A strong anchor client renewing at the start of a new financial year is one of the better feelings in business. The revenue is secure, the relationship is stable, and the team can focus on delivery rather than business development. What that picture does not show is how a future buyer reads the same situation: not as evidence of strength, but as a concentration of risk they will price before any conversation about the headline number begins.
Customer concentration builds through success rather than negligence. A client is served well, they grow, and their share of revenue grows alongside them. Over several years the relationship feels less like an exposure and more like a commercial foundation. A buyer does not experience it that way. A buyer sees a single point of failure and adjusts the offer to reflect what happens if that point breaks after settlement.
With June 30 five days away, the revenue picture for the financial year is coming into focus. For business owners thinking about an eventual sale, whether that is two years from now or six, the composition of that revenue matters as much as the total. A business approaching a sale process with one client representing 30 per cent of revenue is a structurally different asset from one where that share is spread across eight or ten relationships, even when both businesses show the same profit in the accounts.
What Buyers Calculate Before They Make an Offer
The threshold at which buyers consistently flag concentration risk is when one customer accounts for more than 20 per cent of total revenue. At that level, the buyer’s financial model asks a specific question: if this client reduces their contribution in the first year after settlement, what does the earnings picture look like? That question shapes the offer more than any headline negotiation that follows.
Below 15 per cent for the single largest client, most buyers treat the revenue distribution as acceptably spread. Above 20 per cent, the discount begins. Above 30 per cent, the deal structure itself often changes. An earnout clause makes a portion of the purchase price conditional on the anchor client continuing for one to two years after the sale closes. A condition precedent requires written confirmation from that client before the deal proceeds. Both mechanisms transfer the concentration risk back to the seller. The headline price may appear comparable, but a portion of the proceeds becomes dependent on a decision made by someone who is not party to the transaction.
The arithmetic behind this is worth understanding before any exit planning begins. A business normalising at $600,000 in EBITDA that attracts a 5x multiple on a well-distributed client base is worth $3 million. The same business with significant concentration might attract 3.5x, a difference of $900,000 for identical underlying earnings. That gap does not close in negotiation. It closes, or fails to close, in the years before a sale process starts.
What Makes the Relationship More or Less Transferable
The percentage of revenue is only part of what a buyer assesses. The nature of the anchor relationship matters equally. A client on a formal, documented commercial arrangement, where the business relationship is embedded in contracts and systems rather than held personally by the founder, presents a different risk profile from one whose entire relationship sits with the current owner. In the second case, the buyer is not just asking whether the client stays. They are asking whether the client stays when the person they have always dealt with is no longer involved.
Evidence of stickiness across the full client portfolio changes the picture materially. A business whose client base has retained well across personnel changes and product evolution demonstrates that revenue depends on what the business does, not on who owns it. This is the evidence that allows a buyer to treat even a concentrated anchor relationship as a structural asset rather than a personal one. Three years of consistent client retention data, visible in the accounts, carries more weight in due diligence than any assurance given during negotiation.
Starting the Work That Shifts the Number
The most effective response to concentration risk is not to exit the anchor relationship. It is to build alongside it. Twelve to twenty-four months of growing a second and third client tier, until no single relationship dominates revenue, changes how a buyer reads the same business entirely. The anchor client does not need to shrink. The portfolio around it simply needs to develop enough that no single departure can materially alter the earnings picture.
An Exit Readiness Diagnostic scores the business across the eight dimensions buyers consistently examine, with customer concentration and owner dependence typically producing the widest gap between an owner’s expectation and what a buyer’s model reflects. The diagnostic identifies where that gap sits today, which specific client relationships carry the most departure risk, and what actions would close the most ground before a planned sale.
The new financial year begins on Monday, making this week one of the more useful moments to understand what the completed accounts reveal about client composition. A business valuation at this point quantifies where the current concentration is suppressing the multiple and what the realistic upside looks like once the portfolio distribution changes. ProfitPulse works with owner-led businesses across Queensland and the East Coast to build that picture from the EOFY data available right now. Book a complimentary 45-minute discovery call with ProfitPulse.
Frequently asked questions
What level of customer concentration concerns buyers in an Australian business sale?
When one customer accounts for more than 20 per cent of total revenue, most experienced buyers flag the concentration in their risk model. At 30 per cent, it often shapes how the deal is structured rather than remaining a risk note. The specific threshold varies by industry and deal type, but the underlying concern is consistent: what does the earnings picture look like if that client’s contribution reduces or stops in the months after ownership changes?
How does customer concentration affect business valuation multiples in Australia?
Customer concentration reduces the earnings multiple a buyer is prepared to apply. The discount reflects the risk that concentrated revenue may not survive an ownership transition at the same level. On a business generating $600,000 in normalised EBITDA, the difference between a 5x and a 3.5x multiple is $900,000 in sale price. Understanding what drives your business valuation before a sale process begins identifies which structural factors are suppressing the multiple and how to address them.
What is an earnout and why is it common in concentrated business sale transactions?
An earnout is a deal structure where part of the purchase price is deferred and paid only if specific post-settlement conditions are met. In concentration-related transactions, the deferred amount is typically linked to the anchor client relationship continuing for a defined period after the sale closes. It transfers concentration risk from buyer to seller. The headline price may appear similar to other transactions, but a portion of the proceeds depends on a decision made by a third party.
Can I sell my business if one client is 30 per cent of revenue?
Yes, but deal terms often differ. Buyers may apply a lower earnings multiple, include an earnout tied to the anchor client continuing post-settlement, or add a condition requiring that client to confirm in writing before the sale closes. None of these outcomes is inevitable, but they become more likely when significant concentration is visible at the start of the due diligence process and not addressed before the sale approach is made.
How do I know if my main client relationship would survive a change of ownership?
The clearest indicators are whether the relationship is contractually documented or personally held by the founder, and whether the client has worked with more than one contact across the business. A client whose entire relationship sits with the current owner on informal terms represents concentrated departure risk. A client on a documented fee structure who interacts with multiple team members is a more transferable arrangement. A buyer assesses both the concentration percentage and the portability of the specific relationship.
How early should I start reducing customer concentration before selling my business?
Twelve to twenty-four months of focused effort before a planned exit gives changes time to show across two financial years, which is what a buyer needs to treat an improvement as embedded rather than recent. The most effective approach is growing the second and third client tier until no single relationship dominates revenue. An Exit Readiness Diagnostic identifies where concentration sits today and which actions would close the gap most effectively before a sale process begins.
What does the Exit Readiness Diagnostic cover for Queensland and NSW business owners?
The Exit Readiness Diagnostic scores a business across eight buyer-grade dimensions: financial quality, contracts, customer concentration, owner dependence, systems and processes, team depth, growth story, and risk profile. Customer concentration and owner dependence consistently produce the widest gap between an owner’s internal view and what a buyer would pay. The diagnostic takes approximately two weeks and delivers a scored report with prioritised actions across each dimension, making it the natural starting point for structured exit preparation.
Leave a Reply