Startup Tools
Founder Vesting Calculator
Estimate vested and unvested founder equity using straight-line monthly vesting and a cliff.
Result
Formula and methodology
Before cliff: 0; after cliff: Total equity × min(Elapsed months ÷ Total vesting months, 1)
Use consistent definitions, dates and fully diluted ownership assumptions where relevant.
Worked example
20% equity over 4 years with a 12-month cliff is 5% vested at month 12.
How to use
- Enter the requested assumptions using consistent units.
- Select Calculate.
- Review the method and limitations before using the estimate.
Frequently asked questions
What does this calculator estimate?
Estimate vested and unvested founder equity using straight-line monthly vesting and a cliff.
Is this result guaranteed?
No. It is a simplified scenario and actual commercial or investment outcomes may differ.
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Disclaimer: This is a simplified planning estimate. Results depend on assumptions and are not investment, legal or tax advice or a professional valuation.