How to invoice a client, step by step

An invoice has one job: tell the client exactly what they owe, why, and by when. Get those three things right and most clients pay without a follow-up. Get them vague and you create the ambiguity that late payers hide behind.

1. Put your details at the top

Your business name (or your name, if you trade as yourself), address, and email. A logo is optional but makes the invoice easier to spot in a busy inbox. If you have a registered business number or VAT/tax ID, include it — larger clients often can't process a payment without one.

2. Name the client properly

Use the legal or trading name of whoever is paying, not just your day-to-day contact. If the client has an accounts payable team, add their email too, and ask upfront whether they need a purchase order number on the invoice — missing PO numbers are a classic reason invoices bounce.

3. Give it a number and a date

Every invoice needs a unique number (INV-001, INV-002, …) and an issue date. Numbers make follow-ups easy ("checking on INV-014") and keep your records sane at tax time. The free invoice generator increments the number for you automatically after your first invoice.

4. Itemise the work

One line per deliverable or time block, each with a quantity, rate, and amount. "Website build – 20 hrs @ $75" gets paid faster than "Website work – $1,500", because the client can check it against what they remember approving. Specific descriptions also protect you if a charge is ever disputed.

5. State the total and the due date

Show the subtotal, any tax, any discount, and a bold total due. Then state the due date as an actual date — "Due 30 May 2026" — not just "Net 30". Terms like Net 15 or Net 30 mean the invoice is due that many days after the issue date; our Net 30 explainer covers which term to pick.

6. Say how to pay you

Bank transfer details, a payment link, or both. The easier you make the paying step, the sooner it happens. Add a short thank-you line in the notes field — it sounds soft, but polite invoices genuinely get paid faster.

7. Send it the day the work is done

The biggest invoicing mistake is waiting. Send the invoice as soon as the work is delivered (or on the schedule your contract sets). The clock on your payment terms only starts when the invoice lands, and clients mentally budget for invoices as they arrive — a month-late invoice feels optional to them.