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Add or remove GST at any slab rate — with CGST/SGST split shown automatically.
Exclusive (add GST): you have the pre-tax price. GST = amount × rate ÷ 100. A ₹5,000 product at 18% becomes ₹5,900.
Inclusive (remove GST): you have the MRP-style final bill and want the GST inside it. Base = amount ÷ (1 + rate/100). From a ₹5,900 inclusive bill at 18%, the base is ₹5,000 and GST is ₹900 — exactly what appears on a proper tax invoice.
| Slab | Typical goods & services |
|---|---|
| 0.25% | Rough & unpolished diamonds |
| 3% | Gold, silver, jewellery |
| 5% | Essentials, economy transport, some packaged food |
| 12% | Processed food, higher-end goods |
| 18% | Most services & standard goods |
| 28% | Luxury & sin goods, cars, aerated drinks |
Rates change from time to time by GST Council notification — always confirm the current rate for your item before invoicing.
On sales within a state, GST splits equally into CGST (centre) and SGST (state) — which is why the calculator shows both at half the slab rate.
On sales between states, the full amount is charged as IGST. The total tax is the same either way; only the split differs.
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