GSTR-1 Last Date Calendar (FY 2026-27) + Late Fee & Interest Estimator
Updated: April 23, 2026 • For regular and QRMP filers
If your team keeps searching “GSTR-1 last date” every month, use this one-page calendar and keep this page bookmarked.
- Monthly filers: usually 11th of next month
- QRMP filers: 13th of the month after quarter end
- Late filing may attract late fee + interest depending on liability and delay
FY 2026-27 GSTR-1 Last Date Calendar (Quick View)
| Period | Typical Last Date | Who |
|---|---|---|
| Apr 2026 | 11 May 2026 | Monthly |
| May 2026 | 11 Jun 2026 | Monthly |
| Jun 2026 (Q1) | 13 Jul 2026 | QRMP |
| Jul 2026 | 11 Aug 2026 | Monthly |
| Aug 2026 | 11 Sep 2026 | Monthly |
| Sep 2026 (Q2) | 13 Oct 2026 | QRMP |
Late Fee & Interest Estimation (Fast)
For exact calculation, use our tools below (updated frequently as rules change):
GST Late Fee Calculator
Estimate delay penalty for GSTR returns.
GST Return Due Date Finder
Lookup filing deadlines by return type and filer type.
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