GST Calculator
Add or Remove GST
Work out the GST on a price, or take it out of a GST-inclusive amount, with the CGST, SGST and IGST split shown clearly.
Choose whether to add GST to an amount or remove it from a GST-inclusive amount, pick a rate and say whether the sale is within one state or between states. The calculator shows the amount before GST, the tax and the total, split into CGST and SGST or into IGST.
Your amount
Result
Rates and rules change, and the right rate depends on what you sell. Treat this as a quick estimate and confirm with your accountant or the official GST rate notifications before you invoice.
How GST works on an invoice
GST in India has standard rate slabs of 0%, 0.25%, 3%, 5%, 18% and 40%. Which one applies depends on what you sell, so check the rate for your product or service before invoicing.
When you sell within one state, the tax is split equally between the Centre (CGST) and the State (SGST, or UTGST in a Union Territory). When you sell between states, the whole amount is charged as IGST.
To remove GST from a price that already includes it, divide by one plus the rate. For example, a price of 11,800 that includes 18% GST has a base of 10,000.
If you sell online, see how we build e-commerce websites with tax-ready checkout.
Frequently Asked
Which GST rates does this calculator include?
It includes 0%, 0.25%, 3%, 5%, 18% and 40%, plus a custom rate field for anything else. Always confirm the rate that applies to your goods or services.
What is the difference between CGST, SGST and IGST?
CGST and SGST are charged on sales within the same state and are each half of the GST rate. IGST is charged on sales between states and equals the full rate.
How do I remove GST from a GST-inclusive price?
Select "Remove GST", enter the total price and the rate. The calculator divides the total by one plus the rate to find the base amount and the tax.
Is this calculator a substitute for professional advice?
No. It is for quick estimates. Rules, rates and exemptions change, so confirm with your accountant or the official notifications before you invoice.
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