Leadership advisory
Fractional, full-time, or interim CTO?
Cost, commitment, and the decision signals that point toward each model. Straight answers for founders and boards choosing between the three.
TL;DR
- A fractional CTO costs €5k to €18k per month and suits companies that need strategic ownership but cannot justify a full-time hire yet.
- A full-time CTO costs €180k to €250k per year in Germany and makes sense once engineering is a core competitive function with a team to lead.
- An interim CTO is a short-term fix: typically three to nine months, used for a specific transition (departure, fundraise, replatform).
- The wrong choice is usually premature: hiring full-time before the role has enough strategic surface, or using interim as a way to avoid the fractional conversation.
- Read how we deliver strategy and advisory engagements for companies at different stages.
What each model actually means
Three models, three different answers to the question of who owns technology decisions.
A fractional CTO works part-time, usually one to three days per week, over a sustained period. They own technology strategy, vendor decisions, architecture direction, and engineering leadership accountability, without being a full-time employee. The engagement runs as a monthly plan or day-rate arrangement and can be scoped up or down as the company grows.
A full-time CTO is a permanent hire who sits at the leadership table five days a week. They own the full engineering function: hiring, budgets, roadmap, architecture, and board-level technology representation. The role justifies itself when the engineering organisation is large enough and complex enough to need that level of dedicated attention.
An interim CTO is a temporary placement, typically used to cover a gap: the existing CTO has left, a major technical transition needs leading, or the board needs someone credible in the seat during a fundraise or acquisition. Interim arrangements usually run three to nine months and end with either a permanent hire or a handoff to a fractional arrangement.
A fractional CTO owns technology strategy, vendor decisions, architecture direction, and engineering leadership accountability, without being a full-time employee.
Side-by-side comparison
Cost, commitment, and fit at a glance.
| Dimension | Fractional CTO | Full-time CTO | Interim CTO |
|---|---|---|---|
| Typical cost (Germany) | €5k–€18k/month | €180k–€250k/year + equity | €1,500–€2,500/day |
| Time commitment | 1–3 days/week | 5 days/week | Full-time, fixed term |
| Typical duration | Ongoing plan | Permanent | 3–9 months |
| Notice / exit | Monthly, low risk | 3–6 month notice period | Fixed end date |
| Best fit | Pre-scale: strategy without full headcount | Post-product-market fit, growing team | Gap coverage, transition, fundraise |
| Main risk | Limited availability in a crisis | Over-hire before the role is needed | Continuity after they leave |
| Equity required | Rarely | Almost always | Rarely |
| Time to mobilise | 2–3 weeks | 3–6 months | 2–4 weeks |
At a glance
- 5,000–18,000€
- Monthly cost of a fractional CTO engagement in Germany, for one to three days per week.
- 180,000–250,000€
- Full-time CTO annual salary in Germany, before employer contributions and equity.
- 2–3
- Weeks to mobilise a fractional CTO, versus three to six months for a full-time hire.
Next step
Get a second opinion on: Fractional vs full-time vs interim CTO
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Decision signals
Choose the model that matches your current decisions and team size.
Choose fractional when technology is strategic but the team is still small
You need someone to own the technical roadmap, push back on vendors, and represent technology at board level. But you do not yet have a 10-person engineering team that needs daily management. A fractional CTO gives you strategic ownership at a cost that matches your current scale.
Choose full-time when engineering is a core competitive function
When the product is technology, when the engineering team is large enough to need daily leadership, and when technology decisions are made every hour not every week, a full-time CTO earns back the cost. The rule of thumb: once you have 15 to 20 engineers or technology is genuinely your moat, the full-time conversation makes sense.
Choose interim when you have a specific gap with a defined end
The CTO just left. A major replatform starts in six weeks. The Series B process requires a credible technical face in meetings. Interim is the right tool when the need is concrete, bounded, and temporary. Do not use it as a way to delay a permanent or fractional decision indefinitely.
Beware premature full-time hires
The most common mistake is hiring a full-time CTO at €200k before the role has enough strategic surface to justify the cost. The result is a mis-scoped leadership hire spending their days in Jira. A fractional engagement first tests whether the company actually needs that level of continuous coverage before committing to the salary.
Common questions
What founders and boards actually ask.
What is the difference between a fractional CTO and an interim CTO?
Duration and intensity. An interim CTO is full-time for a short, defined period, typically three to nine months, covering a gap or transition. A fractional CTO works part-time on an ongoing basis, owning strategy without the full-time headcount cost. Interim is temporary. Fractional is a deliberate operating model.
When is it too early to hire a fractional CTO?
If you have fewer than five people and the technical decisions are all about basic product build, you probably need a lead engineer first. The fractional model earns its cost when there are vendor decisions, architecture choices, hiring calls, and board-level technology conversations that need a dedicated owner.
How much does a fractional CTO cost in Germany?
Day rates typically run €1,200 to €2,200 per day in Germany. Monthly retainers for one to three days per week work out to €5,000 to €18,000 per month depending on complexity, sector, and scope. Compare that to a full-time CTO hire at €180,000 to €250,000 in salary alone, before employer contributions and equity.
Can a fractional CTO replace a full-time CTO permanently?
For many SMEs, yes. Companies with 5 to 50 people in non-engineering sectors often find that two days per week of strategic technical leadership is exactly what the role requires. The question to ask is: does the company need someone making technology decisions continuously every day, or does it need sharp, accountable strategic ownership a few days a week?
What should I look for when hiring any type of CTO?
Clear accountability for technical decisions. Someone who will flag a bad brief before work starts and explain the commercial trade-off. Evidence of commercial judgment: can they explain what a past technical decision cost or saved? And a clear scope: what exactly are they owning and what does the exit or handoff look like? Read the fractional CTO guide for the full question list.
Is equity required for a fractional or interim CTO?
Rarely. Most fractional and interim CTO arrangements are cash engagements with no equity component. Full-time CTOs almost always expect equity as part of the package. If an advisor is asking for significant equity on a part-time arrangement, clarify what exactly they are delivering in return.
How we approach this at Some Tech Work
We scope the gap before we name the model.
Most companies come to us with a job title in mind. We start from the decisions that are currently stuck: We start with the decisions that are currently not getting made: vendor choices left unresolved, architecture questions nobody owns, investor conversations where technology is a weak spot. From that, the right model usually becomes obvious. We run strategy and advisory engagements as fractional arrangements, fixed-scope projects, or hybrid retainers, depending on what the company actually needs.
If the gap is a permanent full-time hire, we will tell you that upfront and help you scope the role correctly before you start interviewing. If the gap is interim coverage while you search, we can bridge that too. The point is to match the model to the problem your team faces this quarter. When the open question is whether you need a tech audit before any hire, use the free technical audit decision memo to write the decision first.
Written by
Vineet Talwar
Co-founder, Tech & Operations at Some Tech Work. WordCamp speaker across Europe and Asia, and host of the WP Shoutout podcast.
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