Calculator

GST calculator

Add or remove GST, split CGST / SGST / IGST, interest and late fees.

GST amount
₹

Total including GST

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Value before GST
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GST at
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CGST ()
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SGST ()
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IGST
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Interest on late GST payment
₹

Interest payable

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Days of delay
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Tax plus interest
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Interest at 18% a year runs from the day after the due date to the date of payment. Late fees for returns are separate.

Late fee for GST returns
₹

Late fee payable

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Days late
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Rate
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Maximum for this return
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CGST share
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SGST share
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Late fee is paid in cash and cannot be set off against input tax credit. GSTR-9 caps are a percentage of turnover in the state.

This calculator gives an estimate for general information, based on the law as reviewed on 14 October 2026. It does not cover every exemption, special rate or condition. Send an enquiry for advice on your facts.

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