An invoice is a request for payment that also works as a record for both of you. A clear invoice gets paid faster: the client's accounts team can see what it's for, who to pay and by when. Here's exactly what to put on one.
What to include on an invoice
- Put the word Invoice at the top. Label the document clearly as an invoice (or tax invoice, if your country requires that wording).
- Add your business details. Your name or business name, address, email or phone, and your tax registration number if you have one.
- Add the client's details. The client's name or company, their address, and a contact person or email if they have an accounts team.
- Give it a unique invoice number. Use a sequence you never repeat, such as INV-0001, INV-0002 or 2026-014.
- Add the invoice date and due date. The date you issue it, and when payment is due, for example 30 days later (Net 30).
- List what you're charging for. One line per product or piece of work: a clear description, quantity or hours, rate, and the line amount.
- Show subtotal, tax and total. Subtotal, any discount, each tax with its rate, shipping if any, and the total due in a stated currency.
- Explain how to pay. Bank details, PayPal or other payment method, and any late-payment terms you've agreed.
- Send it and keep a copy. Send the PDF by email with a short note, and keep a copy for your records and taxes.
A simple example
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Logo design, 3 concepts and 2 rounds of revisions | 1 | $450.00 | $450.00 |
| Website copywriting (hours) | 6 | $55.00 | $330.00 |
| Subtotal | $780.00 | ||
| Sales tax 0% (services not taxed in this example) | $0.00 | ||
| Total due by Dec 14, 2026 | $780.00 | ||
Invoice numbering that won't trip you up
- Never reuse or skip around; tax offices in many countries expect a continuous sequence.
- A prefix helps you sort:
INV-0042, or a yearly reset like2026-001. - If you correct a sent invoice, issue a new one (or a credit note) rather than editing the old number.
Freelancer tips that get you paid sooner
- Invoice right away when the work is delivered, not at the end of the month.
- Agree terms up front (deposit, due date, late fees) before you start. See payment terms explained.
- Name the PDF clearly, for example Invoice INV-0042 - Acme Ltd.pdf, so it's easy to find in their inbox.
- Follow up politely on the due date; here are five reminder templates.
- Track it. A simple income log is enough; see our bookkeeping basics for a side business.
Invoice, quote or receipt?
A quote (or estimate) comes before the work and says what it will cost. An invoice asks for payment after. A receipt confirms you've been paid; see how to make a receipt.
Questions
Do I need to register a business to send an invoice?
In many places, no: freelancers and sole traders can invoice under their own name. You may need to register for sales tax, VAT or GST once you pass a threshold. Check your local rules.
What file format should an invoice be?
PDF is the safest choice: it looks the same on every device and can't be edited by accident.
Can I send an invoice before the work is done?
Yes, for a deposit or upfront payment, if you've agreed it. Mark it clearly as a deposit invoice and show the remaining balance later.
General information, not legal, tax or accounting advice. Rules differ by country and state; check yours or ask a professional.
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