RSU vs Stock Options Value Calculator

Choosing between RSUs vs stock options is one of the most consequential compensation decisions software engineers face—especially at high-growth tech companies. While both forms of equity can deliver significant value, their economic outcomes diverge sharply based on strike price, vesting schedule, tax treatment, and company performance. A RSU vs stock options value calculator can help you model these variables to estimate the net present value of each, giving you clarity on which form of equity may be more advantageous for your financial situation.

Stock options grant you the right to purchase shares at a fixed strike price, typically set at the company’s fair market value at grant. If the share price appreciates above this strike price by the time of exercise (after vesting), you profit from the difference—minus taxes. RSUs, on the other hand, represent actual shares (or their cash value) that vest over time, regardless of the strike price. Because RSUs have intrinsic value from day one, they are often perceived as less risky than options, which can expire worthless if the strike price isn’t surpassed.

Taxes further complicate the comparison. When you exercise stock options, the spread (difference between strike price and fair market value) is usually taxed as ordinary income—often at marginal rates as high as 37% (2023 IRS brackets), depending on your income bracket. Any additional appreciation after exercise may be taxed as long-term capital gains (15-20%). RSUs, meanwhile, are taxed as ordinary income upon vesting, with capital gains applying only to post-vesting appreciation. For private companies, illiquidity discounts (typically 20-40% per Levels.fyi) can erode the value of both instruments.

This RSU vs stock options value calculator estimates the net present value of each equity type by factoring in:

• Current and projected share price (based on your expected annual growth rate)
• Vesting period (typically 3-4 years at FAANG and late-stage startups)
• Marginal tax rate (IRS 2023 brackets, 10-37%)
• Long-term capital gains rate (0-20%)
• Company type (public vs. private, with liquidity discount applied for the latter)

Using ranges from Levels.fyi’s compensation database (median growth rates for FAANG: 10-20% annually), Bureau of Labor Statistics wage data (median SWE salary: $120,000-$150,000), and Glassdoor/LinkedIn Talent Insights (private company discounts), this tool provides a data-driven estimate—but not a guarantee—of how RSUs and stock options might compare in your specific scenario.

How It Works

This RSU vs stock options value calculator projects the net present value (NPV) of each equity type by:

1. Projecting Share Price: It compounds the current share price (or its adjusted value for private companies) at your chosen annual growth rate over the vesting period. For example, if you enter a 7% growth rate and 4-year vesting period, it calculates the terminal share price as current_price × (1 + 0.07)^4.
2. Calculating Option Value: For stock options, it subtracts the strike price from the terminal share price to determine profit per share (if positive). This gross profit is then multiplied by the quantity of options. Income tax is applied to the spread (at your marginal rate), and capital gains tax applies to any remaining appreciation.
3. Calculating RSU Value: RSUs are valued at the terminal share price, with income tax applied at vesting and capital gains tax applied to post-vesting appreciation. For private companies, a 30% liquidity discount (based on Levels.fyi benchmarks) is applied to reflect illiquidity risk.
4. Outputting Net Value: The calculator returns the estimated net value of both equity types after taxes, rounded to two decimal places.

Methodology Note

All outputs are ESTIMATES, not guarantees. This tool relies on several data sources and assumptions:

• Growth Rates: The default 7% annual growth reflects the median historical market return (S&P 500) but may not match your company’s trajectory. For private companies, growth rates are harder to predict; Levels.fyi reports ranges of 5-15% for early-stage startups and 10-20% for late-stage pre-IPO companies.
• Tax Rates: Marginal tax brackets are from IRS 2023 federal filings (state/local taxes are not included). Long-term capital gains rates assume a holding period of >1 year. In reality, tax treatment can vary, and RSUs/options may have different qualifying periods.
• Private Company Discount: The 30% discount for private companies is based on Levels.fyi’s analysis of secondary market transactions. Discounts can range from 20-40% depending on funding stage, investor demand, and redemption rights.
• Vesting Period: The default 4-year vesting aligns with industry norms (e.g., 1-year cliff + 3 years monthly vesting) but may differ by company.
• Exercise Assumptions: The calculator assumes stock options are exercised at the end of the vesting period. In practice, you might exercise earlier (e.g., via an 83(b) election), but this tool does not model early exercise scenarios.

For personalized advice, consult a financial advisor or tax professional, as individual circumstances (e.g., state tax rates, alternative minimum tax, or company-specific policies) can significantly impact outcomes.

Frequently Asked Questions