GST Penalty Calculator — Late Fee & Interest on Delayed Filing
This calculator computes GST late fee and interest for delayed filing of GSTR-1, GSTR-3B, GSTR-4, GSTR-9, and CMP-08. Late fee ranges from ₹20/day (nil returns) to ₹200/day (GSTR-9), with turnover-based caps. Interest is 18% p.a. on outstanding tax. Enter your return type, due date, filing date, turnover, and tax liability — get instant penalty breakup with CGST/SGST split.
Calculate GST Late Fee & Interest
How to Use the GST Penalty Calculator
This free tool calculates the exact late fee and interest payable for delayed GST return filing. It covers all major return types with turnover-based caps as per the latest CBIC notifications.
Step 1 — Select Return Type and Turnover
Choose the GST return type (GSTR-1, 3B, 4, 9, or CMP-08) and your aggregate turnover category. Turnover determines the maximum late fee cap applicable to your business.
Step 2 — Choose Nil or Regular
Nil returns (no sales/tax liability) attract lower late fees of ₹20/day compared to ₹50/day for regular returns. A return with purchases but no sales is still considered a nil return for late fee purposes.
Step 3 — Enter Dates
Enter the original due date and the actual or expected filing date. The tool calculates the exact number of days of delay. For GSTR-3B, the due date is typically the 20th of the following month (or 22nd/24th for QRMP). Check the GST portal for your specific due dates.
Step 4 — Enter Tax Liability
Enter the net tax liability (after adjusting ITC) for interest calculation. Interest at 18% p.a. under Section 50 of the CGST Act is charged on the outstanding tax amount from the due date until payment.
CA Tip: Always file returns sequentially — you cannot file a new period’s return without clearing late fees for previous periods. If you have multiple pending returns, calculate penalties for each period separately and plan cash flow accordingly. The ICAI recommends filing the oldest pending return first.
GST Late Fee Rates — All Return Types
Late fees are charged under Section 47 of the CGST Act. The rates and caps vary by return type and taxpayer turnover:
| Return | Regular (per day) | Nil (per day) | Max Cap |
|---|---|---|---|
| GSTR-3B | ₹50 (₹25+₹25) | ₹20 (₹10+₹10) | ₹2K / ₹5K / ₹10K* |
| GSTR-1 | ₹50 (₹25+₹25) | ₹20 (₹10+₹10) | ₹5,000 |
| GSTR-4 | ₹50 (₹25+₹25) | ₹20 (₹10+₹10) | ₹2,000 |
| CMP-08 | ₹50 (₹25+₹25) | ₹20 (₹10+₹10) | ₹10,000 |
| GSTR-9 | ₹200 (₹100+₹100) | — | 0.5% of turnover |
* GSTR-3B cap: ₹2,000 (turnover ≤ ₹1.5 Cr), ₹5,000 (₹1.5–5 Cr), ₹10,000 (> ₹5 Cr). Nil cap: ₹500.
Interest on Late GST Payment — Section 50
Interest under Section 50 of the CGST Act is charged on the net cash tax liability (after ITC adjustment) for the number of days of delay:
Interest = Net Tax Liability × 18% × (Days of Delay ÷ 365)
Example:
Tax = ₹1,00,000 | Delay = 45 days
Interest = 1,00,000 × 0.18 × (45/365) = ₹2,219
For excess ITC claims, interest is charged at 24% p.a. under Section 50(3). This higher rate applies when a taxpayer claims more ITC than entitled and later reverses it.
Critical: Interest is calculated on net cash tax liability, not gross tax. If your total tax is ₹5 lakh but you have ₹4 lakh ITC, interest applies only on the ₹1 lakh cash component. However, if ITC is disallowed later, interest applies on the disallowed amount from the original due date at 24%.
Consequences of Non-Filing and How to Avoid Penalties
Beyond late fees and interest, non-filing of GST returns triggers several adverse consequences:
- E-Way Bill blocking: After 2 consecutive months of GSTR-3B non-filing, E-Way Bill generation is blocked — halting goods transportation
- Suo motu cancellation: 6 months of continuous non-filing can trigger cancellation under Section 29 via REG-17 notice
- Best judgment assessment: Under Section 62, the officer can assess tax liability if returns are not filed after notice under Section 46
- Sequential filing block: New returns cannot be filed until all prior periods’ returns and late fees are cleared
- ITC blocking: Your buyers cannot claim ITC on purchases from you if your GSTR-1 is not filed
How to Minimise Penalties
File returns on time — set reminders 5 days before due dates. Use the GST Due Date Tracker to stay on top of deadlines. If filing is delayed, pay tax liability by the due date even if the return is filed later — this reduces the interest component. For nil returns, file on time to avoid the ₹20/day fee that adds up quickly.
Expert Tip: Monitor CBIC notifications for amnesty schemes and late fee waivers. The government periodically offers reduced late fee windows. Our CA team can help you file pending returns and minimise penalties. Talk to a CA now →
Pending GST returns? Our CAs handle bulk return filing, penalty calculation, and compliance restoration for businesses across India. Talk to a CA today →
