Article 04 — When Long Term Contracts Become Margin Liabilities
The contract had been celebrated when it was signed. 3 years of committed revenue, a significant account, and pricing that reflected the market conditions ...
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The customer had been with the business for 11 years.
The relationship was genuine, the account was profitable, and the commercial team managed it with the care that a relationship of that duration deserved. When the customer’s procurement team opened the annual renewal conversation with a request for a 12% price reduction, the commercial team knew the negotiation would be difficult. What they had not fully examined was how difficult the business’s own financial position made it.
The customer represented 34% of revenue. The fixed cost base had been sized, at least in part, around the volume that customer generated. Losing the account was not a realistic option the business could absorb without significant operational restructuring. The customer’s procurement team did not need to know that explicitly. The negotiating dynamic communicated it clearly enough. The price reduction was agreed. The margin on the account compressed immediately. And the conditions that had made the negotiation so one-sided had been building for years without anyone examining them as a margin risk.
Revenue concentration is discussed most often as a revenue risk. The concern is what happens to the top line if a concentrated customer reduces volume, churns, or is lost to a competitor. That is a legitimate concern. But the margin dimension of revenue concentration is equally significant and less commonly examined.
Concentration creates margin vulnerability through 3 mechanisms that operate independently of whether the concentrated customer is retained or lost.
The first is negotiating leverage erosion. When a customer represents a large enough share of revenue that losing them would create a structural financial problem, the business has implicitly transferred pricing power to that customer. Every renewal conversation, every contract renegotiation, and every commercial dispute is conducted against a backdrop of dependency that the customer’s commercial team can sense and exploit. The margin on concentrated accounts is not just a function of the value delivered. It is a function of the negotiating position the concentration has created.
The second is margin subsidy pressure. When a large customer demands pricing, service levels, or commercial terms that are margin-dilutive, the business frequently absorbs those terms because the volume justifies the relationship even at compressed margins. The margin compression on the concentrated account is then subsidized by the margin generated on smaller accounts that do not have the same negotiating leverage. The concentrated customer benefits from the subsidy without being aware of it, and the business’s overall margin profile is shaped by a customer relationship that it cannot easily restructure.
The third is cost structure distortion. When the business builds capacity, staffing, and infrastructure to serve a concentrated customer, those investments become fixed costs that the business carries regardless of what happens to the relationship. If the customer reduces volume or churns, the cost structure built to serve them does not reduce proportionally. The margin impact of the volume loss is amplified by the fixed cost base that the concentration created.
“We had built our operations around that account for 8 years. When they reduced volume by 30%, we discovered how much of our cost structure existed specifically to serve them.”
Revenue concentration also creates a pricing discipline problem that compounds over time. Businesses that are dependent on concentrated customers are less willing to enforce pricing discipline with those customers than they are with smaller accounts. Discount requests are more likely to be approved. Term extensions are more likely to be granted. Commercial concessions are more likely to be made to preserve the relationship.
Each concession is individually justifiable given the importance of the account. Collectively, they produce a margin profile on the concentrated accounts that is significantly below what the business charges customers who do not have the same leverage. The concentrated accounts, which should be the most strategically important relationships in the business, frequently generate the lowest margins precisely because their strategic importance has eroded the commercial discipline that would otherwise protect those margins.
Treating financial risk and margin protection as a lens for examining revenue concentration changes the conversation from how do we retain this customer to what is this concentration costing us in margin terms and what structural conditions is it creating that we need to manage deliberately.
Managing revenue concentration as a margin risk requires building an explicit view of the margin profile of concentrated accounts alongside the revenue profile and examining whether the margin the business generates from its most important relationships reflects the value it delivers or the negotiating dependency the concentration has created.
“When we mapped the margin by customer alongside the revenue by customer, the largest accounts were not our most profitable ones. The concentration had been compressing their margins for years.”
It also requires examining the cost structure built around concentrated accounts to understand what fixed costs would remain if those relationships changed and building contingency into the financial planning that reflects the actual exposure rather than the assumption that the relationships will remain stable indefinitely.
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The contract had been celebrated when it was signed. 3 years of committed revenue, a significant account, and pricing that reflected the market conditions ...
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The supplier had been a partner for 9 years. Reliable delivery, consistent quality, and pricing that had been stable enough that the procurement team had s...
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