GST calculator

Add GST to a price before tax, or work out how much GST is inside a price that already includes it. Within a state the tax splits equally into CGST and SGST; between states it is IGST.

Price including GST
₹11,800
GST amount₹1,800
CGST₹900
SGST₹900
Price before GST₹10,000

Worked example

A ₹10,000 service at 18%: GST is ₹1,800, total ₹11,800. Within the state that is ₹900 CGST and ₹900 SGST. If a bill shows ₹11,800 including 18% GST, the price before GST is ₹11,800 ÷ 1.18 = ₹10,000.

Check the exact rate for your item or service in the CBIC rate schedule. This is a calculator, not tax advice.

Questions people ask

What are the GST rates now?

Since 22 September 2025 (GST 2.0), most goods and services are taxed at 5% or 18%, with 40% for a small list of luxury and sin goods. Some items are exempt (nil), and special rates remain, such as 3% on gold and 0.25% on rough diamonds.

How do I remove GST from a price?

Price before GST = price including GST ÷ (1 + rate ÷ 100). For 18%, divide by 1.18. GST is the difference.

CGST + SGST or IGST?

A sale within one state attracts CGST and SGST, each half the rate. A sale to another state attracts IGST at the full rate.

Need help with tax, GST or your accounts?

A tax professional can call you back. Asking is free.

Get help

More calculators

GST number checkerCheck a GSTIN's format and check digit, and see the state codes.PAN format checkerCheck a PAN's structure and see what the 4th letter means.MICR code lookupFind the bank branch behind the 9-digit MICR code on a cheque.EMI calculatorMonthly instalment, total interest and repayment schedule for any loan.Home loan EMIEMI, interest over 20 to 30 years, and the tax benefit in the old regime.Car loan EMIEMI for new and used car loans over 1 to 7 years.

Results are estimates for information only, not financial or tax advice. Rates, rules and limits change, so check with your bank, employer or a qualified adviser before you decide.