Invoicing Guides

Plain-English guides for freelancers, contractors, small businesses, and anyone billing someone for personal or side work — no accounting background required.

Free Invoice Template

What a proper invoice needs to include, a simple example you can copy, and where people usually go wrong.

How to Invoice a Client

A step-by-step walkthrough from agreeing scope to getting paid, including what to do when a client pays late.

Personal Invoicing, Explained

How to bill for freelance work, side gigs, or personal services — without registering a business first.

Want to skip the manual work?

SaBooks generates proposals and PDF invoices, tracks who's paid, and emails clients directly — free to use, on the web or as an installable app.