GST Penalties, Late Fees & Interest

GST compliance failures carry three distinct financial consequences that are often confused with each other: late fees for filing late, interest for paying late, and penalties for more serious violations. Use the late fee calculator for a quick estimate of the first two.

Late fees

Charged per day of delay in filing a return, split evenly between CGST and SGST. As a standard reference point: ₹50/day (₹25 CGST + ₹25 SGST) for a regular return with tax liability, and ₹20/day (₹10 + ₹10) for a Nil return, each subject to a maximum cap. These caps have been revised by notification more than once, including reduced caps for smaller taxpayers in some periods — treat the numbers here as the standard baseline and confirm the current cap before assuming it applies to your filing.

Interest

Interest applies to tax paid late, calculated on the outstanding tax amount for each day of delay, at a rate set under Section 50 of the CGST Act — commonly cited at 18% per annum for delayed payment of tax, and a higher rate (commonly cited at 24% per annum) for cases like an excess or incorrect Input Tax Credit claim that later needs to be reversed. Interest is calculated on the net tax liability, not on the gross output tax, since the 2019 amendment clarified this point.

Penalties

Beyond late fees and interest, penalties apply to more serious lapses — not registering when required, deliberately under-reporting tax liability, issuing invoices without an actual supply, or fraud. Penalty amounts vary significantly by the nature of the violation, ranging from a flat amount to a percentage of the tax evaded, and can include prosecution in the most serious fraud cases. This is a different, more serious category than simply filing a return a few days late.

Why timely filing matters beyond the fee itself

A GSTR-3B for a period generally cannot be filed until the previous period's return is filed, so a missed filing can cascade — delaying every subsequent period's filing (and its own late fee) until the backlog clears. It can also block a supplier's customers from claiming ITC on time, straining business relationships beyond the direct cost to the late filer.

Key takeaways

• Late fees (per day, capped) and interest (percentage on unpaid tax) are separate charges, both triggered by a missed deadline.
• Interest is calculated on net tax liability, and rates/caps have changed by notification before — verify current figures.
• Missing one period's filing can block later periods from being filed, compounding the delay.