What to Put on an Invoice So It Actually Gets Paid

A customer goes quiet on a ₦850,000 invoice. You call after six weeks and their accounts clerk tells you it was never entered into the system because it had no PO number on it. That is not a payment problem. That is an invoice problem, and you caused it.

Most late payments are not malice. They are friction. Every field you leave off an invoice is a gap somebody in accounts payable has to fill, and filling gaps for a supplier is nobody's priority. Your job is to send a document so complete that there is nothing left to ask you.

The fields that remove the excuses

A payable invoice answers five questions without anyone picking up a phone: who is this from, who is it for, what is it for, how much, and when and how do I pay.

• Your details and theirs. Your registered business name, address, phone, email, and tax ID. Their exact registered entity name, not the trading name you use in conversation. Companies pay entities, and a mismatch stalls the invoice while somebody checks.
• An invoice number. Sequential and unique. It is how both of you refer to this document for the rest of its life.
• Invoice date and due date. Two separate lines, both spelled out.
• Their PO or reference number. If your customer runs a purchase order system, an invoice without the PO is not late, it is invisible. Get the PO before you start the work, not after you have billed for it.
• Line items that match what you quoted. Description, quantity, unit price, line total. If they approved a quote, mirror its wording, so the clerk comparing your invoice to the PO sees the same words twice.
• Subtotal, VAT, and total due. Show the arithmetic. A single lump sum invites a question, and questions cost you a week.

Two more that cost you nothing: name the person who ordered the work, and give a billing contact on your side. When the invoice lands in a shared inbox, whoever opens it should know instantly who approved this and who to reply to.

Write the date, not the term

"Net 30" is jargon. It also quietly asks the reader to do arithmetic and to decide whether the clock starts on the invoice date, the delivery date, or the day their finance team got around to opening the email.

Write it plainly. Payment due 12 August 2026, in bold, near the total, where the eye lands. Keep the term in the small print if you like, but the date is what a person acts on. A date can go in a diary. A term gets deferred. If you are still working out what terms to offer in the first place, payment terms explained covers Net 15 versus Net 30 and when each one makes sense.

Make paying take under a minute

The last few lines of the invoice decide more than you think. If a customer has to email you to ask how to pay, you have added days for no reason.

Put your full bank details on every invoice: account name, account number, bank. Not "our usual account". Not a reference to an email you sent in March. On the invoice, every time, including for the customer you have billed monthly for two years.

Then tell them what reference to use on the transfer, and make it the invoice number. Payments that arrive with no reference are nearly as bad as payments that do not arrive, because you cannot match them, and you end up chasing a customer who has already paid you. If you accept card or a payment link, put the link in the email as well as the PDF. Every extra step is a chance for the invoice to go back on the pile.

Send it to the right place, the same day

An invoice sitting in your drafts folder earns nothing. Send it the day the work is finished or the milestone is hit. Days you lose at your end are days you never get back, and a slow invoice tells the customer you are relaxed about the money.

Send it to the accounts payable address and copy the person who hired you. The buyer will not pay it, but they can unblock it, and they are the one who will hear from you if it goes quiet. If the company uses a supplier portal, use the portal. Emailing an invoice to somebody who needs it uploaded is the same as not sending it at all.

Then track the ones that go quiet

A clean invoice removes the excuses, but it does not remove the follow-up. Plenty of correct invoices still get paid only because somebody chased. Arvalox keeps every invoice you send against its real due date, flags it the moment it slips from current to overdue, and sends the reminder for you, so the chase happens on the day it should rather than the day you finally remember.