Invoicing Guides

Learn how to write an invoice step by step: what to include, how to number it, payment terms, and a free generator that does the formatting for you.

What to include on an invoice: the complete checklist of fields every invoice needs, from invoice numbers to payment terms to VAT requirements.

Invoice vs estimate (quote): what's the difference, when to use each one, and how to convert an approved estimate into an invoice in one click.

Invoice payment terms explained: Net 30, Net 15, due on receipt, deposits, and how to write payment terms that get you paid faster.

How to number invoices: sequential numbering systems, what to do about gaps and mistakes, and legal requirements for invoice numbers.

How to handle late invoice payments: late fee wording, reminder email timing, and a step-by-step follow-up system that gets invoices paid.

How to send an invoice: email best practices, PDF vs online invoicing, what to write in the message, and when to follow up.

How to get invoices paid faster: 8 proven habits — from invoicing immediately to deposits, clear terms, and payment options that remove friction.