GST Calculator

India's Goods and Services Tax (GST) is an indirect tax that came into effect on 1 July 2017, replacing a tangle of earlier levies — central excise duty, service tax, state VAT, octroi and more — under the principle of "One Nation, One Tax". It is charged at each stage of the supply chain, with businesses claiming input-tax credit so that tax is effectively paid only on the value they add.

From 22 September 2025, GST 2.0 (announced at the 56th GST Council meeting) simplified the structure to four slabs: 0%, 5%, 18% and 40%. The earlier 12% and 28% slabs were removed. At a glance: 0% covers nil-rated essentials such as dairy, lifesaving medicines and individual health and life insurance; 5% covers daily-use items, packaged foods and most medicines; 18% is the standard rate for the bulk of goods and services including electronics, appliances and vehicles; and 40% applies to luxury and sin goods like tobacco, pan masala, aerated drinks and online gaming.

Every GST charge splits into components by where the supply happens. An intra-state sale is shared equally as CGST (central) and SGST (state). An inter-state sale or import is charged a single IGST (central, later apportioned with the destination state). A supply within a union territory is split as CGST and UTGST. This calculator works both ways: choose exclusive to add GST onto a base price, or inclusive to reverse-calculate the original price from a GST-included total. Note that a few sin and luxury goods still attract a separate compensation cess, which is not included here.

At the calculator's defaults — a ₹1,000 amount, the standard 18% rate, exclusive mode, and an intra-state supply — GST works out to ₹180 (18% of ₹1,000), giving a total price of ₹1,180. Because the supply is intra-state, that ₹180 splits equally into ₹90 CGST and ₹90 SGST rather than a single combined line. Switching the same inputs to inclusive mode would instead treat ₹1,000 as already including GST: the calculator divides by 1.18 to recover a base price of about ₹847.46, with the remaining ₹152.54 being the GST that was already built into that figure — useful when a vendor quotes you a single all-in price and you need to know how much of it is tax versus the actual cost of the goods or service.