How to Chase an Unpaid Invoice

Almost every freelancer and small service business hits this eventually: the work is done, the invoice is sent, the due date passes, and nothing lands in the bank. It is stressful, and it is tempting to either say nothing and hope, or fire off something sharp. Neither works well. The clients who pay late are usually disorganised, not malicious, so a steady, polite, slightly more insistent sequence of reminders gets you paid faster and keeps the relationship intact. Here is how to do it properly.

Prevent late payment before it starts

The cheapest invoice to chase is the one you never have to. Most late payment is set up at the start of a job, not the end, so tighten these basics:

• Take a deposit. For new clients or larger projects, ask for 25-50£ up front, or a percentage. A client who has paid a deposit is far more likely to settle the rest.
• Put payment terms in writing. State them in your proposal and on the invoice itself: "Payment due within 14 days of invoice date." Vague terms invite vague payment.
• Show a clear due date. Do not write "net 30" and assume the client does the maths. Put the actual calendar date the money is due in bold on the invoice.
• Make paying easy. Include your bank details, a reference, and a payment link if you use one. Friction is an excuse.

A clean, professional invoice with all of this on it does half the chasing for you. If yours is a wall of text or a scribbled total, fix that first with the Invoice Generator.

The follow-up sequence that works

Send reminders on a schedule rather than when frustration boils over. Three messages handle the vast majority of cases. Keep them short, keep them friendly, and always make the next step obvious.

1. Gentle reminder - the day after the due date

Subject: Invoice 1042 - quick reminder

Hi Sam,

Hope you are well. Just a quick note that invoice 1042 for £850 was due yesterday and I do not think it has come through yet. It is easy to miss, so no worries at all - I have attached it again below for convenience.

Let me know if you need anything from me to get it processed.

Thanks,
Alex

2. Firm nudge - at 7 days overdue

Subject: Invoice 1042 - now 7 days overdue

Hi Sam,

Following up on invoice 1042 for £850, which is now a week past its due date. Could you let me know when I can expect payment, or if there is a hold-up I should know about?

If it has already been sent, please ignore this and thank you. Otherwise I would appreciate it being settled by the end of this week.

Thanks,
Alex

3. Final notice - at 21 days overdue

Subject: Invoice 1042 - final reminder before next steps

Hi Sam,

Invoice 1042 for £850 is now 21 days overdue and I have not had a response to my earlier emails. I would much rather resolve this directly with you.

Please arrange payment within 7 days. If I do not hear back, I will have to consider further steps to recover the amount. I am happy to discuss a payment plan if cash flow is the issue - just let me know.

Thanks,
Alex

Notice what these do not do: no shouting, no threats, no insults. The tone simply hardens from "you probably forgot" to "this needs sorting now," which is exactly the message you want to send. If writing these every time feels like a chore, the Invoice Follow-up Email Generator drafts one for you in seconds.

If they still do not pay

Most invoices clear during the sequence above. When they do not, you have several escalating options. Work through them in order.

• Pick up the phone. A short, calm call often unsticks a payment that emails could not. People avoid replies more easily than they avoid a direct conversation. Follow up the call with a brief email confirming what was agreed.
• Apply late fees or interest. In the UK, businesses can usually charge statutory interest on late commercial payments, plus a fixed recovery amount, under the Late Payment of Commercial Debts legislation - but the rules depend on your contract and the type of customer. State any late-fee policy in your terms before you rely on it, and check what currently applies to your situation.
• Send a final written notice. A clear letter or email stating the amount owed, the dates, and that you intend to pursue recovery if it is not paid by a set deadline. This often prompts payment on its own and creates a useful record.
• Small claims as a last resort. For genuinely unpaid debts, the small claims process (the Money Claim Online service in England and Wales, with equivalents elsewhere in the UK) is designed to be used without a solicitor. It costs a fee and takes time, so treat it as the final step, not the first.

This is general information, not legal advice. Late-payment rules, interest rates, and the right process vary by country and by the specifics of your contract. For anything significant, check the current official guidance or speak to a qualified adviser before acting.

Keep it from happening again

Once you are paid, do a quick post-mortem. Was the deposit too small or missing? Were the terms unclear? Did you forget to send reminders on time? Most repeat late payers reveal themselves on the first job, so adjust your terms for them specifically - larger deposits, shorter terms, or staged payments. Build the follow-up sequence into your routine so it fires automatically rather than depending on you remembering. The free Client Ops Starter Kit includes templates and a simple system for keeping all of this in one place.

Never lose track of who owes you

The real cost of unpaid invoices is not just the money - it is the mental load of trying to remember who owes what and when you last chased them. A simple tracker turns that anxiety into a checklist. SignalDesk keeps every client, invoice, and follow-up in one view, so overdue payments surface before they become a problem and nothing slips through the cracks.

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