Invoice numbering
An invoice only gets a number when you make it final. A draft invoice has no number yet. That way, discarding a draft never leaves a gap in your numbering.
How the number is built
The number consists of two parts, both set in Configuration > Modules > Invoice settings:
| Setting | What it does |
|---|---|
| Invoice number format | The pattern of the number. {KEY} is replaced by a counter, {KEY4} pads it to 4 digits. With {YEAR2}, {YEAR4} and {MONTH} you put the year or month in the number. |
| Invoice start number | The number of the very first final invoice. |
The first final invoice gets the start number, every next invoice the previous number plus one. Example: with format {YEAR2}{KEY4} and start number 100, your first invoice in 2026 gets number 260100, the next one 260101.
Note: the start number only counts as long as no invoice has been made final. Changing it afterwards has no effect. The counter simply continues.
The Invoice numbering card
At the top of the invoice settings you find the Invoice numbering card. It shows at a glance:
- the number format;
- the start number;
- the last issued number, or "No final invoice yet";
- the number the next final invoice gets.
Always check the next number here before you start invoicing, for example when you switch from another package and your numbering must continue.
Resetting the numbering
If you made test invoices final while setting things up, you want to start again from the start number before going live. You do that with the Reset numbering button on the card.
- First set the desired start number and click Save.
- Click Reset numbering on the card and confirm.
- Check on the card that the next number is now your start number.
Invoices that are already final keep their number. Only the next invoice starts again from the start number.
Resetting is only possible while your environment has the status Implementation. In production every invoice number must be unique. A reset would issue numbers twice, so the button is not on the card then. In that case the card shows the current environment status. Are you live and does the numbering still need to change? Contact support.
