Your CTO left six months ago. You haven’t hired a replacement yet. Not because you don’t want to, but because a senior full-time CTO costs €150,000 a year — and you’re not sure you need one at that level.
In the meantime, technical decisions are piling up. Your lead dev is doing their best. They weren’t hired for this. You’re making decisions by default — the ones nobody has formally validated — on a stack held together with duct tape.
That’s precisely the situation the fractional CTO model is designed to address.
What it actually is — and what it isn’t
A fractional CTO isn’t a senior IT contractor who delivers documentation. It’s not a consultant who spends two days on-site, hands over a report, and disappears.
It’s a decision-making role.
Concretely: someone who takes responsibility for the strategic tech matters of your business, within a defined scope, for a defined period — without being on your payroll. They attend your leadership meetings, speak to your board on technical topics, recruit and evaluate your technical profiles, and arbitrate architecture decisions.
The difference with a contractor is simple: a contractor responds to requests. A fractional CTO defines what needs to be done and takes ownership of the outcome.
The difference with an employee is equally simple: no social charges, no trial period, no long-term commitment if it doesn’t work. And above all — they’ve seen dozens of companies in situations similar to yours. An internal CTO recruited from scratch learns on the job. A fractional CTO brings that reference frame from day one.
Who it makes sense for
There are a few situations where this model answers the problem precisely.
The CEO without a CTO. The company has grown. There’s a team of 5 to 20 developers, but nobody is steering the technical vision. Architecture decisions are made ad hoc. Technical debt accumulates. The CEO does their best but doesn’t have the technical authority to arbitrate disagreements within the team.
After the CTO leaves. The founding CTO has left. They took a lot of context with them. There’s urgency to stabilize, document, restructure the team. Hiring a new CTO takes six months. A fractional CTO can hold the position through the transition — and prepare for the permanent hire.
Fundraising or due diligence. Your investor wants to understand your stack, your technical risks, your roadmap. You need someone who can speak their language, defend your choices, and honestly identify what’s fragile.
Rapid growth. The architecture that worked at 10,000 users doesn’t hold at 100,000. Developers spend more time fixing regressions than shipping features. You need to regain control — architecture, processes, team organization — without stopping everything.
CTO already in place, but underwater. They’re good. They handle incidents, recruiting, meetings, the roadmap, business requests. They don’t have an hour to think anymore. Strategic decisions pile up — or get made too fast. A fractional CTO isn’t there to replace them, but to give them the strategic support they no longer have time to provide alone.
These five situations share one thing: you need C-suite-level technical decision-making capacity, not more hands in the team. That’s where the model makes sense.
Who it doesn’t make sense for
The model doesn’t work in every case. A few situations where declining or redirecting is more honest.
Too early. Fewer than 5 developers, no stable paying customers yet, product not yet validated. At this stage, what you need isn’t technical leadership — it’s finding product-market fit. A fractional CTO can’t accelerate that.
The wrong ask. “I need someone to manage the team day-to-day.” The daily operational work — standups, ticket follow-up, pair programming — is out of scope. That role is an Engineering Manager, not a CTO. The confusion between the two is common. It’s expensive if it persists.
The organization is too large. Beyond 200 developers, the organization typically needs an internal CTO present full-time, with a team of technical vice presidents. A fractional CTO can bring useful external perspective, but can’t hold the role in the full sense.
The need is delivery, not strategy. “We have a big migration project to complete.” That’s an architecture project or an Architecture Sprint — not a fractional CTO engagement. Both are different, both have value, but conflating them creates misaligned expectations.
What it looks like in practice
On a typical fractional CTO engagement, the actual activities look like this.
At the start: audit of the existing system, mapping of technical debt, interviews with the team, identification of priority risks. Not to produce a report — but to establish a shared factual starting point.
In steady state: defining and maintaining the technical roadmap, arbitrating architecture decisions (which framework, which infrastructure, how to decompose the monolith), recruiting and evaluating technical profiles (leads, seniors, internal CTO), managing vendors and agencies, participating in leadership meetings and investor conversations on technical topics.
Continuously: alignment between what tech can deliver and what the business needs. That’s the real value of the role. Not “the devs” on one side and “the business” on the other — a permanent bridge, translated in both directions.
What’s not included: operational development, day-to-day project management, pair programming. Not because those activities have no value — but because they call for different profiles.
What it costs
The question deserves a direct answer.
From €8,000/month, on a minimum 6-month engagement. That’s the floor, for roughly 1.5 days per week. The standard level — 2 days per week — sits between €12,000 and €13,000/month.
For comparison: a senior salaried CTO costs between €120,000 and €180,000 per year in total employer cost. And still takes six months to recruit, six months to get up to speed on your context — and leaves with all the accumulated context on the day they go.
The fractional model isn’t “cheap”. It’s right-sized — you pay for the decision-making capacity you need, when you need it, without the fixed costs and risks of a full hire.
If the available budget is below €8,000/month, the right next step is usually an Express Diagnostic (€3,500, 2 days, deliverable within 48h) — to map the problem precisely before deciding what comes next.
Does your situation match one of these?
The details of the engagement — scope, cadence, duration — are on the dedicated page. With the FAQ and the cases where it doesn’t make sense.
The real question
Most CEOs I meet aren’t asking “do I need a fractional CTO.” They’re asking “can I still afford not to have one.”
Every month without technical leadership is decisions made by default that will be costly to undo. It’s a debt that doesn’t show up in the accounts but slows everything down.
You can’t solve strategic problems with more developers. You solve them with better decisions. That’s what a fractional CTO does.
Not sure yet what you need? The Express Diagnostic is made for that — two days, a written deliverable, a clear recommendation on next steps. It’s often the right starting point before a long-term engagement.