A plain explainer
What is a fractional CTO?
An experienced engineering leader who takes the chief technology officer role part-time, and owns the outcome.
A fractional CTOis a seasoned engineering leader who serves as a company's chief technology officer on a part-time basis, typically one to three days a week, often across more than one company. You get senior technical leadership, strategy, and accountability without the cost or commitment of a full-time executive hire.
The word fractional describes the time commitment, not the seniority. A good fractional CTO brings the same depth of judgment a full-time CTO would, focused on the decisions that matter most.
What does a fractional CTO actually do?
The role concentrates on a few high-leverage areas:
- Technical strategy and roadmap. Sequencing the work by what unblocks the business, and making it legible to both the team and the board.
- Architecture decisions. The handful of choices that are expensive to reverse, made deliberately rather than by default.
- Hiring and team design. Who to hire next, how to interview for it, and how to structure the team to ship sustainably as it grows.
- Board and investor fluency. Technical diligence, board materials, and the honest engineering story investors need.
When does a company need one?
The most common moment is between seed and Series B: there are engineers shipping, but no senior technical leader to set direction. The founder is making architecture and hiring calls outside their depth, and a full-time CTO is either not yet justified by the stage or not yet findable. A fractional CTO closes that gap, and frequently helps define and hire the eventual full-time role.
How is it different from a consultant or a full-time CTO?
A consultant produces recommendations and leaves. A fractional CTO embeds in the team, makes decisions, is accountable for them, and stays long enough to see them through. Compared to a full-time CTO, the difference is time and cost: you get the same caliber of judgment across the decisions that matter most, at a fraction of the commitment, until the role clearly justifies a full-time hire.
What does it cost?
Most fractional CTO engagements are structured as a recurring monthly retainer tied to a set number of days per week. That tends to land well below a full-time CTO's total compensation, with none of the equity refresh or severance overhead. The exact figure depends on the time commitment and the length of the engagement.
This is the work I do through M. Littlehale & Co. If you think you might need a fractional CTO, you can read more about how I run those engagements or get in touch directly.