Reducing Customer Concentration Risk
When one customer owes you a large slice of your revenue, their problems quickly become your problems.
What you'll learn
- What customer concentration risk is
- Why it threatens otherwise healthy businesses
- How to measure your exposure
- Practical ways to reduce the risk
6 min read
What it is
Customer concentration risk is the danger that comes from depending on a small number of customers for a large share of your sales or your debtor ledger. If one of them pays late, disputes an invoice, or fails altogether, the impact is magnified because so much of your income rests on them. A business can be profitable on paper yet dangerously fragile if it is built on too few accounts.
Why it is dangerous
A single large customer becoming insolvent can turn a strong year into a crisis, because the loss is not just one invoice but a major portion of expected cash. Concentration also weakens your negotiating position — a dominant customer can push for longer terms or lower prices, knowing how much you depend on them. The risk is structural, not just a matter of any one debt.
Measuring exposure
Start by looking at what share of revenue and of your outstanding receivables your largest customers represent. If a handful account for most of either, you are concentrated. Reviewing this regularly turns a vague worry into a number you can manage. A quick way to see how a large overdue balance would hit you is to model it with a simple calculator.
Spreading the risk
Reduce concentration deliberately: pursue new customers to broaden your base, set sensible credit limits even on valued accounts, ask for deposits or milestone payments on large jobs, and consider credit insurance for major exposures. Tightening terms with a dominant customer feels awkward, but it is far less painful than absorbing their failure. Diversification is the most durable protection.
A note on advice
This is general information only, not legal, financial, or tax advice. The right risk strategy depends on your business, so seek advice tailored to your circumstances.
Key takeaways
- Concentration risk grows when few customers drive most of your sales.
- One large failure can turn a good year into a crisis.
- Measure the share of revenue and receivables your top customers hold.
- Diversify, set limits, take deposits, and consider insurance.
Frequently asked questions
How much concentration is too much?
There is no fixed rule, but the more revenue and receivables rest on a few customers, the more fragile you are. Review it regularly. General information only.
Should I drop a large customer to reduce risk?
Rarely necessary. More often you set sensible limits, take deposits, and broaden your customer base alongside them.
Does credit insurance help with concentration risk?
It can cushion a major exposure, subject to policy terms, but diversification remains the more durable protection.
Knowledge is good. Getting paid is better.
Merion's team recovers what you're owed — commission-only, no upfront fee.