The phone rings and the number on screen is one you’ve been hoping for. A large corporate account. Consistent volume. The kind of contract that could move your revenue by 30 to 40 percent.
Your accountant sees the numbers and nods. Your wife notices something different at dinner. For the first time in a while, real growth feels possible.
The eighteen months that follow write a different story. One that only surfaces when a buyer runs due diligence. By then, the number you were expecting has already changed.
The Story the P&L Didn’t Tell
I was speaking with a Queensland wholesale distributor about their business and learned they had built something genuinely worth owning. A loyal base of small-to-medium operators who called on a first-name basis, paid inside 30 days, and forgave the occasional hiccup because the relationship was real. Over years, the business had developed procurement systems that let those clients run lean, just-in-time stock levels. The responsiveness was the product. It was why people stayed.
Then a corporate account came knocking.
Multi-year commitment. Volume that dwarfed anything they’d handled before. The contract was an opportunity too good to turn down. Or so it seemed.
What followed looked like growth from the outside. Revenue climbed. The P&L told a good story. Inside the business, the picture was different.
The corporate client negotiated hard on price. Their ordering was inconsistent, but they required seven-day delivery capability at all times. Payment terms were 60 days. My client had to borrow to bridge the gap between outgoings and incoming payments.
The small clients noticed the change. Calls took longer to return. Delivery windows that had always been tight started slipping. One by one, a handful of the loyal base quietly found alternatives. Not dramatically. Just the way good clients leave when they sense the relationship has shifted.
After twelve months the profit had declined despite the revenue growth. The margins on the corporate work were thin, the carrying costs were real, and the operational energy required to service one demanding account had hollowed out the responsiveness that everyone else depended on.
When the contract came up for renewal, the owner walked away. The rebuild started from there, a client acquisition strategy shaped around the actual size and capability of the business. Slower. The right shape.
What a Buyer Sees in Your Revenue Profile
Here is what a business broker sees when they look at a revenue profile where one client represents 35 to 40 percent of total income.
They don’t see growth. They see risk.
A buyer looking at that business has to model what happens if that client walks the day after settlement. Not because it’s likely, but because they have to. Their lender requires it. Their due diligence process demands it. And when that modelling is done, the number changes.
Moderate client concentration, around 20 to 30 percent of revenue in a single account, typically reduces the EBITDA multiple by between half and a full turn. Severe concentration, above 40 percent, can cost one to two turns or push the buyer toward an earnout structure, where a portion of your sale price is held back until the client relationship is proven post-settlement. Some buyers walk entirely.
For a Queensland wholesale or manufacturing business doing $3 million in revenue with $400,000 in normalised EBITDA, a one-turn discount on a 3x multiple is $400,000 off your walk-in walk-out price. Not because the business is performing poorly. Because a buyer has to price the risk of the whale leaving on day one.
This is what the Exitability Framework refers to as key-person risk’s commercial cousin: Concentration Risk. The business’s revenue is tied to one relationship, managed exclusively by the owner, and when a buyer sees that, they don’t just discount the multiple. They question whether the business functions as an enterprise at all. That’s not a judgement on what you built. It’s the calculation their lender requires them to run.
Owner-dependent businesses already face a valuation discount of 30 to 40 percent during due diligence. When you layer client concentration on top of that, the two risks compound. The buyer isn’t pricing one problem. They’re pricing a business where the owner is the relationship, and the relationship is the revenue.
That number isn’t abstract. It’s the difference between the retirement you planned for and the one you can afford.
The Conversation Your Advisors Are Missing
This is the gap the standard growth conversation misses completely.
Your accountant doesn’t sit in a buyer’s seat. Neither does your financial planner. Nobody who advises you on growing the business is paid to tell you what that growth looks like when a buyer stress-tests it.
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Your accountant is optimising this year’s tax position. Your financial planner wants the sale proceeds to manage. Neither of them is asking what the revenue looks like stripped of its largest account. They are focused on what the business is earning. A buyer is focused on what the business is worth without you, and without your biggest client, in the room.
The advice to chase growth is not wrong. The sequence is.
Chasing revenue concentration before the business has the structural independence to absorb it creates a different kind of risk, one that doesn’t show up in the P&L but shows up in the sale price. The businesses that sell for what the owner needs them to sell for are not always the ones with the highest revenue. They are the ones where no single client crisis can move the valuation.
A client base where no single account exceeds 15 to 20 percent of revenue doesn’t just feel more stable to run. It reads as a fundamentally different risk proposition to a buyer. It tells them the business has enterprise autonomy, that the revenue isn’t contingent on one relationship surviving the ownership transition.
The real work of building a business worth what you need it to be is not a conversation for the six months before a broker gets involved. It starts years before the revenue tells the story you want it to tell.
That’s a confronting thing to sit with, particularly when the decision that created the problem felt like exactly the right call at the time.
The Number Worth Protecting
Pull up your last twelve months of revenue. Look at your top five clients. Not as a percentage of what you’ve built. As a percentage of what a buyer will be willing to pay for.
If one of those names is sitting above 25 percent of your total income, that number is not just a concentration risk in your current operations. It’s a discount a buyer will apply before they’ve walked through the door.
The Exitability Index, the diagnostic that measures a business’s structural independence from its owner, specifically flags client concentration as one of the factors that suppresses valuation score. It’s not a soft concern. It’s a number that moves.
When no single client can collapse the revenue story, you stop being a seller who needs a buyer. You become an owner who can choose one.
Most business owners I work with haven’t run that calculation. Not because they’re not smart enough to. Because no one asked them to.
The whale didn’t feel like a liability when it arrived. It rarely does.
