Angel Investment Return Calculator
Angel investor returns.
Calculate angel investment exit proceeds, MOIC, and IRR with dilution factored in, given initial investment and initial ownership percentage.
What this tool does
This calculator models the financial outcomes of an angel investment from entry through exit. It takes your initial investment amount, starting ownership percentage, projected exit valuation, expected dilution across future funding rounds, and time horizon to compute three key outputs: your net exit proceeds (the actual amount received after dilution), your multiple on invested capital (MOIC), and your annualized internal rate of return (IRR). The exit valuation and dilution percentage are the primary drivers of your returns. For example, an investor might use this to compare how different dilution scenarios or exit valuations affect their potential returns on a seed-stage investment. Note that this calculator assumes a straightforward exit and doesn't account for follow-on investment, liquidation preferences, or tax implications—results are for educational illustration only.
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Angel investment return calculator projects exit proceeds, multiple, and IRR from an angel investment. Account for dilution from subsequent rounds before reaching exit. 25k invested for 5% ownership in seed round, diluted 50% through Series A/B/C, exits at 100M valuation: final ownership 2.5%, proceeds 2.5M (100x multiple).
Example: 50k investment, 4% initial ownership, 50% dilution to 2% final ownership, 200M exit, 7 years. Exit proceeds = 4M. MOIC = 80x. IRR = (80)^(1/7) - 1 = 80%. Strong angel return (most angels target 15-25% portfolio IRR, accepting most deals fail to drive returns from few winners).
Angel reality: 60-70% of angel investments fail completely (zero return). 20-30% return original capital or modest multiple. 5-10% generate the 10-100x outcomes that drive portfolio returns. Diversification is critical - 20+ investments needed for statistical chance of catching a winner. Best angels make 50+ investments. SEIS/EIS tax relief in (50%/30% income tax relief) substantially improves risk-adjusted returns.
Run it with sensible defaults
Using initial investment of 50,000, initial ownership of 4%, exit valuation of 200,000,000, total dilution of 50%, the calculation works out to 4,000,000.00. The defaults are meant as a starting point, not a recommendation.
The levers in this calculation
The inputs — Initial Investment, Initial Ownership %, Exit Valuation, Total Dilution %, and Years to Exit — do not pull with equal force. The rate and the time horizon usually dominate — compounding means a small change in either reshapes the final figure more than a similar shift in contribution size. Test this by doubling one input at a time.
How the math works
Exit proceeds = exit valuation × initial ownership × (1 - dilution). MOIC = proceeds / investment. IRR = MOIC^(1/years) - 1.
Using this well
What this doesn't capture
Steady-rate math ignores real-world volatility. Actual returns are lumpy; sequence-of-returns risk matters most in drawdown; fees and taxes drag on compound growth; and behaviour changes in drawdowns can reduce outcomes below the projection. The number represents one scenario rather than a forecast.
££50,000 for 4% ownership, 50% diluted, ££200,000,000 exit = 4,000,000.00.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes exit proceeds by multiplying the exit valuation by your initial ownership percentage, then applying a dilution adjustment. Dilution represents the reduction in your ownership stake through subsequent funding rounds and is subtracted from your original ownership. The multiple on invested capital (MOIC) is derived by dividing total proceeds by your initial investment amount. The internal rate of return (IRR) is then calculated from the MOIC and holding period, expressing annualized returns. The model assumes dilution occurs uniformly and that no capital is deployed between initial investment and exit. It does not account for interim cash distributions, management fees, carried interest, tax consequences, or the actual timing of dilution events across funding rounds.
References
Frequently Asked Questions
Realistic angel returns?
What about dilution?
SEIS/EIS tax benefits?
Time to exit?
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