Equity dilution occurs when new shares are issued, reducing existing shareholders' ownership percentage. Example: You own 100% of 1M shares. After raising $1M for 1M new shares (50% dilution), you own 50% of 2M shares. Though your percentage dropped, your shares may be worth more if valuation increased.
- 15-25%
- seed dilution — IdeaProof Research 2026
- 15-25%
- Series A dilution — IdeaProof Research 2026
- 10-20%
- Series B dilution — IdeaProof Research 2026
- 10-20%
- founder ownership at IPO — IdeaProof Research 2026
- 10-20%
- option pool reserve — IdeaProof Research 2026
Equity dilution occurs when new shares are issued, reducing existing shareholders' ownership percentage. Example: You own 100% of 1M shares. After raising $1M for 1M new shares (50% dilution), you own 50% of 2M shares. Though your percentage dropped, your shares may be worth more if valuation increased. Typical dilution per round: Seed (15-25%), Series A (15-25%), Series B (10-20%). Founders typically own 10-20% at IPO. Dilution isn't inherently bad—taking 50% of a $100M company beats 100% of a $1M company. Manage dilution by: raising at higher valuations, raising less capital, and bootstrapping longer.
Key Equity Dilution Takeaways
- Dilution = ownership % decreasing from new shares
- Seed round: 15-25% dilution typical
- Series A: 15-25% dilution typical
- Series B: 10-20% dilution typical
- Founders own 10-20% at IPO typically
- Higher valuation = less dilution
- Dilution can increase absolute value
- 50% of $100M > 100% of $1M
- Anti-dilution clauses protect investors
- Option pool also dilutes founders
Expert Tips
Optimize for valuation, not just amount raised
Raising $2M at $10M pre vs $8M pre is the difference between 20% and 25% dilution for the same capital
Negotiate the option pool in pre-money vs post-money
Option pool from pre-money dilutes you more. Push for post-money option pool to reduce founder dilution
Model multiple scenarios before term sheet
Run dilution calculations for seed through Series B. Know where you'll end up before agreeing to any terms
Understand anti-dilution provisions
Full ratchet vs weighted average anti-dilution affects how much additional dilution you face in down rounds
Consider alternatives to equity funding
Revenue-based financing, debt, and grants don't dilute. Use them strategically to reduce equity dilution
Recommended Tools & Resources
Carta
Cap table management and dilution modeling
Pulley
Cap table with dilution waterfall analysis
Captable.io
Free dilution scenario modeling
Your Next Steps
Sources & Citations
- [1]IdeaProof Research 2026
Cite this page
IdeaProof. (2026). What is Equity Dilution?. IdeaProof. Retrieved from https://ideaproof.io/questions/what-is-equity-dilutionLast verified: