This guide is in English for now. The tool itself works in your language.
Proforma › Help › Numbering, printing and saved copies
How proforma invoice numbers work
Every proforma invoice gets the next number of its own series, for example PI/26-27/001. Each business has its own series, and it starts again at 1 on 1 April of every financial year.
Step by step
- Let the number fill in. When you start a new proforma invoice, Proforma invoice number already shows the next number. Keep it unless you have a reason.
- Change the series if needed. Press Change number series under the number box (or My data › Settings › Number series of each document). Set the prefix; the next number is shown at once.
- Type your own number (optional). You may type a different number, up to 16 letters, numbers, / or -. The maker warns when the same number is already saved for this business and year.
- Save. The series moves on only for numbers you saved.
Worked example
Your first proforma invoice of 2026-27 is PI/26-27/001, the next PI/26-27/002. On 1 April 2027 the series becomes PI/27-28/001 again with the new year, PI/27-28/001.
Rules and dates
A proforma invoice is not a tax invoice: it is an offer or a request for an advance, so it does not use up a GST invoice number. Keep its own PI series.
Common mistakes and how to fix them
- Starting each month from 1. Keep one running series for the year; start a new one only on 1 April.
- Two documents with the same number after making them on two computers. Work on one device at a time and move data with a backup file.
- A deleted number leaves a gap. Write the reason in your records (cancelled), or reuse it before the next one is issued.
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