GST Late Fees and Interest: How Much You Actually Owe for a Late Return
Miss a GST return deadline and two separate charges start running at the same time: a late fee for filing the return itself, and interest for paying the tax late, and they're calculated differently, capped differently, and in the case of interest, can apply at two different rates depending on what actually happened.
Here's exactly how much each one costs, when the higher interest rate kicks in, and how to work out what you owe if you're already past the due date.
Quick answer
Filing GSTR-1 or GSTR-3B late costs a late fee of ₹50 a day (₹25 CGST + ₹25 SGST) for a return with tax payable, or ₹20 a day for a nil return, both capped based on your annual turnover. Separately, paying the tax itself late attracts interest at 18% per annum on the amount paid late, calculated from the day after the due date until you actually pay. A higher 24% rate applies only in the narrower case of wrongly claimed input tax credit that was actually used. Both the late fee and the interest must be paid in cash, not through input tax credit.
Who this applies to
This applies to any GST-registered person who files GSTR-1 or GSTR-3B after the due date, or who pays the tax shown in GSTR-3B after the due date, whether that's a few days late or several months. It doesn't matter whether the delay was accidental, caused by a cash flow problem, or a portal issue on your end. If you're not sure whether you even need to be registered and filing in the first place, start with do freelancers need GST registration.
Late fee: how much, and how it's capped
The late fee under Section 47 of the CGST Act runs per day of delay, separately for CGST and SGST/UTGST, starting the day after the due date and continuing until you actually file. It's capped by your aggregate annual turnover in the previous financial year:
| Aggregate turnover (previous FY) | Daily late fee | Maximum cap per return |
|---|---|---|
| Up to ₹1.5 crore | ₹50/day (₹25 + ₹25) | ₹2,000 |
| ₹1.5 crore to ₹5 crore | ₹50/day (₹25 + ₹25) | ₹5,000 |
| Above ₹5 crore | ₹50/day (₹25 + ₹25) | ₹10,000 |
A nil return (no outward supplies and no tax payable for the period) gets a lower daily rate of ₹20 (₹10 CGST + ₹10 SGST), capped at just ₹500 total, regardless of turnover.
The cap applies per return, per tax period, so a business that's three months late on three separate GSTR-3B filings faces the cap three times over, not once.
Interest: 18% and 24%, and when each applies
Interest is a separate charge from the late fee, and it's calculated on the tax itself rather than on the act of filing late. Under Section 50(1) of the CGST Act, paying tax after the due date attracts simple interest at 18% per annum, running from the day after the due date to the date of actual payment. It's charged on the net tax liability you paid late (the amount actually settled through the cash ledger), not on your gross output tax before adjusting for any input tax credit you're entitled to.
A separate, higher rate exists under Section 50(3): 24% per annum on input tax credit that was wrongly availed and utilised to pay a tax liability. This is narrower than it sounds. Following the Finance Act 2022 amendment, the 24% rate applies only when the wrongly claimed credit was actually used. If it was claimed in error but reversed before ever being used to discharge a liability, this provision generally doesn't apply the way it would have under the pre-2022 wording.
In practical terms: a routine late payment of tax you genuinely owed is an 18% problem. A wrongly claimed credit that you've already used to pay tax is a 24% problem, and a more serious one to sort out quickly.
How late fee and interest actually get paid
Both the late fee and the interest are payable in cash through the electronic cash ledger. Neither can be discharged using input tax credit, even if you have credit sitting unused in your electronic credit ledger. The GST portal computes a system-generated interest figure on filing GSTR-3B, and the late fee is generally added automatically based on the delay before the return can be filed at all.
Worked example
A business with ₹3 crore annual turnover has a GSTR-3B due on the 20th, with ₹40,000 of net tax payable after adjusting input tax credit. It actually files and pays 25 days late.
- Late fee: ₹50/day × 25 days = ₹1,250, under the ₹5,000 cap for this turnover band, so the full ₹1,250 is payable.
- Interest: 18% per annum on ₹40,000 for 25 days = ₹40,000 × 18% × (25 ÷ 365) ≈ ₹493.
- Total extra cost of the delay: roughly ₹1,743, on top of the ₹40,000 tax itself, both payable in cash.
Illustrative figures to show how the two charges stack. Your own late fee cap depends on your actual turnover band, and the exact interest depends on your precise number of days late.
Common mistakes
- Assuming the late fee and interest are the same charge. They're calculated differently and both apply independently. Clearing one doesn't touch the other.
- Trying to pay either using input tax credit. Both must go through the cash ledger; ITC only ever pays output tax.
- Assuming 24% interest applies to any ITC mistake. It only applies where the wrongly claimed credit was actually utilised. Reversing an error before using it is a materially different, and usually cheaper, situation.
- Ignoring nil returns. Filing nothing when you have nothing to report still triggers the ₹20/day, ₹500-capped nil late fee. It isn't automatically waived just because no tax was due.