How to Create an Invoice (Step by Step)

Before you start: what you need

Gather five things before you write your first line: your business details, your client's billing details, a description of what you delivered, the price you agreed on, and when you expect to be paid. That is the entire raw material of an invoice — everything else is presentation.

The 8 parts of an invoice, step by step

1. Your business details. Your name or company name, address, and email — usually top-left. If you operate under your own name, that is perfectly fine: "Jane Rivera, Web Development" is a valid business header.
2. The word "Invoice" and an invoice number. Label the document clearly and give it a unique number, such as INV-0042. Numbers let you and your client refer to the invoice unambiguously, and they keep your records tidy. Use a consistent sequence and never reuse a number.
3. Issue date and due date. The issue date is when you send the invoice; the due date is when payment is expected. Common conventions are "Due on receipt", Net 15, or Net 30 — meaning payment is due 15 or 30 days after the issue date. Shorter terms get you paid sooner; agree on them with the client before the work, not after.
4. Your client's details. The "Bill to" block: the client's company name, a contact person, and their billing address or email. For larger companies, ask whether invoices should go to a specific accounts-payable address — sending it to the wrong inbox is one of the most common reasons invoices sit unpaid.
5. Line items: what you did and what it costs. One row per service or product: a clear description, quantity or hours, the rate, and the amount. "Homepage redesign — 12 hours × $85" is better than "design work", because your client's bookkeeper can approve it without asking questions. Questions are delays.
6. Subtotal, tax, discount and total. The subtotal is the sum of your line items. Apply any agreed discount, then tax if you are required to charge it (rates and rules depend on where you and your client are — check with a professional if you are not sure), then shipping if it applies. The final line is the total due — make it the most prominent number on the page.
7. Payment terms and how to pay. Tell the client exactly how to pay you: bank transfer details, PayPal, or whatever you accept. The easier you make this step, the faster you get paid. This is also the place for late-fee terms, if you agreed on any.
8. Notes. A short thank-you, a project reference, or anything the client should know. Keep it brief — an invoice is a payment request, not a letter.

A worked example

Here is how those parts come together for a freelance designer invoicing a client for a small project:

Notice what makes it work: every line is specific, the math is visible, the due date is unmissable, and the client knows exactly how to pay.

Five mistakes that delay payment

• Vague line items. "Consulting — $2,000" invites questions. Specific descriptions get approved faster.
• No due date. An invoice without a due date is a suggestion. Always state one.
• Missing payment instructions. If the client has to email you to ask how to pay, you have added days to the process.
• Wrong recipient. Confirm where invoices should go — for many companies that is an accounts-payable inbox, not your day-to-day contact.
• Math errors. A single wrong total can bounce an invoice back a full billing cycle. Use a tool that calculates for you rather than a hand-edited document.

What should you make the invoice with?

Any tool works if the result is clear and correct: a word processor, a spreadsheet, or an online invoice generator. The practical difference is speed and error rate — hand-built documents are where math mistakes and formatting drift come from. An online invoice generator calculates totals, tax and discounts for you and produces a clean PDF your client can open anywhere. Ours is free, requires no signup, and does not store your invoice data.

Frequently asked questions