You just got offered 2% equity as an early employee. Or maybe you're a co-founder with 25% and wondering if that's enough. The problem? There's no easy way to know if your deal is fair — until now.
We analyzed thousands of startup equity distributions across pre-seed through Series B+ rounds to build the Founder Equity Score — a free tool that compares your equity against industry benchmarks in 60 seconds.
Here are the 4 factors that determine whether your equity deal is fair.
Get Your Free Equity Score
Answer 5 questions and get an instant 0-100 score comparing your equity to industry benchmarks.
Calculate My Equity Score →Why Equity Fairness Matters
Startup equity is the most valuable asset most founders and early employees will ever own — or give away. A 5% difference in equity at incorporation can mean $500K+ at exit for a successful startup.
Yet most equity splits are decided based on gut feeling, not data. Here's why that's a problem:
- Underwater founders: 34% of founders end up with less than 10% after Series B, according to Carta data
- Unequal splits cause failure: Research by Noam Wasserman at Harvard shows imbalanced equity splits correlate with 3x higher founder departure rates
- Regret is expensive: Once equity is set, changing it requires painful renegotiation that damages relationships
Factor 1: Equity Stake Size
The most basic question: do you have enough equity for your position?
Your equity should align with the expected contribution. A CEO who's full-time and foregoing a $200K salary deserves significantly more equity than an advisor who spends 5 hours per month.
Quick Check
If you're a co-founder at pre-seed with 2-3 co-founders, your equity should be 20-40%. If you're below 15%, you should understand why — and consider negotiating. Check your exact score →
Factor 2: Role Alignment
Different roles command different equity. A CEO typically receives the largest stake because they bear the most risk and responsibility. Here's how equity typically breaks down by role:
| Role | Avg Equity (2 Co-founders) | Avg Equity (3 Co-founders) |
|---|---|---|
| CEO | 40-55% | 30-40% |
| CTO | 25-40% | 20-30% |
| COO | 15-25% | 12-20% |
| Other C-suite | 10-20% | 8-15% |
If you're the CTO but have less equity than the COO, something may be off — unless the COO is bringing critical industry relationships or IP.
Factor 3: Co-Founder Balance
Research consistently shows that roughly equal equity splits perform better than highly imbalanced ones. This doesn't mean 50/50 is always right — but extreme imbalances are a red flag.
Red Flag: The 80/20 Split
If one founder has 80% and the other has 20%, the minority founder is essentially an employee with equity, not a true co-founder. This dynamic leads to resentment, disengagement, and often departure. If there's a legitimate reason for the imbalance (one founder contributed the IP, the other joined later), consider vesting schedules that can adjust over time.
The ideal split depends on each founder's contribution across these dimensions:
- Ideation: Who came up with the original idea?
- Capital: Who is funding the initial stages?
- Domain expertise: Who brings industry knowledge?
- Technical skills: Who can build the product?
- Business/network: Who brings customers or investors?
- Time commitment: Who's full-time vs. part-time?
Use our Co-Founder Equity Split Calculator to get a data-driven recommendation based on these factors.
Factor 4: Dilution Outlook
Your equity TODAY is not your equity TOMORROW. Every funding round dilutes your ownership. Here's the typical dilution pattern:
| Round | Typical Dilution | Founder Equity Remaining |
|---|---|---|
| Founding | — | 100% |
| Pre-Seed | 15-20% | 80-85% |
| Seed | 20-25% | 60-68% |
| Series A | 20-30% | 42-54% |
| Series B | 15-25% | 32-46% |
| Series C+ | 10-20% | 25-37% |
A solo founder starting with 100% can expect to own 25-35% by Series C — assuming they raise normally. If they start with only 50% (perhaps after giving away too much early), they'll end up with 12-18% — which may not be enough to stay motivated.
Use our Equity Dilution Simulator to model exactly how your equity changes across rounds.
Startup Equity Benchmarks by Stage
Here are the typical equity ranges for founders at different stages, based on aggregated data from Carta, Pulley, and startup equity surveys:
| Stage | CEO Equity | CTO Equity | COO Equity |
|---|---|---|---|
| Pre-seed (2 founders) | 50-55% | 35-45% | — |
| Pre-seed (3 founders) | 35-45% | 25-35% | 15-25% |
| Seed (post-raise) | 30-40% | 20-30% | 10-20% |
| Series A (post-raise) | 20-30% | 15-22% | 8-15% |
| Series B (post-raise) | 15-25% | 10-18% | 5-12% |
For more detailed benchmarks, see our Startup Equity Benchmarks 2026 page.
Get Your Free Equity Score
Instead of comparing your equity against tables and guessing, use our free Founder Equity Score tool. It takes 60 seconds:
- Enter your role (CEO, CTO, COO, etc.)
- Enter your equity % (e.g., 33%)
- Enter your co-founder count (1-4+)
- Select your company stage (pre-seed through Series B+)
- Select total funding raised (bootstrapping through $15M+)
You'll get an instant 0-100 score with a breakdown of each factor. A score of 80+ means your deal is above average. Below 50 means you may want to negotiate.
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Paste your offer letter and get instant feedback on 30+ equity terms. 100% private.
Analyze My Offer (Free, 30s) →Get Your Free Equity Score Now
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Calculate My Equity Score →Next Steps
If your score is lower than expected, here are your options:
- Negotiate before signing: It's 10x easier to negotiate equity before you sign than after
- Ask for vesting acceleration: If you can't get more equity, negotiate for double-trigger acceleration
- Request anti-dilution protection: Protect your percentage in future rounds
- Use our dilution calculator to model your post-dilution equity before agreeing to anything