Fractional COO Guide: When To Hire One & How It Works

If you’re reading this, there’s a reasonable chance you’re a founder whose business has grown past the point where you can run it on instinct and spreadsheets — but not yet past the point where a full-time COO at £150k+ makes sense. That middle ground is where a fractional COO lives.

This guide is the operator’s-eye view. I’ve worked exclusively with founders of scaling businesses since 2014, first as the MD of the digital agency I ran and sold to the listed Panoply group, then as COO of that listed group as we scaled from £31.5m to £83m in revenue and from 361 to 700 people, and now as an independent fractional COO working with tech-centric scale-ups in the UK and US. What follows is what I wish I’d been able to find in a single place when I was first trying to work out whether a fractional COO was the right call for the business I was running.

Here’s what you’ll get:

What a fractional COO actually is (and what they aren’t)
The signs a business is ready for one
What the work looks like in an average week
How fractional differs from interim, consulting, and advisory
What it costs compared to hiring full-time
How to spot a good one
When a fractional COO is the wrong answer

What a fractional COO actually is

A fractional COO is a chief operating officer who works inside your business for a defined number of days a week or month, embedded in your leadership team, carrying the same operational responsibilities they’d carry if they were sitting in the COO seat full-time.

That’s the definition. It’s not quite what most founders are buying when they hire one.

What they’re actually buying is an experienced operator who can walk in, read the operational state of the business in a few weeks, and then start making it work better. Not by writing reports. Not by running workshops. By doing the job. I’m a hands-on leader and practitioner who’s spent more than 26 years in the trenches as a founder, MD and COO — not a consultant with theory, untested frameworks and a lot of slides.

The fractional part is about cost and flexibility — you’re paying for a slice of someone’s week, not all of it. The COO part is the operator bit: this person is inside the business, carrying executive responsibility, not advising from a distance.

If you think of a COO as the person who makes sure the strategy the CEO has decided on actually gets executed — who runs the operational rhythm, who owns the shape of the organisation, who makes sure the promises the business makes externally are kept internally — then a fractional COO is that person, on the days your business needs them.

When a founder actually needs a fractional COO

Most founders I work with don’t come looking for a fractional COO because they’ve read an article about what one is. They come looking because something specific has gone wrong, and they can feel it even if they can’t quite name it. These are the patterns I see again and again with founders of £1m–£15m businesses with 10 to 125 people:

You’re the bottleneck. Every decision above a certain size comes back to you. You’ve tried to delegate but it keeps bouncing. The team defaults to asking you because the cost of being wrong is higher than the cost of waiting.

You’re firefighting instead of building. The calendar is full of things breaking. By the time you fix one thing, two others are on fire. There’s no time to do the work that would stop the fires starting in the first place.

Your leadership team is good at their jobs but not at running the business. Your head of product is brilliant at product. Your head of sales is brilliant at sales. But nobody is stitching those functions together into something that operates as one business.

Growth has broken the way you run the company. The operating model that worked at £2m is now actively hurting you at £8m. You know it. You don’t have the bandwidth to redesign it while also running it.

You’re headed for a transition the current team hasn’t done before. A fundraise. An acquisition. An international expansion. A restructure. The weight of it is sitting on your desk because nobody else in the business has lived through it. In my case, I’ve sat on both sides of an acquisition — I sold the agency I ran into the Panoply group in 2018 and then led its integration, before becoming COO of the group and running operational due diligence on the next wave of acquisitions. Founders doing this for the first time don’t need to reinvent that playbook.

If any two of those are true, you probably need a fractional COO. If three or more are true, you needed one six months ago.

“I’d known Simon at a distance for over a decade, but only started working directly with him in 2023 — and wished I’d brought him in before. He came into the senior team at my ecommerce SaaS platform with a consummate skill at collaborative improvement. He has made a big difference in team re-directing and re-energising — and really got things done. He combines both a high emotional EQ and systemising skills, which is not so common.”
Deri Jones, Founder & CEO, ThinkTribe

What a fractional COO actually does

This is the question I get asked more than any other, and the honest answer is: it depends on what the business needs. But there are a handful of things I find myself doing in almost every engagement, because almost every scaling business I’ve seen has the same shape of problem underneath.

Installing a business operating system. Not software — a rhythm. A weekly cadence of the right meetings with the right people asking the right questions, producing the right decisions. Most scaling businesses have meetings. Very few have an operating system. The difference is whether the meetings produce outcomes or just occupy time. The way I think about this is captured in a framework I call B³, which I developed in 2023 from interviews with more than 50 scale-up founders. It’s deliberately solution-agnostic: the job isn’t to impose a playbook, it’s to work out what your business actually needs and build the right operating system with you.

Sharpening accountability. Not in the HR sense. In the operational sense: who owns what, what good looks like for the thing they own, and how often we check. When a team is drifting, it’s almost never because the people are bad. It’s because the accountability is blurred.

Redesigning how the organisation is shaped. The org chart a founder drew at £2m will usually have sedimented into something unhelpful by £8m. Functions have grown in lumps. Decisions have clumped around individuals. The lines on the chart don’t match the flows of work. Part of the job is redrawing the thing so the shape matches the purpose again.

Unblocking the founder. A good fractional COO makes the founder lighter, not heavier. That means taking things off the founder’s desk, building the structure that lets other people make the decisions the founder is currently making, and giving the founder their thinking time back.

Running the hard conversations. The ones about underperformers, about budgets that won’t stretch, about the leadership team member who was brilliant two years ago and isn’t now. These conversations need experience more than they need courage. A fractional COO has had them dozens of times before.

Being the second pair of operator eyes. Founders in scale-ups rarely have a peer inside the business. The leadership team reports to them. The board looks in from outside. A fractional COO is the thing in the middle — inside enough to be useful, outside enough to be honest.

“As a fractional executive in our leadership team, Simon designed and implemented new processes that have significantly improved our operational efficiency. Notably, he introduced our new 1:1s to enhance team engagement and helped create a new ‘lead to sale’ process for our agency. Simon is a collaborative and supportive executive in whom we had trust and confidence from the start. He listens and advises, leveraging his extensive agency and consultancy experience to build trust with the team and deliver results quickly.”
Peter O’Brien, Co-founder & Creative Director, Hidden Creative

What a typical week looks like

People always want me to describe an “average” week, so here’s my honest answer for a founder on a two-days-a-week engagement with me.

The two days in the business — usually one of those physically in the office if geography allows, one remote — running the operating rhythm, sitting in or chairing leadership meetings, working with specific team members on specific problems. Those two days are the thing the team feels. I’m in your Slack, your calendar, your decisions.

The quiet work between the days. The stuff that doesn’t happen in meetings. Reading the numbers carefully. Watching where work is getting stuck. Drafting a new decision framework. Redrawing an org structure. Preparing the conversation I’m going to have with the founder in our next 1:1.

The founder conversation. A standing weekly 1:1 plus unscheduled time when something needs my judgement that day. The conversations are about what the founder is wrestling with that week, what the business needs to decide, what’s coming down the road.

Unlimited access to me between those formal days via Slack, email and phone — because the best fractional work happens at the moment a decision needs making, not three days later at the next scheduled meeting.

That shape isn’t universal. Some engagements are heavier on redesign work and lighter on running the rhythm. Some are the opposite. But the principle holds: a fractional COO is doing the job, not reporting on the job.

Fractional vs interim vs consultant vs advisor

This is where most founders get confused, and fairly — the labels overlap and different people use them differently. Here’s how I’d draw the lines.

A fractional COO works on an ongoing basis, at a defined number of days per week or month, embedded in your leadership team as if they were a member of it. The engagement is open-ended. The success metric is: the business runs better and the founder has more room.

An interim COO does a full-time job for a short period. Usually hired when there’s a gap to plug — a COO has left, a restructure is underway, there’s a specific transition that needs a full-time operator in the seat. Interim is time-boxed.

A consultant COO is brought in for a specific project with a specific outcome. “We need to restructure operations.” “We need to land this transformation programme.” “We need to integrate this acquisition.” There’s a defined scope, a defined end. A consultant COO doesn’t run the business afterwards.

An advisor sits outside the business and gives counsel, usually in a monthly rhythm. They don’t do the work. They help the people doing the work see it more clearly. Advisors are the right tool when the founder is the bottleneck of judgement, not of execution.

Most founders who think they need an advisor actually need a fractional COO. A few who think they need a fractional COO actually need a coach. Very few people get this right on the first try — that’s why the first conversation I have with any founder is about making sure we’re agreeing on which of these shapes they actually want.

What it costs (and how it compares to full-time)

I’ll be direct, because people googling this want a number.

A full-time COO for a £5m–£15m UK business typically costs £130k–£180k in base salary, plus a bonus of 20–40%, plus equity, plus the cost of recruiting them (usually 20–30% of first-year comp if you use a search firm), plus the cost of them taking four to six months to become useful. Total cost in year one is often north of £250k, and most of that is load-bearing whether the hire works out or not.

A fractional COO engagement at one to three days a week will sit somewhere in the £5k–£15k per month range, depending on the days, the operator and the scope. No recruitment cost. No equity dilution. No four-month ramp — a good fractional COO is useful in weeks, not months. And if the engagement isn’t working, you can unwind it.

The direct cost comparison is meaningful. But the honest answer is that the cost question is the wrong question. The real question is: does a full-time COO role make sense for the stage of business you’re at?

Below about £10m revenue, most businesses don’t yet have a full-time COO’s worth of work. Hiring full-time creates a role that has to justify its own existence, which in turn creates bureaucracy the business doesn’t need. Above about £20m, most businesses have outgrown fractional — there’s too much ongoing executive load for a part-time operator to carry.

The range in between is where fractional lives. It’s exactly the range of businesses I choose to work with.

How to spot a good fractional COO

Three things I’d look for.

An operator track record, not a consulting one. The work is doing the job, not advising on it. The best fractional COOs have run operations inside businesses, carried P&L, sat on exec teams, and made hiring and firing decisions with their own names on them. A background that’s pure consulting — however prestigious the logo — is a weaker signal. I’ve run a digital agency with full P&L responsibility, co-founded an AI spin-out, and sat on the exec team of a listed group through a run of acquisitions. Those are the scars I bring to the fractional work I do now.

Experience at your stage, not three stages above you. A COO who has run operations at a £500m business is impressive, but the operational reality of a £5m business is a different job. You want someone whose pattern-matching was formed at roughly your stage of scale, because that’s the territory they’ll know how to read.

Someone who will push back on you. A fractional COO who agrees with everything you say is a very expensive mirror. You want the person who will tell you, in week three, that the thing you think is a sales problem is actually an accountability problem — and then help you fix the accountability problem.

A good fractional COO will also be clear about what they’re not. Nobody is a generalist at everything. My experience is strongest in agencies, tech-centric businesses, SaaS and professional services firms — because that’s where I’ve worked as an operator. If you’re running a hardware business or a regulated life-sciences company, there are fractional COOs closer to your world than I am, and I’ll usually tell you so.

When a fractional COO is the wrong answer

Three situations where I’d talk a founder out of hiring a fractional COO.

When the business is in genuine crisis. If the company is on fire — cash runway is days not months, a core product has failed, a key exec has just walked — you don’t need fractional. You need full-time crisis operations, either with an interim in the seat full-time or with the founder themselves treating it as their only job.

When the founder doesn’t actually want help. A fractional COO only works if the founder wants the work done and is willing to make space for it. If the founder is hiring because investors are insisting, or because they think they should, but secretly wants to keep running everything themselves, the engagement will struggle no matter how good the operator is. I’ll unpack this in the first conversation — if I don’t believe the founder is ready to transfer genuine responsibility, I’ll say so and decline the work.

When the problem is strategic, not operational. A fractional COO can absolutely help a business execute a strategy. They can’t invent one. If the thing that’s broken is that the business doesn’t know what it is or who it’s for, what you need first is a strategic process — possibly with an advisor, possibly with the board, possibly just with the founder taking time out to think. The fractional COO comes in to help execute what you’ve decided.

How I work as a fractional COO

Every fractional COO works slightly differently. Here’s the shape of mine, so you know what you’d be getting.

I only work with one business as fractional COO at a time. Depth matters more than breadth, and founders hiring a fractional COO deserve an operator whose operational attention isn’t split three ways. I might run one or two advisory or coaching relationships alongside a fractional engagement, but the fractional COO seat is a single seat.

Engagements are one, two or three days per week, embedded in your leadership team. I’m in your Slack, your meetings and your decisions. The team sees me as a member of the leadership team, because that’s what I am for the duration of the engagement.

The first 30 days are diagnostic. I get properly under the skin of the business before suggesting anything: I want to see and understand what’s working, what isn’t, where the real bottlenecks are, and what you as the founder actually need — which is often different to what you think you need. The prioritised plan comes at the end of week four, not the end of week one.

Then we install and run. The next 60 days are about installing the operating rhythm and getting the first wave of changes shipped. After that, we’re running the business together, with me gradually handing more of the rhythm back to the team as the structure holds.

I work through the B³ framework®. It’s the shared language I use for what we’re building: founder(s) + leadership + business operating system → growth. Don’t chase growth — do the right things and growth will come.

If that sounds like the shape of the thing you need, the next step is a conversation — not a pitch, a diagnostic conversation about what’s going on in your business and whether this is the right tool for it.

Frequently asked questions

How quickly can a fractional COO start?

Usually within two to four weeks of a first conversation, depending on how much scoping the engagement needs. A good one won’t promise tomorrow — they’ll want to diagnose first.

Can a fractional COO become full-time later?

Occasionally, but it’s rare and I’d be cautious. The skills that make someone a great fractional operator aren’t always the same skills that make someone a great full-time exec in a single company. Plan the engagement on its own terms.

Will a fractional COO replace my leadership team?

No. They work with your leadership team, sharpen its rhythm, and sometimes help you see who’s working and who isn’t. The goal is to make the team you have more effective, not to replace it.

Do I need a fractional COO if I already have an ops lead?

Maybe, maybe not. If your ops lead is strong and just needs air cover to make harder decisions, an advisor might be a better fit. If your ops lead is running the day-to-day but the executive layer above them is missing, a fractional COO is the layer that’s missing.

The fractional COO guide: when to hire one, what they actually do, and how it works