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Invoice number generator

Build a clean, sequential invoice-numbering scheme in seconds. Pick a prefix, a starting number, and padding, and get your next invoice numbers ready to copy.

Try it

Build your invoice number

Set the format below and copy your next number. The preview updates as you type.

Your next invoice number
INV-0001
  • INV-0001
  • INV-0002
  • INV-0003
  • INV-0004
  • INV-0005
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How it works

Three steps to a numbering scheme

1

Choose a prefix and format

Add a short prefix like “INV”, optionally include the year, and pick a separator.

2

Set the starting number and padding

Enter the number of your next invoice and how many digits to pad it to, e.g. 0001.

3

Copy your next numbers

Copy the next invoice number and see the sequence that follows, then keep counting up.

Invoice numbering, explained

What makes a good invoice number

A tidy numbering scheme keeps your books clean and your invoices looking professional. A few simple rules:

Keep it sequential

Number invoices in order: 0001, 0002, 0003. A clean sequence makes every invoice easy to find and reference, and looks established to clients even on invoice one.

No gaps, no duplicates

Each invoice needs its own unique number, with none skipped. Consistent, gap-free numbering is exactly what accountants and tax records expect at year-end.

Add a prefix or year for order

A prefix like “INV” or a year token (INV-2026-0001) groups invoices at a glance without any extra bookkeeping. Pick a format once and stay with it.

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FAQ

Questions, answered

Anywhere you like. Many solo businesses start at 0001, or a higher number like 1000 if they’d rather not signal it’s their first invoice. What matters is that every number after it is sequential and unique.
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Do it all in one place

Track your work, number and date your invoices automatically, and get paid without the big-suite bloat. $14.99/mo after your first 3 invoices, cancel anytime.

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