GST Interest Calculator
Calculate the interest payable for delayed GST payment, per Section 50 of the CGST Act.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter your tax amount and days delayed to calculate GST late payment interest.
₹
days
%
Your result
₹1,479.45
Interest payable
Total payable (tax + interest)₹1,01,479.45
AI explanation
Formula
Interest = tax amount × 18% p.a. × days delayed / 365Worked example
₹1L tax, 30 days delayed, 18% p.a.
| Field | Value |
|---|---|
| Tax amount | 100000 |
| Days delayed | 30 |
| Interest rate | 18 |
| Interest payable | 1479.45 |
| Total payable (tax + interest) | 101479.45 |
Assumptions
- Uses the standard 18% per annum rate under Section 50 of the CGST Act for delayed GST payment. A higher 24% rate applies specifically to excess Input Tax Credit claims or reductions in output tax liability, not modeled here.
- Informational only.
Frequently asked questions
What is the interest rate for delayed GST payment?
18% per annum under Section 50 of the CGST Act for delayed payment of tax, calculated from the day after the due date until the actual date of payment.
Is there a higher interest rate for GST offenses?
Yes — a 24% per annum rate applies to cases involving excess claim of Input Tax Credit or undue reduction of output tax liability, separate from the standard 18% delay rate.
How is the interest period calculated?
From the day immediately after the due date until the actual date of payment — this calculator takes the number of days delayed as a direct input.
Related calculators
Sources
- Central Goods and Services Tax Act, 2017 — Section 50 — Central Board of Indirect Taxes and Customs (CBIC). Effective 01-07-2017, reviewed 13-09-2026.
This calculator provides a general estimate only and does not constitute tax advice.
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