How is GST calculated?

GST is calculated as (Amount × GST Rate) ÷ 100. For intra-state transactions, the GST is split equally into CGST and SGST. For inter-state transactions, the full amount is charged as IGST.

What are the GST slabs in India?

The common GST rates in India are 0%, 5%, 12%, 18% and 28%. Most goods and services fall under 18%, while essentials are taxed at 5% and luxury items at 28%.

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GST Calculator

Calculate Goods and Services Tax on any amount. See the CGST, SGST and IGST breakdown and the total payable including GST.

GST Details

Amount (before GST)

GST Rate

Currency

Result

Base Amount₹10,000.00

CGST (half)₹900.00

SGST (half)₹900.00

IGST (inter-state)₹1,800.00

Total GST₹1,800.00

Total (incl. GST)₹11,800.00

How GST is calculated

Goods and Services Tax (GST) is calculated as a percentage of the base amount. The formula is GST = (Amount × Rate) ÷ 100. For intra-state (within the same state) supplies, the GST is split equally between CGST (Central GST) and SGST (State GST). For inter-state supplies, the entire tax is charged as IGST (Integrated GST).

For example, on a ₹10,000 invoice at 18% GST, the total GST is ₹1,800 — split into ₹900 CGST and ₹900 SGST for an intra-state sale, or charged as ₹1,800 IGST for an inter-state sale. The total payable is ₹11,800.

Common GST rates

0% — Essential unbranded goods and services
5% — Essential commodities, packaged food
12% — Processed food, certain goods
18% — Most goods and services (default rate)
28% — Luxury items, automobiles, tobacco

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