India GST Calculator
Add or remove Indian GST at 0%, 5%, 12%, 18%, 28% or 40% with CGST/SGST or IGST split.
India GST slabs last updated · reference source
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Currency: Amounts are calculated in the currency you select; this site does not convert between currencies and does not use live exchange rates.
Dated static reference; no live data is fetched. Verify current source values and assumptions before relying on results.
What this tool does
Calculates Indian goods and services tax at the static slab rates, splitting intra-state tax equally into CGST and SGST/UTGST or showing a single IGST amount for inter-state supplies.
How to use the India GST Calculator
- Enter the amount in your own currency.
- Choose whether the amount already includes GST or not.
- Select the applicable rate.
- Read the net amount, GST and gross total; copy or print the result.
Formula
GST = net × slab/100; CGST = SGST = GST ÷ 2 (intra-state); IGST = GST (inter-state); net = gross ÷ (1 + slab/100)
- slab
- GST rate for the item's HSN/SAC code
Worked example
An ₹11,800 invoice inclusive of 18% GST within one state.
Inputs
- Amount$11800
- Amount entered isGross — tax already included (remove tax)
- GST slab18%
- Supply typeWithin the same state (CGST + SGST)
Result
- Net amount (excl. GST)$10,000.00
- GST$1,800.00
- Gross amount entered$11,800.00
India GST slabs
| Slab | CGST | SGST/UTGST | IGST |
|---|---|---|---|
| 0% | 0% | 0% | 0% |
| 5% | 2.5% | 2.5% | 5% |
| 12% | 6% | 6% | 12% |
| 18% | 9% | 9% | 18% |
| 28% | 14% | 14% | 28% |
| 40% | 20% | 20% | 40% |
Results explained
- Net amount
- Price before GST.
- GST
- GST payable at the selected static rate.
- Gross amount
- Price including GST.
Frequently asked questions
Divide by 1 plus the slab rate. ₹11,800 ÷ 1.18 = ₹10,000 net and ₹1,800 GST at 18%.
Within one state, GST is split equally between the Centre (CGST) and the state (SGST/UTGST). For supplies between states, a single IGST is charged.
From 22 September 2025 most goods and services moved to the 5% and 18% slabs, with 40% for specified luxury and sin goods; 12% and 28% remain listed for items and transitions still taxed at those rates. Confirm the HSN/SAC rate for your item.
Look up the HSN code for goods or SAC code for services in the CBIC rate schedules.
No. Slabs are stored in a dated static table and the calculation runs in your browser.