GST calculator for any amount

How GST is calculated

GST is charged on the taxable value of a sale: the price after any discount, before tax. The calculator works in either direction, rounding each amount to the nearest paisa.

Adding GST to a price

When your price does not include tax, GST is the taxable value multiplied by the rate.

• GST = taxable value × rate ÷ 100
• Total = taxable value + GST

Example: ₹1,000.00 at 18% gives GST of ₹180.00 (₹90.00 CGST + ₹90.00 SGST) and a total of ₹1,180.00.

Removing GST from an MRP or inclusive price

When the price already includes tax, divide it by (1 + rate ÷ 100) to find the taxable value; the rest is GST.

• Taxable value = inclusive price × 100 ÷ (100 + rate)
• GST = inclusive price − taxable value

Example: an inclusive price of ₹1,180.00 at 18% has a taxable value of ₹1,000.00 and GST of ₹180.00.

CGST and SGST, or IGST?

It depends on the place of supply. When the buyer is in the same state as you, the tax is split equally into central tax (CGST) and state tax (SGST, or UTGST in a union territory). When the buyer is in another state, the whole amount is charged as integrated tax (IGST).

Example: a sale of ₹2,500.00 at 5% to a buyer in another state carries IGST of ₹125.00, for a total of ₹2,625.00.

Which rate applies?

The rate depends on the HSN code of the goods or the SAC code of the service, not on the kind of shop you run. This calculator lists 0%, 0.1%, 0.25%, 1%, 1.5%, 3%, 5%, 6%, 7.5%, 12%, 18%, 28%, 40%. Check the current rate for your item on the official GST rate finder or with your CA before you bill, as rates are revised from time to time.

From calculator to invoice

In Parchi you set the HSN code and GST rate on each item once. Every invoice then works out the taxable value and the CGST, SGST or IGST split from the place of supply, and can round the total to the nearest rupee. See what else a tax invoice must show in our GST invoice format guide.

This calculator is for general information. It is not tax advice.

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