Short answer: a fractional CTO is a part-time chief technology officer, a senior technical leader who works for you a set number of hours a month. You need one when real money or real customers depend on your software and nobody on your side can judge the technical decisions. For one decision or a small first version, you don't: a consultation, or AI agents plus an expert review, cost far less. Market guides put it at $2,500 to $12,000 a month for advice and $10,000 to $30,000 for hands-on work.
What a fractional CTO does
A CTO, chief technology officer, owns the technical side of a business: what gets built, how, by whom and for how much. A fractional CTO does that job part-time, often for several companies at once. Other names you'll see:
- Part-time CTO: the same thing in plainer words.
- CTO as a service: usually the same role, sold by a firm rather than one person.
- Interim CTO: close to full-time, for a fixed period, for example while you hire a permanent CTO or after one leaves.
Day to day, the work comes down to five things:
- Decisions. What to build on, what to buy instead of build, which agency to trust, and what can wait.
- A plan with a budget. Your business goals turned into technical steps, each with a cost you can check.
- The team. Reviewing what developers or an agency deliver, setting the rules for testing and releases, and hiring engineers.
- Risk. Security, backups, customer data, and a plan for the night the app goes down.
- Investors. Answering their technical questions and preparing for due diligence: the check investors run on your tech before they put money in.
A typical week: a call with you, a review of the team's work, and decisions written down.
When you need a fractional CTO
Signs it's time:
- You're about to sign an agency quote or hire a team, and you can't tell whether the plan and the price make sense.
- You already have developers, but deadlines slip, old bugs come back, and nobody can tell you why.
- Your app works as a demo, and you're about to put paying customers, payments or personal data on it.
- Investors ask technical questions you can't answer, or due diligence is coming.
- You need to hire your first engineers and can't judge their interviews.
- Every technical decision waits for you, and you're guessing.
If two or more of these are true, get senior help. One wrong hire or one app built twice costs more than months of advice.
When you don't need one
A fractional CTO is a monthly cost. Often you need less, and I'd rather you paid for less:
- One question, one decision: a consultation. Is this quote fair? Is my demo safe to launch? One focused hour and a written summary of next steps can settle it.
- A technical co-founder. If someone owns the tech with you full-time, for a share of the company, you don't need a part-time CTO on top.
- AI agents plus a periodic expert review. For a small first version, AI agents now do much of a team's work: my own build times fell from a month to two days. Follow a clear framework, like my free MVP System Design playbook (16 chapters, MIT licence: free to use and change). Check the basics with the production-ready checklist, then pay an expert to review the app before launch, the first payment and the first investor.
- A developer. If you need code written every day, hire a developer or an agency. A CTO who only writes code is an expensive developer.
And if you haven't checked that people want your product, do that first. No CTO can fix a product nobody wants.
What a fractional CTO costs
There is no official price list. The figures below come from companies that sell fractional CTO services or place fractional CTOs, so treat them as rough benchmarks, not quotes. Sources, read on 7 November 2026: A.Team, Arc (which quotes rate data from GoFractional and CTAIO) and Pangea.ai.
| What you buy | A.Team | Arc | Pangea.ai |
|---|---|---|---|
| Advice, per month | $4,000–$10,000 for 10–15 hours | $5,000–$12,000 for 8–16 hours | $2,500–$5,000 for 5–10 hours |
| Hands-on, per month | $10,000–$25,000 for 20–40 hours | $15,000–$30,000 for 40–96 hours | $10,000–$25,000 for 20–40 hours |
| Interim, close to full-time, per month | $20,000–$40,000 | — | — |
| Per hour | — | $150–$250 in the US, $200 median | $200–$500, by experience |
| Full-time CTO, first year | $325,000–$490,000, excluding equity | $415,000–$664,000, before equity | $375,000–$555,000 |
Put simply: $2,500 to $12,000 a month for advice, $10,000 to $30,000 for hands-on leadership, and from $325,000 for a full-time CTO's first year. A.Team's and Arc's full-time figures are for a US startup after its first big funding round.
What moves the price: the hours, how hands-on the work is, where the person lives (Arc lists $300 to $500 an hour in San Francisco and New York, $150 to $275 in Eastern Europe), and specialist fields like AI, fintech or regulated industries. Some take part of the fee in equity, a share of your company.
How to choose a fractional CTO
On the first call, I'd ask these six questions:
- What have you built or run that looks like my business? Ask about live products with real customers, and what happened to them. Names may be under NDA, a confidentiality agreement; the story shouldn't be.
- What will you do in the first 30 days? A good answer starts with looking: the product, the code, the team, the bills. Then a written list of risks and a plan in order.
- How many hours a month do I get, and how fast do you answer when the app is down? Ask how many other clients they have, too.
- Will you write code, or lead the people who do? Either can be right, if it matches what you need.
- How will we both know it's working? Agree on results you can see: releases on time, a hiring plan, a security review done.
- What happens when we stop? Decisions written down and a handover, so the next person doesn't start from zero.
And the red flags:
- The code, servers, domain or app store accounts would sit in their name. Everything must belong to your company.
- They push their own agency or a favourite vendor without comparing options. Then they earn twice: on the advice and on the build.
- They promise results before they've looked at anything.
- They can't explain a technical choice in plain words.
- They want a long contract with no easy way out.
- They never ask about your customers, your revenue or your deadline.
What to prepare before the first call
An hour goes further when the basics are on paper. Bring:
- One page about the business. What it does, who pays, how it makes money, and the goal for the next 6 to 12 months. If the product is still an idea, turn it into a spec first.
- What exists today. A link to the product or demo, who builds it, and what you pay each month for tools and hosting.
- A list of accounts and their owners. Domain, code, hosting, app stores, payments. Names and owners only, never passwords. If one is in someone else's name, that's the first thing to fix.
- The decision you face, and its deadline. A launch, a fundraise, a contract to sign. Bring the quotes, contracts and investor questions behind it.
- Your budget. A rough number. It decides which option on this page fits.
Where to start
I've spent 15 years in software, and I'm CTO at DeVmand; before that I held CTO and Head of Engineering roles at other companies. I offer consultations, MVP builds and fractional CTO help: tech strategy, architecture and the dev team, without a full-time hire.
If you're not sure which you need, start with a consultation. In an hour we'll know whether you need a build, ongoing leadership, or neither. Often the answer is simpler than you think.
All guides: articles.