GST Calculator
Add or remove GST at the current rates, and split the tax into CGST and SGST or IGST depending on the type of supply.
Researched by Mirza Seraj BaigFacts last checked against official sources on 7 September 2026The invoice value you are working from.
Two main slabs apply since 22 September 2025. The old 12% and 28% rates no longer exist.
Interstate supply attracts IGST; supply within a state splits equally into CGST and SGST.
Total invoice value
₹11,800
≈ 11.80 thousand
- Taxable value
- 85%
- GST
- 15%
- Taxable value
- ₹10,000
- CGST @ 9%
- ₹900
- SGST @ 9%
- ₹900
- Total GST
- ₹1,800
What is GST?
Goods and Services Tax is charged on most supplies of goods and services in India. Since 22 September 2025 there are two main rates, 5% and 18%, plus a 40% special rate on items such as pan masala, tobacco, aerated drinks and high-end vehicles.
For a supply within one state the tax is split equally into Central GST and State GST. For a supply between states the whole amount is charged as Integrated GST. The total is the same either way.
How is GST calculated?
To add GST: tax = amount × rate, and total = amount + tax. To remove GST from a tax-inclusive amount: taxable value = amount ÷ (1 + rate), and tax = amount − taxable value. For supply within a state the tax splits equally into CGST and SGST; for supply between states the whole amount is IGST.
GST calculation example: 18% on ₹10,000
Adding GST: ₹10,000 × 18% = ₹1,800, so the customer pays ₹11,800. Within a state that is ₹900 CGST plus ₹900 SGST; between states, ₹1,800 IGST.
Removing GST from a price that already includes it: ₹11,800 ÷ 1.18 = ₹10,000 taxable value, and the difference, ₹1,800, is the GST.
GST on common amounts
GST payable on an amount before tax, at each of the current rates.
| Amount before GST | GST at 5% | GST at 18% | GST at 40% |
|---|---|---|---|
| ₹1,000 | ₹50 | ₹180 | ₹400 |
| ₹5,000 | ₹250 | ₹900 | ₹2,000 |
| ₹10,000 | ₹500 | ₹1,800 | ₹4,000 |
| ₹50,000 | ₹2,500 | ₹9,000 | ₹20,000 |
| ₹1,00,000 | ₹5,000 | ₹18,000 | ₹40,000 |
Frequently asked questions
What are the current GST rates in India?
Following the 56th GST Council meeting, the structure was simplified to two main rates — 5% (merit rate) and 18% (standard rate) — plus a 40% special rate on sin and luxury goods such as pan masala, tobacco, aerated drinks and high-end vehicles. The revised rates took effect on 22 September 2025.
Do the 12% and 28% GST slabs still exist?
No. The 12% and 28% slabs were removed when the two-rate structure came into effect on 22 September 2025. Items previously in those slabs were moved to 5%, 18% or the 40% special rate.
What is the difference between CGST, SGST and IGST?
For a supply within the same state, GST is split equally between Central GST and State GST. For a supply between states, the whole amount is charged as Integrated GST instead. The total tax is the same either way.
How do I remove GST from a total amount?
Divide the total by (1 + rate). For example, at 18% divide by 1.18 to get the taxable value; the difference is the GST. Select the GST-inclusive option in the calculator to do this automatically.
How much is 18% GST on ₹1,000?
₹180, making the total ₹1,180. Within a state it splits into ₹90 CGST and ₹90 SGST.
What is 5% GST on ₹10,000?
₹500, for a total of ₹10,500.