Your credit control may be failing when overdue invoices are getting older instead of being collected. Warning signs include days sales outstanding (DSO) rising beyond normal payment patterns, increasing balances over 60 or 90 days, repeat late payers, and missed promises to pay without follow-up. If several indicators persist, understanding how to improve credit control should become a cash flow priority rather than another administrative task.
Why Internal Credit Control Quietly Fails
Credit control rarely stops working overnight. Staff leave, other responsibilities take priority, important customers receive repeated extensions, or invoice volumes grow faster than the team. Chasing activity can look busy while cash receipts deteriorate, particularly when nobody reviews the age and value of unpaid balances.
Late payment is expensive across the economy. Government-commissioned London Economics research, published in July 2025, estimated that UK businesses spend 133 million staff hours annually pursuing late payments. Businesses reporting time spent chasing averaged 86 hours a year. For an overstretched finance team, that workload can displace both routine prevention and recovery.
Eight Warning Signs
| Warning sign | What to check | What it usually means |
|---|---|---|
| Debt over 60 or 90 days is rising | Aged debtors report | Overdue accounts are not being resolved |
| DSO exceeds expected payment patterns | DSO versus terms and prior periods | Cash is taking longer to arrive |
| The same customers repeatedly pay late | Repeat late payers list | Agreed terms lack consistent enforcement |
| Promises to pay are missed | Promise-kept rate | Commitments are not followed up |
| Disputes remain unresolved for weeks | Age of open disputes | Sales and finance teams are not coordinating |
| Chasing happens only when staff have time | Credit-control workload | Insufficient ownership or capacity |
| Cash receipts differ from forecasts | Forecast versus actual receipts | Customer behaviour is poorly understood |
| Bad-debt write-offs are increasing | Write-offs as a share of sales | Risks are identified too late |
Our guide to aged debtors reporting explains how to use the ageing analysis to prioritise action.
The Numbers That Tell You the Truth
You do not need an elaborate dashboard. Review a small set of measures monthly, comparing them with agreed terms, recent trends and the same period last year.
- DSO: Closing trade receivables divided by credit sales, multiplied by days in the period. If terms are 30 days but DSO reaches 52, investigate the gap rather than assuming every invoice is overdue.
- Share of debt over 60 and 90 days: The proportion of unpaid balances in older ageing bands.
- Promise to pay kept rate: The proportion of payment commitments honoured by the agreed date.
- Bad debt as a percentage of sales: A lagging indicator of collection losses and deteriorating customer quality.
Our guide to credit control KPIs that matter covers the calculations and interpretation in greater detail.
Why Age Matters So Much
A commercial-collections chart circulated by the Commercial Law League of America suggests recovery prospects fall from around 94% after 30 days to 74% after 90 days and 58% after six months. These figures are illustrative benchmarks, not verified UK-wide probabilities or forecasts for your invoices. Recovery depends on the debtor’s finances, disputes and available evidence. The practical lesson remains: consistently review old debts promptly, rather than leaving them to drift. Our article on the hidden costs of overdue invoices explains how delays affect working capital.
What Causes the Breakdown
Identify the underlying failure before investing in new software or adding more reminders.
- No agreed escalation points. Nobody knows when a reminder should become a telephone call, formal demand or referral.
- Terms are not enforced. Habitual late payers face no consistent action, allowing overdue balances to accumulate.
- Weak onboarding. Poor credit checks and unclear agreements create avoidable disputes. Our guide to onboarding new clients covers prevention.
- Chasing is nobody’s main job. Collections fall behind when competing tasks always come first.
- Limited visibility of customer risk. Financial circumstances change, making regular credit checking important.
How to Improve Credit Control
Start by making responsibilities, deadlines and escalation steps clear to everyone involved.
- Confirm terms in writing. GOV.UK guidance says agreed business-to-business payment periods are usually within 60 days; longer terms can be lawful if fair. Without an agreed date, payment normally becomes late 30 days after the invoice is received or goods or services supplied, whichever is later.
- Chase consistently. Send reminders before and shortly after the due date, then follow up by phone. Our B2B debt collection tips outline a practical approach.
- Use available remedies. Qualifying late commercial debts can attract statutory interest and fixed compensation, subject to contractual terms. Our guide to claiming statutory interest explains the calculation.
- Establish escalation triggers. Decide when to issue a formal demand, refer an undisputed debt externally, or seek advice about a statutory demand. Do not use insolvency procedures to pressure payment of genuinely disputed debts. See when to escalate an invoice.
- Resolve disputes promptly. Give someone responsibility for investigating complaints, correcting invoices and communicating outcomes.
- Monitor customer risk. Use Companies House checks and consider security beyond personal guarantees for substantial exposure.
- Automate routine reminders. Consistent workflows free staff for difficult accounts; see using technology to prevent late payment.
When to Bring in Outside Help
If overdue balances keep rising, customers ignore communications or staff cannot chase consistently, specialist assistance may be worthwhile. Outsourced credit control can provide reminders, calls and reporting without replacing every internal process. Where invoices require more formal action, Taurus Collections offers commercial debt recovery on a no-win, no-fee basis, subject to agreed terms.
Construction firms may need specialist help with retentions and payment chains, available through our construction debt collection service. For overseas invoices, consider international debt collection. Our articles on UK SME profits and late payments, rising financial distress and the Commercial Payments Bill provide wider context; the Bill’s proposals should not be mistaken for law already in force. VAT bad debt relief, explained in our guide, may offer tax relief on qualifying unpaid sales but does not recover the debt itself.
Frequently Asked Questions
How do I know if my credit control is working?
Compare DSO and actual receipt dates with payment terms, then review whether debts over 60 or 90 days are shrinking. Regularly broken payment promises, unresolved disputes and growing arrears indicate that the process needs attention.
What is a good DSO?
It depends on your sector, customer mix and agreed terms. Compare DSO with your own historical performance and payment patterns rather than applying one universal target. A sustained increase deserves investigation.
When should I outsource credit control?
Consider outsourcing when staff capacity prevents timely follow-up, older debt keeps accumulating or internal resources would be better used elsewhere. Clear reporting and agreed responsibilities help retain oversight.
When should I use a debt collection agency?
Consider a specialist agency when an invoice remains unpaid after reasonable reminders or the customer stops engaging. Acting before accounts become seriously overdue may protect recovery prospects, although each case differs.
Fix It Before It Costs You More
If ageing balances and payment delays show your process is slipping, address them before cash flow deteriorates. Speak to our team for a free, no-obligation discussion of your overdue ledger and practical options for recovering outstanding invoices.
