# What is a fractional CTO? Source: https://www.plutonapps.com/resources/what-is-a-fractional-cto Published 2026-09-30, updated 2026-10-24, sources checked 2026-10-24. By Faysal Par (https://www.plutonapps.com/authors/faysal-par). **Fractional CTO:** A fractional CTO is an experienced technology leader who works for a company part time to set technical direction: architecture and stack, reviews of what has been built, engineering hiring and advice to founders and investors. It gives a startup senior judgment without a full-time executive salary, often for a few days a month. Also known as: Part-time CTO, CTO as a service. Strategy by the day. Useful, and often confused with the engineering work it does not include. ## Does a fractional CTO write the code? A founder with an AI-built prototype often needs two things at once: someone to decide what should happen technically, and someone to do it. A fractional CTO covers the first. They will tell you the app needs [row-level security](https://www.plutonapps.com/resources/what-is-row-level-security), tests and a [staging environment](https://www.plutonapps.com/resources/what-is-a-staging-environment); they usually will not write them. ## When is hiring a fractional CTO the right call? A fractional CTO is the right call when you need direction rather than delivery: before a fundraise, to review the product and answer investors' technical questions; when you are about to hire engineers and need someone to judge them; or when you already have a team or supplier and need an independent view of their work. - Before a fundraise, to review the product and answer investors' technical questions. - When you are about to hire engineers and need someone to judge them. - When you have an engineering team or supplier and need an independent view of their work. If what you need is the work itself, the architecture decisions and the engineers who carry them out, that is what a product engineering team or subscription provides. ## What does direction look like when it comes with delivery? Direction that comes with delivery means the architecture decisions and the engineers who carry them out arrive together. A fractional CTO could have written Bell's decisions down, but someone still had to carry them out. When you need both halves, budget for the engineers as well as the advice, not the advice alone. > **What we see in practice** Bell, an AI email assistant for Gmail, shows the kind of call a CTO makes. The founder's Lovable proof of concept had 143 database tables and a security review covering about 12 of them. The decisions were to rebuild on 47 tables, to ask Gmail for exactly two permissions, read and send, and to make the database refuse any send a person had not asked for or approved. Bell's staging build took 27 working days and 285 merged pull requests, with more than 13,000 automated tests. The full story is in the [Bell case study](https://www.plutonapps.com/work/bell). ## How do companies usually engage a fractional CTO? Usually as an outside contractor on a retainer or a fixed number of days, not as an employee. The IRS says whether someone is a contractor depends on the business's right to direct and control the work, judged on behavioral, financial and relationship evidence, with no single factor deciding it. Write the scope down either way. Experience is the point of the role. The US Bureau of Labor Statistics notes that chief technology officers and other senior IT managers usually need many years of experience. A useful first piece of work is often an independent [code audit](https://www.plutonapps.com/resources/what-is-a-code-audit): it gives the fractional CTO evidence, and gives you a written view of where the product stands. ## What mistakes do founders make with a fractional CTO? The biggest mistake is expecting delivery from a role built for direction. Others, in our experience, are leaving the scope unwritten, giving the fractional CTO no access to the code or accounts, and treating their recommendations as done once they are written down. Advice only changes the product when someone carries it out. - Agree what decisions they own and which they only advise on. - Give them read access to the repository, database and hosting, in your company's name. - Ask for written recommendations with an owner and a date for each. - Decide in advance who will implement them, in-house, a contractor or a team such as our [vibe coding rescue](https://www.plutonapps.com/services/vibe-coding-rescue) service. ## Frequently asked questions ### What is the difference between a fractional CTO and a CTO? Scope and time. A full-time CTO leads the engineering team every day. A fractional CTO advises part time and rarely manages day-to-day delivery. Many startups use one until they can justify a full-time CTO, and then ask the fractional CTO to help hire that person. ### Is a fractional CTO an employee or a contractor? Usually a contractor, but the label in the contract does not settle it. The IRS looks at the whole relationship: how far the business controls the work, how the worker is paid and equipped, and whether the arrangement looks permanent. Check with an accountant if unsure. ### How much time does a fractional CTO spend with a company? It varies with the engagement. Many work a few days a month, sometimes more around a fundraise or a hiring round. Agree the time in writing, along with what they will produce in it, such as a review, an architecture decision record or interview scorecards. ### Does a fractional CTO replace a development team? No. A fractional CTO sets direction and judges work, but usually does not write the code, run releases or answer incidents. Most startups that hire one still need engineers, whether employees, contractors or a development subscription, to turn those decisions into working, tested software. ## Read next - [How to hire a Lovable developer (and what it costs)](https://www.plutonapps.com/guides/hire-a-lovable-developer) - [Plans and pricing](https://www.plutonapps.com/pricing) ## Sources - [IRS: Independent contractor (self-employed) or employee?](https://www.irs.gov/businesses/small-businesses-self-employed/independent-contractor-self-employed-or-employee) - [U.S. Bureau of Labor Statistics, Occupational Outlook Handbook: Computer and Information Systems Managers](https://www.bls.gov/ooh/management/computer-and-information-systems-managers.htm)