Your Biggest Client Stopped Spending – Now What?

Losing your biggest client is one of the few things every founder worries about and almost nobody prepares for. In this episode, Mark and Dominique will walk through what actually happens in the 90 days after it hits, then zoom out to the harder question: how you avoid ending up there again. That means carrying enough pipeline to hit your growth number even without your biggest account, and treating client concentration as something you manage on purpose instead of something a crisis forces on you.

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Key Takeaways

  • In Projectworks data from 700+ consulting firms, one client earns the average firm 36% of its revenue, and even firms of 100+ people get over half from their top five clients.
  • Being flat out for a few large clients hides how concentrated a consulting firm's revenue really is.
  • A consulting firm that loses its biggest client should decide within a week whether to carry its unbilled staff, because layoffs make hiring harder once growth returns.
  • When Nexient lost a major client, Mark Orttung hired senior people who could both sell and manage accounts, betting that a consulting firm can't cut its way back to growth.

Losing your biggest client strains your bench and cash from day one. Projectworks CEO Mark Orttung, who lived it at Nexient, and CCO Dominique Rennell share the 90-day plan.

How much of your revenue rides on one client?

Revenue concentration is the share of your revenue that comes from your largest clients. (Our guide to client concentration risk covers how to calculate it and why it hits valuation.) Across Projectworks' customer base, concentration falls as firms grow but stays high even at the top end.

Firm size Top client Top 3 clients Top 5 clients
10–19 seats 38.2% 65.5% 77.6%
20–49 seats 33.5% 59.4% 71.7%
50–99 seats 31.1% 54.9% 66.7%
100–999 seats 22.8% 43.6% 54.7%
All firms 36% 62.1% 74.0%
Share of annual revenue from each firm's largest clients, by seat count. Source: Projectworks customer data, 700+ consulting firms.

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Even at 100 or more seats, the top five clients bring in more than half of revenue.

When Mark joined Nexient, one client made up "like, 50 or 60% of the revenue," and as he sees it, "It's just this is kind of a natural part of the evolution of the firm," he said. "But you do want to work your way out of it."

No percentage makes a client safe to depend on, so the useful comparison is with firms your size. If your top client sits well above the figure in your row, you're carrying more risk than your peers, and the job is to bring that number down year by year.

In Dominique's words, "Your firm can look really healthy on all those other metrics. And kind of come down like a house of cards… because one contract is lost."

Why being busy hides the risk

The firms most exposed to a big client loss rarely feel exposed, because they're flat out delivering for a few large accounts and nobody has time to ask where next year's work will come from.

Mark Orttung, CEO of Projectworks
When you have a customer that's feeding you a lot of work, you just relax a little bit on some of your habits… as soon as that customer goes away, you're gonna wish you had been building your pipeline.
Mark Orttung · CEO, Projectworks

Dominique added that struggling to keep up can mask how concentrated the work is. She described a firm of around a dozen people, all serving one large client in the United States. When that client stopped spending for the rest of the year, 12 or 13 people had nothing to do and nobody had been out finding the next client.

The fix sounds unreasonable when you're stretched. "You sound a little crazy saying, let's go do more because we can't keep up with what we got," Mark said. Dominique's rule of thumb is to have something like 20% of your work coming from brand-new clients, though she admits that's easier said than done.

The 90-day plan after losing your biggest client

The first 90 days after a big client loss break into four stages, and the table below sets out what to measure, decide and do in each. Your bench (the consultants with no billable work) sets the pace. Its cost grows every week nobody is placed, so check it daily until it's back under control.

Stage Measure Decide Do
Day 1 Bench size and weekly cost Can the relationship be fixed? Find out what happened and whether it was avoidable
Week 1 How long cash lets you carry the bench Carry the team or cut Brief the team, then the board or investors
Month 1 Bench and pipeline, shared weekly Which bench staff go into single roles Ask everyone who they know, visit every client, check every project
Months 2–3 Whether new selling is producing pipeline Which two or three plays to back Invest in people who can sell, with deadlines

Day 1: find out what happened and whether you can fix it

Start with the uncomfortable questions:

  1. What happened?
  2. Could you have seen it coming?
  3. Is there anything left to save?

Be honest about your firm's part, because the issues that end an engagement have often been visible to your own team for a while, raised internally but never pushed hard enough with the people on the client side who make the call.

At Nexient, Mark Orttung's team had seen problems on a large engagement but never called them out, and the firm ended up owning them. The client fired Nexient, 50 people came back to the bench unexpectedly, and a six-figure refund demand followed. Mark tells the full story of losing that client.

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Then put a date on it. Knowing the weekly bench cost only helps once you've worked out how many weeks your cash covers, because that date drives every decision you make in week one.

Week 1: decide whether to carry the team, then tell them

Carrying the team means keeping unbilled people on payroll while you find them work. Cutting is cheaper this quarter, but layoffs carry their own cost for a firm that needs to sell its way back, because prospects and future hires both hear about them. As Dominique put it, if "the word on the street is you just let 15 people go, it's probably not a really strong brand story." The smaller your market, the louder that story travels.

Mark Orttung chose to carry the bench at Nexient, partly because the firm was in Ann Arbor, Michigan, a small market where he expected layoffs would leave it unable to hire once growth returned. Carrying it ran the firm's cash down to roughly zero over the year it took to recover, before Nexient went on to grow to $131 million. He's written about defending that call to a nervous board.

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Whichever way you go, tell your team within the week. If leadership stays quiet, people fill the gap with their own version of events, and it's rarely kinder than the truth. Brief your board or investors in the same week, with the numbers.

Month 1: turn the whole firm into a sales team

For the first month, selling is everyone's job. Run a weekly all-hands that shares the real numbers on who's on the bench and what's in the pipeline, then ask everyone who they know, because leads turn up in places no sales plan would cover.

Nexient ran that weekly all-hands after its client loss. One ask to the whole company landed a big contract with the local utility, because somebody's neighbor was a director there.

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Put the bench to work as well. Placing senior people into single roles at clients (staff augmentation) cuts the cost of carrying them straight away, and each placement gives you someone inside a client whose second job is finding the next project and a way to bring a team in. This is also the month to visit every remaining client and check the health of every project, since the warning signs that cost you one client may be sitting in another.

Months 2 and 3: is your selling working?

By month two, the question is whether your selling is producing real pipeline. If it isn't, the fix usually costs money at exactly the moment you have least of it.

Mark Orttung, CEO of Projectworks
We invested in three really senior people that could be both sales and account management. And the theory was you can't cut your way out of this. You have to find a way to grow. You have to get better at selling.
Mark Orttung · CEO, Projectworks

The same bet works on a smaller budget. Back two or three plays hard and give each one a deadline, so that by the end of month three you know which are working.

Dominique saw it at a New Zealand firm that had maybe 60% of its revenue with one client for over a decade, until a new marketing manager there moved the work to an agency they'd worked with in a previous role. The founder hired someone to go to every event, which he hated doing himself, plus a comms and social media hire to make the agency look as big as possible. Both had three months to show results.

Start diversifying while your biggest client is still happy

Every step of the 90-day plan is harder with a full bench and shrinking cash, so the better move is to plan for client losses before they happen. Nexient assumed it would lose around five of its 40 or 50 clients each year, one per region, and built its pipeline big enough to absorb them.

In the next episode, Mark and Dominique get into sales compensation for consulting firms, including why some firms pay a higher commission rate on new business.

If the call does come, the Day 1 questions about your bench, what it's costing you and what's in your pipeline should take minutes to answer.

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2026-10-22T11:30:00

Sales Compensation For Consulting Firms

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