Fractional executives. What they cost, when they’re worth it, and the one thing nobody tells you.

If you run a business doing somewhere between £1M and £10M, you've probably considered hiring a fractional executive. A fractional CMO, a fractional sales director, a fractional COO. The pitch is appealing: board-level expertise, a few days a month, at a fraction of the cost of a full-time hire. No twelve-month recruitment process, no six-figure salary, no long-term commitment.

It's a genuinely good model. But there's a problem with it that almost nobody selling it will mention, and it's the same problem whether you hire a fractional exec, a consultant, or a brilliant full-time leader. I learned it the hard way, years before I understood what it really meant.

What a fractional executive actually costs.

A fractional executive is a senior leader who works with several businesses at once, giving each a slice of their time, typically one to three days a week, on a rolling engagement.

In the UK, expect to pay somewhere in the region of £4,000 to £6,000 a month for a quality fractional CMO, CSO, or COO, depending on days and seniority. Compare that with a full-time equivalent: a permanent commercial director on £100,000-plus, before national insurance, pension, bonus, and the months of recruitment to find them. On that maths, fractional looks like a bargain. You're getting seasoned, board-level judgment for roughly half the cost of a full-time hire, and you can start in weeks rather than months.

When a fractional executive is the right call.

Fractional works well when you need senior strategic thinking but don't have a full-time job's worth of it, or can't yet justify the salary. It suits a business that knows it has a gap at the top of a function, marketing, sales, operations, and wants experienced direction without the permanent overhead. For a lot of founder-led businesses, it's a sensible way to access expertise you couldn't otherwise afford.

So far, so good. Here's the part that doesn't make the sales brochure.

The one thing nobody tells you.

When the engagement ends, most of the value leaves with them.

A fractional executive, by definition, is temporary. They arrive, they apply twenty years of hard-won expertise, things improve, and then they move on to the next client. What's left behind in your business? Usually, not much. The thinking lived in their head. The judgment was theirs. The "how" was never written down, because they were hired to do, not to document.

Here's the thing: this isn't unique to fractional. It happens with any senior hire whose expertise lives in their head, including full-time ones. I learned it years ago with a permanent employee, and the lesson is exactly why fractional carries the risk in a sharper form. A fractional executive is temporary by design, so the day they leave is never far away. If a full-time hire can leave a hole, a fractional one is built to.

And it's structural to how senior expertise gets bought and sold. A 2026 study by VCMO of 180 UK fractional leaders found the market itself runs almost entirely on informal, undocumented, relationship-based work. Most engagements are won through personal networks, very little of it systematised. The expertise is real. It's just rarely turned into something that outlasts the person delivering it.

What this looked like in my business.

This one was a full-time hire, but it taught me the lesson that applies doubly to anyone temporary.

Years ago I ran a business selling exhibition stands. A niche, considered, relationship-heavy sale. I'd hired a sales team and, eventually, a full-time sales manager to run them. It worked. He was good. We grew the team to five salespeople under him, the numbers climbed, and for a few years everything ran smoothly.

It was all built on gut feeling and the seat of our pants. But it worked, so I didn't question it.

Then he moved on, as good people do. And the moment he left, I realised there was nothing left in the building. The team knew what they were doing, but only because they'd absorbed it from him over years of sitting alongside him. None of it was written down. There was no process, no documented way we sold, no objection-handling guide, no onboarding material. The entire sales operation lived in one person's head, and that person had just left.

What followed was painful. It took months to find a replacement, then his sixty-day notice period on top. When the new manager finally started, he had to learn not just our products (exhibition stands are a specialist world) but how we sold, what objections came up, what worked. And because nothing was documented, he learned the only way available at the time: physically sitting in the office, listening to live calls. This was before call recording, before any of the tools we have now.

All in, it took around nine months to get back to where we'd been.

What actually fixed it.

The fix wasn't hiring better. It was building what should have existed all along.

We sat down and created manual playbooks. Literally: here's how you sell, here's what you say in this situation, here are the routes a conversation can take, here's how you handle each objection. When we brought new salespeople in, they read the playbooks, learned them, and were tested on them.

To begin with it was slow and tedious. But once it existed, everything changed. Onboarding that had taken months now took weeks. The next hire didn't need to shadow someone for a year to become useful. They had the system on paper. The knowledge stopped being a person and started being an asset the business owned.

That was the lesson, and I've seen it play out in business after business since: talent is fragile, systems are durable. A brilliant hire who keeps everything in their head is a single point of failure. The same expertise, written down and built into how the business runs, is something you keep forever.

The real question to ask before hiring fractional.

None of this means don't hire a fractional executive. It means hire one with your eyes open, and ask a different question.

Instead of "what will this person do while they're here?", ask: "what will be left in my business when they're gone?"

If the answer is "a working system, documented and owned by us", brilliant. That's expertise that compounds. If the answer is "we'll have to hope the team remembers what they learned", you're renting a brain, and you'll be back where you started the day the engagement ends.

The best version of buying senior expertise isn't a person you rent. It's a system they install and you keep. Same judgment, same experience, but it stays in the building when they leave.

That's the difference between paying for advice and building an asset. And after nine months of learning it the hard way, I know which one I'd choose.

Layth

20+ years building and scaling B2B businesses. Scale DNA is what I do now, full-time. I write about the patterns I've seen running across hundreds of founder-led companies.