GST Calculator

GST in India is added to a taxable value at a slab the GST Council notifies — commonly 5%, 12%, 18% or 28% for many goods, with other rates for specific items. If a Jaipur wholesaler quotes ₹1,000 exclusive of GST at 18%, the buyer owes ₹1,180. This page does that multiply-and-add, not a return on gst.gov.in.

The cash-flow question

Freelancers in Surat and shopkeepers in Coimbatore still lose arguments with clients because “₹1,000 plus GST” was never written down. IndiaKit’s GST calculator makes the tax line visible: base, GST amount, and total. Composition dealers, exempt supplies and reverse charge are out of scope on purpose.

The maths on this page

GST amount = base × rate ÷ 100. Total = base + GST. Defaults of ₹1,000 at 18% yield ₹180 tax and ₹1,180 payable. The same arithmetic works for 5%, 12% or 28% from the dropdown.

For intra-state supplies the law usually splits GST into CGST and SGST of half each; for inter-state it is IGST at the same headline rate. This tool shows one GST amount, which you can mentally split 9%+9% on an 18% intra-state invoice.

HSN and SAC codes decide the legal rate, not this dropdown. Confirm the tariff on cbic.gov.in or gst.gov.in. IndiaKit will not ask for GSTIN in this calculator; the GSTIN page only checks format.

An 18% invoice on a ₹1,000 design fee in Jaipur

A graphic designer in Jaipur bills ₹1,000 before tax at 18% GST. The calculator shows ₹180 GST and ₹1,180 total. On a Rajasthan-to-Rajasthan invoice she prints CGST ₹90 and SGST ₹90. If the client were in Bengaluru she would print IGST ₹180 instead, same total.

What a bank still has to confirm

Rates, exemptions and compensation cess change by notification. This is not GSTR-1. Input tax credit eligibility depends on invoices, blocking rules and your GST registration type. File only on gst.gov.in.

Common questions

Should I split 18% into CGST and SGST here?

The page shows a single GST amount. For an intra-state invoice, half is typically CGST and half SGST. For inter-state, the same amount is IGST. Your tax professional should map the place of supply.

Is 18% the default GST for all services?

No. Many services are 18%, some are 5% or 12%, some are exempt. The dropdown is a convenience, not a classification opinion. Use the GST rate finder on official portals.

Does this handle GST-inclusive prices?

This version starts from amount before GST. To back-calculate a tax-inclusive ₹1,180 at 18%, the base is 1180/1.18. Mentally invert if your quotation is inclusive.