Share Incentive Plan Calculator

Calculate the potential value of your employee stock options

Input Details

Results

Current Value

Total Value

$1,000

Gain Over Exercise

+$1,000

Projected Exit Value

Total Value

$10,000

Gain Over Exercise

+$9,000

Ownership

Equity Percentage

0.01%

Fully Diluted

0.01%

Vesting Schedule

0%
0 shares vested 1,000 shares remaining

The Share Incentive Plan Calculator is a comprehensive tool for evaluating the real value of your employee stock options. Whether you’ve just received an equity grant as part of a job offer or you’re already mid-way through a vesting schedule, this calculator helps you understand what your options are worth today, what they could be worth at exit, what percentage of the company you own, and how your vesting is progressing — all in one place. It also includes an Advanced Analysis tab for modeling different growth scenarios and a built-in Guide to help you make sense of the key concepts involved.

How to Use the Share Incentive Plan Calculator

The calculator is organized into three tabs — Basic Calculator, Advanced Analysis, and Guide — so you can go as deep as you need to.

Basic Calculator:

  • Input Details:
    • Options/Shares Granted (e.g., 1,000)
    • Strike/Exercise Price (e.g., $1)
    • Current Share Price (e.g., $2)
    • Expected Exit Share Price (e.g., $10)
    • Vesting Period (e.g., 4 years)
    • Cliff Period (e.g., 12 months)
    • Vesting Frequency (e.g., Annually)
    • Total Company Shares for dilution calculation (e.g., 10,000,000)
  • Click “Calculate” to view your full results — Current Value and gain over exercise price (e.g., $1,000, +$1,000), Projected Exit Value and gain (e.g., $10,000, +$9,000), Ownership percentage both standard and fully diluted (e.g., 0.01%), and a visual vesting progress bar and chart showing shares vested versus remaining.

Advanced Analysis:

  • Adjust the growth sliders to set Conservative, Moderate, and Aggressive annual growth rates, and choose how many years to project forward.
  • Click “Update Projections” to see a dynamic chart modeling your option value across all three growth scenarios simultaneously.
  • Review the Tax Considerations section covering ISO versus NSO treatment, Alternative Minimum Tax implications, and 83(b) election guidance for restricted stock.

Why Use the Share Incentive Plan Calculator Online?

Equity compensation can be one of the most valuable parts of a compensation package — but only if you understand what you actually have. Here’s what makes this calculator genuinely useful:

  • Accurate Valuations: Calculates both your current option value based on today’s share price and your projected exit value based on your expected future price, along with the gain over exercise price in each case.
  • Vesting Insights: Visualizes your vesting schedule progress through a progress bar and chart, making it easy to see exactly how many shares have vested, how many remain, and when the next vesting milestone hits.
  • Growth Scenario Modeling: The Advanced Analysis tab lets you model conservative, moderate, and aggressive share price growth projections across a customizable time horizon — so you can stress-test your assumptions and understand the range of possible outcomes before making any decisions.
  • Tax Guidance: Highlights the key tax considerations that anyone holding stock options should be aware of — including the differences between ISOs and NSOs, when AMT exposure can arise, and how an 83(b) election might reduce your tax liability on restricted stock. Note that this is general information only — a qualified tax professional should always be consulted for advice specific to your situation.
  • Ideal for Employees Evaluating Equity: Whether you’re comparing job offers that include equity, deciding when to exercise, or simply trying to understand what your current grant is actually worth, this tool gives you the clarity to make informed, confident decisions.

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