Tool
GSTR-3B late fee and interest calculator
Enter the dates and the tax you are paying in cash to estimate the late fee and interest.
Estimate · example figures
Days late—
Late fee (CGST + SGST)—
Interest at 18% a year—
Total—
How it is calculated
- Late fee: ₹50 a day (₹25 CGST + ₹25 SGST), or ₹20 a day for a nil return, capped at ₹2,000, ₹5,000 or ₹10,000 by turnover slab, and ₹500 for nil returns (Notification 19/2021-Central Tax).
- Interest: 18% a year on the tax paid in cash, for the days of delay (section 50 of the CGST Act).
- Results are estimates. Waivers and later notifications can change the amount.
See our GST and bookkeeping service →
Need help with this?
General information only, as of October 2026. It is not professional advice; requirements change and depend on your facts.