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Invoice GST Calculator

Work out GST at any rate, and split it into CGST, SGST or IGST for India.

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Quick Tool Overview

The Invoice GST Calculator works at every Indian slab rate and the flat rates used in Australia, New Zealand, Singapore and Canada, splits Indian GST into CGST and SGST or shows it as IGST, and handles compensation cess.

What it does
Adds or removes GST and splits it
You give it
An amount, a rate and the type of supply
You get back
The split exactly as it goes on the invoice
Best for
India, Australia, NZ, Singapore and Canada
Invoice Tools Free, unlimited use No sign-up Runs in your browser

About the Invoice GST Calculator

GST arithmetic is the same everywhere — add the rate, or divide it out of an inclusive price — but the presentation differs, and in India the presentation is the part that matters. Within one state a rate splits into CGST and SGST at half each; across state lines it is a single IGST at the full rate. The total is identical, the invoice is not, and the return certainly is not.

This calculates both, at the Indian slab rates of 0%, 0.25%, 3%, 5%, 12%, 18% and 28%, and at the flat rates used in Australia, New Zealand, Singapore and Canada. It works in both directions, so a GST-inclusive price entered as a gross figure is split correctly rather than multiplied.

Cess is handled too, where it applies — a compensation cess on top of the GST rate for tobacco, aerated drinks, coal and larger cars, calculated on the taxable value rather than on the GST-inclusive figure.

Key features of the Invoice GST Calculator

CGST/SGST or IGST

Decided by whether the place of supply is in-state.

Every Indian slab

0, 0.25, 3, 5, 12, 18 and 28 per cent.

Compensation cess

Calculated on the taxable value, not the GST-inclusive figure.

Both directions

Inclusive prices divided out rather than multiplied.

Other GST countries

Australia 10%, New Zealand 15%, Singapore 9%, Canada 5%.

How to use the Invoice GST Calculator

  1. 1

    Enter the amount

    Net or GST-inclusive; both directions are worked out.

  2. 2

    Pick the rate

    Indian slab rates, or the flat rate in Australia, New Zealand, Singapore or Canada.

  3. 3

    Choose the supply

    Same state splits into CGST and SGST; interstate shows one IGST line.

  4. 4

    Add cess if it applies

    Calculated on the taxable value, not on the GST-inclusive figure.

  5. 5

    Copy the breakdown

    Exactly as it has to appear on the invoice.

Frequently asked questions

When the place of supply is in a different state or union territory from the supplier, and for imports and exports. Within one state the same rate splits into CGST and SGST at half each.

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