GST Late Fee Calculator GSTR-3B
GST Late Fee Calculator
Calculate GSTR-1, GSTR-3B or GSTR-9 late filing fee and interest — nil vs regular return, updateable rules.
Your data never leaves your browser — all processing happens locally on your device.
Estimates only — CBIC notifications change penalties. Verify on GST portal before payment.
About this tool
The GST Late Fee Calculator estimates late filing penalties for Indian GST returns — GSTR-1, GSTR-3B and GSTR-9. Enter days late, tax liability and whether it is a nil return — get late fee (per day caps), interest at 18% p.a. on tax due and total penalty. Rules stored in lib/data for easy updates when CBIC notifies changes. Free browser calculator for MSMEs and accountants. Estimates only — pay exact amounts on the GST portal or verify with your CA.
How to use the GST Late Fee Calculator
- 1
Select return type
Choose GSTR-1, GSTR-3B or GSTR-9.
- 2
Enter days late and tax due
Add delay days and tax liability for interest.
- 3
Review penalty breakdown
See late fee, interest and total.
Frequently Asked Questions
What is GSTR-3B late fee?
Typically ₹50/day CGST + ₹50/day SGST for returns with tax; lower for nil returns — subject to caps.
Is interest included?
Yes — 18% per annum on outstanding tax for the days late (approximate).
Are rules always current?
We maintain reference rules — verify latest CBIC notifications before payment.
Can I calculate GSTR-9 annual return penalty?
Select GSTR-9 — higher per-day fees apply with separate caps.