Invoicing guides

Everything about invoicing that nobody teaches you — how to write one, what to put on it, how to number it, which payment terms to use, and how to actually get paid. Plain English, no fluff, free.

• How to write an invoiceThe 8 parts, step by step, with an example
• Invoice vs estimate vs quote vs receiptFour documents people mix up, sorted out
• Invoice payment terms explainedNet 30, Net 15, Due on Receipt & how to choose
• How to invoice as a freelancerYour first invoice, taxes, getting paid — no software
• How to get clients to pay on timeDeposits, clear terms, and a follow-up script
• How to number invoicesFormats, sequences, and what to avoid
• What to include on an invoiceThe complete checklist of required fields

Then put it into practice

Every guide points back to the same place: the free Billotter generator, which lays out the fields, does the math, numbers the invoice, and exports a clean PDF — entirely in your browser, with nothing uploaded. If your work fits a common trade, start from a pre-filled template instead of a blank page.