Guide
How to Write an Invoice
A good invoice gets you paid without questions. A messy one gets ignored or queried. Here is exactly what to include and how to lay it out.
What every invoice needs
Include your business name, logo and contact details, the client's name and details, a unique invoice number, the issue date and due date, a clear list of what you are charging for, the subtotal, any tax, and the total due. Finish with your banking details so the client knows exactly where to pay.
Number your invoices in order
Give every invoice a unique number and keep them sequential, like INV-2026-0001. It keeps your records clean, makes tax time easier, and looks professional. Good tools number them for you automatically.
Set clear payment terms
State when payment is due (on receipt, or within 7, 14 or 30 days) and how to pay. If you take a deposit, put the split on the document. Clear terms remove the excuse of "I did not know when it was due."
Mistakes that get an invoice queried
Most delayed invoices are held up for small, avoidable reasons. A missing or wrong due date leaves the client guessing. Vague line items like "consulting" invite questions, where "consulting, 6 hours at your rate" does not. Leaving your banking details off means the client has to stop and ask.
Maths that does not add up, or a total that does not match the lines, gets the whole invoice put aside while it is checked. Before you send, read the invoice once as if you were the client about to pay it, and fix anything that would make you pause.
