A minimal system
One numbering sequence, one folder of PDFs, one spreadsheet of issued bills. Create documents with the freelance generator or full how-to.
Mirror habits from freelancer invoicing: bill promptly, itemize clearly, state payment terms.
What every self-employed invoice should show
Your name or trading name, client details, unique number, dates, description of work, total due, and how to pay — checklist: what to include.
Keep net, tax (if any), and gross easy to read so the client’s AP team can post the bill without guessing.
Tax lines and country detail
Only charge VAT/GST when you should. Use country hubs for labels, and UK readers can see sole trader invoice UK.
A readable PDF is not always the same as a government e-invoice. Use official channels when your country requires them.
Sending and chasing
Export a clean PDF, then send a short invoice email with the number and due date in the subject.
If payment slips, re-attach the same file — do not invent a new number for a reminder.
Disclaimer
Self-employment and tax rules are local. This page is operational guidance for client PDFs, not accounting or legal advice.