How do you invoice a fixed-price project as a freelancer?
Create a detailed quote, send it for electronic signature, then convert it into a deposit invoice (often 30%) once accepted. On delivery, the balance invoice is generated automatically, deducting the deposit already collected. Every document is numbered through an unalterable ISCA chain and embeds the Factur-X format required by the 2026 reform. You keep control over your payment terms (due date, late penalties) while staying compliant with French commercial law. Your client receives a secure link and pays by card in 30 seconds, and you are notified of the payment in real time.