🇮🇳 GST Calculator
Work out GST on any amount, split into CGST and SGST for sales within a state or IGST for inter-state supplies.
Quick answer: GST = taxable value × rate. For example, 18% GST on ₹10,000 is ₹1,800 – split as ₹900 CGST and ₹900 SGST within a state, or ₹1,800 IGST between states – for a total of ₹11,800.
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GST Calculator inputs
Result
Total including GST
₹11,800.00
₹1,800.00 GST at 18%
| Taxable value | ₹10,000.00 |
| CGST (9%) | ₹900.00 |
| SGST / UTGST (9%) | ₹900.00 |
| Total GST | ₹1,800.00 |
| Invoice total | ₹11,800.00 |
GST on a taxable value of ₹10,000.00
| Rate | CGST | SGST | IGST | Total |
|---|---|---|---|---|
| 3% | ₹150.00 | ₹150.00 | ₹300.00 | ₹10,300.00 |
| 5% | ₹250.00 | ₹250.00 | ₹500.00 | ₹10,500.00 |
| 12% | ₹600.00 | ₹600.00 | ₹1,200.00 | ₹11,200.00 |
| 18% | ₹900.00 | ₹900.00 | ₹1,800.00 | ₹11,800.00 |
| 28% | ₹1,400.00 | ₹1,400.00 | ₹2,800.00 | ₹12,800.00 |
| 40% | ₹2,000.00 | ₹2,000.00 | ₹4,000.00 | ₹14,000.00 |
How GST is calculated
India’s Goods and Services Tax is levied on the taxable value of a supply. For an intra-state sale it is shared equally between the Centre (CGST) and the state (SGST, or UTGST in a union territory). For an inter-state sale or import the whole amount is Integrated GST (IGST), collected by the Centre.
GST = Taxable value × Rate ÷ 100 · CGST = SGST = GST ÷ 2 · Total = Taxable value + GST
Example: a ₹10,000 service at 18% within Maharashtra → CGST ₹900 + SGST ₹900 = ₹1,800 GST; invoice total ₹11,800. Billed to a customer in Karnataka, it would be ₹1,800 IGST instead.
Reverse GST (inclusive prices)
Taxable value = Inclusive price ÷ (1 + Rate ÷ 100)
₹11,800 ÷ 1.18 = ₹10,000. Never subtract 18% of the inclusive price – that would give ₹9,676, which is wrong.
GST rate slabs
| Rate | Typical items |
|---|---|
| 0% | Fresh produce, milk, education and healthcare services |
| 3% | Gold, silver and jewellery |
| 5% | Packaged food staples, many daily-use goods |
| 18% | Most goods and services, including professional services |
| 40% | Luxury and sin goods |
The 12% and 28% slabs were largely merged into 5% and 18% from 22 September 2025, but remain selectable for remaining items and earlier invoices.
Tips
- Check the HSN or SAC code of your product or service to confirm its rate.
- Registered buyers can usually claim input tax credit for GST paid on business purchases.
- Place of supply, not the seller’s location alone, decides between CGST/SGST and IGST.
Estimates for educational purposes, not financial or tax advice.
Frequently asked questions
How do I remove GST from an inclusive price?
Divide the inclusive amount by 1 plus the rate. ₹11,800 including 18% GST ÷ 1.18 = ₹10,000 taxable value, so the GST is ₹1,800. Choose "Remove GST" above to do this for you.
When is CGST + SGST charged instead of IGST?
If the supplier and the place of supply are in the same state or union territory, the tax is split equally into CGST and SGST (or UTGST). For supplies between states, and for imports, the full amount is charged as IGST.
What are the current GST slabs?
Since 22 September 2025 most goods and services fall into a 5% merit rate or an 18% standard rate, with 40% for luxury and sin goods. Special rates such as 3% on gold still apply, and 12% and 28% remain for a few items and older invoices.
Is GST charged on the discounted price?
Yes, a discount shown on the invoice at the time of supply reduces the taxable value, so GST is calculated on the price after that discount.