How to invoice as a freelancer (step by step)
Updated 2026-06-19
Invoicing is the step between doing the work and getting paid — and small mistakes here are the most common reason freelancers get paid late. Here’s the whole thing, start to finish.
1. Agree the terms before you invoice
The invoice should only ever confirm what was already agreed. Before the work starts, settle the price, the payment terms (e.g. NET 14), any deposit, and the late-payment terms — ideally in a quote and a contract. An invoice that surprises the client is an invoice that gets queried and delayed.
2. Put the essentials on the invoice
A professional invoice needs:
- A unique invoice number (sequential — see invoice numbering);
- Your details and the client’s details (the correct billing entity and contact);
- Issue date and due date (a specific date, not “NET 30” alone);
- An itemised list — what you did, quantity, rate, amount;
- The total, plus any tax;
- How to pay — bank details, payment link, accepted methods.
Make one in two minutes with the invoice generator, or start from the invoice template. Full checklist: what to include on an invoice.
3. Send it promptly — and to the right person
Invoice as soon as the work (or milestone) is done. Every day you delay is a day later you get paid. Send it to the person who actually pays — often accounts payable, not your day-to-day contact — and confirm they received it, so “I never got the invoice” can’t stall you later.
4. Make paying effortless
The easier it is to pay, the faster you’re paid: include a payment link or clear bank details, and offer the methods your clients prefer. Friction — “which account?”, “can you resend?” — is just delay in disguise.
5. Follow up on a schedule
Most late invoices aren’t refusals; they’re forgotten. Have a simple cadence: a reminder a few days before the due date, on the due date, and at 7 / 14 / 30 days overdue. Use the reminder templates or let AI write the reminder — and if it’s badly overdue, escalate to a demand letter.
Common mistakes that delay payment
- Invoicing late or in a batch at month-end — invoice on completion.
- No due date, or vague terms — state an exact date.
- Wrong recipient — find out who actually pays.
- No late-payment terms — agree them up front so you can charge interest.
- No follow-up — silence reads as “no rush”.
Get these right and most invoices pay themselves. For the ones that don’t, the fix is a consistent, automatic follow-up — which is exactly what Duefy does for you.