Invoicing5 min
Creating a Quote as a Freelancer: Free and Without the Hassle
Creating a quote as a freelancer: what should it include, which quoting software can you use for free, and how do you turn a quote into an invoice with 1 click?
Invoicing
Invoicing6 min
Invoice Not Paid? How to Send a Payment Reminder and Formal Demand Letter (Aanmaning)
Client hasn't paid? Follow the correct order under Dutch law: friendly reminder, formal demand letter (aanmaning), statutory interest, then debt collection or court.
Invoicing7 min
How to Create an Invoice: The Complete Guide for Freelancers
Learn how to create an invoice the right way: mandatory details, templates in Word, Excel and PDF, free online tools, and automatic invoicing with slimzaak.
Invoicing5 min
Invoicing Your First Client: A Beginner's Guide for New Freelancers
Sending your first invoice as a freelancer? Learn what new freelancers forget, how to set payment terms, and why a professional template builds trust.