Vesting Schedule Calculator
Calculate your stock option vesting schedule with a standard 4-year term and 1-year cliff showing monthly vested shares and cumulative ownership.
Employee Equity Value Calculator
Calculate the after-tax value of employee stock options at different exit valuations, accounting for strike price, shares, and tax implications.
$
Fully diluted share count
Federal + state + FICA estimate
%
Ownership %⧉
0.5000%
50,000 of 10,000,000 shares
Exercise Cost⧉
$25,000.00
50,000 shares × $0.50
Value at $100M Exit⧉
$308,750.00
Gross: $475,000.00, Tax: $166,250.00
Value at $1B Exit⧉
$3,233,750.00
After-tax proceeds
Exit Value Comparison
$10M
$16,250.00
$25M
$65,000.00
$50M
$146,250.00
$100M
$308,750.00
$250M
$796,250.00
$500M
$1,608,750.00
$1,000M
$3,233,750.00
$2,500M
$8,108,750.00
$5,000M
$16,233,750.00
Exit Scenario Breakdown
| Exit Valuation | Price/Share | Gross Value | Exercise Cost | Est. Tax | Net After Tax |
|---|---|---|---|---|---|
| $10,000,000.00 | $1.00 | $25,000.00 | $25,000.00 | $8,750.00 | $16,250.00 |
| $25,000,000.00 | $2.50 | $100,000.00 | $25,000.00 | $35,000.00 | $65,000.00 |
| $50,000,000.00 | $5.00 | $225,000.00 | $25,000.00 | $78,750.00 | $146,250.00 |
| $100,000,000.00 | $10.00 | $475,000.00 | $25,000.00 | $166,250.00 | $308,750.00 |
| $250,000,000.00 | $25.00 | $1,225,000.00 | $25,000.00 | $428,750.00 | $796,250.00 |
| $500,000,000.00 | $50.00 | $2,475,000.00 | $25,000.00 | $866,250.00 | $1,608,750.00 |
| $1,000,000,000.00 | $100.00 | $4,975,000.00 | $25,000.00 | $1,741,250.00 | $3,233,750.00 |
| $2,500,000,000.00 | $250.00 | $12,475,000.00 | $25,000.00 | $4,366,250.00 | $8,108,750.00 |
| $5,000,000,000.00 | $500.00 | $24,975,000.00 | $25,000.00 | $8,741,250.00 | $16,233,750.00 |
* Tax estimates are simplified. Actual taxes depend on ISO/NSO status, holding period, AMT, and state laws. Consult a tax professional.
Planning notes, formulas, and examples
About the Employee Equity Value Calculator
The Employee Equity Value Calculator helps startup employees understand the potential worth of their stock options under various exit scenarios. By inputting your number of shares, strike price, and potential exit price per share, the calculator shows your gross and after-tax proceeds so you can see what the equity might actually be worth.
Stock options are a core component of startup compensation, but their value is notoriously difficult to estimate. Unlike salary, which is certain and immediate, stock options depend on the company reaching a liquidity event (IPO or acquisition) at a price higher than your strike price. This calculator helps you model different outcomes so you can make informed decisions about accepting offers, exercising options, and financial planning.
The page models multiple exit scenarios simultaneously, accounting for exercise costs and estimated taxes. While it uses simplified tax estimates (actual tax treatment depends on ISO vs. NSO status, holding periods, AMT, and state taxes), it provides a useful framework for evaluating your equity's potential and comparing job offers.
When This Page Helps
Understanding your equity value is essential for career decisions. Should you join a startup at a lower salary for more equity? Should you exercise your vested options? What might your shares be worth at exit? This calculator answers these questions by modeling realistic scenarios. It also helps you avoid the #1 mistake employees make: assuming the "paper value" of their options is what they'll actually receive after exercise costs and taxes.
How to Use the Inputs
- Enter the number of stock options you hold (or were offered).
- Enter your strike (exercise) price per share from your option grant.
- Enter the total shares outstanding to calculate your ownership percentage.
- Enter multiple potential exit valuations to compare scenarios.
- Enter your estimated tax rate to see after-tax proceeds.
- Review the exit scenario table for gross and net values at each exit price.
Formula used
Gross Value = Shares × (Exit Price Per Share − Strike Price)
Exercise Cost = Shares × Strike Price
Taxable Gain = Gross Value (simplified)
Estimated Tax = Taxable Gain × Tax Rate
Net After-Tax Value = Gross Value − Estimated Tax
Ownership % = Your Shares ÷ Total Shares Outstanding × 100Example Calculation
Result: $475,000 gross, $308,750 after tax
With 50,000 options at a $0.50 strike price and a $10.00 exit price, the spread is $9.50 per share. Gross value is 50,000 × $9.50 = $475,000. Exercise cost is 50,000 × $0.50 = $25,000. Estimated tax at 35% on the $475,000 gain is $166,250. After-tax net proceeds are approximately $308,750.
Tips & Best Practices
- Your option's value depends entirely on the exit price exceeding your strike price — options can be worth zero.
- ISO (Incentive Stock Options) have favorable tax treatment if you hold shares for 1+ year after exercise and 2+ years after grant.
- NSO (Non-Qualified Stock Options) are taxed as ordinary income at exercise, regardless of holding period.
- Factor in AMT (Alternative Minimum Tax) exposure when exercising ISOs — this can create a tax bill before any liquidity.
- Early exercise (within 30 days of grant with 83(b) election) can minimize future tax by starting the capital gains clock.
- Never spend money you don't have based on paper equity value — most startups don't reach liquidity.
- Compare total compensation (salary + equity value) when evaluating startup vs. big company offers.
Understanding Employee Stock Options
Stock options give employees the right to purchase company shares at a fixed price (strike price) for a set period. Their value comes from the potential gap between the strike price and a future price when the company is acquired or goes public. They're essentially a bet on the company's future value that costs nothing until you exercise.
Tax Implications of Stock Options
Tax treatment of stock options is complex and depends on option type (ISO vs. NSO), timing of exercise, holding period, state of residence, and AMT exposure. ISOs can qualify for long-term capital gains rates if you hold the shares for 1 year after exercise and 2 years after grant. NSOs create ordinary income at exercise. Always consult a tax professional.
Evaluating an Equity Offer
When evaluating a startup offer, request: number of options, strike price, total shares outstanding (fully-diluted), latest 409A valuation, and the exercise window if you leave. Calculate your ownership percentage and model various exit scenarios. Compare total expected compensation to alternatives, discounting equity by the probability of various outcomes.
The Liquidity Reality
Most startup equity never becomes liquid. The majority of startups fail before an IPO or acquisition. Even successful companies may take 7–10 years to reach liquidity. Factor this timeline and probability into your financial planning. Don't give up more than 15–20% of market salary for equity unless you genuinely believe in the company's potential.
Sources & Methodology
Last updated:
Frequently Asked Questions
The strike price (or exercise price) is the price you pay per share to convert your options into actual shares. It's set at the fair market value (FMV) on your grant date, as determined by a 409A valuation. Your profit is the difference between the exit price and the strike price.
ISOs (Incentive Stock Options) receive preferential tax treatment — no ordinary income tax at exercise if held long enough. NSOs (Non-Qualified Stock Options) are taxed as ordinary income at the time of exercise on the spread between strike and current FMV. ISOs are only available to employees; NSOs can be granted to contractors.
Typically, you have 90 days after leaving to exercise vested options. Unexercised options expire. Some companies offer extended exercise windows (1–10 years). Check your option agreement for the exact window. If you can't afford the exercise cost plus potential tax bill, you may lose the options.
Divide potential exit valuations by total shares outstanding (fully diluted). If the company might be worth $100M and there are 10M fully-diluted shares, the exit price is $10/share. Your HR team or cap table administrator can tell you the current fully-diluted share count.
Yes. If the company fails, is acquired below the strike price, or never reaches a liquidity event, your options may be worthless. Even if the company has a positive valuation, your strike price might be above the acquisition price per share if later rounds created negative dynamics.
Early exercise (with an 83(b) election) can be beneficial if the strike price is very low and you believe the company will substantially increase in value. It starts your capital gains holding period immediately. However, you risk losing the exercise cost if the company fails. Consult a tax advisor for your specific situation.
More in this topic
Cliff Value Calculator
Calculate the dollar value of shares that vest at your cliff date under multiple company valuation scenarios to understand your equity milestone.
409A Valuation Estimator
Estimate a simplified 409A fair market value for common stock using the backsolve method from the latest preferred round price with typical discounts.