Many established companies grew alongside a small number of large customers. Those relationships are often the reason the business exists in its current form: a major client that provided steady volumes, trusted the company with new challenges and helped it professionalise. Losing one of them would be painful. Depending heavily on them is a risk.
Customer concentration is one of the first things buyers, investors and lenders examine. It is also one of the most common reasons for cautious valuations or demanding deal terms. The goal is not to shrink large customers, but to grow the rest of the business and secure the key relationships.
Why concentration matters
- Revenue risk. The loss of a single customer could significantly reduce revenue and profit.
- Negotiating power. Large customers know their importance and may press on price and terms.
- Strategic dependence. The company's direction can be shaped by one customer's needs.
- Valuation impact. Buyers and investors apply risk discounts or demand protective structures.
Step 1: Measure it properly
Analyse revenue and gross profit by customer over several years. Look at:
- The share of the largest customer, the top three and the top ten
- How these shares have changed over time
- Margins on the largest customers compared with others
- Contract terms, duration and notice periods
- How many contacts you have within each large customer
A customer that represents a large share of revenue but a smaller share of profit is a different risk from one that drives most of your earnings.
Step 2: Strengthen the key relationships
Reducing risk starts with the customers you already have:
- Broaden contacts. Build relationships at several levels and functions, not just one buyer.
- Formalise agreements. Framework agreements or longer contracts can increase visibility.
- Increase integration. Become embedded in the customer's processes through services, systems or joint planning.
- Review account health regularly. Satisfaction, issues, upcoming changes in the customer's organisation.
- Avoid single points of contact on your side. Ensure more than one person in your company holds the relationship.
Step 3: Grow the rest of the base
Diversification usually comes from deliberate commercial work:
- Identify similar customers. If a large customer values you, others like them may too.
- Use the reference. Where permitted, experience with a major customer is a powerful credential.
- Develop new segments. Adjacent industries with similar needs.
- Expand geographically. If capacity and capability allow.
- Broaden the offer. Products or services that appeal to a wider range of customers.
This requires a functioning commercial engine. Without dedicated resources for new business, growth will continue to follow the largest customers.
Step 4: Manage the transition carefully
While diversifying, avoid signalling to large customers that they matter less. Continue to deliver excellent service. Ensure capacity planning does not lead to conflicts between new and existing customers.
Step 5: Present concentration honestly
If you plan a sale or capital raise, concentration will be examined. Present it openly, with context:
- The history and depth of key relationships
- Contract terms and renewal history
- The steps taken to diversify and their results
- Plans for further diversification
Buyers respond better to a clear, well-managed picture than to a risk they discover themselves.
Questions for the management team
- If our largest customer gave notice tomorrow, what would we do?
- How many people at each key customer know and value us?
- Which new customers could resemble our best existing ones?
- Who in our team is responsible for new business?
- How has concentration changed over the past three years, and why?
Common mistakes
- Waiting until a customer leaves to start diversifying
- Discounting to win new customers at the expense of margins
- Neglecting key accounts while chasing new ones
- Relying on the owner's relationship with the largest customer
Planning for the worst case
Even with careful work, a large customer may one day reduce volumes or leave. Prepare a contingency plan in advance: which costs could be adjusted, which other customers could absorb capacity, how the team would be informed and how cash would be protected. Having this plan does not make the event more likely, but it makes the company calmer and more resilient if it happens, and it demonstrates good management to lenders, investors and buyers.
How LXN works with owners
We help owners analyse concentration risk, strengthen key account management and build the commercial capacity to grow a broader customer base. Our hands-on work aims to make the business more resilient and more valuable, whether the next step is a transaction or long-term ownership.
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