Low risk is not a lending limit

Every credit decision asks three questions. Most tools only answer one—and we keep letting them answer all three.

Think about the account that went wrong. Not the one that failed a check — the one that sailed through it. The report came back low risk. Clean score, green light. You gave the customer the limit they asked for. And it still became the write-off you spent the next quarter explaining to management.

Here is the uncomfortable part: the score did its job. It told you the business was unlikely to fail, and it was probably right — most low-risk customers don’t fail. You just asked it a question it was never built to answer. You wanted to know how much to extend. It only ever told you how likely they were to survive. Those are not the same question, and the gap between them is where a surprising amount of bad debt lives.

Three questions every credit decision asks

Strip a credit decision back, and it is never really a yes or a no. It is three separate questions, and you answer all three whether you mean to or not:

1. Will they survive? This is risk — the probability that the business will fail within a given time window.
2. How much can they support? This is capacity — what the company’s own finances can actually service.
3. How much are we willing to risk? This is appetite — how much of our own exposure we’re prepared to put on this single name.

Capacity is not risk, and appetite is neither. A credit score answers the first question well. It says almost nothing about the second, and nothing at all about the third — because it cannot see your book, your concentration, or how much of your money is already riding on customers like this one. Three questions; one answer; and we routinely let that one answer stand in for all three.

Using a risk answer to solve a capacity problem

This is the actual mistake, and it is worth naming plainly. When a report says low risk, and we extend the requested limit, we use the answer to question one to settle questions two and three. We treat “unlikely to fail” as if it also meant “can comfortably carry this much” and “sensible for us to take on.” It means neither.

Three quick cases show how fast that breaks down. A small, stable, profitable joinery firm is genuinely low risk — and has almost no capacity to absorb a large line; stable does not mean big. A larger plant-hire business with some seasonal swing might score only moderate, yet have the balance sheet, debtor book and liquidity to support a real facility. And a sound wholesaler becomes dangerous the moment the limit you extend makes you a major share of its liabilities, or you find its own revenue leans on one or two customers. In every case, the survival score and the right limit point go in different directions. The score was never wrong. It was just answering a different question.

What the other two questions actually need

Question two — capacity — is about the financials, not the survival odds: balance-sheet strength, working capital and liquidity, the debtor book, gearing, concentration, and revenue stability. None of it is exotic, and none of it is captured by a single grade. Question three — appetite — isn’t about the customer at all. It is about you: how large this exposure is relative to your book, how correlated it is with everything else you’re carrying, and how much you can afford to lose if question one’s small probability is the one that lands. The same customer justifies different limits for two suppliers because the third question has different answers for each.

One honest caveat. Capacity and appetite don’t resolve to a single exact figure, and anyone who hands you one to two decimal places is overstating what the data can do. The real output is a defensible range. The value isn’t a perfect number — it’s asking the right question at all, instead of reading a risk grade as if it were a lending limit.

The question we’ve been skipping

So the next time a report comes back low risk, notice the relief it gives you — and then notice what it hasn’t told you. Low risk of what, exactly? How much can they actually carry? And how much of that are we willing to put on one name? A score answers one of the three questions a credit decision asks. For years, we’ve let it quietly answer all three, only to wonder why low-risk customers keep incurring losses. They weren’t the wrong customers. We were answering the wrong question.

Sources

• Conceptual piece — no figures asserted beyond market context. Market framing (business credit reports present a risk rating and a suggested credit limit together) reflects standard incumbent report structure; not attributed to any single named provider.
• Lending-growth context: UK Finance — SME lending Q1 2026 (£5.3bn, +16%), illustrating why sizing decisions matter as facilities grow. ukfinance.org.uk