7 early warning signs your business is heading for financial trouble

In Q4 2025, companies in critical financial distress in the UK surged 43.8% year-on-year, reaching 67,369 affected businesses. Every sector showed double-digit increases. The common thread in most of these cases was not a single catastrophic event but an accumulation of smaller warning signs that were visible months before the crisis — and ignored, because business owners are optimists by nature and the signs were uncomfortable to confront.

These are the seven most reliable early warning indicators. If two or more apply to your business right now, the time to act is before they compound.

1. Your gross margin is deteriorating quarter on quarter

Gross margin is the first financial number to reflect competitive pressure, cost increases, or pricing problems. A 2% deterioration across two consecutive quarters in a business with £500,000 revenue represents £10,000 of lost contribution per year — already eroding the buffer between trading profitably and trading at a loss. Most business owners track revenue obsessively and look at margin only when the accountant presents the annual accounts. By then it is too late to course-correct without pain.

2. You regularly delay paying HMRC

HMRC is almost always the last creditor to be paid because the consequences are delayed (interest and penalties rather than immediate legal action). But paying HMRC late is one of the clearest indicators of a liquidity problem. It signals that the available cash is insufficient to meet all obligations. HMRC debt also has priority status in insolvency — HMRC became a preferential creditor again for PAYE and VAT from 2020. If you owe HMRC, that debt sits ahead of most unsecured creditors.

3. Your debtor days are increasing

Debtor days rising over three or more consecutive months means either your customers are taking longer to pay or your credit control is deteriorating. Both are problems. Rising debtor days reduce available cash and increase bad debt risk. They also mask revenue: you may be selling more but collecting less, which is not the same as growth. If your debtor days have increased by more than 10 days in the past 12 months without a deliberate extension of credit terms, investigate the underlying cause immediately.

4. You cannot tell your gross margin without looking it up

This is a management quality signal rather than a financial metric, but it correlates strongly with financial distress. Business owners who know their gross margin by heart, by product, and by customer segment have fundamentally different businesses from those who produce this figure once a year from statutory accounts. If the answer to “what is your gross margin?” is “I would need to check,” you are flying without instruments.

5. Your bank overdraft is permanently at its limit

An overdraft used occasionally to bridge timing differences is a legitimate tool. An overdraft permanently at its limit is a structural funding gap — the business needs more working capital than it has. This is manageable with the right financing, but ignoring it is not. If you are regularly hitting your overdraft limit, review whether the overdraft limit is appropriate, whether your debtor days could be reduced to release working capital, or whether longer-term financing (such as an invoice discounting facility) would better match your working capital cycle.

6. Your revenue is concentrated in one or two customers

Customer concentration above 20% in a single customer is a strategic risk that becomes a financial emergency if that customer reduces spend or fails. In 2026, with increasing numbers of UK businesses under financial pressure, the risk of a key customer failing or cutting spend is materially higher than it was in 2022. If 40% of your revenue comes from one customer and that customer reduces their orders by 50%, you have immediately lost 20% of total revenue — with your fixed cost base unchanged.

7. You are growing revenue but running out of cash

Counterintuitive but common. Growth consumes working capital. New stock must be purchased, new staff hired, new marketing funded — all before the new revenue arrives. A business growing at 30% per year with 45-day debtor days and 30-day supplier payment terms has a widening funding gap every month. This is solvable with appropriate growth financing, but it must be identified and funded proactively. Discovering the gap when payroll is due and the account is empty is significantly more expensive than planning for it 90 days earlier.