How to Make an Invoice (Step by Step)

An invoice does two jobs at once. It asks a client to pay you, and it creates a record of the sale for both sides. A good invoice answers the three questions every client has before they have to ask: what was the work, what do I owe, and how do I pay? Get those right and you’ve removed most of the standard excuses for paying you slowly.

What Every Invoice Must Include

• Your business name, address, email, and phone number
• The word “Invoice” clearly at the top, not “bill” or “statement”
• The client’s name, company, and billing email or address
• A unique invoice number (see how to number invoices)
• The invoice date and a specific due date
• Itemized line items: description, quantity, rate, and line total
• Subtotal, any tax or discount, and the total amount due
• Payment terms, like net 15 or due on receipt
• How to pay: bank transfer details, a card link, or who to make the check out to

Step by Step

1. 1Start with your business details and logo. Use the same business name your client saw on the estimate or contract, so their bookkeeper can match the paperwork without emailing you about it.
2. 2Add the client’s details. For companies, address the invoice to the person or department that actually pays. An invoice sitting in the project manager’s inbox instead of accounts payable is one of the most common reasons payment runs late.
3. 3Assign a unique invoice number, then set the invoice date and due date. If your terms are net 15, the due date is 15 calendar days after the invoice date. Count them out; don’t guess.
4. 4Itemize the work. One line per service or deliverable, with quantity and rate. “Kitchen faucet replacement, labor (2 hrs x $95)” gets paid faster than “plumbing work.”
5. 5Add tax, discounts, or a deposit credit if they apply, then check the total. If the client already paid a deposit, show it as a credit line so the balance due is obvious at a glance.
6. 6Say exactly how to pay, then send the invoice the same day the work finishes. Send it as a PDF, never as an editable document.

Mistakes That Delay Payment

• Vague descriptions. Clients stall when they can’t tell what they’re paying for.
• No due date. “Payable on receipt” works fine; a blank does not.
• Sending it to the wrong person. On bigger clients, ask for the accounts payable contact before you need it.
• No payment instructions, which forces the client to email you and ask. Every extra round trip costs days.
• Waiting weeks to invoice. Bills sent right after the work finishes get paid noticeably faster than ones sent whenever you get around to it.
• Reusing an invoice number. Duplicates break the client’s books and yours.