Free tool
GST calculator
Add GST to a price, or take the GST out of a price that already includes it. See the CGST, SGST or IGST split. No sign-up needed.
Price including GST
₹1,180.00
₹1,000.00 plus 18% GST.
- Price before GST
- ₹1,000.00
- CGST at 9%
- ₹90.00
- SGST at 9%
- ₹90.00
- Total GST
- ₹180.00
- Price including GST
- ₹1,180.00
Comparing supplier quotes? GST is only one part of the cost. Count freight, minimum order and GST credit too.
How to add GST to a price
Multiply the price by the GST rate to get the tax, then add it on. At 18%, a price of ₹1,000 has ₹180 of GST, so the buyer pays ₹1,180. A quote that says exclusive of GST, plus GST or GST extra works this way: the tax is added on top of the rate you see.
How to remove GST from an inclusive price
Divide the price by 1 plus the rate. At 18%, divide by 1.18: a price of ₹1,180 inclusive of GST is ₹1,000 before tax, with ₹180 of GST inside it. A common mistake is to take 18% off the inclusive price, which gives ₹967.60 and understates the price.
CGST, SGST and IGST
When the seller and buyer are in the same state, the GST is split in half: one half is CGST for the central government and the other is SGST for the state. On an 18% item that is 9% each. When they are in different states, the full amount is charged as IGST. The total you pay is the same either way.
Which GST rate applies?
Since September 2025 most goods and services are taxed at 5% or 18%, with 40% for a short list of luxury and sin goods. A few items have special rates, such as 3% on gold and silver and 0.25% on rough diamonds; choose Other to enter those. The rate depends on the item’s HSN or SAC code, so check it on the supplier’s invoice.
If you are buying for a business
A GST-registered buyer can usually claim the GST back as input tax credit, so the price before GST is the real cost. That is why a quote at ₹115 including GST can be cheaper than one at ₹100 plus GST. Read GST inclusive vs exclusive prices, or use the landed cost calculator to count freight and minimum order as well. This is general information, not tax advice; confirm GST treatment with your accountant.