GST Calculator
Calculate GST for tax-exclusive or tax-inclusive prices.
Updates instantly as you change assumptions.
How this tool helps
Calculate GST for tax-exclusive or tax-inclusive prices and see the base amount, GST component and final amount.
- Choose whether the entered amount already includes GST.
- Enter the applicable GST rate for your transaction.
- Use invoice and tax rules applicable to your business for final reporting.
Worked example: Add GST to a tax-exclusive price
- Base price: ₹10,000
- GST rate: 18%
- Amount already includes GST: No
GST is ₹1,800 and the final amount is ₹11,800. If ₹11,800 is entered as an inclusive amount at 18%, the calculator separates the same ₹10,000 base and ₹1,800 tax.
The calculator applies the rate you enter; it does not decide which GST rate or place-of-supply treatment applies.
Frequently asked questions
What is inclusive GST?
An inclusive amount already contains GST, so the calculator separates the tax from the total.
What is exclusive GST?
An exclusive amount is the pre-tax base to which GST is added.
Does this determine which GST rate applies?
No. You must enter the correct rate for the relevant goods or services.
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