Freelance invoice: what to put on it so you get paid on time

A freelance invoice has one job: to be paid without a follow-up. Most late payments are not disputes — they are documents that could not be processed. A missing purchase-order number, an address that does not match the client's records, or a due date nobody agreed to, and your invoice goes to the bottom of an accounts-payable queue where it waits for someone to ask a question.

The fix is dull and reliable: every field the payer's system needs, filled in the same way every time.

What belongs on a freelance invoice

• The word "Invoice", plus a unique invoice number in a sequence you never reuse.
• Issue date and payment due date — an actual date, not "net 30" alone.
• Your legal name or trading name, address, and tax identifier where your country requires one.
• The client's legal entity name and billing address, exactly as their finance team writes it — not the name of the person who hired you.
• Their reference: purchase order, project code or contract number, if they use one. This single field causes more delays than any other.
• Line items: what was delivered, quantity or hours, rate, and the amount for each line.
• Subtotal, tax lines shown separately, and the total due in the agreed currency.
• Payment details: account details or a payment link, and any reference the payer must quote.
• Terms: late-payment interest if you charge it, and what happens after the due date.

Ask for the invoicing requirements before you start the work, not after you finish it. "Who should this be addressed to, and is there a PO number?" takes one email at the start and saves a fortnight at the end.

Terms that shorten the wait

Net 30 is a convention, not a law. For solo work, net 14 is entirely normal and often accepted without comment — but only if it is in the agreement before the first invoice, not introduced afterwards. For a first engagement with a new client, or for a project of any size, split the work: a deposit up front, a payment at an agreed milestone, and the balance on delivery. This is standard practice, and a client who refuses any structured payment is telling you something useful.

Two habits do the rest. Invoice the day the work is accepted, because the clock only starts when the invoice arrives. And send it to the accounts-payable address as well as your contact — your contact is on holiday more often than the finance inbox is.

Chasing without damaging the relationship

1. Two days before the due date, send a short, friendly note confirming the invoice is scheduled for payment. This catches the invoices that were never entered into the system at all.
2. On the day after the due date, reply in the same thread, restate the invoice number and amount, and attach the PDF again.
3. At a week overdue, ask directly whether anything is blocking approval, and offer to resend to the right address. Most of the time something practical is wrong.
4. At two weeks, refer to the terms in your agreement and give a specific date by which you expect payment.
5. Keep every message factual and short. Escalation works best when the earlier notes were calm.

Ettex Invoices exists to make that routine cheap: an invoice builder with line items, multiple tax rates and discounts, sequential auto-numbering with your own prefix, your logo and colours on every document, a lightweight client book so addresses stay consistent, recurring invoices for regular clients, and statuses from draft to sent to paid so you can see at a glance what is overdue. Invoices export as print-ready PDFs and the books as CSV or XLS, which is what your accountant will ask for anyway.

Mistakes that cost freelancers the most

• Reusing invoice numbers or restarting the sequence each year without a prefix — it makes your records ambiguous and audits harder.
• Describing a month of work as one line reading "consulting". Vague lines get queried; specific lines get approved.
• Leaving tax off, or folding it invisibly into the total. Show it as its own line.
• Sending the invoice as an editable document. Send a PDF.
• Never mentioning terms until the payment is late. Terms only help if they were agreed in advance.

A freelance invoice that is complete, specific and consistent gets paid on schedule far more often than one that is merely polite. Build it once as a template, and let the routine do the chasing for you.