GST · EDUCATIONAL TOOL
GST Interest & Late Fee Calculator
Estimate standard delayed-return interest and GSTR-3B late fees, including the eligible cash-ledger adjustment and separately dated unpaid tax.
Educational estimates; verify the applicable period, conditions and official sources. Server calculation: inputs are sent securely to this website for calculation. The GST module does not retain the entered tax values. Do not enter personal identifiers.
UNDERSTAND THE CALCULATION
How to use GST Interest & Late Fee Calculator
Explore supported cash-ledger interest and return late-fee scenarios.
Inputs and definitions
Return and period, verified due date, payment date, tax-head liabilities and applicable cash-ledger/payment history.
Method and formula
Determine the supported interest base and day count, then apply the annual rate on a daily basis. Late fees are a separate calculation with their own conditions and caps.
Illustrative example
An illustrative ₹10,000 interest base for ten days at a confirmed 18% annual rate gives about ₹49.32 using 365 days. Cash-ledger adjustments can change the eligible base.
COMMON QUESTIONS
Before you use the result.
Are interest and late fee the same charge?
No. Interest relates to a prescribed tax/payment base and time period. Late fee relates to delayed return filing and has separate daily amounts, caps and possible relief conditions.
Why does the cash ledger matter?
The legally relevant cash balance and deposit/payment dates can affect supported interest treatment. Enter the actual dated facts; a later deposit is not assumed to have been available earlier.
Can I rely on a normal due date after an extension?
No. Confirm the applicable notified due date and any class-, period- or location-specific relief. The tool’s coverage and supplied date do not establish every exceptional extension.
Read these answers with the selected period, calculation scope and official sources below.
Scope and limitations
Review the relevant period, supplied facts, official sources and any conditions beside the result.
These examples explain the method. The interactive result depends on the selected facts and period, and is not a filing or an eligibility confirmation.
GST inputs are sent for calculation and are not saved as client records by the GST module. Privacy details