Keystone · Tax & Compliance
GST Calculator
Add or extract GST from any amount and see the CGST/SGST or IGST split.
In short: For GST-exclusive prices, GST = taxable value × rate. For GST-inclusive prices, taxable value = gross ÷ (1 + rate). Intra-state supplies split into CGST and SGST/UTGST; inter-state supplies attract IGST — subject to place-of-supply rules.
Transaction
Simplification — actual CGST/SGST vs IGST treatment follows place-of-supply rules, not only seller/buyer locations.
Taxable value
₹1,00,000.00
GST
₹18,000.00
Gross amount
₹1,18,000.00
- CGST
- ₹9,000.00
- SGST / UTGST
- ₹9,000.00
CGST/SGST vs IGST depends on place of supply and related rules, not just seller and buyer locations. Classification, exemptions and specific notifications require review.
Worked example
₹1,00,000 at 18% exclusive → GST ₹18,000, gross ₹1,18,000 (CGST ₹9,000 + SGST ₹9,000 intra-state). ₹1,18,000 inclusive → taxable ₹1,00,000, IGST ₹18,000 inter-state.
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Get GST advisory from Keystone
Estimates are indicative. A Keystone advisor can review your specific position.
Which rate applies to my supply?
Rates depend on HSN/SAC classification, exemptions and notifications — confirm with a tax professional.
When is it IGST vs CGST+SGST?
Generally intra-state supplies split CGST/SGST and inter-state supplies attract IGST, but place-of-supply rules determine the head — the selector is a simplification.
Sources and references
This tool provides indicative estimates for education and planning only. It is not investment advice, a fairness opinion, a tax computation, a financing offer or a regulatory determination. Consult a qualified advisor before acting on any result.
Service: Taxation