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Client Concentration Risk measures how much of your total revenue depends on a small number of large clients, rather than being spread broadly across your client base.
How It’s Calculated
PetBizApp calculates what percentage of total revenue comes from your top few clients (typically your top 5 or top 10), flagging elevated concentration when a small group represents an outsized share of overall revenue.
What’s a Good Benchmark
Your top 5 clients contributing less than 15-20% of total revenue is a healthy, low-risk spread. If your top 5 clients represent 40% or more of revenue, losing even one or two of them would meaningfully damage the business, which is exactly the kind of fragility both buyers and lenders view as a serious red flag.
Why It Matters
A business that looks strong on total revenue can be quietly fragile if that revenue depends heavily on a handful of relationships. Losing one major client at a broadly-diversified business is a manageable setback; losing one major client at a highly concentrated business can be an existential event, and buyers price that risk directly into any valuation offer.
This KPI lives on the MULTIPLY (paid), Score / Improve dashboard inside PetBizApp.
A Worked Example
A boarding business generates strong, growing revenue, but a review of Client Concentration Risk reveals that a single large corporate account — a company boarding employee pets as a workplace benefit — represents 35% of total revenue. When that company undergoes a leadership change and cancels the benefit program with 60 days notice, the business loses over a third of its revenue almost overnight, forcing rapid, painful cost cuts. In the aftermath, the business makes a deliberate decision to cap any single client relationship at a defined percentage of revenue going forward, actively diversifying its client base rather than allowing a similar concentration to build up again.
How This Looks Different By Business Model
For a business serving primarily individual consumer clients, high concentration is less common structurally, but it’s still worth checking periodically, especially for a business with a small handful of unusually loyal, high-frequency clients. For a business with any significant corporate, institutional, or B2B accounts (workplace pet benefit programs, property management partnerships), concentration risk deserves much closer attention, since these relationships tend to be larger individually and more binary in their continuation (a single decision-maker change can end the entire relationship at once). For a business actively pursuing large institutional accounts as a growth strategy, weigh the revenue upside against the concentration risk it creates, and consider capping any single account’s share of total revenue as a deliberate policy.
What Causes This Number to Rise
Rising concentration usually comes from successfully landing one or more large accounts without a corresponding effort to keep growing the broader client base at the same time, or from losing smaller clients (through churn) while retaining and growing a large account, which shrinks the denominator even as the large account’s absolute size stays constant.
A Common Misconception
Owners sometimes view landing a large account as an unambiguous win without considering the concentration risk it introduces. A large account is genuinely valuable, but its value should be weighed against the increased fragility it creates if it comes to represent an outsized share of total revenue.
How to Reduce This Number
Set an internal policy capping any single client’s share of total revenue, and actively continue growing the broader client base even while a large account is performing well. Diversify service offerings and marketing efforts to avoid becoming overly dependent on any one channel or account type. And build a contingency plan for what would happen operationally and financially if a top client relationship ended unexpectedly.
Common Mistakes
Treating a large new account as an unambiguous win without considering concentration risk. Not tracking this metric at all until a concentration-driven crisis actually happens. And having no contingency plan for the loss of a major client relationship.
