Income tax
Check the relevant tax or assessment year, taxpayer category and current notifications. Use the Tax Calendar link on the official portal.
COMPLIANCE REFERENCE
Dates need context.
Selected standard GST schedules and official reference points for tax, company and foreign exchange obligations.
Standard schedule — extensions not verified. These dates show recurring rules, not confirmation of the final deadline for a particular taxpayer. Verify current notifications and applicability before filing. This calendar is not exhaustive and sends no reminders.
Standard GST source guidance checked 21 September 2026. Calendar year: 2026.
36 standard entries
| Standard date | Return / period | Applicability | Official guidance |
|---|---|---|---|
| GSTR-1 · monthly December 2025 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · quarterly Quarter ending December 2025 |
Eligible quarterly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly December 2025 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending December 2025 |
QRMP filers in the applicable 22-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending December 2025 |
QRMP filers in the applicable 24-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly January 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly January 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly February 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly February 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly March 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · quarterly Quarter ending March 2026 |
Eligible quarterly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly March 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending March 2026 |
QRMP filers in the applicable 22-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending March 2026 |
QRMP filers in the applicable 24-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly April 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly April 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly May 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly May 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly June 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · quarterly Quarter ending June 2026 |
Eligible quarterly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly June 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending June 2026 |
QRMP filers in the applicable 22-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending June 2026 |
QRMP filers in the applicable 24-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly July 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly July 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly August 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly August 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly September 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · quarterly Quarter ending September 2026 |
Eligible quarterly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly September 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending September 2026 |
QRMP filers in the applicable 22-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · quarterly Quarter ending September 2026 |
QRMP filers in the applicable 24-day state/UT group; verify your group Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly October 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly October 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-1 · monthly November 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ | |
| GSTR-3B · monthly November 2026 |
Monthly filers Subject to extensions |
GST guidance ↗ |
Other statutory obligations
Income tax returns, withholding, advance tax, company annual filings and foreign investment reporting depend on the relevant year, entity, transaction and notifications. Dates have not been guessed where current applicability has not been established.
Companies & ROC
Annual and event-based filings require the entity’s financial year, meeting and transaction details.
FEMA & investment
Determine the reporting form and trigger from the specific investment or transaction.