How to Use This Tool
Follow these steps to calculate your startup equity vesting schedule:
- Enter the total number of equity shares granted to you in your employment or founder agreement.
- Input the total vesting period in years (typically 4 years for startup equity).
- Select the cliff period (most common is 1 year, where no equity vests until the cliff is reached).
- Choose how often equity vests after the cliff: monthly, quarterly, or annually.
- Enter the current share price of the company’s equity.
- Optionally add an expected annual share price growth rate to project future equity value.
- Input the number of months elapsed since your equity grant date.
- Click Calculate Vesting to see your detailed vesting breakdown.
Use the Reset button to clear all fields and start a new calculation.
Formula and Logic
This calculator uses standard startup equity vesting logic widely used in tech and startup employment agreements:
- Cliff calculation: No equity vests until the cliff period (in months) has passed. If the cliff is not met, vested shares are 0.
- Post-cliff vesting: After the cliff, equity vests in equal installments based on the selected vesting frequency. For example, monthly vesting divides total shares by (vesting period years * 12) to get shares per month.
- Vested shares are prorated based on the number of vesting periods elapsed after the cliff. For quarterly vesting, shares vest every 3 months after the cliff.
- Current vested value is calculated as vested shares multiplied by the current share price.
- Projected value uses compound annual growth rate (CAGR) to estimate equity value based on the expected share price growth rate and time elapsed.
All calculations assume standard time-based vesting with no acceleration clauses (e.g., single-trigger acceleration on acquisition). For accelerated vesting terms, adjust inputs manually to reflect changes.
Practical Notes
When using this calculator for personal financial planning, keep these finance-specific considerations in mind:
- Equity value is not guaranteed: Private company share prices can fluctuate, and there is no public market to sell shares until an exit event (IPO, acquisition, or secondary sale).
- Tax implications: Vested equity is taxed as ordinary income at the time of vesting (for RSUs) or when you exercise options (for ISOs/NSOs). Consult a tax professional to plan for vesting-related tax liabilities.
- Cliff timing: If you leave the company before the cliff period ends, you typically forfeit all unvested equity. Use this calculator to plan career moves around vesting milestones.
- Dilution: Future funding rounds may dilute your equity stake, reducing the number of shares or their value. This calculator does not account for dilution, so adjust total shares if you have dilution estimates.
- Retirement planning: Vested equity can be part of your long-term net worth, but avoid over-allocating your financial plan to illiquid equity.
Why This Tool Is Useful
This tool is designed for real-world financial planning for startup employees, founders, and financial planners:
- Employees can track vesting milestones to plan major financial decisions (buying a home, saving for education) around when equity vests.
- Founders can model vesting schedules for co-founders and early employees to align incentives and plan cap table changes.
- Financial planners can use detailed vesting breakdowns to incorporate illiquid equity into client net worth calculations and tax planning.
- The projected value feature helps estimate long-term wealth building from equity compensation, even with variable share price growth.
Frequently Asked Questions
What is a vesting cliff?
A vesting cliff is a period at the start of your vesting schedule where no equity vests. For example, a 1-year cliff means you get 0 shares if you leave before 12 months, and vest 25% of your total shares (for a 4-year vest) on the 1-year anniversary.
How is vested equity taxed?
Tax treatment depends on the equity type: Restricted Stock Units (RSUs) are taxed as ordinary income when they vest. Incentive Stock Options (ISOs) and Non-Qualified Stock Options (NSOs) are taxed when you exercise the option, not when they vest. Always consult a certified public accountant (CPA) for personalized tax advice.
Can I use this for RSUs and stock options?
Yes, this calculator works for both RSUs and stock options, as both use time-based vesting schedules. For stock options, note that this calculator shows the value of vested shares, but you will need to pay the exercise price to acquire the shares when you exercise options.
Additional Guidance
For the most accurate results, gather your equity grant agreement to confirm exact vesting terms, including cliff length, vesting frequency, and total shares granted. If your company has a dynamic share price, update the current share price regularly to reflect the latest 409A valuation (for private companies) or public market price (for public startups).
If you have performance-based vesting or acceleration clauses, adjust the months elapsed or total shares manually to reflect these terms, as this calculator uses standard time-based vesting only. For complex equity structures, work with a financial planner who specializes in startup compensation.