Fractional CTO: What They Do, Cost, and When to Hire One

"Fractional CTO" has become the title people put on their LinkedIn profile when "senior developer" doesn't sound senior enough. I play this role for some of my clients, so I have opinions about what it actually means — and what it doesn't. The confusion isn't just semantics. If you hire the wrong thing under this label, you pay consulting rates for work that a good contractor would have done better. The Problem with the Label The term covers a surprisingly wide range of people and arrangements. At one end, you have experienced technical leaders — people who have actually run engineering organizations, made architectural decisions that constrained companies for years, hired and let go technical staff, and owned the consequences. At the other end, you have developers who decided their day rate felt more justifiable with a fancier title. Both call themselves fractional CTOs. The market hasn't sorted this out yet. The reason it matters: these are fundamentally different services with different prices, different deliverables, and different risks. Mixing them up is how companies end up paying €200/hour for someone to help them choose a JavaScript framework. What a Real Fractional CTO Actually Owns Owns is the operative word. Not "advises on." Not "contributes to." Owns. Technical architecture decisions. When you're building a system that will handle real volume, real users, and real money — the decisions made in the first few months constrain everything that follows. What database, what caching strategy, how the services are separated, where the complexity lives. A fractional CTO makes those calls and stakes their reputation on them. They're not writing a report about options. They're deciding. Tech stack and vendor selection. When a vendor pitches you something, someone needs to evaluate it who has seen enough vendors to know which ones are overselling. When a developer suggests a library, someone needs to know whether it's the right tool or just the tool that developer