Client Concentration: The Risk That Lowers Your Price

There is a figure that comes up consistently in pest control business sales: 25 percent. When a single client represents more than a quarter of a business's revenue, buyers treat it as a material risk, and that risk is typically reflected in the price they offer. It does not matter how long you have worked with that client, how stable the relationship feels, or how well-structured the contract is. The concentration itself is the issue.

This is one of the more counterintuitive aspects of selling a service business. A large anchor client often feels like a strength from the inside. It provides revenue certainty, a reference site for other prospects, and a foundation the rest of the business has grown around. Buyers, however, see it differently. They are acquiring a business that, if it loses that one client, will be worth significantly less than what they paid for it.

Why buyers discount for concentration

The logic is straightforward. When a buyer acquires a business, they are paying a multiple of earnings based on an expectation that those earnings will continue. The higher the multiple, the more confident they need to be in that continuity. A business where 30 or 40 percent of revenue comes from one client introduces a scenario in which the acquisition thesis can fail entirely through no fault of the acquirer.

Even when that client relationship appears stable, buyers will ask several uncomfortable questions during due diligence. Is the relationship with the current owner personally? What happens if the client's own business changes direction or is acquired? Has the contract been tested against other providers recently, or is it renewed routinely by inertia? Are there any changes in that client's sector, such as a consolidation of their own purchasing, that could affect the arrangement?

In our experience, the answers to these questions rarely eliminate the concern entirely. The best that can usually be achieved is a discount that reflects the risk, rather than a more severe reduction in the multiple applied to the whole business.

The typical buyer response to high concentration

When concentration risk is identified during a transaction, buyers have several ways of responding. The most common are:

• A reduced headline multiple. Instead of applying the multiple their model would normally generate for a business of this type, they apply a lower multiple to account for the risk.
• Deferred consideration linked to client retention. A portion of the purchase price is held back and paid only if the concentrated client stays with the business for one to two years post-acquisition. This shifts the risk of client loss to the seller.
• Representations and warranties. Legal protections that oblige the seller to indemnify the buyer if the concentrated client leaves within a defined period following completion.

None of these outcomes are necessarily deal-breakers, but all of them result in either a lower price or a more complicated deal structure. The simplest way to avoid them is to address the concentration before going to market.

Practical steps to diversify before a sale

Diversifying a concentrated client base does not require rapid growth or dramatic strategic changes. In most cases, the goal is to bring the dominant client below 20 to 25 percent of revenue, which changes the buyer's risk assessment meaningfully.

The most effective approach is usually a combination of targeted commercial contract development in the period before going to market, and a deliberate focus on sectors where your credentials are strong. If you hold BPCA membership and you have demonstrated capability in food manufacturing or hospitality, those sectors offer the most direct route to adding contracted commercial revenue that can offset the relative weight of the dominant client.

It is also worth considering whether the dominant client relationship could be strengthened contractually before the sale. A longer notice period, a formal multi-year agreement, or any other structural protection that makes the risk of sudden departure less likely will be viewed positively during due diligence, even if the concentration itself remains above the threshold.

A timing point worth considering

If you are aware that your largest client is likely to go out to tender or review their supplier relationships in the next year or two, that timing interacts significantly with your sale planning. Going to market before that review, with a clean contract in place, is preferable to going to market during a period of uncertainty. Talk to us before that clock starts running.