Equity for a technical leader is wildly mispriced in both directions. I've seen founders hand a Seed-stage CTO 0.5% and then wonder why they quit within 18 months. I've seen a Series B company give away 4% to a VP Engineering who had never built a team before. Both are mistakes, and both are almost entirely avoidable if you understand what the market actually looks like.
I've been brought into enough compensation benchmarking conversations — as Fractional CTO, as an external reference, as the person being negotiated with — to have a clear view of what works. Here it is, without the recruiter softening.
Why Both Sides Get This Wrong
Founders underprice CTO equity because they benchmark against engineering salaries, not executive impact. They think: "This person is a senior engineer earning €150k. I'll give them 0.5% and a €30k bump." That reasoning fails to account for what a CTO actually does to the value of the company — and what they give up to do it.
A competent CTO at an early-stage startup is taking on career risk (one bet vs. a diversified portfolio of jobs), foregoing market salary (usually €50–120k below market for senior engineers at this stage), and carrying the technical credibility of the entire company with investors, customers, and talent. They're not a senior engineer. They're a co-founder with a different title.
The other failure mode is generous equity without governance. Founders give 3% to a technical leader because they're excited about the relationship, with no vesting schedule, no acceleration clause, no cliff, and no role definition. Two years later, the relationship breaks down and the equity situation is a mess that costs five times the legal fees of doing it properly at the start.
The Ranges by Stage
These are real-market ranges I've observed in European startup ecosystems (Berlin, London, Amsterdam, Paris) across 2022–2025. Adjust upward by roughly 20–30% for US Bay Area. Adjust for sector: regulated industries (fintech, insurtech, healthtech) skew toward the lower end of equity because cash compensation is higher.
| Stage | Round Size | Hired CTO Equity | Technical Co-founder | Notes |
|---|---|---|---|---|
| Pre-Seed | Less than €1M | 2–5% | 10–25% | Co-founder territory; below 2% signals mismatch |
| Seed | €1–4M | 1–2.5% | 5–15% | First external hire; 4-yr vest / 1-yr cliff standard |
| Series A | €5–15M | 0.5–1.5% | 3–8% | Below 0.5% is not competitive; 1%+ requires strong rationale |
| Series B | €15–40M | 0.25–0.75% | 1.5–4% | Dilution compounds; cash comp must rise to compensate |
| Series C+ | €40M+ | 0.1–0.4% | 0.5–2% | RSUs often replace options; benchmark against total comp |
A few important notes on reading that table. First, "Technical Co-founder" is a relationship, not a title. If the person was there from day zero, helped shape the idea, and took the founder's risk, they should be in the co-founder range regardless of what the business card says. Second, these are at-grant, fully diluted numbers. After a Series B raise, the original Seed-era CTO's 1.5% may be 0.8% post-dilution. The grant number and the diluted number are different conversations.
What Affects the Number Within the Range
Within any given stage, a CTO at the high end of the range typically brings several of the following:
- Direct experience building and scaling teams to the company's next milestone (not current state)
- Domain expertise that would take 18 months to hire around otherwise (regulated industries, specific verticals)
- A hiring network that meaningfully reduces the cost of building the team
- Investor credibility that is visible and has been tested
- A track record of exiting, not just building
A CTO at the low end of that range is typically a strong builder who lacks the executive experience to justify a premium — but can grow into the full scope. That's a legitimate hire. Just be honest about it.
The salary trade-off most candidates miscalculate
The right way to price CTO equity is against the full comp package, not in isolation. A CTO taking €80k below market salary at a Seed company should be seeing 1.5–2.5% to make the expected value of the package competitive. If the cash gap is small and the equity is also small, there's no thesis. A good CTO will do this arithmetic before accepting. You should do it before offering.
Vesting Structures That Actually Work
The most common structure — 4-year vest, 1-year cliff, monthly thereafter — is standard for a reason. It aligns incentives across the relationship arc. Don't deviate from it without a clear rationale.
Where I see founders go wrong with structure:
No cliff for the founding team. A 12-month cliff protects both sides. If the relationship doesn't work, neither party is trapped. Founders who resist a cliff for the CTO are often uncomfortable naming the possibility that the relationship might not work. That discomfort is worth examining before the hire, not after.
No acceleration clause for acquisition. If the company is acquired two years into the CTO's tenure, does unvested equity accelerate? Partial (typically 12 months single-trigger) or full acceleration (double-trigger: change of control plus termination)? Double-trigger is market standard for executives. If it's not in the offer, the CTO should ask. If the founder resists, ask why.
Options that expire 90 days post-departure. The standard 90-day exercise window made sense in 1999 when option strikes were low. For later-stage companies where strike prices are meaningful, 90 days can mean the CTO forfeits significant value simply because they can't fund the exercise. 5- to 10-year exercise windows are increasingly standard for senior executives. If you want to attract experienced operators, this matters.
| Structure Element | Minimum Standard | Better Practice | Red Flag |
|---|---|---|---|
| Vesting period | 4 years | 4 years | Less than 3 years |
| Cliff | 12 months | 12 months | No cliff |
| Exercise window | 90 days | 5–10 years post-departure | 30 days |
| Acceleration | None | Double-trigger on acquisition | Single-trigger, full, at Series A+ |
| Refresh grants | None mentioned | Annual or milestone-based | Never discussed |
The Fractional CTO Question
I'm frequently asked where a Fractional CTO fits in this picture. The short answer: equity for a fractional engagement is a separate conversation from the hired-CTO ranges above, and it's more nuanced than most founders realise.
A Fractional CTO is typically engaged on a retainer or day-rate basis — €5,000–15,000/month for 2–3 days per week is a common range in the European market. Equity on top of that retainer is not automatic, and it shouldn't be.
Equity for a Fractional CTO makes sense when:
- The engagement is expected to be long (12 months or more)
- There is genuine executive responsibility, not just advisory input
- The cash comp is meaningfully below what a full-time engagement would pay
- There's a plausible path to either a permanent hire or a significant milestone event
In those cases, 0.1–0.5% over 2–4 years, with appropriate cliff and acceleration terms, is reasonable. Below 0.1% at early stage is not meaningful enough to change the economics of the engagement. Above 0.5% for a fractional role starts to look more like a co-founder arrangement and should be treated accordingly.
The equity-instead-of-cash trap
Founders who offer equity as a substitute for fair cash compensation — rather than a supplement to it — are pricing in a liquidity premium they don't own yet. A CTO who takes a below-market retainer with a "generous" equity promise is subsidising your runway. That's a relationship dynamic you should name honestly if it's happening, not obscure with vague promises about what the equity "could be worth."
How to Benchmark This in Practice
Three data sources I use:
1. AngelList / Wellfound compensation data. Their startup compensation tool shows option ranges by stage and role. It skews US, but the stage-to-equity mapping translates reasonably to Europe with a discount.
2. Index Ventures' "Rewarding Talent" guide. Specific to European startups, periodically updated, and covers the full range of senior roles including CTO. Worth reading before any senior technical hire.
3. Direct references. Ask three founders at similar-stage companies what they granted their technical leaders. This is the fastest way to calibrate for your specific market, sector, and country.
None of these sources replaces judgment. But they give you an anchor that's better than guessing or copying what you heard in a podcast.
Equity is not a reward. It's an ownership claim on something you're both building. Getting it right at the start — the number, the structure, the governance — costs an afternoon and a lawyer's invoice. Getting it wrong costs a relationship, a hire, or a company.
If you're in the middle of structuring a technical leadership hire and want a clear-eyed reference point — or if you're evaluating whether a Fractional CTO engagement makes more sense than a full-time search right now — let's talk. Book a 30-minute discovery call and we'll map out what the right structure looks like for your stage.