Free Tools

GST Interest Calculator

Estimate the interest owed when GST tax is paid after the due date, at the standard 18% per annum rate.

Tax Amount Paid Late (₹)Due DateActual Payment Date

Based on the standard 18% per annum interest rate on delayed GST tax payment, calculated on a simple daily basis.

Official sources

The rules, rates and deadlines described here are set by the government and do change. This is where they are officially published:

GST Acts, rules and notifications, Central Board of Indirect Taxes and Customs (CBIC)
GST Portal, Goods and Services Tax Network (GSTN)

Need help beyond a calculation? Talk to a GST expert.