GST Calculator
Add GST to a price or work out how much GST is inside an inclusive price. See the CGST and SGST split for sales within a state, or IGST for sales to another state.
Fill in your details and press Calculate to see the breakdown here.
How GST is worked out
When a price does not include GST, multiply it by the rate to get the tax and add that to the price. When a price already includes GST, the tax is the price × rate ÷ (100 + rate).
- Add GST: ₹10,000 at 18% → GST ₹1,800 → invoice ₹11,800.
- Remove GST: ₹11,800 including 18% → GST = 11,800 × 18 ÷ 118 = ₹1,800 → taxable value ₹10,000.
For a sale within your state, the tax is split equally into CGST and SGST (UTGST in union territories without a legislature). For a sale to another state, an import or an export, the whole amount is IGST.
GST rate slabs
| Rate | Typical items |
|---|---|
| 0% | Fresh produce, milk, education and health services |
| 0.25% | Rough precious and semi-precious stones |
| 3% | Gold, silver and jewellery |
| 5% | Everyday essentials, packaged food, many services |
| 18% | Most goods and services, including professional services |
| 40% | Luxury cars, tobacco products, aerated drinks and other demerit goods |
The 12% and 28% slabs were merged into 5% and 18% from 22 September 2025. Check the rate for your HSN or SAC code before invoicing.
These calculators give indicative figures to help you plan. Government fees, tax rates and stamp duty change from time to time and depend on your exact facts. Confirm the final amount on the official portal or with our team before you file or pay.
Want an expert to check the numbers?
Book a free consultation and our team will confirm the exact fees and handle the filing for you.
