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Create Invoice Numbers for Upcoming WooCommerce Orders

Last updated on February 4, 2025

The invoice number is one of the most important components of an invoice. Every invoice should possess a unique invoice number. The WebToffee’s WooCommerce PDF Invoices, Packing Slips, and Credit Notes plugin helps to create unique invoice numbers for upcoming orders either using a custom number series or by using the order number as the invoice number. The plugin also allows resetting invoice numbers for upcoming orders.

Creating invoice numbers for upcoming orders

Custom invoice number series

  1. Navigate to Invoice/Packing > Invoice > General from your WordPress dashboard.
  2. Head on to the Invoice number section and find the Invoice number format option.
  3. Choose Custom number to create a custom invoice number series.
Custom numbers for invoices
Custom numbers for invoices
  1. As a next step, enter the desired starting number for invoices in the ‘Invoice starting number’ field.
Starting number for invoices
Starting number for invoices
  1. Add a prefix and suffix to your invoice number in the specified fields. You can leave the fields blank if you prefer not to add one. To add a date format as the suffix, click on the suffix field and choose a format from the dropdown menu.
Prefix and suffix for invoice number
Prefix and suffix for invoice number
  1. Indicate the total length of the invoice number, excluding the length of prefixes and suffixes in the ‘Invoice number length’ field. If the length of the generated invoice number is less than the provided, it will be padded with ‘0’.
Field to specify the length of invoice numbers
Field to specify the length of invoice numbers
  1. Finally, click on Update Settings to save the changes.

Order number as invoice number

  1. Navigate to Invoice/Packing > Invoice > General from your WordPress dashboard.
  2. Head on to the Invoice number section.
  3. In the Invoice number format option, choose Order number to use the order number as the invoice number.
Order number as invoice number
Order number as invoice number
  1. Add a prefix and suffix to your invoice number in the specified fields. You can leave the fields blank if you prefer not to add one.
Field to specify a prefix and suffix for the invoice number
Image highlighting prefix and suffix fields
  1. Enter the total length of invoice numbers, excluding the length of prefixes and suffixes in the ‘Invoice number length’ field. If the length of the generated invoice number is less than the provided, it will be padded with ‘0’.
Field to enter the length of invoice numbers
Field to enter the length of invoice numbers
  1. Finally, click on Update Settings to save the changes.

To learn more about resetting invoice numbers, check out the following article: Reset Existing Invoice Numbers.