GST Due Date Helper
Pick a return period and see GSTR-1/GSTR-3B due dates and countdowns.
Due Dates & Countdown
GSTR-1 (monthly)
Outward supplies statement, regular monthly filers.
11 Oct 2026
in 26 days
GSTR-3B (monthly)
Summary return with tax payment, regular monthly filers.
20 Oct 2026
in 35 days
How the calculation works
Due dates follow fixed statutory rules by filing frequency. Pick your period and scheme; the helper shows each deadline with a countdown from today.
- Monthly GSTR-1
11th of the month following supplies - Monthly GSTR-3B
20th of the following month - QRMP quarterly
GSTR-1 on the 13th; 3B on the 22nd (Cat-X states) or 24th (Cat-Y)
Worked example
You enter
You get
Important points to keep in mind
- Countdowns compare against today's date on your device — refresh near deadlines.
- CBIC notifications occasionally extend dates; the portal announcement wins over any static table.
- Late filing attracts ₹50/day late fee (₹20/day for nil-liability returns) plus 18% p.a. interest on cash paid late.
Frequently asked questions
Is GSTR-3B due date the same for everyone?
Monthly filers: the 20th. QRMP filers: 22nd or 24th depending on state category. This helper handles both.
What happens if I miss a due date?
Late fee accrues daily per return, interest runs on unpaid cash tax, and buyers may lose visibility of their ITC until you file.
Does this include CMP-08 or annual return dates?
No — it focuses on GSTR-1/GSTR-3B cycles. Composition (CMP-08) and annual (GSTR-9) dates follow separate calendars.
Related GST tools
Prepare your returns in GSTSelf
Done estimating? Prepare the actual return.
GSTSelf walks you through your invoices, builds GSTR-1 and GSTR-3B data, and keeps everything on your device — no uploads, no account.