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Calculate CGST, SGST, IGST and total tax on goods and services.
TaxNext's GST calculator works out the tax amount and total price for goods and services under India's Goods and Services Tax, either adding GST on top of a base price or backing it out of a GST-inclusive total. It splits the result into CGST + SGST for intra-state supply, or IGST for inter-state supply — useful for freelancers invoicing clients, small businesses pricing products, and anyone checking whether an invoice charged the right amount of tax.
The rate that applies to a specific item or service is set by its HSN/SAC classification — check the GST rate finder to look one up.
GST is added on top of the ₹10,000 price. Since the supply is intra-state, the 18% splits evenly into 9% CGST and 9% SGST rather than IGST.
When a price already includes GST, the base price is backed out as amount × 100 ÷ (100 + rate) — not amount − 18%, which would overstate the tax removed.
Inter-state supplies charge IGST instead of splitting into CGST + SGST — the total tax is the same 18%, just collected under a different head.
Standard-rate GST arithmetic for a single line item. It does not cover composition-scheme rates, exempt or nil-rated supplies, reverse charge, or input tax credit — those depend on registration status and transaction type, which this calculator does not capture.
Figures are illustrative estimates, not tax advice. For the current, item-specific rate notifications, see the CBIC GST portal.
Reviewed by VNAV & Associates, Chartered Accountants. Last updated: August 2026.
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