Change invoice numbering

Reset draft or formal numbering and keep numbers unique.

Use invoice numbering settings when you need a new numbering sequence.

This is common at the start of a new year or after a migration.

Change numbering carefully.

Duplicate numbers can break invoice creation and affect financial reporting.

Before you start

Invoices use two number sequences:

• draft numbers before the invoice is sent
• formal invoice numbers after the invoice is sent

Take a screenshot of the current settings before you change them.

Change the numbering

1

Open Numbering settings

Go to Settings → Settings → Numbering.

2

Find Invoice numbering

Scroll to the invoice numbering section.

3

Reset the field you want to change

You can reset:

• Next draft number
• Next invoice number

After reset, the field becomes editable.

4

Set the new values

Enter the next number, prefix, and number length.

Use the example field to check the result.

5

Save and test

Save the settings.

Then create a test invoice and confirm the number is unique.

Important fields

• Prefix — often uses [YYYY] to change automatically each year
• Number length — controls leading zeros
• Next draft number — used before finalization
• Next invoice number — used after sending

Frequently asked questions

I changed the numbering and now I get a white screen. What happened?

The new number likely already exists.

Check whether the draft or invoice number overlaps with an existing invoice.

Can I use a custom prefix?

Yes.

Make sure it stays unique.

Why are there separate draft and invoice numbers?

Draft numbers are temporary.

Formal invoice numbers are used after sending.

Related topics

• Create an invoice
• Create an invoice scheme