GST Invoice Generator

What a valid GST invoice must contain

This is not a style question. If a required field is missing, your buyer's input tax credit can be challenged, and that turns your paperwork into their problem and then back into yours. The rules require the following.

1. Name, address and GSTIN of the supplier
2. A consecutive serial number, unique within the financial year, using only letters, numbers, hyphens and slashes, up to 16 characters
3. Date of issue
4. Name, address and GSTIN of the recipient if they are registered
5. For an unregistered recipient where the value exceeds ₹50,000, their name, address and the delivery address
6. HSN code for goods, or SAC for services
7. Description, quantity and unit
8. Total value, taxable value after any discount, and the rate and amount of tax split into CGST, SGST, IGST and cess as applicable
9. Place of supply, with the state name
10. Whether the tax is payable on reverse charge
11. Signature or digital signature of the supplier or an authorised representative

The form above covers all of these. Print it, sign it, and it is a compliant document.

The serial number rule catches people

The number has to be consecutive and unique within the financial year. Skipping numbers, restarting the sequence mid year, or issuing two invoices with the same number are all problems. A simple pattern such as INV-001 rising by one, restarting each April, is the safest approach. If you cancel an invoice, do not reuse its number.

Place of supply decides which tax applies

Within your own state you charge CGST and SGST, half the rate each. To another state you charge IGST at the full rate. The total tax is identical either way, but putting the wrong one on the invoice means your buyer cannot claim the credit cleanly.

For goods the place of supply is normally where they are delivered. For services it is usually the recipient's location if they are registered. There are specific rules for particular services, so check anything unusual rather than assuming.

HSN and SAC codes

HSN codes classify goods and SAC codes classify services. How many digits you must quote depends on your turnover, with larger businesses required to be more specific. Getting the code wrong can mean the wrong rate, which is your liability. Look yours up on the GST portal rather than guessing, and once you have it, reuse it consistently.

Saving as a PDF

Click print, then choose "Save as PDF" as the destination instead of a printer. Every current browser offers this. The page is styled so the form disappears and only the invoice prints, on clean white with no navigation or advertising.

Nothing is uploaded at any point. The invoice exists only in your browser until you print or save it, which also means closing the tab loses it. Save the PDF before you close.

Practical habits worth having

• Put payment terms on the invoice, not just a due date. "Net 15" or "payable within 15 days" is harder to ignore than a date in a corner.
• Add a UPI QR code for small business customers. Removing friction from paying you genuinely speeds up collection. The QR code generator makes one.
• Keep every invoice you issue, including cancelled ones, for the retention period the law requires.
• Invoice the day you finish, not at month end. Payment clocks only start when the invoice arrives.

One clear caveat. This tool produces a correctly formatted document. It does not file your returns, does not check whether the rate you entered is right for what you sold, and is not a substitute for an accountant. Rules change. Verify anything you are unsure of.

Common questions