Compute IGST for inter-state transactions. IGST is the full GST rate applied as a single tax — no CGST/SGST split — and this shows exactly how it compares.
IGST — Integrated GST — applies when goods or services move between states. Instead of splitting into CGST and SGST, the entire rate is charged as one IGST line, collected by the Centre and later apportioned to the destination state.
For a distributor billing across a state border, the total tax is identical to an intra-state sale — only the structure on the invoice changes. Getting this right matters because your buyer's input tax credit is claimed against the IGST line, not a CGST/SGST pair.
A Maharashtra distributor sells ₹10,000 of goods at 18% to a Gujarat retailer: IGST ₹1,800, invoice total ₹11,800. The same sale inside Maharashtra would read CGST ₹900 + SGST ₹900 — same ₹1,800, different lines.
IGST applies when the supplier's state and the place of supply differ — i.e. an inter-state sale, a sale to an SEZ, or an export. Same-state supplies use CGST + SGST.
No. IGST equals the full slab rate; CGST + SGST together also equal the full rate. The tax outflow is the same — only the government heads it goes to differ.
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