GST Late Fee & Penalty Rules Explained (2026, with Tables)
GSTR-3B and GSTR-1 late fees, interest under Section 50, and penalty rules explained with current caps - plus a calculator to compute your exact late fee in seconds.
Missed a GSTR filing date? Two separate meters start running: a fixed late fee per day, and interest on any unpaid tax. Business owners routinely confuse the two - this guide separates them clearly and shows the current structure.
Note: GST provisions are amended frequently through notifications. Treat the figures below as the commonly applicable structure and verify the latest notification (or ask your CA) before filing.
Late fee: fixed per day, capped by turnover
Late fee applies per return, per day of delay, split equally between CGST and SGST. For normal (non-nil) GSTR-3B/GSTR-1 filings, the widely applicable structure has been:
| Case | Late Fee / Day | Maximum Cap |
|---|---|---|
| Nil return (no outward supplies / no tax) | ₹20 (₹10 CGST + ₹10 SGST) | ₹500 per return |
| Turnover up to ₹1.5 crore | ₹50 (₹25 + ₹25) | ₹2,000 per return |
| Turnover ₹1.5 – ₹5 crore | ₹50 (₹25 + ₹25) | ₹5,000 per return |
| Turnover above ₹5 crore | ₹50 (₹25 + ₹25) | ₹10,000 per return |
Commonly applicable late-fee structure - confirm current notification before filing
Interest: 18% per annum on unpaid tax
Separately from the late fee, Section 50 levies interest - commonly 18% per annum - on the tax paid late, calculated day-wise from the due date to the payment date on the net cash liability. Even a few days of delay on a large liability can cost more in interest than the late fee itself.
Worked example
Suppose a regular taxpayer (turnover ₹2 crore) files GSTR-3B 30 days late with ₹1,00,000 tax paid in cash. Late fee: 30 days × ₹50 = ₹1,500. Interest: ₹1,00,000 × 18% × 30/365 ≈ ₹1,479. Total damage ≈ ₹2,979 - roughly half from each meter. This is exactly the calculation our late-fee calculator automates.
How to avoid the trap entirely
- File nil returns on time too - the ₹500 cap still stings across months and delays e-way bill generation once returns lapse.
- Remember the monthly rhythm: GSTR-1 (11th) and GSTR-3B (20th, or 22nd/24th for QRMP states).
- If cash is short, file the return and pay what you can - filing stops the late fee meter; interest then applies only to the unpaid portion.
Compute your exact GSTR late fee and interest in seconds - just enter the due date and filing date.
Open GST Late Fee & Penalty CalculatorFrequently Asked Questions
Is late fee charged even for nil GST returns?
Yes - ₹20 per day (capped at ₹500 per return) applies to late nil filings for the commonly applicable structure. Filing on time is free; filing late never is.
What is the difference between late fee and penalty?
Late fee is the automatic per-day charge for delayed filing. Penalty is a separate levy for offences like fraud or suppression, imposed through proceedings - most routine late filers only face late fee plus interest.
Is interest calculated on gross or net tax liability?
On the net cash liability (after ITC set-off) for delayed filing, as per the amended Section 50 position. Confirm your specific case with a professional.