What to do when a client stops responding to invoices

It’s one of the most stressful situations a business owner can face. You’ve done the work, you’ve sent the invoice, you’ve followed up with polite email reminders, and maybe you've even made a few phone calls. Then, suddenly, silence. Your emails go unanswered, your calls go to voicemail. The client has gone dark, and your cash flow is taking the hit. This isn't just an overdue invoice anymore; it's a communication breakdown that requires a more structured and serious approach.

This guide provides a step-by-step escalation plan for UK businesses dealing with a non-responsive client. We'll move beyond simple reminders and into the formal, professional steps you can take to recover the money you are owed, all while complying with UK law and maintaining your professionalism.

Before You Escalate: The Pre-Flight Check

Before you press the big red button, it's vital to ensure your own house is in order. Rushing into legal threats without a solid foundation can weaken your position and waste your time. Take a moment to run through this checklist.

1. Confirm the Basics Are Correct

It sounds simple, but errors are a common reason for apparent non-payment. A client may be ignoring an invoice they believe is incorrect rather than proactively querying it. Double-check:

• The Contact: Are you certain you've been emailing the right person or department? Staff change roles, people leave, and an invoice sent to a former project manager might be sitting in a dead inbox.
• The Invoice Details: Is the invoice number correct and unique? Is the amount owed clear and does it match what was agreed? Is your VAT number (if applicable) present and correct?
• The Purchase Order (PO) Number: If your client uses a PO system, an invoice without the correct PO number will almost certainly be rejected by their accounts payable department. It won't even enter their payment queue.

2. Document Everything

If you end up in a formal dispute, your records are your most powerful asset. Create a simple log or timeline of your collection efforts. For each invoice, record:

• The date the invoice was sent.
• The date and time of every follow-up email.
• The date and time of every phone call, who you spoke to, and a brief note of what was said (e.g., "Spoke to Jane in accounts, she confirmed they have the invoice and will process it").
• Any delivery or read receipts from your emails.

This chronological record demonstrates that you have acted reasonably and given the client every opportunity to pay before escalating.

3. Review Your Contract and Terms

What did your client actually agree to? Your signed contract, proposal, or terms and conditions are the legal basis of the debt. Re-read the section on payment terms.

• What was the agreed payment window (e.g., 14, 30, 60 days)?
• Did your terms mention the right to charge interest on late payments?
• Is there a specific contact or address for billing disputes?

Having this information to hand will be crucial for the next stages.

Stage 1: The Final Digital Nudges

Even though they've gone quiet, it's worth making one or two final attempts to re-establish contact before moving to more formal methods. The goal here is to rule out any simple misunderstandings and create a final, clear digital trail.

The "Is There a Problem?" Email

Your previous emails were likely titled "Invoice [Number] Overdue". It's time to change tack. Send a new email with a different, less accusatory subject line, such as:

• "Query regarding Invoice [Number]"
• "Checking in on Invoice [Number]"

In the body of the email, keep it brief and non-emotional. You're shifting the focus from "you haven't paid" to "I'm concerned there might be an issue".

Example:

Subject: Query regarding Invoice [Number]

Hi [Client Name],

I'm just following up on the below invoice for £[Amount]. We haven't received payment yet and I wanted to check that you've received it and that everything is in order.

If there are any problems with the invoice or the work, please let me know as soon as possible so we can resolve them.

Otherwise, could you please provide an update on when we can expect payment?

Best regards,

[Your Name]

This approach gives the client an easy, non-confrontational way to re-engage if they've been avoiding you out of embarrassment or disorganisation.

Try a Different Contact Point

If your main contact remains silent, it's time to try and find an alternative. This isn't about being a nuisance; it's about finding the person whose job it is to pay the bills.

• Accounts Department: Look for a generic accounts@company.com or finance@company.com email address on their website. Forward your entire email chain to that address.
• A Director or Senior Manager: For smaller limited companies, you can find the directors' names for free on the Companies House register. A polite, professional email or LinkedIn message to a director can often get things moving. Frame it as a last resort, for example: "I've been unable to reach [Main Contact] in your accounts team..."

Many businesses use automated systems to manage the initial follow-up process, ensuring that polite, persistent reminders are sent on a schedule without manual effort. Tools like InvoiceReminder connect directly to accounting software like Xero, QuickBooks, FreeAgent, and Sage to automate these early-stage emails. This frees you up to focus your manual efforts on the truly problematic accounts that have reached this stage of non-communication.

Stage 2: The Formal Letter Before Action

If your digital nudges are met with continued silence, it's time to move the conversation offline and into a more formal, legally significant format. The next step is to send a "Letter Before Action" (LBA).

An LBA is a formal letter that informs the debtor you intend to take legal action (such as starting a court claim) if the debt is not paid by a specific deadline. It is a required step in the pre-action protocol for debt claims in the UK and shows a court that you have made a serious, final attempt to resolve the matter before resorting to litigation.

Why a Physical Letter Works

In a world of overflowing inboxes, a physical letter sent by post has weight.

• It cannot be ignored: It lands on a desk and has to be physically handled.
• It demonstrates seriousness: It signals a shift from routine reminders to a formal dispute process.
• It creates a legal paper trail: Sending the letter via a tracked service like Royal Mail Signed For provides proof of delivery.

What Your Letter Before Action Must Include

This is not the time for ambiguity. Your LBA should be clear, concise, and contain all the necessary information.

1. Clear Heading: Label the letter clearly at the top: "Letter Before Action".
2. Your Details: Your full business name and address.
3. Their Details: The client's full legal trading name and registered address.
4. Date: The date the letter is being sent.
5. Reference: State the invoice number(s) in question.
6. The Amount Owed: Clearly state the original invoice total.
7. Reference to the Law: For B2B debts, you should state that you are exercising your rights under the Late Payment of Commercial Debts (Interest) Act 1998.
8. Calculation of Interest and Compensation: Under this Act, you are entitled to add statutory interest and a fixed compensation sum to the debt.
   • Statutory Interest: This is calculated at 8% plus the Bank of England's base rate. You should state the daily rate of interest being added. (Note: The base rate can change, so always check the current rate. You can describe it as "calculated at the statutory rate of 8% plus the current Bank of England base rate").
   • Fixed Compensation: This is a one-off charge per invoice, depending on the size of the debt.

Debt Amount (per invoice)	Compensation You Can Claim
Up to £999.99	£40
£1,000 to £9,999.99	£70
£10,000 or more	£100

9. Total Amount Now Due: Add the original invoice amount, the accrued interest, and the fixed compensation to give a new, total figure.
10. A Firm Deadline: State that you require payment of the full amount within a reasonable period, typically 7 or 14 days from the date of the letter.
11. The Consequence: Clearly state what will happen if the deadline is missed. For example: "If we do not receive payment of the full amount of £[Total] by [Date], we will commence legal proceedings to recover the debt without further notice. This may result in you having to pay additional court fees and legal costs."
12. Method of Payment: Remind them how they can pay (e.g., your bank details).

Send this letter via Royal Mail Signed For or a similar tracked service and keep the receipt and tracking number with your other records.

Stage 3: The Crossroads - Debt Collection Agency or Small Claims Court?

If your Letter Before Action is ignored and the deadline passes, you have a decision to make. You have two primary routes for escalating the recovery of an undisputed debt in the UK: using a debt collection agency or initiating a court claim yourself.

Feature	Debt Collection Agency (DCA)	Small Claims Court (via MCOL)
Cost	Typically a percentage of the recovered debt (e.g., 10-20%). Often "no-win, no-fee" for the service, but the commission is non-refundable.	An upfront court fee based on the claim amount. This fee is added to the debt and recoverable from the client if you win.
Time & Effort	Low. You hand over the file and they handle the communication.	Medium. You must complete the online forms, manage the process, and potentially attend a hearing.
Control	Low. You delegate the process to a third party.	High. You are in full control of the claim and all communication.
Relationship	Can be very damaging to any remaining client relationship.	Also damaging, but the process is more formal and less aggressive than some DCA tactics.
Outcome	They chase payment. If they fail, they may recommend you proceed to court anyway.	A County Court Judgment (CCJ) is issued against the debtor if you win. This is legally binding.

Using a Debt Collection Agency

A reputable DCA acts as a professional third party to recover the debt on your behalf. They are experts in collection and can often get results simply because a letter from them carries more threat than one from you.

• Pros: It saves you a significant amount of time and stress. They know the legal boundaries and can operate efficiently.
• Cons: It will cost you a percentage of the money recovered. You also cede control over the tone and approach, and using an overly aggressive agency could harm your brand's reputation.

Using the Small Claims Court

For debts up to £10,000 in England and Wales, you can use the government's simple online process, known as Money Claim Online (MCOL). This is the 'small claims track' of the County Court, designed for use by individuals and businesses without needing a solicitor.

• Pros: If you are successful, you can recover the full debt, plus your statutory interest, plus the court fee you paid. A County Court Judgment (CCJ) against the company is a serious black mark on their credit file, providing a powerful incentive for them to pay.
• Cons: It requires you to manage the process, pay an upfront fee, and there's no guarantee of success. Furthermore, even if you win and get a CCJ, you may still need to take further 'enforcement' action (like instructing bailiffs) to actually get the money, which involves more time and fees.

For most small businesses with undisputed invoices, starting a claim via MCOL is often the most cost-effective and powerful next step after an LBA has failed.

The "Nuclear Option": A Statutory Demand

There is one further tool available, but it should be used with extreme caution and ideally with legal advice. A Statutory Demand is not a debt collection tool; it is a formal step in the insolvency process.

• What it is: A formal demand for an undisputed debt of £750 or more (for a company).
• The threat: If the company does not pay the debt or formally dispute it within 21 days, you can then petition a court to have the company wound up (forced into compulsory liquidation).
• The risk: This is an extremely aggressive step. If the debtor can show there is a genuine dispute over the invoice, they can apply to have the demand set aside, and you could be ordered to pay their legal costs. Never use a Statutory Demand for a debt that is or could be genuinely disputed.

This option is typically reserved for clear-cut cases where a solvent company is simply refusing to pay a significant, undisputed debt.

How to Protect Yourself in the Future

Dealing with a non-paying client is a painful lesson. Use that lesson to strengthen your processes and minimise the risk of it happening again.

• Robust Onboarding: For new clients, run a basic credit check or, at the very least, check their details on Companies House.
• Clear Contracts: Ensure your payment terms, late payment interest clauses, and project scope are crystal clear and signed before you start work.
• Upfront Payments: For larger projects, ask for a deposit or use milestone payments to ensure you're never too exposed.
• Consistent Chasing: Be prompt with your invoicing and consistent with your reminders. The faster you chase, the more seriously clients will take your payment terms.

Frequently asked questions

How long should I wait before sending a Letter Before Action?

There is no fixed rule, but you should act decisively. If an invoice is 30 days overdue and the client has ignored two or three email reminders and a phone call over a two-week period, that is a reasonable point to escalate to a Letter Before Action. Don't let debts drift for months, as it signals to the client that you aren't serious about collection.

Can I legally charge interest on any overdue invoice in the UK?

For business-to-business (B2B) transactions, yes. The Late Payment of Commercial Debts (Interest) Act 1998 gives you a statutory right to claim interest (8% plus the Bank of England base rate) and fixed compensation, even if it wasn't in your original contract. For business-to-consumer (B2C) debts, you can only charge interest if it was a clear term in the contract they agreed to.

What's the difference between a Letter Before Action and a Statutory Demand?

A Letter Before Action is a formal warning that you intend to start a court claim to recover a debt. It's part of the pre-action protocol for the civil courts. A Statutory Demand is a formal warning that you intend to start insolvency proceedings (i.e., attempt to wind up the company). It is a far more aggressive tool and should only be used for undisputed debts.

Is it worth chasing a small debt of a few hundred pounds?

This is a commercial decision. The court fee for a claim up to £300 is currently £35. You must weigh this cost and your time against the amount owed. For many small businesses, pursuing the claim on principle and to deter future late payment is worthwhile. The MCOL system makes it viable to chase smaller sums without incurring expensive legal fees.

My client claims the work was poor, which is why they haven't paid. What now?

This is now a disputed debt, not a simple non-payment. You cannot use a Statutory Demand. Your first step should be to engage with their specific complaints in writing and try to resolve the dispute. If you cannot agree, your path would be through negotiation, mediation, or ultimately the Small Claims Court, where a judge would have to decide the merits of the dispute. Meticulous records of the project are essential here.

Can I just "name and shame" a non-paying client on social media?

It is strongly advised that you do not do this. Publicly naming a company or individual for non-payment can easily cross the line into defamation or libel, for which you could be sued. It is unprofessional and carries significant legal risk. Stick to the formal, private channels outlined in this guide.

Stop Chasing, Start Automating

The manual process of chasing invoices, logging calls, and sending follow-ups is a significant drain on the time and energy of any small business owner. The initial stages of this process, from sending the invoice to the first few polite reminders, can and should be automated.

InvoiceReminder helps UK small businesses, freelancers, and accountants automate their invoice chasing. By connecting to your existing accounting software like Xero, FreeAgent, Sage, or QuickBooks, it sends scheduled email reminders based on rules you control. This ensures every invoice is followed up on time, without manual effort, improving your cash flow and freeing you to focus on running your business. The core email reminder system is currently available at no cost on the InvoiceReminder Free plan. This approach handles the routine chasing, so you only need to step in manually when a client, as we've discussed, truly goes silent.