Use an actual due date
“Net 14” usually means payment is due 14 days after the invoice date. An explicit date is easier to check. For example, an invoice dated 3 October 2026 with 14-day terms would show a due date of 17 October 2026. Use the timing agreed with the client.
Explain how to make the payment
Include the agreed payment method, the details needed to use it, and the invoice reference. For example: “Please pay by bank transfer by 17 October 2026. Use INV-2026-014 as the reference.” Add and verify the actual account details separately.
Make the payment process easy to navigate
Ask the client whether they require a purchase order or a billing portal submission. Check who handles payment. A correctly addressed invoice with the right reference is easier to match to the approved work.
Follow up with the facts
When an invoice remains unpaid, check that the client received it and refer to the invoice number, original due date, and amount outstanding. Use a courteous reminder. Any late-payment fees or interest need to reflect applicable rules and the agreement; do not add arbitrary charges.
These guides explain everyday invoicing workflows. Examples are illustrative; check the rules that apply to your business and location.
Reference: GOV.UK — UK invoice requirements ↗