A good invoice answers four questions without a phone call: who is asking to be paid, who is being asked, for what, and how much by when. Use this checklist and nothing important is missing.
1The checklist
Your name or business name, address, phone and email. The client’s name and address. An invoice number and the issue date. The due date or payment terms. A description, quantity and price for each line. The subtotal, any discount, tax and the total due. How to pay. A short note, such as a thank you or a late-fee line you agreed in advance.
2An example you can copy
Invoice INV-0012, issued Nov 05 2026, due Nov 20 2026. Bill to: Northwind Coffee Co. Two lines: Logo design, 1 at $900.00, and Revisions, 3 hours at $75.00 each, $225.00. Subtotal $1,125.00. Total due $1,125.00. Pay by Zelle to the email on the invoice, and use INV-0012 as the reference.
3What you can leave out
Anything the client does not need to pay you: long terms and conditions, your life story, or three different ways to pay that you check once a year. Keep the page calm. A clear invoice gets paid sooner than a crowded one.
4Rules that depend on where you are
Some places require a tax registration number, a specific wording, or a particular format for certain sales. This guide cannot tell you which apply to you. Ask your accountant or your tax office, and check again if you start selling somewhere new.
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Questions people ask
Does an invoice need my signature?
Usually not. Check the rules where you work if your client or your tax office asks for one.
How long should I keep invoices?
Rules vary by country and by kind of record. Ask your accountant, and keep a copy you can find.