The Client Who Could End You

There’s a number in your business you have almost certainly never calculated, and it takes about four minutes.

Take your largest client’s revenue over the last twelve months. Divide it by total revenue.

Go do it. I’ll wait.

If that number is under ten percent, you can read the rest of this for sport. If it’s between fifteen and twenty five, you have a project. If it’s north of thirty, you don’t own a business. You own a job with unusually good branding, and somebody else controls whether it continues.

I watched a guy go through this. Marketing services, good operator, seven years in. One logo was 38 percent of his revenue and he was proud of it, the way you’re proud of a big fish.

New CFO showed up in November. Budget reset January 1. Vendor consolidation review in the second week. Not because he did anything wrong. He got a twenty minute call and a thirty day notice, and 38 percent of his company disappeared into somebody else’s org chart reshuffle.

He spent the next fourteen months rebuilding, and the part that actually broke him wasn’t the money. It was discovering that for three years he had been running somebody else’s marketing department while telling himself he was running a company.

The reason I’m writing this in September is that the calendar is loaded against you right now. Budgets reset in January. Procurement reviews cluster in Q4 and Q1. New executives arrive with a mandate to consolidate vendors and they do it in their first ninety days because that’s what makes a new executive look decisive.

The decision that kills your Q1 is being discussed right now, in a room you’re not in.

Currency one, the obvious one: existence. One client at thirty percent means one phone call takes a third of your revenue and probably more than a third of your profit, because your anchor client is usually the one whose work is best systematized.

Currency two, the one nobody talks about: leverage. This one is bleeding you today, not hypothetically.

Your anchor client knows the number. Maybe not precisely, but they know. Everybody on their side knows that you need them more than they need you, and it shows up in a dozen small ways you’ve stopped noticing.

The scope creep you absorb. The “can you just” that becomes eleven hours. The payment terms that stretched from thirty to sixty and you said it was fine. The rate you haven’t raised in three years because you couldn’t stomach the risk of raising it. The meeting you took on a Sunday.

Add it up. Your anchor client is almost always your worst margin client, and it happened one small concession at a time, and every one of those concessions was priced by a fear you never named out loud.

Currency three: what it’s worth on paper. If you ever sell, and one day either you sell or you die at your desk, concentration is the single most predictable discount a buyer applies.

Buyers generally want no single customer above ten to fifteen percent and the top five under forty. Above twenty percent, it’s common to see one to two turns of EBITDA come off the price. Above thirty, reported discounts run in the twenty to thirty five percent range, and a meaningful number of institutional buyers just pass.

And it’s worse than the headline, because it changes the structure. Concentration is the classic trigger for earnouts and holdbacks. Thirty to fifty percent of your purchase price gets tied to that client staying after you, the guy the relationship actually belonged to, have left. Your money ends up on the far side of a risk you no longer control.

That’s the part to sit with. Concentration doesn’t just lower the number. It moves your money behind a door you handed somebody else the key to.

Client revenue is the one everybody’s heard of. There are three more and they’ll kill you just as dead.

Channel concentration. What percentage of new business comes from one source? One ad platform. One referral partner. One marketplace. One conference. One person who sends you work.

This is the most dangerous of the four because it’s invisible while it’s working. Meta changes attribution, a partner retires, a marketplace changes its ranking, and your new business goes to zero in a week with no warning letter and nobody to call.

Person concentration. Who is the single point of failure, and let’s be honest about the answer, it’s frequently you.

Which relationships live in one person’s phone. Which processes exist in one person’s head. Which vendor only picks up for one guy. If that person is out for three weeks, what stops.

Margin concentration. This one is sneaky and almost nobody measures it. Revenue can look beautifully diversified while one service line carries all the actual profit. Four lines, twenty five percent of revenue each, and one of them delivers eighty percent of the margin while the others generate motion and payroll.

Run margin by line, not just revenue by line. Most owners have never done it and about a third of them are genuinely shocked.

One page. Update it quarterly. This is the whole diagnostic.

Six rows:

Top client as a percentage of revenue. Green under 10. Yellow 10 to 20. Red above 20.

Top five clients combined. Green under 30. Yellow 30 to 50. Red above 50.

Top acquisition channel as a percentage of new business. Green under 30. Yellow 30 to 50. Red above 50.

Top service line as a percentage of gross margin. Not revenue. Margin.

Owner dependency. Percentage of clients who would consider leaving if you personally stopped being involved. If you don’t know, that’s a red, and finding out is this quarter’s work.

Key person coverage. For each of your top three people including yourself, how many days could they be gone before something visibly breaks. Under five days is red.

Write it out. Six numbers, one page, in a folder you open every quarter. Most men have never seen their own business summarized this way and the first look is usually uncomfortable.

While you’re at it, run the same test on your calendar. If your anchor client is thirty percent of revenue and sixty percent of your hours, that’s not a client, that’s an employer. I use Rize for this specifically, because guessing at where your hours went is a losing game and the account tag makes it visible. When the revenue share and the time share don’t match, one of those numbers is lying, and it’s usually the one you like better.

You’re not going to fix a concentration problem this quarter. The honest timeline is twelve to twenty four months. But you can change your position substantially by New Year’s, and there are five moves in rough priority order.

The fastest risk reduction available to you is not a new client. It’s converting the existing relationship from month to month into something with notice provisions and a term.

A thirty percent client on a handshake is a crisis waiting for a date. The same thirty percent client on a three year agreement with a ninety day notice provision is a manageable position. Buyers discount contracted revenue far less, lenders treat it differently, and most importantly you get warning instead of an ambush.

Here’s the conversation, and you have it now, while things are good, because you cannot have it when things are shaky:

“I want to talk about next year. You’re our most significant relationship and I want to build around you properly, which means I’d rather commit to capacity and pricing over a longer term than renegotiate every twelve months. I’m proposing a two year agreement with a ninety day notice on either side. I’ll hold this year’s rate for the first year in exchange for the term. What would you need to see to be comfortable with that?”

You’re trading a price concession for a term, and it’s a trade worth making. Notice the notice provision is mutual, which is what makes it reasonable rather than a trap.

Count the people at your anchor client who would take your call tomorrow.

If the answer is one, your revenue isn’t tied to a company. It’s tied to a human being who could get promoted, reorganized, fired, or hit by a bus, and any of those ends you.

Target three relationships minimum: the person who uses your work, the person who approves the budget, and one peer somewhere else in the building. Get there deliberately. Bring somebody from your team to the next meeting so there are two on your side. Ask your champion for an introduction to the person who owns the budget and frame it as wanting to make sure the work is landing against their goals, which is both true and unobjectionable.

This is the single cheapest thing on this list and almost nobody does it because it feels slightly disloyal to the champion. It isn’t. It’s professional.

The ratio improves two ways and only one of them is under your control right now.

You can’t shrink the anchor without bleeding. You can grow everything else.

Set a specific target, because vague diversification never happens. Take clients two through ten and set a number for what they need to reach by March for your top client to drop below twenty percent. Then work that number like a sales goal, which is exactly what it is.

And here’s the honest part. Most of your non anchor clients are underserved. They get your leftover attention because the anchor eats it. The fastest diversification in most small businesses isn’t new logos, it’s the eight existing relationships nobody has called with an actual idea in nine months.

Channel concentration gets fixed the same way, and the mistake men make is trying to build a second channel at full scale.

You don’t need a second channel that matches the first. You need one that exists, has produced at least one client, and could be scaled if the first one died. A channel you’ve never used is not a backup. It’s a hope.

Pick one. Give it a small, real, recurring commitment between now and December. Two hours a week. A backup that produces ten percent today can produce forty percent in a crisis. A backup that produces zero produces zero.

Take your top three people, yourself included, and answer one question each: if this person vanished for three weeks, what specifically stops.

Then spend two hours per person killing the top item.

The passwords live in a vault the business owns, not in one guy’s browser. The client relationships have a second named contact on your side. The process that lives in somebody’s head gets written down badly, because a bad written version beats a perfect undocumented one every single time.

The fastest version of this isn’t documentation at all, it’s removal. Every handoff you wire together is a dependency that stops being human. I’ve got Make scenarios running reporting, intake, and client notifications that used to require a specific person remembering on a specific day. The documentation for those is now “it runs,” which is the only documentation that never goes stale.

Sometimes the right answer is to reprice or release the anchor.

If your biggest client is your worst margin, dictates your terms, treats your team badly, and has you at thirty five percent, you’re not managing a client relationship. You’re managing a hostage situation where you’re the one paying the ransom.

The reprice conversation is not complicated and it’s not aggressive:

“I need to bring our rates in line with where the work has gone. Here’s what the scope looked like when we set this, here’s what it looks like now. The new number is X, effective in January. I want to keep doing this work and I wanted you to hear it from me with a full quarter of notice.”

Then be ready for a no. That’s the whole point. If you can’t survive a no, you already know your number is too high, and the reason you can’t have this conversation is the reason you need to.

I’d rather you lose that client in March, deliberately, with a quarter of runway and a plan, than lose them in January because somebody you’ve never met reorganized a department.

You didn’t build this so you could have one boss with a bigger logo.

The whole point of ownership was supposed to be that no single person could end your year with a phone call. Concentration is how that promise quietly gets reversed, and it never happens through a bad decision. It happens through a series of good ones. You land a great client. They give you more. You give them your best people. It grows. Every step of that is success, and somewhere in the middle of it you became an employee again without anybody telling you.

The number takes four minutes to calculate.

Go get it, write it on the exposure sheet, and then decide whether you’re comfortable with what it says about who’s actually in charge of your business.

Refined. Relentless. Unapologetic.

Marcus