Choosing the right technology leader
Fractional vs interim vs full-time: which technology leader do you need?
A fractional executive works part-time on an ongoing basis, giving you senior leadership a few days a month. An interim executive works full-time but temporarily, filling a gap or leading a transition. A full-time executive is a permanent hire. The right choice depends on whether your need is ongoing but partial, urgent but temporary, or permanent and full.
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The three models at a glance
The fastest way to see the difference is side by side. This uses a CTO as the example, but the same logic applies to a CIO, CISO, or any senior technology leader.
| Fractional | Interim | Full-time | |
|---|---|---|---|
| Commitment | Part-time, ongoing (days per week or month) | Full-time, fixed term | Full-time, permanent |
| Duration | Ongoing, flexes with need | Weeks to months, defined end | Indefinite |
| Cost model | Day rate or monthly retainer | Full-time rate for the term | Salary + NI + pension + benefits + equity |
| Best for | Senior leadership you need continuously but not full-time | A gap, a departure, or a specific transition to lead | A permanent role where technology is core |
| Typical use case | Scaling business needing CTO judgement a few days a month | Covering a sudden exit, or leading a rebuild or integration | Large or technology-led business needing a full-time owner |
| Speed to start | Fast, often within weeks | Fast, built for urgency | Slow, months to recruit |
| You pay for | Only the time you use | Full time, for a fixed period | All of their time, permanently |
What is a fractional executive?
A fractional executive is an experienced senior leader who works with your business part-time on an ongoing basis, typically a set number of days each week or month. You get the judgement and track record of a proven operator, scaled to what you actually need and without the cost of a full-time hire.
Fractional fits when the need is real and continuous but does not fill a full week.
A scaling business often needs genuine CTO-level judgement in the room, but not forty hours of it.
Fractional matches the cost to the need, and the commitment flexes up during intensive periods and back down as things settle. Explore the roles we place fractionally: CTO, CIO, CISO, Chief AI Officer, and IT director.
What is an interim executive?
An interim executive is a senior leader who works full-time but for a defined, temporary period. Unlike a fractional leader, an interim is usually all-in for the duration, embedded five days a week, but only until the specific job is done.
Interim fits when the need is urgent and full-time but temporary. Common triggers are a sudden departure that leaves a leadership gap, a transformation or integration that needs dedicated leadership for a set stretch, or cover during a search for a permanent hire.
The defining features are full-time commitment and a clear end date. When the transition is complete or the permanent hire arrives, the interim moves on.
When full-time still makes sense
Sometimes the honest answer is a permanent, full-time hire, and it is worth being clear about when.
If technology is the core of your business and demands a full week of senior leadership every week, indefinitely, a full-time executive is the right call. The same is true if the role needs deep, continuous immersion in your culture and team that only a permanent presence provides, or if you are large enough that the fully-loaded cost of a full-time hire is comfortably justified by the workload.
The mistake most scaling businesses make is not avoiding a full-time hire. It is making one too early, committing to a six-figure salary plus equity before the workload genuinely fills the week. Fractional and interim exist precisely for the stage before that point, and often for a good while into growth.
Which do you need?
A simple way to decide is to answer one question first: is your need ongoing, or temporary?
If the need is ongoing but not full-time, fractional is almost always the answer. You want senior judgement in the business consistently, but the work does not fill a full week. Example: a scaling company that needs a CTO to own the roadmap and lead the team a couple of days a week.
If the need is urgent, full-time, but temporary, interim fits. You have a gap to fill or a transition to lead, and you need someone all-in until it is done. Example: your CTO leaves suddenly and you need experienced hands on the tiller while you search for a permanent replacement, or through a critical migration.
If the need is permanent and genuinely full-time, hire full-time, but be honest that you are truly at that stage. Example: technology is the heart of the business and there is more than enough senior work to fill every week, indefinitely.
For most UK mid-market scaling businesses, roughly £2M to £30M, the honest answer is fractional for ongoing leadership and interim for temporary gaps, with full-time coming later than founders often assume.
How Boardman helps
We place both fractional and interim technology leaders, so we are not trying to sell you one model regardless of fit. We start from what you actually need and match accordingly.
Every leader on our bench is a practitioner who has led at scale, not a career consultant. We focus on the UK mid-market, so the people we place understand your stage and your pressures. Whether you need ongoing fractional leadership or an interim to lead a transition, we match you to the right person fast, usually within weeks, and stay involved to make sure it works.
If you are not sure which model fits, that is exactly the kind of thing a short call sorts out.
Frequently Asked Questions
What's the difference between a fractional and an interim executive?
Is an interim executive full-time?
When should I hire interim rather than fractional?
Which is cheaper?
How quickly can each one start?
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