Fractional CTO or your first senior hire?
You need senior technical judgement. Whether you need it full-time is a separate question.
Fractional while the decisions are architectural and periodic. Full-time once there is a team to lead daily and a roadmap that needs continuous ownership.
A common position: you have developers, or an agency, and nobody senior enough to tell you whether what they are doing is sound. Decisions get made by whoever is most confident, and you find out how good they were about a year later.
The instinct is to hire a CTO. That is sometimes right and frequently premature — a strong CTO is expensive, hard to attract without an interesting problem, and difficult to assess when you cannot evaluate the skill you are buying.
What each is actually for
Fractional works when
- Decisions are architectural and periodic
- You have builders but no technical owner
- You need vendor and agency work assessed
- The team is small enough to lead part-time
- You cannot yet evaluate a CTO candidate
Hire full-time when
- There is a team needing daily leadership
- Technology is the product, not support for it
- Hiring and growing engineers is now the job
- Decisions arrive continuously, not monthly
- You are raising money and investors expect it
What fractional should not become
The failure mode is dependency. If a fractional arrangement is still running unchanged after two years, either it has quietly become a part-time staff role, or nobody internal has grown into the responsibility — and both are worse outcomes than the arrangement was designed to avoid.
A fractional engagement should be making itself smaller: decisions documented so they do not need re-explaining, standards set so ordinary work does not need review, and where you have a team, someone being deliberately developed to take it over. Ask any prospective fractional CTO what their exit looks like. A vague answer is informative.
The right measure of fractional leadership is that you need less of it each year, not that it has become indispensable.
Fractional CTO — questions we get asked
How much time does fractional actually mean?
Commonly a few days a month, concentrated around decisions, reviews, and vendor oversight rather than spread thinly. What matters is availability when something is being decided, not hours on a timesheet.
Can a fractional CTO manage our agency?
Yes, and it is one of the clearer returns — someone who can read the work, challenge estimates, and tell you whether what is being delivered is sound usually pays for themselves on that alone.
What happens when we hire full-time?
The handover should be planned rather than abrupt: documented decisions, context transferred, and a period of overlap. If that is difficult, the arrangement was not set up well.
The work this leads to
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Still weighing it up?
Most of these questions are quicker to settle in a conversation than in an article — particularly the ones where the answer depends on your numbers.