Free GST Late Fee Calculator
Missing a GST filing deadline can cost you hundreds or thousands of rupees. Manually calculating the exact penalty is confusing and error-prone. Use this free GST late fee calculator to know your exact penalty in seconds - no formulas, no guesswork.
Selected month due date: 20 April 2026.
Enter CGST, SGST and IGST directly. SGST will match CGST when it is blank.
Minimum cash balance in your Electronic Cash Ledger between due date and filing date. Leave blank (or ₹0) if unknown — interest will be on the full tax amount.
Late Fee (Section 47)
₹0
Interest (Section 50)
₹0.00
Total Penalty
₹0.00
(₹0 − ₹0) × 18% × 0 / 365 = ₹0 × 0.18 × 0 / 365 = ₹0
0 days × ₹50 = ₹0 (CGST: ₹0 + SGST: ₹0)
How to use the GST Late Fee Calculator?
Get your exact GST late fee and interest in under 30 seconds. Follow these simple steps.
Select Return Type and Due Month
Choose whether you are filing GSTR-3B or GSTR-1. Then select the month for which the return was due. The calculator will automatically determine the exact due date (20th for GSTR-3B, 11th for GSTR-1).
Enter Your Actual Filing Date
Pick the date on which you actually filed or plan to file the return. The calculator will compute the number of days of delay from the due date to this date.
Mark NIL Return (If Applicable)
If your return has no tax liability, check the NIL Return box. This applies a lower rate of Rs. 20 per day and caps the total late fee at Rs. 500 as per GST law.
Enter Tax Amounts for Interest
For non-NIL returns, enter your CGST, SGST, and IGST amounts. The calculator uses these to compute Section 50 interest at 18% per annum. You can also enter your ECL cash balance to use the Rule 88B deduction.
Updated as of April 2026
GST Late Fee and Interest Rules You Must Know
This calculator follows the current GST regulations as of April 2026. We will update this page if Govt issues new notifications or changes the rates. Here is a clear breakdown of the rules.
Late Fee - Section 47, CGST Act
A late fee is a fixed daily penalty charged for every day you delay filing your GST return after the due date. It does not depend on your tax amount. It only depends on the number of days of delay.
| Return Type | CGST | SGST | Total/Day |
|---|---|---|---|
| Regular Return (with tax) | Rs. 25/day | Rs. 25/day | Rs. 50/day |
| NIL Return (zero tax) | Rs. 10/day | Rs. 10/day | Rs. 20/day |
Maximum Late Fee Cap
No matter how many days you delay, the late fee cannot go above the statutory cap. The total late fee is capped under both CGST Act and SGST Act separately.
| Return Type | CGST Cap | SGST Cap | Total Cap |
|---|---|---|---|
| Regular Return | Rs. 5,000 | Rs. 5,000 | Rs. 10,000 |
| NIL Return | Rs. 250 | Rs. 250 | Rs. 500 |
IGST is not applicable for late fees. Late fees are only levied under CGST and SGST Acts.
Interest on Tax - Section 50, CGST Act
Interest is charged when you have an outstanding tax liability and you delay paying it. Unlike late fees, interest is calculated on the tax amount. The rate is 18% per annum.
Interest is not applicable for NIL returns since there is no tax liability. The result is rounded to the nearest rupee as per standard GST portal behaviour.
Rule 88B - ECL Deduction (Effective January 2026)
Rule 88B, effective January 2026, allows a deduction from the interest base. If you maintained a minimum cash balance in your Electronic Cash Ledger (ECL) during the delay period, that amount is excluded from the interest calculation.
If you are unsure of your ECL balance, leave it blank. The calculator will default to Rs. 0 and compute interest on the full tax amount - this is the safest, most conservative estimate.
Disclaimer: This calculator reflects GST regulations as of April 2026 including Notification 19/2021-CT, Section 47, Section 50, and Rule 88B of the CGST Act. Zubizi will update this tool if the Govt. issues revised notifications or rate changes. This tool is for informational purposes only. For final liability, consult a qualified CA or GST practitioner.
Why Use Our GST Late Fee Calculator?
Our GST Late Fee Calculator is built for Indian businesses and tax professionals. Get accurate GST penalty calculations instantly - no manual formulas, no spreadsheets, no errors.
Live Calculation - No Button Needed
This GST Late Fee Calculator updates your results the moment you change any field. There is no submit button. It re-computes your late fee and interest in real time as you type tax amounts, select dates, or toggle return type. You save time and see results instantly.
Accurate CGST and SGST Split
The calculator correctly divides the late fee between CGST and SGST as per law. Regular returns are split at Rs. 25 per day each. NIL returns are split at Rs. 10 per day each. IGST is correctly excluded from late fees, as GST law mandates.
Covers Both Regular and NIL Returns
Whether you have a tax liability or are filing a NIL return, this GST Late Fee Calculator handles both. Regular returns attract Rs. 50 per day (capped at Rs. 10,000). NIL returns attract Rs. 20 per day (capped at Rs. 500). The correct rate is applied automatically.
NIL Return Support
For taxpayers with zero tax liability, the NIL return mode applies the correct legal rates automatically: Rs. 20 per day total split as Rs. 10 CGST and Rs. 10 SGST, with a maximum cap of Rs. 500 as per GST law.
Formula Transparency
Every result includes a plain-English formula breakdown showing exactly how the number was computed. You can verify the formula against the GST portal or share it with your CA. No black box calculations - full transparency at every step.
100% Free, No Signup, Fully Private
This GST Late Fee Calculator is completely free. No account needed. No data sent to any server. All calculations run inside your browser on your own device. Your tax amounts and filing details never leave your screen. Safe to use for sensitive business data.
Need More Than a GST Late Fee Calculator?
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Frequently Asked Questions
Common questions about GST late fee calculation and GST regulations.
