Equity Dilution Simulator
Visualize exactly how raising capital impacts your ownership over multiple funding rounds.
Seed Round
Series A
How math worksOption pools are calculated on a "post-money" basis. This means the new investors require the option pool to be fully funded by diluting the existing shareholders before the new round closes.
Cap Table Evolution (%)
Final Founder Ownership
52.5%
After Series A
Total Dilution
47.5%
From Incorporation
Post-Money Valuation
$50,000,000
At Series A
Understanding Equity Dilution
Equity dilution is an inevitable part of raising venture capital. Every time a startup raises a new round of funding, new shares are issued to investors, which decreases the percentage of ownership held by existing shareholders (like founders and early employees). While your slice of the pie gets smaller, the goal is for the pie itself to become much larger.
Frequently Asked Questions
Investors typically require that the employee option pool (ESOP) is created or expanded before they invest. This means the dilution from the option pool falls entirely on the existing shareholders (founders) rather than being shared with the new investors. This is known as calculating the option pool on a 'post-money' basis, even though it comes out of the pre-money valuation.
Generally, founders can expect to sell between 15% to 25% of their company in a standard equity financing round (Seed, Series A, Series B). Additionally, they will typically need to allocate or top-up an option pool by 10% to 15%.
Because of the option pool top-up. If you sell 20% to Series A investors and agree to top-up the option pool by an additional 10%, your actual dilution for that round will be closer to 30%. This is the most common mathematical surprise for first-time founders.
No. The goal of raising capital is to grow the value of the company faster than you could without it. Owning 50% of a $100M company is significantly better than owning 100% of a $1M company. Dilution is only 'bad' if you raise capital but fail to increase the enterprise value proportionally.
About the Author
Mahendra Balal
Founder & Financial Modeler
With an MSc in Finance and Business Management, Mahendra designs tools and writes playbooks to help entrepreneurs and investors make data-driven decisions. He is also the founder of Sovereix—a media platform delivering rigorous, independent analysis at the intersection of global markets, emerging technology, and modern wealth creation.
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