What is customer concentration risk and how does it affect valuation?
Short Answer
Customer concentration risk is the risk that loss of a major customer would materially harm the business — high concentration justifies lower valuations or discount rates.
Full Explanation
If your top customer represents 30% of revenue and that customer has a one-year contract with 90-day termination rights, you have material concentration risk. In MPEEM valuation, high concentration requires adjustments: either reduced customer relationship value (because the relationship is less stable), higher discount rate (to reflect risk), or shorter useful life (assuming the customer may leave soon). Auditors and investors heavily scrutinise customer concentration: if top customer loss would threaten viability, the company is higher-risk. Many PE firms require customer contracts to be extended and derisked before acquisition. For your own internal management, understand which customers represent material risk and develop mitigation strategies: product lock-in, multi-year contracts, land-and-expand (growing wallet share), and relationship diversification. For valuation purposes, quantifying concentration risk is important: does your top customer represent 10% (low risk), 30% (material risk), or 50% (severe risk)? Different industries have different expectations — consulting firms typically have higher concentration; SaaS with self-serve models have lower concentration. For investment negotiations, transparency on customer concentration builds credibility.
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