How to Invoice as a Freelancer
A practical guide to getting paid: what belongs on your invoice, how to number it, which payment terms actually work, and what to do when a client pays late.
What every freelance invoice must include
An invoice is a formal request for payment, and in most countries it doubles as a tax document. Whatever you do, always include:
- Your details — your name or business name, address, and email. Add your tax or VAT number if you have one.
- Your client's details — the legal name of the company paying you, not just your contact's first name, plus their billing address.
- A unique invoice number — every invoice needs its own number, and the sequence should be unbroken (more on this below).
- Invoice date and due date — the day you issue it, and the day payment is due.
- Line items — what you did, the quantity or hours, the rate, and the amount per line.
- Totals — subtotal, any discount, any tax, and the final amount due, with the currency stated clearly.
- How to pay you — bank account or IBAN, and any payment reference the client should use.
Miss any of these, and your invoice is likely to bounce around an accounts-payable department while someone asks for a "corrected invoice" — costing you weeks.
Invoice numbering done right
Tax authorities in most countries expect invoice numbers to be sequential and gapless — INV-0001, INV-0002, INV-0003. A simple prefix-plus-counter scheme is all you need. Some freelancers embed the year (2026-0001) and reset each January, which is also fine as long as the sequence within the year is unbroken. Never reuse a number, and if you cancel an invoice, keep the number and issue a credit note instead of pretending it never existed.
Payment terms that get you paid faster
The classic default is Net 30 — payment within 30 days. For freelancers, that's usually too generous. Studies of invoicing behaviour consistently show shorter terms get paid faster without harming the client relationship:
- Net 14 is a reasonable default for ongoing clients.
- Due on receipt works for small one-off jobs.
- 50% upfront is standard for larger projects — don't be shy about it.
Sending the invoice
Send a PDF, not an editable document — PDFs look professional and can't be accidentally altered. Email it to the right person (ask your contact who handles invoices; in bigger companies it's rarely them), put the invoice number in the subject line, and keep the email short: one line saying what it's for, the amount, and the due date.
Handling late payments
Most late payments are forgetfulness, not malice. A simple escalation works:
- Day after due date: a friendly one-line reminder with the invoice re-attached.
- One week late: a firmer email asking for a payment date.
- Two weeks late: a phone call. Awkward, but remarkably effective.
- Beyond that: mention late-payment interest if your jurisdiction allows it (in the EU, business-to-business late payment interest is a legal right), and pause further work until the account is settled.
Invoicing international clients
Working across borders? Invoice in the currency you agreed, state it unambiguously (USD, EUR, GBP — not just "$"), and give the client a low-friction way to pay. International bank wires are slow and expensive on both ends; services built for cross-border payments (such as Wise or Payoneer) typically cost a fraction of a traditional bank transfer and let you receive money with local account details.
Taxes in one paragraph
Whether you add tax to your invoice depends on where you are and who your client is: US freelancers mostly don't charge sales tax on services (it varies by state), EU freelancers charge VAT domestically but often reverse-charge it for business clients in other EU countries, and most countries have a small-business exemption below a revenue threshold. When in doubt, a one-hour conversation with a local accountant pays for itself many times over. See our US template guide and EU template guide for specifics.
Make the invoice itself in 60 seconds
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