CommercialValuation
Customer Concentration
Also known as: Revenue concentration, client dependency
When a disproportionate share of revenue comes from a small number of customers. Buyers treat it as a risk — if one relationship leaves, the revenue model breaks.
WHY IT MATTERS
Buyers measure customer concentration as a percentage: if your top customer is 30% of revenue, losing that customer means losing nearly a third of the business overnight. The threshold varies by industry, but most buyers start discounting the valuation when any single customer exceeds 15–20% of total revenue. The risk isn’t theoretical. Buyers have seen acquisitions where a key customer left within 12 months of close — sometimes because the relationship was with the founder personally, sometimes because a change-of-control clause gave them the right to walk. Customer concentration affects both the multiple and the deal structure. A concentrated revenue base often leads to earnout provisions tied to customer retention, larger escrow holdbacks, or outright price reductions. Diversifying your customer base takes years, which is why it’s one of the first things a serious exit preparation process addresses.