Invoice Number Generator

What is the Invoice Number Generator?

Generate unique, sequential invoice numbers for your business. Create professional invoice numbering systems with custom prefixes and formats. This free online tool requires no registration and works instantly in your browser.

Generate Invoice Number

Prefix

Company or invoice identifier (e.g., INV, INVOICE)

Year (Optional)

Leave empty to exclude year from invoice number

Starting Number

Your first invoice number

Padding (Number of Digits)

Best Practices for Invoice Numbering

• Use sequential numbering (never skip or reuse numbers)
• Include year for better organization across years
• Use consistent format for all invoices
• Keep a record of your last invoice number
• Consider adding client codes for large client bases

Related Resources

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Generate Invoice Number

Best Practices for Invoice Numbering

Related Resources

Invoice Templates

Other Tools

Invoicing Guides

Ready to create your invoice?

Generate Invoice Number

Best Practices for Invoice Numbering

Related Resources

Invoice Templates

Other Tools

Invoicing Guides

Ready to create your invoice?