Insights

One big customer might be quietly cutting your sale price.

Plenty of Texas owners build a great business on the back of one or two relationships that took years to earn. It feels like strength. To a buyer, it often reads as risk. If a single customer drives a large share of your revenue, that concentration can quietly lower what your business sells for, and it is one of the few valuation problems you can actually fix before you go to market.

Why buyers treat concentration as risk, not loyalty

When you sell, the buyer is not paying for last year's revenue. They are paying for the earnings they believe will keep coming after you hand over the keys. Anything that threatens the durability of those earnings gets priced in as risk, and a customer who represents a big slice of your sales is exactly that kind of threat.

The buyer's question is blunt: what happens to this business if that customer leaves, gets acquired, renegotiates, or simply decides to bring the work in house? If the answer is "we lose a third of revenue and most of the profit," the buyer is not buying a stable business. They are buying a bet. And buyers pay less for bets.

It also changes who shows up. A clean, diversified business attracts strategic buyers and private equity who can pay a premium. A heavily concentrated one narrows the field to buyers who are comfortable with the risk, and a smaller buyer pool means less competition and a softer price.

How much concentration actually matters

There is no single magic number, but there are rules of thumb buyers use. As a general guide, any single customer above roughly 10 percent of revenue starts to get attention in diligence. One customer in the 20 to 25 percent range becomes a real discussion, and you will be asked to defend the relationship. A customer at 35 percent or more is often treated as a major risk that can compress the multiple or reshape the deal structure.

Concentration is not only about your top customer. Buyers also look at your top five together, at concentration in a single supplier, in one referral source, in one industry, or even in one salesperson who owns all the key relationships. The pattern they are testing for is the same: how much of this business depends on a single point of failure.

What concentration does to your deal, not just your valuation

A discount on the multiple is the obvious cost. The less obvious cost is in the structure of the deal. When a buyer is nervous about a concentrated revenue base, they protect themselves with terms instead of price. That can look like a larger earnout tied to whether the big customer stays, a bigger escrow holdback, a longer transition period where you stay on the hook, or a chunk of the price paid as a seller note rather than cash at closing.

In other words, concentration does not just lower the headline number. It pushes more of your money to the back end and ties it to outcomes you no longer fully control once you have sold. Two owners can agree to the same valuation and walk away with very different amounts of cash in hand, because one had a clean revenue base and the other did not.

How to fix it before you go to market

The good news is that customer concentration responds to time and intention. This is work you can start two to three years before a sale, which is the real argument for thinking about readiness early rather than the week you decide to sell.

• Grow the base. The cleanest fix is more customers. Even steady, unglamorous growth in your second and third tier of accounts pulls down the percentage your largest customer represents.
• Deepen and document the relationship. Move month to month handshakes onto real contracts with term and renewal language. A concentrated customer under a multi year agreement is far less scary to a buyer than the same customer on a verbal understanding.
• Spread the relationship inside the account. If one person at your company owns the entire relationship, that is its own concentration. Build multiple contacts so the account does not walk if one person does.
• Diversify deliberately. Add a new industry, a new channel, a new product line, or a new geography. The point is not just more revenue. It is revenue that does not all rise and fall together.
• Know your real numbers. Be able to show concentration by customer, by industry, and by margin. Owners who can present this clearly look in control. Owners who get surprised by it in diligence look like they were not paying attention.

You will not always get concentration down to zero, and you do not have to. The goal is to show a buyer a credible trend in the right direction and a business that survives the loss of any one relationship. That story, backed by clean financials, is what protects your price.

The bottom line for Texas owners

Customer concentration is one of the most common reasons a good business sells for less than the owner expected, and it is one of the most fixable. If you are weighing a sale now or in the next few years, the smartest move is to find out where you stand while you still have time to do something about it. That is the kind of straight assessment I give owners every week. You can see how the full process works on the Texas business broker page, dig into the financial pieces in the Insights library, or just tell me where you are.

This article is general information, not legal, tax, or financial advice. Your situation is specific to you.

Frequently asked questions

What is customer concentration when selling a business?

Customer concentration is how much of your revenue depends on a small number of customers. If one client makes up a large share of sales, a buyer sees the risk that losing that client would damage the business, so they often lower the price or change the deal terms to protect themselves.

How much customer concentration is too much?

There is no hard cutoff, but as a rule of thumb a single customer above roughly 10 percent of revenue draws attention, 20 to 25 percent prompts a real discussion, and 35 percent or more is often treated as a major risk that can reduce the valuation multiple.

Can I still sell a business with high customer concentration?

Yes. Concentrated businesses sell all the time. The trade off is usually a lower multiple or more of the price tied to earnouts, holdbacks, or a seller note. Reducing concentration before you sell, or putting key customers under contract, helps you keep more of the value and more of the cash at closing.

How far before a sale should I start reducing customer concentration?

Ideally two to three years out. Diversifying revenue and putting customers under longer agreements takes time, and buyers respond to a credible trend, so starting early gives you room to move the number in the right direction before diligence.