📖 Longer guide — approx. 10 min read
You did the work. You delivered. You invoiced. And then — nothing.
Unpaid invoices are one of the most common and damaging problems facing UK businesses. The money was earned. It was expected. In many cases it has already been committed to wages, suppliers, or overheads. And yet it is sitting unpaid in someone else's account while you chase, wait, and chase again.
This guide covers every practical option for recovering an unpaid invoice in the UK — from the first letter to a binding resolution — in plain English, without jargon.
At any given time, UK businesses are collectively owed around £26 billion in overdue payments. More than 1.5 million businesses are affected every year, with the average affected business waiting on approximately £17,000 in unpaid invoices. Late payments are linked to an estimated 14,000 business closures annually — 38 every single day.
The average affected business spends 86 hours a year chasing overdue payments. That is more than two full working weeks, consumed not by growth or client work but by recovering money that is already owed. You are not alone in this situation. And there are practical routes out of it.
Before choosing a recovery route, it is important to understand what you are actually dealing with. There are two fundamentally different situations:
The invoice is simply unpaid. The other side has not disputed it — they have just not paid. This may be deliberate, a cash flow problem, or administrative failure on their part. The recovery route here is relatively straightforward.
The invoice is disputed. The other side is actively contesting the invoice — the work done, the amount charged, the contract terms, or whether the payment obligation has been triggered at all. This is a different situation and needs a different approach.
The distinction matters for two reasons. First, the right recovery route is different in each case. Second, statutory interest and fixed compensation under the Late Payment of Commercial Debts (Interest) Act 1998 are generally not claimable on invoices that are genuinely disputed. Knowing which situation you are in shapes everything that follows.
Many businesses focus only on the original invoice amount when chasing an overdue payment. Under UK law, you are entitled to more than that.
Under the Late Payment of Commercial Debts (Interest) Act 1998, you can add statutory interest to overdue commercial invoices at 8% above the Bank of England base rate. This accrues automatically from the date the payment became late — no court order required.
You can also claim fixed compensation per invoice:
| Debt size | Fixed compensation |
|---|---|
| Under £1,000 | £40 |
| £1,000 to £9,999 | £70 |
| £10,000 or more | £100 |
These amounts are added on top of the original invoice — per invoice, automatically, without a court order. Include them in your letter before action and any subsequent recovery process. For full detail on how to calculate and claim, see our statutory interest and compensation guide.
If chasing has produced no result, the next step is a formal letter before action — sometimes called an LBA or letter before claim.
This is not the same as a final demand. A final demand is a strong payment request. A letter before action is a formal legal step that puts the debtor on notice that you intend to take formal proceedings — through a neutral decision process or through the courts — if they do not pay within a specified period.
A letter before action should include:
Courts in England and Wales expect to see a letter before action before a claim is issued. Sending one properly — and keeping evidence of delivery — puts you in the strongest possible position for whatever comes next. See our full letter before action guide for exactly what to include and how to send it.
For overdue invoice recovery where the invoice is disputed — or where you want a faster, more private, and more proportionate route than court — a private neutral decision process is worth serious consideration.
Both parties agree to appoint an independent neutral: a legally trained professional with substantial commercial experience. The neutral reviews the contract, the documents, and the written submissions from both sides. There is no hearing. Neither party needs a solicitor. A binding decision is issued within 10 business days.
At Dispute Neutral, fees are fixed and published, starting from £600 plus VAT. The process is entirely private. It covers commercial debts under £150,000 in England, Wales, and Northern Ireland.
This is particularly well suited to disputed invoices, debts above £10,000, situations where speed or privacy matters, and — importantly — the party on the receiving end of a claim who wants to avoid solicitor costs and adverse costs orders.
For more on the comparison with court, see our court costs versus Dispute Neutral comparison.
For undisputed invoices up to £10,000 where the other side will not engage with any other process, the small claims track is accessible without legal representation.
The limitations are significant: 9 to 18 months from issue to hearing, upfront court fees, and enforcement is a separate step. For debts above £10,000, the small claims track is not available and costs escalate sharply for both sides. See our alternative to small claims court guide for the full comparison.
For straightforward undisputed invoices where the debtor simply needs persistent pressure, a debt collection agency may be effective — working on commission of typically 10% to 25%. They have no power to resolve a genuine dispute, and their commission reduces your net recovery.
For most invoices under £150,000, debt recovery without solicitors is more proportionate. Legal costs represent a significant proportion of the amount being recovered, a large part of those costs are irrecoverable even if you win, and the process runs from 12 months to five years or more.
Both parties need to agree to use a private neutral decision process. If the other side refuses, court remains an option. However, three points are worth noting.
First, many businesses that resist court proceedings will engage with a private, fixed-fee process when the alternative is a public claim with its own costs risks. Second, since October 2024, courts in England and Wales can impose costs sanctions on parties that unreasonably refuse to engage in ADR. Third, businesses that include a Dispute Neutral clause in their standard terms ensure the process is already agreed before any dispute arises — draft clauses are available in the Include us section.
A letter before action sometimes produces payment within days. A private neutral decision process produces a binding outcome within 10 business days of the matter being ready. Small claims court takes 9 to 18 months from issue to hearing. Solicitor-led litigation for larger debts commonly runs from 12 months to five years or more.
Yes — and for most commercial debts under £150,000 you should seriously consider whether court is the right route at all. See our full guide on recovering unpaid invoices without going to court.
A disputed invoice needs a process that can actually resolve the disagreement — not just chase payment. A private neutral decision process is specifically designed for this situation. Statutory interest and fixed compensation are generally not claimable on genuinely disputed invoices, which is another reason to resolve the underlying dispute directly.
Not necessarily. See our guide on debt recovery without solicitors for the full detail.
A final demand is a payment request — the last in a series of chasing letters. A letter before action is a formal legal step that puts the debtor on notice that formal proceedings will follow. Courts expect to see one before a claim is issued.
Yes. Under the Late Payment of Commercial Debts (Interest) Act 1998, you can claim statutory interest at 8% above the Bank of England base rate — automatically, without a court order — plus fixed compensation of £40, £70, or £100 depending on the debt size.
If you have an overdue invoice and want a faster, more proportionate route to a binding outcome — without court, without solicitors, and without the wait — Dispute Neutral is designed for exactly this situation.
Start a matter →Private • Fixed-fee • Binding decision in 10 business days