GST Calculator

The Goods and Services Tax replaced a tangle of central and state indirect taxes — VAT, service tax, excise, octroi — with a single destination-based tax in July 2017. Every taxable supply in India today is charged GST at one of four standard slabs: 5%, 12%, 18%, or 28%, with a few special rates for gold (3%) and unbranded essentials (0%). Most services and standard consumer goods sit at 18%, which is why it's the default in this calculator.

For an intra-state sale, GST is split equally into Central GST and State GST: an 18% invoice carries 9% CGST and 9% SGST, both shown here. For inter-state transactions you instead pay a single IGST equal to the full rate, which the central government later shares with the destination state. If your buyer is GST-registered, they can claim Input Tax Credit on the GST you charged, so it's effectively recoverable for B2B trade.

Use “Add GST” when you have a base price and want to quote the final invoice. Use “Remove GST” when a price on a tag or receipt is already inclusive and you need the pre-tax value — handy for accounting, expense claims, and verifying that a vendor calculated GST correctly. The reverse formula is Base = Total × 100 / (100 + rate); that's what this calculator runs under the hood. Composition-scheme dealers and unregistered small suppliers (turnover below ₹40 lakh for goods, ₹20 lakh for services in most states) don't charge GST, so their invoices won't match the numbers here.