Most freelancers will eventually send an invoice that is not paid on time. A short, factual reminder is usually a better opening than a long complaint.
Sometimes the customer has simply overlooked it. Sometimes the invoice is waiting for approval. Occasionally there is a genuine dispute. The first message should find out which situation you are in, not assume the worst.
Before you send a reminder
Check that the invoice has passed its agreed due date. Confirm it was sent to the correct contact, that it includes any purchase order or supplier information the client needs, and that you have not already received the payment under a slightly different reference.
Then gather the details: invoice number, amount, due date, project name and a copy of the invoice. If the client has raised a dispute about the work, deal with that issue directly instead of treating it as a missed payment.
Example 1: a friendly reminder just after the due date
Subject: Invoice INV-2026-014: payment follow-up
Hi Sam, I hope you're well. I'm following up on invoice INV-2026-014 for £750, which was due on 24 November. I've attached a copy in case it is helpful. Could you let me know whether this has been scheduled for payment? Thanks, Alex
This works because it gives the recipient a straightforward next step. It does not accuse them of ignoring the invoice, and it keeps the details short.
Example 2: a reminder one week later
Subject: Outstanding invoice INV-2026-014 (£750)
Hi Sam, I'm checking again on invoice INV-2026-014 for £750, originally due on 24 November. I haven't been able to match a payment to it yet. Could you confirm when payment is expected, or let me know if anything is missing that your accounts team needs? I've attached the invoice again for reference. Thanks, Alex
At this point, asking for an expected date is reasonable. If the reply gives a specific date, record it and follow up against that commitment if necessary.
Example 3: a firmer message after repeated follow-ups
Subject: Payment required: invoice INV-2026-014
Hi Sam, invoice INV-2026-014 for £750 remains outstanding despite my earlier reminders. It was due on 24 November. Please arrange payment or confirm a firm payment date by 8 December. If there is a dispute or an administrative issue preventing payment, please explain it so we can resolve it promptly. I've attached the invoice once more. Regards, Alex
Choose a realistic response deadline for your circumstances. Do not threaten legal action unless you genuinely intend to take appropriate steps and have considered the relevant procedures.
Example 4: when the client says the invoice never arrived
Subject: Re-sending invoice INV-2026-014
Hi Sam, thanks for letting me know. I've attached invoice INV-2026-014 again, along with the project reference. Could you confirm that it has arrived and that your finance team has everything needed to process it? Thanks, Alex
This is not the moment to argue about who lost the first email. Solve the practical problem and keep a record of the exchange.
Example 5: when the client promises a date and misses it
Subject: Follow-up on agreed payment date
Hi Sam, you mentioned that invoice INV-2026-014 would be paid by 5 December, but I haven't received it yet. Please could you check and confirm when the transfer will be made? The outstanding balance is £750. Many thanks, Alex
A message that refers to a specific commitment is more effective than another generic reminder.
How often should you chase?
There is no perfect schedule, but a practical starting point for an ordinary freelance invoice is a friendly message shortly after it becomes overdue, another reminder about a week later if unanswered, and a firmer follow-up if the balance remains outstanding.
Adjust this to the amount owed, the client relationship, any response you receive and the contract. A disputed invoice or serious non-payment may need a different process. Avoid emailing every day, copying unrelated colleagues or sending emotional messages. Keep correspondence professional and keep copies.
Can you charge late-payment interest in the UK?
For qualifying late payments between businesses, UK rules can allow statutory interest and fixed recovery costs. GOV.UK describes statutory interest as 8% above the Bank of England base rate, subject to important contract and transaction rules.
Whether you can claim it, and how it is calculated, depends on the circumstances. Check the official guidance before adding interest or recovery costs. A private consumer owing money is not automatically covered by the same commercial rules.
Keep invoice records separate from email reminders
It is easy to lose track of a payment if you rely on the last email in a long project conversation. Keep the original PDF, the agreed terms, any purchase order and a note of the reminders you have sent.
Most late invoice problems are easier to resolve when the paperwork is clear and the first reminder is calm. State the facts, ask a direct question and keep a written record of the response.
Sources and further reading
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