Your credit control may be failing when overdue invoices are getting older instead of being...
What Slowing UK Service Activity Means for Unpaid Invoices and Debtor Days
The UK services sector recorded a modest contraction in May 2026. The S&P Global UK Services PMI Business Activity Index fell from 52.7 in April to 49.3, its first reading below 50 since April 2025.
A PMI below 50 means that more surveyed businesses reported falling activity than rising activity. It is an early economic indicator, not a direct measure of insolvencies, unpaid invoices or debtor days.
Services account for around 80% of UK GDP, so weakening demand matters to B2B suppliers. The May survey reported falling new orders, increased client risk aversion and deferred spending decisions. These conditions can place pressure on customers’ working capital and make slower payment more likely, although the effect will differ between sectors and clients.
Why debtor days deserve attention
Debtor days show how long a business takes, on average, to collect money from credit customers. One common calculation is:
Debtor days = trade receivables ÷ annual credit sales × 365
A rising figure may signal that invoices are being disputed, payment processes are failing or customers are experiencing financial pressure. It does not prove that every debtor is unable to pay, so review individual accounts as well as the overall average.
Government-backed research published in 2025 found that more than 1.5 million businesses, or 28% of UK businesses, are affected by late payments each year. It estimated that £26 billion is outstanding at any one time, averaging approximately £17,000 for each affected business.
| Indicator | Research finding |
|---|---|
| Businesses affected annually | More than 1.5 million |
| Share of businesses affected | 28% |
| Late payments outstanding at a given time | £26 billion |
| Average owed per affected business | £17,000 |
| Estimated closures linked to late payment | 14,000 a year |
Late payment was estimated to cost the UK economy almost £11 billion annually and contribute to 14,000 business closures each year. However, these figures should not be interpreted as a forecast that one weak PMI reading will automatically cause the same outcome.
Steps to protect your cash flow
Start with an accurate aged-debtors report. Separate invoices by due date, value, dispute status and customer risk. Contact customers before an invoice becomes seriously overdue and confirm that it was received, approved and scheduled for payment.
Where internal follow-up is inconsistent, outsourced credit control services can provide a structured and documented chasing process. For new or higher-value customers, business credit checking services can help you set suitable credit limits and payment terms, although a credit check cannot guarantee payment.
If reminders are ignored, a formal payment demand letter can set out the amount owed, contractual due date and deadline for response. Keep copies of the contract, purchase order, invoice, delivery evidence and correspondence.
If a debtor has moved or stopped responding, debtor tracing support may help establish current contact details.
Businesses can usually claim statutory late payment interest on qualifying B2B debts at 8 percentage points above the Bank of England base rate, unless the contract provides a different interest rate. Fixed compensation of £40, £70 or £100 may also be available, depending on the debt’s value.
Do not wait for every invoice to reach the same age before escalating it. A disputed £50,000 invoice may require faster attention than an undisputed £500 balance. The guide explaining when to escalate an invoice to debt collection services can help you assess communication history, financial warning signs and recovery options.
A commercial debt collection agency UK businesses instruct should explain its fees, recovery process and escalation options. Specialist commercial debt recovery services can begin before court proceedings and may help preserve a customer relationship through structured communication.
Where overdue invoices create a temporary funding gap, invoice finance services may release working capital against eligible receivables. Compare charges, recourse terms and customer-notification arrangements carefully. Wider company cashflow support may also help where the problem extends beyond a small number of debtors.
Ready to protect your cash flow?
One PMI reading should not trigger panic, but it is a sensible prompt to review overdue balances, customer concentration and credit-control procedures.
Visit tauruscollections.com or call 01332 565 350 to discuss your unpaid invoices.
Need Expert Debt Collection Advice?
If your business is dealing with overdue invoices or difficult debtors, speak to Taurus Collections for practical, professional support with commercial debt recovery.
Karl Baker
Karl Baker is the founder of Taurus Collections and his company has helped recover over £1.1 million worth of debt with an average recovery rate of 91.5%.