GST calculator
Add GST to a price, or take it out of an amount that already includes it. Updated for the 5%, 18% and 40% slabs in force since 22 September 2025.
Enter the price. Commas are fine.
Not sure of your rate? Check the HSN/SAC code of your item. Use Custom for older invoices (12% or 28%).
Tax breakdown
Need a GST-ready website your business?We build fast websites for Indian businesses.
Get a free quoteHow GST is calculated
To add GST to a price that excludes it:
Total = Amount + GST
To remove GST from a price that includes it:
GST = Amount − Original price
For sales within one state, GST is split equally into CGST and SGST. For sales between states, the full amount is charged as IGST.
Current GST slabs in India
| Rate | Applies to |
|---|---|
| 0% | Exempt and nil-rated items |
| 5% | Essentials and many everyday goods |
| 18% | Standard rate: most goods and services |
| 40% | Luxury and sin goods |
The earlier 12% and 28% slabs were largely removed from 22 September 2025.
Questions
What is the difference between CGST, SGST and IGST?
CGST goes to the central government and SGST to the state government, each at half the total rate. IGST is the full rate, charged on sales between states.
Is my price GST-inclusive or exclusive?
If the tag price is the final amount a customer pays, it includes GST. If tax is added on top at billing, it excludes GST.
This calculator gives estimates for general use. Confirm the rate for your item or service with the GST portal or your chartered accountant.