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GST calculator
Add GST to a price, or take it out of a price that already includes GST, and see the CGST, SGST or IGST split.
How it's calculated
- Add GST: GST = amount × rate ÷ 100; total = amount + GST.
- Remove GST: price before GST = amount ÷ (1 + rate ÷ 100); GST = amount − price before GST.
- Within a state, the GST is split equally into CGST and SGST. Between states it is all IGST.
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Questions
What are the GST rates now?
Since 22 September 2025 most goods and services fall under 5% or 18%, with 40% for a small list of luxury and sin goods. IT, software and consulting services are usually 18%. Check the rate for your HSN or SAC code.
How do I remove GST from a price?
Divide the GST-inclusive price by 1 plus the rate. For 18%, divide by 1.18: ₹1,180 includes ₹1,000 plus ₹180 GST.
Let the invoice do the maths
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