%GST Calculator Pro
Free · No sign-up · Works on mobile

Invoice GST Calculator

Add every line of your bill — quantities, prices and mixed GST rates — and get the invoice total with a rate-wise CGST/SGST or IGST breakup.

Build your invoice

ItemQtyPrice (₹)GST

Calculation slip

gstcalculatorpro.com · free tool

Note: Results are for quick estimation and general information only, based on rates as commonly applicable in 2026. Always confirm figures with the official GST/Income Tax portals or a qualified professional before filing. See our full disclaimer.

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Every tool on GST Calculator Pro is free, works offline once loaded, and never asks you to sign up.

Calculate GST for a multi-item invoice

Real invoices rarely have one line. This tool lets you add any number of items, each with its own quantity, unit price and GST slab, and totals everything with a per-rate GST breakup — exactly the way a tax invoice groups taxable values by rate.

What a valid GST tax invoice must show

  • Supplier and recipient name, address and GSTIN
  • Invoice number and date, place of supply
  • HSN/SAC of each item, quantity, taxable value
  • Rate and amount of CGST, SGST/UTGST or IGST shown separately
  • Signature or digital signature of the supplier

Use the intra/inter-state toggle to switch between a CGST + SGST split and a single IGST line — the totals stay the same, only the tax heads change.

Frequently asked questions

Can items on one invoice have different GST rates?

Yes. A single tax invoice can include items at 0%, 5%, 12%, 18% and 28%. The invoice must group taxable values and tax amounts rate-wise, which this calculator does automatically.

Should I use CGST+SGST or IGST on my invoice?

Use CGST + SGST when your buyer is in the same state as you (place of supply within the state). Use IGST for buyers in other states or union territories.

Does this tool create a printable invoice?

It calculates the amounts you need for your invoice. Copy the result slip and paste the figures into your billing software or invoice template.