59, CGST Rules, 2017	GST	August 2027
15 Sep, Wed	Advance tax 2nd instalment (45%) Section 408, Income-tax Act, 2025	Income tax	FY 2027-28
15 Sep, Wed	ESI contribution Regulation 31, ESI (General) Regulations, 1950	PF/ESI	August 2027
15 Sep, Wed	PF contribution and ECR Para 38, EPF Scheme, 1952	PF/ESI	August 2027
20 Sep, Mon	GSTR-3B (monthly filers) Rule 61, CGST Rules, 2017	GST	August 2027
25 Sep, Sat	PMT-06 tax payment (QRMP filers) Rule 61, CGST Rules, 2017	GST	August 2027
30 Sep, Thu	DIR-3 KYC (directors) Rule 12A, Companies (Appointment and Qualification of Directors) Rules, 2014	Company law	FY 2026-27
30 Sep, Thu	Tax audit report Section 63, Income-tax Act, 2025 r/w Rule 47	Income tax	FY 2026-27