GST calculator with CGST, SGST and IGST split
Compute GST at any slab, split it into CGST/SGST or IGST by place of supply, and work backwards from an inclusive price.
Updated 21 August 2026
Doing this every week? The same screen in the Fatoza app keeps the supplier's ledger, allocates payments against each bill, and carries the numbers into the return instead of into a download.
Open it in the appEnter an amount and a slab; get the tax, the split and the total. Choose intra-state for a CGST/SGST split or inter-state for IGST — the tool does not guess, because guessing that is the single most common GSTR-1 error.
Works backwards too: give it an inclusive price and it returns the taxable value and the tax.
Free, no account, works offline once loaded.
Frequently asked questions
When is it IGST rather than CGST plus SGST?
Inter-state supplies are IGST; intra-state supplies split into CGST and SGST. The determination is the place of supply, not where your office is.
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