Key Takeaways
- A large customer can help a business grow while also creating financial risk if too much revenue depends on that relationship.
- Revenue concentration is only part of the picture. Consider how much profit, accounts receivable, staffing, equipment, and other costs are tied to your largest customers.
- Losing a major customer doesn’t necessarily reduce expenses at the same rate as revenue, particularly when fixed costs have grown to support the account.
- Modeling what would happen if a major customer reduced or ended its business can help you understand your exposure before a problem occurs.
- Reducing customer concentration doesn’t mean turning away good business. The goal is to grow other sources of revenue and be deliberate about investments tied to large accounts.
Landing a large customer can be a turning point for a business. Revenue grows, and cash flow could improve. You may hire additional employees, invest in equipment, or expand capacity to keep up with the new work.
All of that can be good news. But as that customer becomes a larger part of your business, something else happens: losing them becomes more expensive.
That is customer concentration risk, and it can develop gradually enough that business owners don’t always recognize it. A customer that represented 5% of revenue a few years ago may now account for 15%, 20%, or considerably more. At that point, you’re not just benefiting from a valuable relationship. Part of your business may be depending on it.
How Much Is Too Much?
There isn’t one percentage that makes customer concentration automatically dangerous. A lot depends on your industry, margins, contracts, how predictable the revenue is, and how quickly you could replace the business if it disappeared.
Still, it’s worth knowing the numbers. In financial reporting, 10% of revenue is commonly used as the threshold for identifying a major customer. That doesn’t mean a customer representing 10% of your revenue is necessarily a problem, but it does provide a useful reminder that concentration becomes something worth paying attention to well before one customer accounts for half your business.
Start by looking at how much of your total revenue comes from your largest customers. Then go a step further. How much of your profit comes from those customers? How much of your accounts receivable do they represent? Have you hired employees, purchased equipment, taken on debt, or added other fixed costs specifically to serve them? Those answers can give you a much better picture of your actual exposure.
A Great Customer Can Still Create Risk
Customer concentration isn’t necessarily the result of poor planning. In many cases, it happens because a relationship is going extremely well. A good customer sends more work your way. You have the capacity to take it on, so you do. They refer you to another division or ask you to expand what you provide. Over several years, the relationship grows.
The danger is allowing the rest of the business to become dependent on revenue that isn’t guaranteed forever. Even a long-standing customer can leave for reasons that have little to do with you. The company could be sold, leadership could change, or a new procurement policy could require competitive bidding. The customer could experience financial problems, bring work in-house, change direction, or simply decide to use another provider.
If that happens, the question isn’t only how much revenue disappears. It’s what happens to everything you built around that revenue.
Look at What Would Be Left Behind
Suppose one customer represents 25% of your revenue. Losing that customer doesn’t necessarily mean your expenses fall by 25% at the same time.
You may still have the employees you hired to handle the work. Your rent doesn’t change, and neither do most insurance premiums, software subscriptions, equipment payments, or other fixed expenses. If the customer also represents a significant portion of outstanding accounts receivable, a payment problem could put additional pressure on cash.
This is why it can be helpful to model the impact before there is a problem. What would your income statement look like if your largest customer cut its business with you in half? What if it disappeared altogether? How long could you maintain your current staffing and expenses while replacing the revenue?
You don’t need to assume the worst is going to happen, but you should know what the worst would look like.
Reducing Concentration Doesn’t Mean Losing a Good Customer
If you discover that one customer represents more of the business than you’re comfortable with, the answer isn’t to turn away good work. Instead, think about how you can grow around that customer.
That might mean putting more resources into business development, expanding into another market, adding complementary services that appeal to other customers, or setting a goal for how much new revenue should come from sources outside your largest accounts.
You can also be more deliberate when making investments tied to one customer. Before adding permanent staff, taking on debt, or making a major equipment purchase to support a large account, consider what happens to that investment if the customer’s needs change.
Contracts can provide some protection as well, particularly when significant investments are required to serve a customer. Depending on the relationship, longer commitments, minimum purchase requirements, termination provisions, or other terms may help reduce some of the uncertainty. Those decisions should be made with appropriate legal guidance.
Know the Risk Before You Need to React
A large, profitable customer is a good thing. The goal isn’t to make every customer equally important or to avoid opportunities because they might make up a significant share of revenue.
The goal is to understand how much of your business depends on a small number of relationships and what would happen if one of them changed.
If you aren’t sure how concentrated your revenue has become, we can help you look at the numbers, understand the financial impact, and think through ways to reduce the risk without walking away from valuable business. Contact us to start the conversation.