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 three questions before the client has to ask them — what was the work, how much is owed, and how do they pay. Get those right and you remove the most common excuses for a slow payment.

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 (for example, net 15 or due on receipt)
• Accepted payment methods and instructions (bank transfer details, card link, check payee)

Step by step

1. 1Add your business details and logo. Use the same business name your client signed the agreement or estimate with, so their accounting can match the paperwork.
2. 2Add the client’s details. For companies, address it 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 causes of late payment.
3. 3Assign a unique invoice number and set the invoice date and due date. If your terms are net 15, the due date is 15 calendar days after the invoice date.
4. 4Itemize the work. One line per service or deliverable, with quantity and rate. “Kitchen faucet replacement — labor (2 hrs × $95)” gets paid faster than “plumbing work.”
5. 5Add tax, discounts, or a deposit credit if they apply, and check the total. If the client already paid a deposit, show it as a credit so the balance due is obvious.
6. 6State how to pay, then send the invoice the same day the work finishes — as a PDF, not an editable document.

Mistakes that delay payment

• Vague descriptions — clients stall when they cannot tell what they are paying for
• No due date — “payable on receipt” is fine; a blank is not
• Sending to the wrong person — ask for the accounts payable contact on bigger clients
• No payment instructions — every extra email a client must send you costs days
• Waiting to invoice — invoices sent within 48 hours of finishing get paid noticeably faster than ones sent weeks later
• Reusing an invoice number — duplicates break the client’s books and yours