How to Write an Invoice: A Simple Template and Guide

Getting paid starts with a good invoice. Not a fancy one — a clear one. If you've ever sent a text that said "hey, that'll be $450" and then waited two weeks for a response, you already know why. A real invoice sets an expectation: here's what I did, here's what it costs, here's how and when to pay. That structure alone gets you paid faster than an honor-system text ever will.

Here's how to write an invoice that actually works, plus what to put in each part.

What to include on an invoice

Every invoice needs the same core pieces, regardless of your trade:

• Your business name and contact info — so the client knows who's billing them, and how to reach you with questions.
• Client name and contact info — who owes the money.
• Invoice number — even a simple sequence (1001, 1002...) makes it easy for both of you to reference later.
• Invoice date and due date — the due date is what actually gets you paid on time. Don't skip it.
• Line items — what you did or provided, broken into individual items with quantity, rate, and amount. "Kitchen faucet repair — $180" is fine for simple jobs; break it into labor and materials for bigger ones.
• Subtotal, tax (if applicable), and total due — add it up so the client doesn't have to.
• Payment terms — due on receipt, net 15, net 30, whatever you've agreed to (more on choosing these in our net 15 vs. net 30 guide).
• How to pay — a link, a QR code, a bank account, whatever you accept. The easier this is, the faster you get paid.

That's it. You don't need a logo design degree or software with forty fields you'll never use — you need those eight things, laid out clearly.

A simple invoice template, walked through

Picture a one-page invoice for a plumbing job:

Nothing complicated — just organized. A client can read this in ten seconds and know exactly what they owe and by when.

Common invoice mistakes that slow down payment

• No due date. "Please pay when convenient" isn't a due date — it's an invitation to forget.
• Vague line items. "Services rendered — $400" makes clients pause and ask questions, which delays payment. Be specific.
• No easy way to pay. If the only option is "mail a check," you've added a week to your payment cycle by default.
• Sending it late. Invoice the day the job's done, not whenever you get around to paperwork. The clock on "net 15" should start while the work is still fresh in the client's mind.

Do you need invoicing software, or will a template do?

A one-off invoice? A template works fine. The moment you're sending more than a couple a week, though, retyping client details and chasing payment status in a spreadsheet starts costing you real time — time that's worth more than the software costs. That's really the whole case for a tool: not that a template is bad, just that it stops scaling once invoicing becomes a weekly habit instead of a once-in-a-while task.

Try it yourself: Featherwork's free invoice generator builds exactly the invoice above — branded, professional, print-or-download-ready — with no signup required.