TL;DR: A fractional CTO costs about $2,000 to $5,000 a month. They work for several firms at once. A full-time senior engineer costs $180,000 or more a year. Salary alone. That is before equity and benefits. A full-time hire works only for you. A fractional CTO fits a founder who needs senior judgment now and then. Not daily code work. Not five days a week of hands-on coding. A full-time hire fits a firm with enough work. Enough to fill one week. Most solo or two-founder AI-built startups need the fractional model first. That holds for any SaaS product, website, or app. Any product that has not earned a full team yet.
The real trade-off is calendar time, not just cost
Founders often treat this as a budget question. Can we afford a full-time hire yet? That question skips a better one. How much senior tech work does the firm make each week?
A solo founder rarely has 40 real hours of senior work. Not each week. They have a few calls that matter a lot. How the database is set up. Whether user data stays private. What happens when a payment fails. What to say on a buyer's form. Each one needs real judgment. None needs someone at a desk five days a week.
A fractional CTO fits that shape of work. They show up for a set number of hours a month. They review what matters. They leave daily coding to the founder or a contractor. A full-time engineer fits the opposite shape. Steady, full-week work on one codebase. Day after day.
Pick the wrong shape and you waste money either way. A full-time hire with three hours of real work a week gets bored. They leave fast. A fractional CTO asked to ship daily features for free burns out. Fast.
What a fractional CTO for startups actually does
It helps to see the real gears. Not a sales pitch. Here is how ours works. The file names are real. You can check them.
- A customer starts a Growth Retainer or a DFY Technical Setup. Our system builds a work package. It assigns an available CTO (
code-care.js:82,assignCTO). That CTO owns the account from there. - The DFY Technical Setup covers a fixed list. Auth hardening. Database row-level security. API security. Rate limiting. Security headers. Error tracking. Monitoring. Secrets management. Environment config. Each item maps to a real check in our own code. Our monitoring scanner, at
monitoringScanner.js:13, checks one thing. Does an error-tracking script run on the live site at all? That gap is often the first thing a new customer is missing. - Nothing reaches a customer without a human sign-off. Our own code says it plainly.
code-care.js:3— “NEVER auto-delivers — everything goes throughqueueForApprovalfirst.” That function sits atcode-care.js:212. It locks each deliverable to a pending state. It sends a review alert first. - Every code change goes out as a pull request. Never a direct push to production. The customer approves each one before it merges.
That is the real shape of the work. A named person reviews design and risk calls on a schedule. A fixed checklist backs it up. An approval gate sits in front of every delivery.
What a full-time engineer costs and covers
A full-time engineer brings real strengths a fractional setup cannot match. They know one codebase deeply, day by day. They can ship features all week. Not just review them. They sit in each planning talk. Not just a set check-in.
Those strengths cost real money. A senior engineer in the US often starts near $180,000 a year. Base pay alone. It can run past $220,000 in tight markets. Add payroll tax, perks, and gear. The all-in cost runs 25 to 35 percent above base pay. Hiring itself takes time too. Finding and closing a strong senior hire takes time. Often six to twelve weeks. Sometimes longer.
There is a quieter cost too. A founder's first hire is often their first time managing anyone. Judging a risky design call. Judging a risky shortcut. Judging if a new hire is truly senior. All of that takes experience a new founder may not have yet. A fractional CTO can sit next to that first hire. They review calls the way a boss would. The firm avoids paying for two full salaries.
Fractional CTO vs full-time engineer, side by side
| Question | Fractional CTO | Full-time senior engineer |
|---|---|---|
| Typical monthly cost | $2,000–$5,000, or a fixed fee | $15,000–$20,000+ all-in |
| Time commitment | A set number of hours or days a month | 40 hours a week, one company |
| Time to start | Days to a couple of weeks | Six to twelve weeks to hire, plus ramp-up |
| Best for | Architecture review, security hardening, hiring input, tech strategy | Daily feature work, deep single-codebase ownership |
| Company stage fit | Pre-seed to early revenue, backlog not yet full-time-sized | Funded, steady weekly engineering demand |
| Can run alongside the other | Yes — often oversees a new full-time hire's first year | Yes — often reports into a fractional CTO early on |
When to hire a fractional CTO, and when not to
- Solo or two-founder team, no tech co-founder. A fractional CTO is usually the right first move. Start with a free scan to see where the product stands. Then add review time for what a scan cannot judge. Things like design calls and vendor picks.
- You already have a strong tech co-founder. The gap a fractional CTO fills may not exist yet. Automated, platform-aware scanning — across Lovable, Bolt, and Replit builds — plus an occasional paid audit may be enough. See our audit report guide for how to read one.
- A big customer's security form is holding up a deal. Our audit cost guide breaks down what a paid, human audit runs. It also shows how that stacks up against ongoing fractional care.
- You are heading toward SOC 2, GDPR, or the EU AI Act. This is where fractional care pays off fastest. A named lead can track EU AI Act rules early. Our EU AI Act risk categories guide covers how a SaaS product gets classified. Article 50 transparency rules start 2 August 2026.
- Your backlog is full and funded. Once there is steady, full-week work, and cash for it, hire full-time. That is the moment to switch. Keep a fractional CTO on for the first six to twelve months. Have them review the new hire's early calls on architecture and security.
What the first month actually covers
The clearest way to judge a fractional CTO service? Look at month one. Our DFY Technical Setup is the usual starting point. It runs a full code review. Then it works through the same fixed list. Auth hardening. Database locks. API checks. Rate limits. Header rules. Error tracking. Monitoring. Secrets. Environment config. Database work alone catches real, common gaps. Big ones. Missing backups. Connection settings left too open. Our database hardening guide covers these failures in AI-built apps. Apps that skipped this step at launch.
Every change ships as a pull request. The customer reviews and approves each one. Nothing touching auth, payments, or a database migration ever auto-merges. Not even for a long-standing customer. That limit is on purpose. A fractional CTO's value comes from judgment. Judgment does not shrink down to a rubber stamp.
Start with a free look at where you stand
Before deciding between fractional and full-time, get a real baseline. The free scan reads your live URL from the outside. It returns a Launch Readiness Score out of 100. That takes about 30 seconds. No signup, no code access.
Run the free scan — $0What Launch Ready Code's Code Care is, and is not
Code Care is our fractional CTO model for AI-built startups. A named CTO reviews your product. They open pull requests for fixes. They report back on a set schedule. That runs through the Growth Retainer. Teams that need an account lead and an SLA pick the Scale Retainer. The DFY Technical Setup is the usual starting point. A one-time setup fee covers the full first-month review and build. It continues into the monthly retainer from month two.
Honest limits, because that is the house style here. Code Care is not a staffing agency. It does not replace a full-time engineer once your firm earns one. We do not write your product's core features. We review, harden, and advise on what you already have. We say that plainly. Fractional care is not a stand-in for a real team.
FAQ
What is a fractional CTO?
A fractional CTO is a senior tech lead. They work part time, not full time. A set number of hours or days a month. They handle the same core calls a full-time CTO would. Design. Risk. Hiring. Code quality. The gap is calendar time. One CTO splits the week across several firms. A full-time hire works only for you.
How much does a fractional CTO cost?
Independent fractional CTOs charge $2,000 to $5,000 a month, on average. Or $150 to $300 an hour, for a set number of hours. Agency retainers work differently. Our Growth Retainer costs $2,999 a month. It bundles scans, review time, and a named CTO into one price. Compare that to a full-time senior hire. Base pay alone starts near $180,000 a year in the US. That is before stock, perks, and payroll tax.
Is a fractional CTO worth it for a solo founder?
For most solo or two-founder AI-built startups, yes. At least in the first year. A founder rarely has 40 hours a week of senior work. Not enough to hand off. What they need most is a few hours a month of judgment. Reviewing the database schema before it locks in. Catching a missing rate limit before launch. A second opinion before a big tech call. A fractional CTO fits that shape of work. A full-time hire makes sense once there is enough work. Enough to fill one week.
When should I hire a full-time engineer instead of a fractional CTO?
Hire full-time once your backlog has real, steady work. Enough to fill 40 hours a week. And once the company can pay the full cost. That runs $220,000 or more a year. Salary, benefits, and payroll tax, all added up. A common path: go fractional for six to twelve months. Then hire full-time once there is enough funded work. Keep the fractional CTO on as an advisor. Have them review the new hires' early calls.