GST calculator
Add or remove GST at the current rates, split it between CGST and SGST or IGST, and check whether you need to register.
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How GST is worked out
For a price before GST, tax is the price times the rate. For a price that already includes GST, the value before tax is the price divided by one plus the rate. Within a state the tax is split equally into CGST and SGST; for a supply to another state or an import it is charged as IGST.
Worked example
| ₹11,800 including 18% GST, within the state | Amount |
|---|---|
| Value before GST | ₹10,000 |
| CGST 9% | ₹900 |
| SGST 9% | ₹900 |
| Total | ₹11,800 |
Common questions
What are the GST rates now?
Since 22 September 2025 most goods and services fall in two slabs, 5% and 18%, with 40% for a short list of luxury and sin goods. Gold and silver are at 3%, rough diamonds at 0.25%, and some items are nil-rated.
When do I charge CGST and SGST or IGST?
For a supply within your state, split the rate equally between CGST and SGST. For a supply to another state or an import, charge IGST at the full rate.
When must a business register for GST?
When aggregate turnover crosses ₹40 lakh for suppliers of goods only, or ₹20 lakh for services, with lower limits in some states, such as ₹10 lakh in Manipur, Mizoram, Nagaland and Tripura and ₹20 lakh for goods in Telangana. Inter-state suppliers of goods and most e-commerce sellers must register regardless.
For education only. Check the rate for your exact goods or services by HSN or SAC code. Not tax advice.