What this tool does
Reverse GST calculator opens the gst calculator tool with this setting ready, so you only fill in your details.
Shops, freelancers and buyers often need to know the GST inside a price. Add GST gives the final price from a price without tax. Remove GST works backwards from a price that already includes GST, the way a bill total is shown. For a sale within your state, the GST is split equally into CGST and SGST; for a sale to another state, it is all IGST. Since 22 September 2025 the main GST rates are 5%, 18% and 40%.
How to use it
- Choose Add GST or Remove GST.
- Enter the price.
- Pick the GST rate or type your own.
- Read the GST and the CGST, SGST or IGST split.
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Questions people ask
How do I calculate GST on a price?
Multiply the price by the rate. 18% GST on ₹1,000 is ₹180, so the price with GST is ₹1,180.
How do I remove GST from a total (reverse GST)?
Divide the total by 1 + rate. For ₹1,180 at 18%: 1,180 ÷ 1.18 = ₹1,000 before GST, and ₹180 is the GST.
What are the GST rates now?
Since 22 September 2025 most goods and services are at 5% or 18%, with 40% for a few luxury and sin goods. Gold is 3%.
When is it CGST + SGST and when IGST?
Within the same state the GST is split half CGST and half SGST. To another state it is charged as IGST.