Keep your own invoice numbers when you switch

Updated 10 October 2026 · 3 min read

Set your own number format for invoices, orders and quotations, and carry on from your last number — without duplicates.

Your customers know your invoice numbers. When you move to TechnoCount, keep them. Every document type can have its own format and continue from where your old system stopped.

Where

Settings › Document numbering. Each line is one document type — Quotation, Sales Order, Delivery Order, Invoice, Credit Note, Purchase Order and the rest — showing its Format, when the count Resets, and the Next number the next document dated today will get. An owner or admin can change the format and fill in Start next at to carry on from your old system's last number.

Writing a format

Use fixed text plus these pieces: {YYYY} or {YY} for the year, {MM} for the month, and one running number written as hash signs — {####} is a four-digit, zero-padded number.

The year and month are the document's date. A format with the month restarts monthly, one with only the year restarts yearly, and one with neither never restarts. Unless you change it, invoices are numbered INV-{YY}-{######} (INV-26-000001), and the other document types follow the same pattern with their own prefix.

The rules

• Letters, digits and - / . _ only, up to 40 characters.
• Exactly one running number, of 1 to 10 hash signs; the month needs the year beside it.
• A format must contain a letter and start with a letter or a piece such as {YY} — so a spreadsheet reads it as text, not as a number or a date.
• Each document type has its own format, for the whole company. A change applies to new documents only; existing documents keep their numbers.