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GST Calculator
Add or remove GST at any slab with CGST, SGST and IGST split for intra- and inter-state supply.
TaxInputs
Results
Formula
- Adding GST: Tax = Amount × rate / 100 ; Total = Amount + Tax
- Removing GST: Base = Amount × 100 / (100 + rate) ; Tax = Amount − Base
- Intra-state: CGST = SGST = Tax / 2
- Inter-state: IGST = Tax
GST is a destination-based value-added tax. For supply within a state the levy splits equally between the Centre (CGST) and the State (SGST); across states a single IGST at the same total rate applies and is later apportioned. Removing GST from an inclusive price requires the reverse-charge form Base = Price × 100/(100 + rate) — dividing by the rate directly is a common and costly mistake.
Step-by-step Calculation
- 1.Taxable value
entered amount₹10,000.00 - 2.GST
10,000.00 × 18%₹1,800.00 - 3.Invoice total
base + GST₹11,800.00
Assumptions
- • Rate applies to the whole taxable value; no composite or mixed supply split.
- • Cess on demerit goods (28% slab) is not included.
- • Input tax credit is not netted off.
Money Tips
- ◆Invoices must show CGST and SGST as separate lines for intra-state supply.
- ◆Check the HSN/SAC code before assuming a slab — many goods sit at 5% or 12%.
Warnings
- ▲Compensation cess applies over and above 28% on tobacco, aerated drinks and some vehicles.
- ▲Wrong place-of-supply classification (IGST vs CGST+SGST) triggers interest and re-payment.
References & Standards
CGST Act 2017IGST Act 2017GST Council rate schedules
Results are planning estimates generated in your browser. Nothing you enter is uploaded or stored. Verify material decisions with your lender, adviser or chartered accountant.