In short: The best invoice wording for immediate payment states the deadline as a date, not a duration, and puts it where it cannot be missed. Use: "Payment due on receipt. Please pay £1,250 GBP by 14 August 2026 using the payment link below." Three things make that line work: an exact amount, an exact date, and a payment method that takes one click.
Wording alone will not fix a late payer. It removes the excuses, which is the part you control.
Most invoices are not paid late because the customer refuses to pay. They are paid late because the invoice left room for interpretation: "payment terms: 30 days" with no date, an amount buried in a total column, and bank details in a footer nobody reads. According to The 2026 accounts receivable report, 92% of businesses have invoices paid after the due date.
This guide gives you the exact wording to use, term by term, plus the late-payment lines that are actually enforceable in the UK.
Invoice wording for immediate payment: the lines to copy
Pick the line that matches how firm you need to be. All three assume you have already agreed terms with the customer.
| Situation | Wording |
|---|---|
| Standard, friendly | "Payment due on receipt. Please pay £1,250 GBP by 14 August 2026 using the payment link below. Thank you for your business." |
| New customer or first job | "Payment terms: due on receipt. Please settle £1,250 GBP by 14 August 2026. Work on the next stage begins once payment clears." |
| Customer with a late history | "Payment due on receipt, and in any event by 14 August 2026. Invoices unpaid after this date accrue statutory interest and a fixed recovery charge under the Late Payment of Commercial Debts (Interest) Act 1998." |
Notice what each line does: it names the amount, names the date, and names the next step. "Payment terms: 30 days" does none of those, which is why it gets ignored.
Payment terms wording, term by term
These are the standard terms and the plain wording to put beside each one. Always follow the shorthand with a real date, because customers count days differently to you.
| Term | What it means | Wording to use |
|---|---|---|
| Due on receipt | Payable immediately | "Payment due on receipt. Please pay by 14 August 2026." |
| Net 7 | 7 days from the invoice date | "Payment terms: net 7. Payment due by 21 August 2026." |
| Net 14 | 14 days from the invoice date | "Payment terms: net 14. Payment due by 28 August 2026." |
| Net 30 | 30 days from the invoice date | "Payment terms: net 30. Payment due by 13 September 2026." |
| EOM | End of the month of invoice | "Payment terms: EOM. Payment due by 31 August 2026." |
| 15 MFI | 15th of the month following invoice | "Payment terms: 15 MFI. Payment due by 15 September 2026." |
| PIA | Payment in advance | "Payment in advance. Work is scheduled once £1,250 GBP has cleared." |
| Stage payments | Split across milestones | "Stage 1 of 4: £1,250 GBP due by 14 August 2026. Stage 2 invoiced on completion of design sign-off." |
| Early settlement discount | A reduction for paying early | "2% discount if paid within 10 days (by 24 August 2026). Full amount due by 13 September 2026." |
What has to appear on the invoice
Wording only helps if the invoice is valid. Miss one of these and the customer has a legitimate reason to hold payment while they query it.
- The word Invoice, clearly, at the top
- A unique, sequential invoice number
- Your business name, address, and contact details
- The customer's name and address
- The invoice date and the supply date, if they differ
- The customer's purchase order number, where they use one
- A separate line for each product or service, with quantities and prices
- The total payable, stated once and stated plainly
- Payment terms, the due date, and how to pay
UK VAT note: if your business is VAT registered, a VAT invoice also needs your VAT registration number, the VAT rate applied to each line, and the total VAT charged. If the customer is VAT registered in another country and the reverse charge applies, the invoice must say so.
Late payment wording that is actually enforceable
Vague threats invite arguments. Naming the legislation does not. This section applies to business-to-business invoices in the UK.
Under the Late Payment of Commercial Debts (Interest) Act 1998, you can charge statutory interest at 8% above the Bank of England base rate. For invoices falling due in the second half of 2026 that is 11.75% a year. You can also charge a fixed sum toward recovery costs, on a sliding scale by debt size:
| Invoice value | Fixed recovery charge |
|---|---|
| Up to £999.99 GBP | £40 GBP |
| £1,000 to £9,999.99 GBP | £70 GBP |
| £10,000 GBP and above | £100 GBP |
Wording for the invoice footer: "Late payment terms: invoices unpaid after the due date accrue statutory interest at 8% above the Bank of England base rate, plus a fixed recovery charge, under the Late Payment of Commercial Debts (Interest) Act 1998."
This is general guidance, not legal advice. Rules differ outside the UK, and your own contract terms may override the statutory position.
Five rules for wording that gets paid
- Give a date, never a duration. "Net 30" makes the customer do arithmetic. "Due by 13 September 2026" does not.
- State the amount in the sentence. Not only in the totals column. The number should appear where the instruction appears.
- Make paying one click. Every extra step, from finding bank details to raising a payment run, is a day added to your days sales outstanding.
- Keep the tone warm and the terms firm. Those are not in conflict. Politeness costs nothing; ambiguity costs weeks.
- Say the same thing every time. Customers learn what you tolerate. Consistent wording across every invoice sets the expectation far better than a strongly worded one-off.
When wording stops being the problem
Perfect wording gets you the invoices that were always going to be paid, paid a little sooner. It does nothing for the customer who read it, understood it, and still has not paid. That gap is what chasing covers, and it is where most finance teams lose their week: 76% spend three or more hours a week on accounts receivable tasks (The 2026 accounts receivable report).
Automating that layer changes the outcome measurably. Businesses using accounts receivable automation software are 52% more likely to be paid within two weeks of the due date than those chasing manually, and combining SMS with email reminders makes payment within two weeks 49% more likely than email alone.
See what automated chasing would do to your days sales outstanding.
Speak to an expertFrequently asked questions
What is the best invoice wording for immediate payment?
"Payment due on receipt. Please pay [amount] by [date] using the payment link below." It works because it gives an exact amount, an exact date rather than a duration, and a payment method that takes one click, so there is nothing left to interpret or postpone.
What is the correct wording for 30 day payment terms?
"Payment terms: net 30. Payment due by [date]." Always pair the shorthand with the actual date. Net 30 usually runs from the invoice date, but some customers count from delivery or from month end, and that assumption is where two weeks quietly disappear.
Does "due upon receipt" mean the same as "due immediately"?
In practice, yes: both mean payment is expected as soon as the invoice arrives. Neither phrase is precise enough on its own, because a customer receiving an invoice on a Friday evening may reasonably read it as due the following week. Add a date and the ambiguity disappears.
Can you charge interest on a late invoice in the UK?
For business-to-business invoices, yes. The Late Payment of Commercial Debts (Interest) Act 1998 allows statutory interest at 8% above the Bank of England base rate, which is 11.75% a year for invoices falling due in the second half of 2026, plus a fixed recovery charge of £40, £70 or £100 GBP depending on the size of the debt. You can charge it whether or not the invoice mentions it, though stating it up front makes it far less contentious.
Does firmer invoice wording damage customer relationships?
Clear terms rarely cause friction; inconsistent enforcement does. A customer who is chased at 40 days on one invoice and 90 days on the next learns that the due date is negotiable. Stating the same terms every time, warmly, is what keeps the relationship comfortable and the payment predictable.
What wording should you use when an invoice is already overdue?
Move from a due date to a deadline, and name what happens next: "Invoice [number] for £[amount] GBP was due on [date] and is now [n] days overdue. Please pay by [new date] to avoid statutory interest and recovery charges being applied." For the full escalation sequence, see the guide to writing a demand letter for payment.
Getting started
Open your invoice template and check three things: does the due date appear as a real date, does the amount appear inside the payment instruction, and can the customer pay without leaving the invoice? Fixing those three is usually a fifteen-minute job and it is the cheapest days sales outstanding improvement available to you. Then decide what happens on day one, day seven, and day thirty after the due date, because that sequence is what actually collects the money. Chaser's guide to accounts receivable automation covers how to run it without doing it by hand.
