Unpaid invoice procedure in the UK: a practical guide for England & Wales

If someone hasn’t paid an invoice, the most effective immediate approach is methodical: check your contract and invoice terms, send measured reminders and a clear letter before action, then escalate to a court claim (Money Claim Online) or — if the debtor is a company and the situation fits — a statutory demand. These steps preserve your position and keep options open for interest, costs and enforcement if you need a judgment.

The rest of this article explains when to use each route, the paperwork and evidence that matter, realistic timing and costs, and the risks of insolvency measures. It focuses on England & Wales procedures and links to the official guidance you will need.

Start by checking the paperwork and making contact

Before any formal step, confirm the basics: the invoice amount, the due date, what the contract says about payment terms, interest and dispute resolution. That record will determine whether you can claim contractual interest or recovery costs later. If the debtor is confused or genuinely delayed, a short email or phone call can sometimes fix matters faster than legal steps.

If informal contact fails, move to written reminders. Keep copies of every message, the dates you sent them and any replies — courts treat a clear paper trail as evidence you attempted to resolve the dispute before issuing a claim. GOV.UK lays out options for creditors and emphasises attempting resolution before court action: see the government guidance on your options if you're owed money (Options if you're owed money).

Send a letter before action: what to include and why it helps

A formal letter before action (sometimes called a statutory letter before claim in practice) sets a final deadline for payment and explains next steps if the debtor does not pay. It should: state the amount due, quote relevant invoice numbers and contract terms, summarise attempts to resolve the matter, and give a clear date by which you expect payment.

A well-drafted letter before action improves the chance of payment, helps preserve evidence of pre-action conduct (often required by court practice) and makes your later claim look proportionate. For many straightforward disputes, this letter precedes a Money Claim Online (MCOL) application. The government explains that claimants should try to resolve matters before issuing a claim: see guidance on making a court claim for money (Make a court claim for money: overview).

Money Claim Online (MCOL): when to use the county court route

If the amount is undisputed and the debtor still won’t pay, MCOL is the standard route for monetary claims in the county court. It is designed for straightforward money claims against people or businesses in England & Wales. Use MCOL when liability is clear or where you have documentary evidence proving the debt (invoices, delivery records, correspondence).

When you issue a claim, the defendant can admit and pay, admit and propose a payment plan, or defend. If they do not respond, you can request a County Court Judgment (CCJ) and then move to enforcement. The official Money Claims guidance explains how to start a claim and what happens after you do: Money Claim Online user guide and the claims service entry point (Respond to a money claim).

Practical points:

• You can usually ask for interest and a contribution to costs, but entitlement depends on contract terms and statutory rules. Record the contract clause or statutory basis for interest early.
• Court fees apply. For low-value claims the MCOL process is cost-effective; for higher-value or complex disputes, a solicitor may be advisable.
• A judgment is not recovery — it gives you enforcement powers but success depends on the debtor’s assets.

Statutory demands and insolvency: a serious step for companies only

If the debtor is a company and informal steps fail, a statutory demand is a formal insolvency tool. A correctly framed statutory demand requires the company to pay or apply to set it aside within 21 days; failure can allow you to present a winding-up petition. Because the Insolvency Rules dictate precise form and content and the remedies are severe, get specialist advice before using this route. See the government explanation of statutory demands and the relevant Insolvency Rules: When you can make a statutory demand and the Insolvency (England and Wales) Rules 2016 (Insolvency Rules).

Do not use a statutory demand if the debt is genuinely disputed or if your facts are uncertain — a wrongly used demand can be challenged and may expose you to costs or allegations of improper pressure.

Enforcement after judgment: realistic expectations

If you obtain a CCJ, the usual enforcement options include instructing enforcement agents (bailiffs), applying for attachment of earnings, seeking a charging order over property, or a third-party debt order (to freeze funds held by a bank). Citizens Advice provides a practical overview of what creditors can do and how defendants might respond: If you're being taken to court for debt.

Remember: enforcement costs money and may not produce recovery if the debtor has no recoverable assets. Consider the size of the debt, the debtor’s likely asset position and whether a negotiated payment plan might be quicker and cheaper.

When the debtor disputes the invoice or you face cross-jurisdiction issues

If the debtor raises a genuine dispute about quality, delivery, or scope, pause and gather evidence — contracts, delivery notes, emails, timesheets or photos that prove performance or show the dispute’s nature. Courts assess whether the debt is genuinely disputed; pursuing insolvency or heavy-handed enforcement against a disputed debt risks challenge and costs.

If the debtor is in Scotland or Northern Ireland, the procedures and forms differ (for example, Scotland uses Simple Procedure for lower-value claims). Seek jurisdiction-specific guidance before you act; the government’s options page flags these variations: Options if you're owed money.

Practical example

Suppose you are a small supplier owed £4,200 for delivered goods: you checked the contract, sent two polite reminders and got no reply. Send a letter before action giving 14 days to pay and warning that you will issue a county court claim if unpaid. If that fails, issue a claim through MCOL, seeking the principal, contractual interest (if your terms permit) and recovery costs. Keep in mind court fees and weigh whether the debtor’s bank details or assets suggest enforcement will be productive.

When to get specialist help and where to find reliable forms

Get a solicitor or insolvency practitioner when the debt is large, the debtor might be insolvent, or you contemplate a statutory demand or winding-up petition. For straightforward claims use the official MCOL guidance (Money Claim Online user guide).

If you want a professionally prepared demand letter produced from your information, a commercial service can speed the process; for example, prepares documents from customer-provided details (they do not provide legal advice or court representation).

Takeaway: start with the contract and clear written communications, preserve evidence, use a letter before action, then escalate to MCOL or (for companies only and with advice) a statutory demand. Each escalation brings costs, time and risks: choose the route that fits the debt’s size, the clarity of the evidence and the debtor’s likely ability to pay.

For help preparing a professional demand letter, BeforeSuit can help you prepare your next steps.