Tool

GSTR-3B late fee and interest calculator

Missed a GSTR-3B due date? 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, IGST-only cases and later notifications can change the amount.

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General information only, as of October 2026. It is not professional advice; requirements change and depend on your facts.