Calculator Input
Use this flexible setup for payment delay, filing delay, fixed penalty, percentage penalty, late fee cap, and daily-interest based calculations.
Example Data Table
| Business | GST Due | Due Date | Payment Date | Filing Date | Payment Delay | Filing Delay | Total Charges | Total Payable |
|---|---|---|---|---|---|---|---|---|
| ABC Traders | INR 25,000.00 | 2026-02-10 | 2026-02-22 | 2026-02-25 | 12 days | 15 days | INR 4,397.95 | INR 29,397.95 |
Example assumes a 10% percentage penalty, 18% annual interest, INR 500 fixed penalty, INR 50 daily late fee, and INR 1,000 late fee cap.
Formula Used
max(0, Payment Date - Due Date - Grace Days)
max(0, Filing Date - Due Date - Grace Days)
GST Due Amount × (Penalty Rate ÷ 100)
Applied only when payment or filing is late.
GST Due Amount × (Annual Interest Rate ÷ 100) × (Payment Late Days ÷ 365)
min(Filing Late Days × Late Fee Per Day, Maximum Late Fee)
Percentage Penalty + Interest + Fixed Penalty + Late Fee
GST Due Amount + Total Charges
How to Use This Calculator
- Enter the business name and your preferred currency label.
- Provide the outstanding GST due amount.
- Enter the due date, actual payment date, and actual filing date.
- Set any grace days allowed under your internal or legal process.
- Enter the percentage penalty rate, annual interest rate, fixed penalty, daily late fee, and late fee cap.
- Choose the decimal precision you want in the report.
- Press the calculate button to display the result above the form.
- Use the CSV or PDF buttons to export the current result summary.
Frequently Asked Questions
1. What does this calculator estimate?
It estimates GST-related delay charges using configurable penalty rates, late fees, fixed penalties, and interest. It also separates payment delay from filing delay for clearer reporting.
2. Does this calculator follow one country’s GST law?
No. It is designed as a flexible estimator. You can enter the rates and limits that match your tax authority or advisor’s guidance for your filing period.
3. Why are payment date and filing date separate?
Some businesses pay tax and submit returns on different days. Keeping them separate helps estimate interest on payment delay and late fees on filing delay more accurately.
4. How is interest calculated here?
The calculator uses simple daily interest based on the annual rate, GST due amount, and payment late days. It does not use compounding in this version.
5. When is the percentage penalty applied?
The percentage penalty is applied when either payment or filing is late after grace days. This keeps the setup simple and suitable for broad planning use.
6. What happens if there is no delay?
If payment and filing both happen on time, the calculator sets delay days to zero and does not apply penalty, interest, fixed penalty, or late fee.
7. Why is there a maximum late fee field?
Many tax setups cap the late fee after a limit. This field prevents the daily late fee from exceeding the maximum amount you specify.
8. Can I export the result?
Yes. After calculation, use the CSV button for spreadsheet-friendly output or the PDF button for a shareable report version of the current result.