Free tool
GST late fee calculator
Estimate the late fee and 18% interest on a delayed GSTR-1 or GSTR-3B. Enter the days delayed and your net tax liability to see the total payable.
Late fee & interest
Estimate GSTR-1 / GSTR-3B late fee and 18% interest for delayed filing
Return type
Interest is charged at 18% p.a. on the net tax paid in cash. Nil returns have no interest.
Estimated total payable
₹897.95
Late fee (15 × ₹50)
₹750.00
₹375 CGST + ₹375 SGST
Interest @ 18% p.a.
₹147.95
15 days
A maximum late-fee cap applies per return (turnover-based, e.g. ₹500–₹5,000 per return for many taxpayers). This estimate does not apply the cap — verify the exact figure on the GST portal before paying.
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How GST late fee & interest work
Late fee per day
₹50/day (₹25 CGST + ₹25 SGST) for returns with tax, and ₹20/day (₹10 + ₹10) for nil returns, counted from the due date to the filing date.
Interest on tax
18% per annum on the net tax paid in cash after the due date. Nil returns carry no interest because there is no tax.
Maximum cap
A turnover-based maximum late-fee cap applies per return (commonly ₹500 to ₹5,000). This tool shows the uncapped estimate — verify the cap on the portal.
Per Act
Late fee is charged separately under the CGST and SGST Acts, which is why the per-day figures are split into two equal halves.
FAQ
GST late fee FAQs
What is the late fee for GSTR-3B or GSTR-1?+
The late fee is ₹50 per day (₹25 CGST + ₹25 SGST) for a return with tax, and ₹20 per day (₹10 + ₹10) for a nil return, counted from the due date until you file. A turnover-based maximum cap applies per return.
How much interest is charged on late GST payment?+
Interest is 18% per annum on the net tax paid in cash after the due date. It is calculated for the number of days of delay (amount × 18% × days ÷ 365).
Is there interest on a nil return?+
No. A nil return has no tax liability, so no interest applies — only the ₹20/day late fee until it is filed.
Is there a maximum late fee?+
Yes. The late fee is capped per return based on turnover (commonly ₹500 to ₹5,000). This calculator shows the uncapped estimate — confirm the applicable cap on the GST portal.
Does PocketGST file returns or pay the fee?+
No. PocketGST prepares GSTR-1/GSTR-3B helper reports so filing is faster, but you pay any late fee and interest and file on the official GST portal.