Owners often hear that concentration is automatically bad. The more useful question is why the relationship is large, how durable it is, and what the company is doing to create a broader base over time.
Understand the concentration
Separate contracted revenue, repeat behavior, one-time projects, and pass-through work. Review relationship tenure, decision makers, switching costs, service performance, and the customer’s own stability. A twenty percent customer with ten years of embedded service is different from a twenty percent customer won through one recent bid.
Protect before diversifying
Do not neglect the important relationship while chasing new logos. Build multiple connections across the account, document service commitments, measure customer health, and identify opportunities to become more useful.
If one owner holds the entire customer relationship, the first resilience move is to build institutional coverage.
Find the repeatable reason you won
The best diversification plan begins with pattern recognition. What problem did the major customer hire the company to solve? Which capabilities are transferable to similar buyers? A focused lookalike strategy is usually stronger than broad, unfocused prospecting.
Build a measured commercial engine
Define target accounts, assign ownership, track useful activity, and improve the sales cycle one constraint at a time. Avoid compensating for concentration with low-quality revenue that strains delivery or weakens margins.
Show the trajectory
Concentration may remain visible for years. What matters is a credible plan supported by new customer wins, strong retention, distributed relationships, and growing capability. Evidence of progress can change how employees, lenders, and potential partners understand the risk.