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Invoice Number Generator

Create consistent invoice, receipt or quotation numbers with prefix, financial year and padding — e.g. INV/2026-27/0001.

About Invoice Number Generator

This invoice number generator helps you create a clear, consistent numbering series for invoices, receipts, quotations and credit notes. Pick a document type or type your own prefix, choose the financial-year style and separator, and set the starting number and padding to get numbers like INV/2026-27/0001.

Generate as many numbers as you need, then copy or download the list for your billing sheet or accounting software. It suits shop owners, freelancers and small businesses that raise GST invoices by hand or in a spreadsheet. It runs in your browser and is free with no sign-up.

How to use Invoice Number Generator

  1. Pick a document type or type your own prefix.
  2. Choose the financial-year style and separator.
  3. Set the starting number, padding and how many you need.
  4. Copy or download the list.

Frequently asked questions

What are the GST rules for invoice numbers?

Under Rule 46(b) of the CGST Rules, each invoice needs a consecutive serial number, unique for the financial year, of up to 16 characters, using letters, digits, hyphen (-) and slash (/) only. You may run separate series (e.g. for branches).

Should numbering restart every April?

It is common and recommended to start a new series each financial year (1 April – 31 March), which is why the year is part of the format.

Can I skip numbers?

Avoid gaps. If an invoice is cancelled, keep the number and mark it cancelled rather than reusing it.

How do I create an invoice number?

Choose a prefix such as INV, add the financial year and a padded serial number, for example INV/2026-27/0001, and keep the series in order.

How do I write an invoice number on a bill?

Place it near the top with the invoice date, using the same format for every bill so each number is unique and easy to trace.

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