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What to Do When a Client Doesn't Pay (After the Reminders)

You sent the invoice. You sent a reminder. Maybe you sent two. The due date is behind you, and the client has gone quiet — or they keep saying payment is "scheduled" and it never arrives. This is the point where another friendly nudge usually stops helping.

This is not legal advice. It is a practical sequence: protect your time, find the actual blocker, and escalate in writing only as far as the amount is worth.

Late and missing payments are a regular part of independent work, which is why the silence feels worse than it should. IPSE's research on late payment in the self-employed sector found that 35% of freelancers had not been paid on time by a client in the previous 12 months, and that those who were owed money were owed an average of £5,230 (IPSE). You are not being unreasonable by treating an unpaid invoice as a business problem that needs a next step.

First, separate "late" from "won't pay"

These are different problems, and they need different responses.

Late usually looks like this: the client was easy to work with, they approved the work, and then the invoice stalled. Common causes are a missing purchase order, an invoice sent only to the project contact, a monthly payment run you missed, or a typo in the bank details. The work is not in dispute. Follow-up, a phone call, and the right billing contact often clear it.

Won't pay looks different: the client disputes scope after the fact, asks for more unpaid work before they will release the payment, goes silent after receiving the files, or offers a new project as a substitute for settling the old invoice. Reminders will not fix that. You need a written position, a deadline, and a decision about whether you will keep working with them.

If you are not sure which one you are in, ask a direct question: "Is there anything on this invoice you need me to change, or can you confirm the date it will be paid?" Their answer, or their silence, tells you what to do next.

Stop doing unpaid work

If you are still delivering, pause. Say it plainly, once, in writing:

I still have invoice [number] for [amount] outstanding, originally due [date]. I need to pause further work until that invoice is settled. Happy to pick things back up as soon as payment is received.

This is not a punishment. It is a boundary. Continuing to ship files, attend calls, or start "just one more" revision while an invoice sits unpaid makes the balance larger and your leverage smaller.

If they ask for source files, credentials, or a final export before paying, hold those back unless you already agreed to hand them over. If source files were not in the estimate, they can wait until the invoice is paid, or be quoted as a separate line.

Do not start a new project with a client who still owes you, even if they offer to settle the old invoice on the next job. Money in your account is a plan. A hope that their sales improve is not.

Get the invoice in front of the person who can actually pay it

If you have only been writing to the person who hired you, they may not be able to release the payment. For a company, ask for:

Then resend the invoice to AP, copy your contact, and put the PO, invoice number, amount, due date, and payment link in the first few lines. A large client's "we'll pay it this week" often means "I submitted it." If it missed the cutoff, it sits until the next cycle.

If your contact has gone silent, send the same short, factual note to the company's billing address or to a second person you already know there.

Get on a call, then put the answer in writing

If two or three emails have had no useful reply, call. Emails are easy to postpone. A conversation usually produces one of three outcomes: they pay, they give a date, or they finally say what is wrong.

Keep the call short. State the invoice number, the amount, and the due date. Ask when it will be paid, or what they need from you. If they say cash is tight, you can offer a short written payment plan — for example, half this week and the balance on a named date — but only if they put something across immediately. A plan with no first payment is just another delay.

As soon as the call ends, send a confirmation email:

Thanks for the call just now. As discussed, invoice [number] for [amount] will be paid on [date] by [method]. I'll mark my records accordingly.

If they later go quiet, you have a written promise, not a memory of one.

Send one formal notice, then decide

When reminders and a call have not produced payment or a credible date, send a single formal notice. This is still an email or a letter, not a court filing. Make it short:

For a larger amount, a physical letter sent in a way that produces a delivery record can carry more weight than another email, because it is harder to claim it was never received. Keep the tone flat. You are creating a record.

If you work with UK businesses, official guidance explains when a commercial payment is late and how statutory interest and fixed recovery costs work for business-to-business invoices. Read it on GOV.UK before you mention those rights. Statutory interest is 8% plus the Bank of England base rate, and the fixed recovery sums are £40, £70, or £100 depending on the size of the debt, unless a contract already sets a different interest rate. This is not legal advice, and it does not apply to every situation. If you are outside the UK, check the rules where you and the client are based, and do not invent fees that were not in your agreement.

After the deadline, pick a path that matches the amount and your appetite:

Do not threaten a court or collections if you will not follow through, and do not post about the client on social media.

Build a file as you go

If this ever leaves your inbox, you will want a packet, not a scavenger hunt. From the first reminder, keep:

A simple spreadsheet is enough: invoice number, client, amount, due date, status, last contact, promised date, next action. Review it once a week. Monday is fine. The point is that an overdue invoice should not depend on you happening to remember it on a Friday afternoon.

Prevent the next one

Once you have lived through a non-paying client, change the default for everyone new: a deposit or milestones so you are never owed the whole project at once; written terms for due dates, late payment, and final-file handover; invoices sent the day work is accepted, with a payment link, to the right billing contact; retainers billed in advance; and a rule you actually keep — one materially overdue invoice pauses new work.

None of that makes you difficult. It makes the commercial relationship visible before someone is already holding your work.

If you want the early reminders off your plate

The steps above are for invoices that have already stalled. Many never need to get that far; they needed a heads-up before the due date and a firm note a week later, sent on time.

Payment Watch is built for that earlier part. It sends polite, escalating reminder emails in your name, stops when Stripe or QuickBooks shows the invoice as paid (or when you mark it paid), and can be paused if you are already talking to the client. You can connect Stripe or QuickBooks, or add invoices yourself. It is free for 3 open invoices, with no card required to start.

It is not a collections agency and cannot force a client to pay. If you have already reached a formal notice, handle that step yourself. For invoices sitting in someone else's queue, scheduled reminders are often the difference between a short delay and a 40-day one.