A snapshot of near-term statutory due dates relevant to Indian tax and corporate compliance. This calendar is a planning aid only — always confirm the current due date on the relevant official portal before finalising client communication, as dates are subject to extension by notification.
Upcoming Due Dates
| Due Date | Compliance | Applicable To |
|---|---|---|
| 11th of every month | GSTR-1 (monthly filers) | Regular GST-registered taxpayers |
| 20th of every month | GSTR-3B (monthly filers) | Regular GST-registered taxpayers |
| 31 August (AY 2026-27) | ITR-3 / ITR-4 filing (non-audit cases) | Individuals/HUFs with business or professional income, presumptive taxation filers — per Finance Act 2026 |
| 31 August 2026 | CSR-2 / CCFS filing, FY 2025-26 (extended) | Companies covered under MCA’s CSR/CCFS extension |
| 15 September 2026 | Advance Tax — second instalment (45% cumulative) | All taxpayers liable to pay advance tax, FY 2026-27 |
| 30 September | Tax Audit Report (Form 3CA/3CB-3CD) | Taxpayers subject to audit under Section 44AB (unless extended) |
Source and verification: incometax.gov.in, gst.gov.in, and mca.gov.in. For due-date-specific articles and extensions, see our Income Tax and Companies Act coverage.