Invoice Number Generator
Create a consecutive GST-compliant invoice number series with prefix and financial year (e.g. INV/26-27/0001). Download as CSV.
- Free, no limits
- Runs in your browser
- No sign-up
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How to use the Invoice Number Generator
- Set a prefix, financial-year style and separator.
- Choose the start number, digits and how many to create.
- Copy or download the series.
Frequently asked questions
What are the GST rules for invoice numbers?
Rule 46: up to 16 characters, only letters, numbers, hyphen and slash, consecutive and unique for each financial year.
Should the series restart each year?
Most businesses restart on 1 April with the new FY in the prefix, which keeps numbers unique.
Can I use different series?
Yes, e.g. separate prefixes for each branch or for exports, as long as each series is consecutive.
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