Calculator
Work out your GST interest
Pick the situation, enter the amount and the two dates, and it shows the days of delay, the amount interest is charged on, and the figure rounded the way the law requires.
| Amount interest is charged on | |
|---|---|
| Days of delay | |
| Rate | |
| Interest (exact) | |
| Interest payable (rounded to the rupee) |
An estimate under section 50 of the CGST Act and Rule 88B. It is not tax advice. Late fees and penalties are not included. Need help bringing returns up to date? See our GST return filing service.
Method
How the interest is worked out
Interest is simple interest for each day the tax stays unpaid. The clock starts on the day after the due date, so tax paid on the due date carries no interest, and tax paid one day later carries one day's interest. The calculator counts actual calendar days, including 29 February in a leap year, and divides by 365.
| Situation | Interest is charged on | Period | Rate used |
|---|---|---|---|
| Return filed late | Only the tax paid from the electronic cash ledger. Tax set off against input tax credit is left out | Due date of the return to the filing date | 18% a year |
| Tax paid late or short in other cases | The unpaid tax | Due date to payment date | 18% a year |
The rules come from section 50 of the CGST Act and Rule 88B of the CGST Rules. The final amount is rounded to the nearest rupee, with 50 paise or more rounded up, as section 170 requires. The 18% rate for section 50(1) is fixed by Notification No. 13/2017–Central Tax dated 28 June 2017.
A worked example: ₹1,00,000 of GST due on 20 April and paid on 20 May is 30 days late. 1,00,000 × 18% × 30 ÷ 365 comes to ₹1,479.45, so ₹1,479 is payable.
If your returns have fallen behind and you would rather have them brought up to date, our GST return filing service can prepare and file them for you.
Limits
What this calculator does not cover
- Late fees for filing a return after the due date. These are a separate charge from interest.
- Penalties, and interest on tax demanded in a notice under sections 73, 74 or 74A. The cash-ledger relief for late returns does not apply once such proceedings have started.
- Interest the government pays on delayed refunds.
- Interest on input tax credit wrongly availed and used. We confirm the current position for your case.
This calculator gives an estimate only. It is not tax advice. Confirm the figure on the GST portal, or with your tax adviser, before you pay.
Is interest charged on tax I paid using input tax credit?
Not where the tax was declared in a return filed late. In that case interest applies only to the part paid in cash through the electronic cash ledger. Enter only that cash portion as the amount.
I had money in my cash ledger before the due date but filed late. Is that also charged?
Cash credited to the ledger on or before the due date, and left there until it was used to pay the tax in the return, is not counted. Enter it in the "cash already in the cash ledger" field, and the calculator will leave it out.
Should I work out CGST, SGST and IGST separately?
Interest is payable under each head. If the dates are the same for every head you can enter the total. Otherwise run the calculator once for each head, so you know how much to pay under each one.
Where do I enter the due date?
Type the actual due date for your return or payment. Due dates differ by return and can be extended, so the calculator does not assume one. Check the current date on the GST portal.
Is Complianto a government body or a CA firm?
Neither. Complianto is a compliance facilitation platform operated by Mentorcorp Private Limited. You can also file and pay directly on the official GST portal without our fee.
