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The Hidden Threat of Your Biggest Customer · Modularity Podcast

• 0:00
  Your biggest customer might be the most dangerous thing in your business.
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  Not because they're difficult.
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  Because of what they quietly turn you into.
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  When one client controls a big slice of your revenue, you stop being an independent
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  company and start being an unpaid subsidiary.
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  That's a rough way to say it, but it matches how a buyer sees it.
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  One valuation firm, Sofer Advisors, puts it bluntly: a business with 40 percent or
• 0:24
  more of revenue from one customer is, in economic terms, not fully an independent
• 0:30
  business.
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  It's a subcontractor to that customer.
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  And the trap is that landing that account feels like the breakthrough.
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  The contractor who gets the huge facility contract.
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  The manufacturer whose biggest buyer doubles their order.
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  The medical supplier with one big health system.
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  Everyone celebrates.
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  Nobody asks what the business looks like on the day that customer leaves.
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  So let's put numbers on it.
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  The standard check is simple.
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  Take what your top customer paid you over the last twelve months,
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  divide by total revenue.
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  Then do the same for your top five combined.
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  Corporate Finance Institute calls it low concentration when the top five are under
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  25 percent of revenue, and high when they're over 50.
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  And buyers have a threshold for a single account too.
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  Twenty percent is the flag.
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  Sofer says any customer at 20 percent or more gets flagged in serious due diligence.
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  Between 25 and 40 percent, they typically discount the price 10 to 20 percent.
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  Above 40, it's 20 to 30 percent or more.
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  Another firm, FOCUS Investment Banking, cited through an exit planning writer at
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  Livmo, puts it at 20 to 35 percent once a customer passes 30 percent of revenue.
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  Here's the math Sofer uses, and it's illustrative, not someone's real deal.
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  A buyer pays five times earnings for a business making one million dollars.
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  That's five million.
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  But if the customer that's 40 percent of revenue leaves within 18 months,
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  earnings might fall to 600 thousand.
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  The buyer just overpaid by two million, so they price that in upfront.
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  Now, a lot of owners say, I'm not selling, so who cares.
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  I'd push back on that.
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  The sale price is just the place where the risk gets a number.
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  You're carrying that risk every single day.
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  Right, and it shows up before any sale.
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  When a customer is 30 percent of your revenue, they know you can't afford to lose
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  them.
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  So they ask for custom pricing.
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  Payment terms stretch from Net 30 to Net 60, maybe Net 90.
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  Extra scope shows up without extra billing.
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  Then the operations bend around them.
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  Your best people get pulled onto that one account, exceptions pile up,
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  and the smaller, higher margin customers get whatever attention is left.
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  And there's an illusion of security on top of it.
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  The business feels busy, so the owner stops building pipeline.
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  Now there's no engine to replace the whale.
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  And the whale doesn't need a dramatic reason to leave.
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  A new procurement manager.
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  A budget freeze.
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  A decision to bring the work in house.
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  Any of those can erase your margin almost overnight, and then you're making layoff
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  decisions in a panic.
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  There's also the lender angle, which people miss.
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  Lenders are often stricter than buyers.
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  Sofer says SBA lenders frequently cap concentration around 25 to 30 percent,
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  and some get nervous above 20.
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  If a buyer can't get financing, your buyer pool shrinks to people with cash,
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  fewer bidders, lower price.
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  So what do you actually do?
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  Fire the big customer?
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  Because I've heard that advice, and it's terrible.
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  It is terrible.
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  You dilute, you don't fire.
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  The goal isn't less revenue from the big account.
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  It's more revenue from everyone else, so the big account becomes a smaller share.
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  Sofer says that typically takes 18 to 36 months of steady effort,
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  because signing a new customer isn't the same as getting real revenue from them.
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  Which means timing matters.
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  If you might sell in two or three years, you have runway.
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  If it's twelve months, you mostly accept the discount.
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  And buyers look at the trend.
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  Going from 50 percent down to 30 percent shows you're managing the risk,
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  and that earns a smaller discount than a number that never moved.
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  Second move is contract armor.
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  If your biggest account is on a handshake or month to month,
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  fix that.
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  Aim for a two or three year agreement with a long notice period,
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  say six to twelve months, and an early exit fee.
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  Sofer's example is a five year contract with twelve months of notice.
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  That gives you twelve months of protected runway to replace the revenue,
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  and it can shrink a discount from 20 to 30 percent down to roughly 5 to 10.
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  Third is something I don't think owners talk about enough.
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  Whose phone does that customer call?
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  If the answer is the owner's personal cell, a buyer sees a client loyal to a person
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  who's about to leave.
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  Livmo makes that point directly.
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  So move the relationship to a dedicated account lead and documented delivery steps,
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  so the customer trusts the company, not just the founder.
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  Fourth, check the real margin on that account.
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  Count the unpaid overtime, the admin friction, the slow payments.
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  Some owners find their biggest customer is their lowest margin customer.
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  Which is a funny way to find out you've been working for free.
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  Then use what you built.
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  The processes and results you developed for that big account can attract three to
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  five similar companies in the same field.
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  And keep a cash cushion of three to six months of operating expenses,
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  so a sudden cancellation doesn't force bad decisions.
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  Okay, quick wins for this week.
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  One, run the audit.
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  Last twelve months, top customer over total revenue, then top five over total
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  revenue.
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  If one customer is over 20 percent, or your top five are over 50,
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  treat it as a strategic priority.
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  Two, test the founder tether.
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  Look at how that customer reaches you.
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  If everything runs through your private phone, name a team account manager this
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  month and start the handoff.
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  Three, pull up the contracts for your top accounts.
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  Note the renewal dates and the notice windows.
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  You want to know about any 30 day exit before it becomes a surprise.
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  The takeaway is simple.
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  A big customer is a great problem to have, but only if you could survive losing
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  them.
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  Build the company so that goodbye is a bad quarter, not the end.
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  And if you need help building a smarter, more resilient business,
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  you can learn more at modularity.us.