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Spot a rate that needs updating, a calculation that looks off, or just want to say hi? Drop us a line — everything on this site runs in your browser, so there is no support account to manage.

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Use this for bug reports, rate corrections, accessibility issues, partnership enquiries or feedback.

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Include the page URL, your inputs, expected result and what you saw.
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For content requests, tell us which country and tax type you'd like covered.

Need a calculator right now?

Indian GST Calculator

Slab rates with CGST/SGST/IGST split.

Reverse GST Calculator

Extract GST from inclusive prices.

GST Invoice Generator

Client-side invoice with tax split — print or save as PDF.