Every monthGST returns (GSTR-1 and GSTR-3B, or quarterly under QRMP); TDS deposit by the 7th; payroll contributions (PF, ESI, professional tax).
1 April – 30 JuneIEC annual update (if you trade across borders).
30 MayLLP: Form 11 annual return.
30 JuneCompany: DPT-3 (return of deposits). Director KYC, in the years it falls due (every third year).
15 JulyFLA return to the RBI, if there is foreign investment.
30 SeptemberCompany: AGM (within six months of year-end). Tax audit report, where applicable.
30 OctoberLLP: Form 8. Company: AOC-4 within 30 days of the AGM.
31 OctoberIncome tax return for audited entities (later if transfer pricing applies).
29 NovemberCompany: MGT-7/7A within 60 days of the AGM.
31 DecemberAnnual GST return (GSTR-9) and reconciliation (GSTR-9C), where applicable.
Half-yearlyMSME-1, if payments to micro or small enterprises are outstanding beyond 45 days.