Result
Turn on JavaScript to use the calculator. The worked examples below show the method.
This is an estimate for guidance. Rates, limits and thresholds change by notification, and the right figure depends on your case. Last reviewed November 2026.
Method
How it is worked out
- GST on an amount without tax: GST = amount × rate ÷ 100. Total = amount + GST.
- Amount including GST: amount without GST = total ÷ (1 + rate ÷ 100). GST = total − amount without GST.
- Within one state, GST is split equally into CGST and SGST. Between states, the whole amount is IGST.
- The current structure has two main rates, 5% and 18%, a 40% rate on a small set of goods, and special rates of 0.25% and 3%.
Worked example
Examples
GST added to ₹1,00,000 at 18%
GST is ₹18,000 and the total is ₹1,18,000. Within a state, that is ₹9,000 CGST and ₹9,000 SGST.
₹1,18,000 including 18% GST
The amount without GST is ₹1,00,000 and the GST in it is ₹18,000.
Questions
Common questions
What are the GST rates in India?
Most goods and services are taxed at 5% or 18%. A small set of goods carries 40%. Gold and silver are at 3%, and rough diamonds at 0.25%. Some items are exempt. The rate that applies depends on the item, so check the rate for your product or service.
How do I remove GST from a price?
Divide the price by 1 plus the rate. At 18%, divide by 1.18. The difference is the GST.
When do I charge CGST and SGST, and when IGST?
Charge CGST and SGST together when the supplier and the place of supply are in the same state. Charge IGST when they are in different states.
Is this the same as the figure on my invoice?
It is an estimate. Rounding rules, the rate for your item and special cases such as reverse charge can change the invoice figure.
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