Compliance6 min read
The 2026 GST compliance calendar every business should pin up
Filing dates, reconciliation windows and the three deadlines that quietly cause the most notices.
NG
Neha Gupta
Compliance Lead · 2 July 2026
GST penalties are rarely the result of not knowing the rules. They come from a calendar nobody owns.
GSTR-1 is due on the 11th, GSTR-3B on the 20th, and the annual return by 31 December. The dates are the easy part — the failures cluster around input credit reconciliation, where mismatches between 2A/2B and your books surface months later as a notice.
Reconcile monthly, not annually. Chase non-filing vendors in the same month. And keep a single owner for the calendar, even if the filing itself is outsourced.
- GST
- Compliance
- Finance