How to make a GST invoice draft
- Enter a financial-year-unique invoice number, issue date, and the registered supplier’s name, address, GSTIN, and state.
- Enter the buyer’s details. If the delivery address differs from billing, add it separately. Select the legal place of supply independently of the buyer’s state.
- Add each item’s description, HSN/SAC, quantity, unit price, discount, verified GST rate, and any applicable cess.
- Review the tax split, reverse-charge treatment, totals, and signature area. Print or save as PDF only after the draft shows no missing-field warnings.
How the GST calculation works
For each line, taxable value = quantity × unit price − line discount. GST and cess are calculated on that value and rounded to the nearest paise. The tool sums line-level amounts; it never silently rounds the final payable total to whole rupees.
If the supplier state and place of supply differ, it shows IGST. If they match, it splits GST into CGST and SGST, or CGST and UTGST for a Union Territory without a legislature. For example, a ₹1,000 taxable line at a verified 18% rate gives ₹180 GST: either ₹180 IGST, or ₹90 CGST plus ₹90 SGST/UTGST. The form cannot decide the correct place of supply or rate for you.
Check before issuing
Rule 46 requires particulars that vary with the recipient and transaction. Invoice numbering must be consecutive and unique for the financial year; this browser tool cannot compare earlier invoices. For an unregistered buyer with a taxable supply of ₹50,000 or more, check that name, billing and delivery address, and state/UT code are shown. If the supply is exempt or you use a composition scheme, the applicable document may be a bill of supply. Exports, SEZ supplies, special sectors, and e-invoicing require separate particulars or processes.
Businesses covered by e-invoicing must obtain an IRN and signed QR code through an authorised Invoice Registration Portal. This tool cannot issue them. Read our GST invoice format guide, or use the e-invoice eligibility checker, HSN/SAC lookup, GST rate finder, and credit/debit note generator.