Add GST
Add GST to a base price to get the total amount including tax
Exclude GST
Remove GST from a total price to find the base amount before tax
Add GST Calculator
Add GST to a base price to get the total amount including tax. Supports all Indian GST slabs.
Discount is applied on base amount before GST is calculated
Standard GST Rate
IT services, SaaS, laptops, TVs, refrigerators, coal, machinery, electronics, clothing above ₹2500
Result
Enter an amount to see the GST breakdown.
How to add GST to a price
Enter the price before tax, apply any discount, and get the GST split and total.
- 01
Enter the unit price, quantity and any discount
Single mode takes a price before tax, a quantity and an optional discount percentage. The discount comes off before GST is worked out, which is how a GST invoice should show it.
- 02
Pick the slab and the supply type
Choose 0%, 5%, 18% or 40%, then intra-state for a CGST and SGST split or inter-state for IGST.
- 03
Switch to multiple items for a mixed bill
Multi-item mode gives each line a description, quantity, rate and GST slab, and adds up the base, tax and total. Copy the summary to paste into an email or quote.
Worked example: a discounted line item
Say you're quoting 3 units at ₹2,499 each, with a 10% discount, at 18% GST to a buyer in your own state. The base is 3 × ₹2,499 = ₹7,497. The discount is ₹749.70, so the taxable value is ₹6,747.30. GST at 18% is ₹1,214.51, split into ₹607.26 CGST and ₹607.26 SGST, and the total is ₹7,961.81.
If you applied GST first and the discount afterwards, you'd charge tax on money the customer never pays. On this order that's ₹134.95 too much tax. Taxable value is the price after any discount shown on the invoice, so the order matters.
Mixed-rate bills
One invoice can carry items at different slabs, which is common for shops and caterers. Take 2 units of a ₹1,200 item at 5% and one ₹45,000 item at 18%. The first line adds ₹120 of GST for ₹2,520, the second adds ₹8,100 for ₹53,100. Adding a single rate across the whole bill would get the tax wrong, which is why multi-item mode lets each line keep its own slab.