How to use the vesting schedule generator
- Enter the total shares in the grant and the vesting start date.
- Enter the vesting length in months, the cliff in months (0 for none) and how often shares vest.
- Choose where leftover shares go if the total does not divide evenly.
- Read the first vest, the number of vest events and the full table of dates, shares and totals.
Formula
vest periods = vesting length / months between vests
shares per period = whole shares of (total / periods), with the leftover given as chosen
periods that end before the cliff are held back and vest together at the cliff
vest dates = start date + months, moved back to the end of a shorter month
Only whole shares are used. The leftover goes either one share each to the first vests or all to the last vest, and the vested total always ends at exactly the grant size.
4,800 shares over 4 years with a 1 year cliff
A grant of 4,800 shares vests monthly over 48 months with a 12 month cliff, starting on January 15, 2026. Each month is worth 100 shares. Nothing vests until the cliff, and then the first 12 months vest together, so 1,200 shares vest on January 15, 2027. After that 100 shares vest each month for 36 months, a total of 37 vest events, ending on January 15, 2030.
With 1,001 shares vesting yearly over four years and the extra share going to the first vest, the vests are 251, 250, 250 and 250. A start of January 31 with a 3 month schedule vests on February 28, March 31 and April 30.
Cliffs and periods
A cliff protects the company by delaying any vesting until a person has stayed a minimum time. When the cliff arrives, the shares that would have vested up to that date vest together. After the cliff the schedule continues as normal. A cliff of 0 means shares vest from the first period.
To value the vested shares, use the Equity Compensation Calculator. To weigh the grant against pay and benefits, see the Job Offer Comparison Calculator. The Stock Split Calculator shows how a split changes the share counts.
Reading your own agreement
Your grant agreement is the source of truth. Some plans vest on the start date of employment and some on the grant date, some round differently, and some accelerate on certain events. Use the tool to understand the shape of a schedule, and check the dates against the agreement.
Assumptions and limits
- Shares vest in equal whole-share amounts per period, with leftovers placed as you choose.
- The vesting length must be a multiple of the months between vests.
- Vest dates fall on the same day of the month as the start date, or the last day of a shorter month.
- Acceleration, termination, taxes and the value of the shares are not modeled.
- This is not legal or tax advice; your agreement controls.
Frequently asked questions
What happens at the cliff?
Everything that would have vested up to the cliff date vests at once. After that, vests continue on the usual schedule.
Why does the tool need whole shares?
Most plans issue whole shares. A leftover is placed at the start or at the end, and you can pick which one matches your plan.
Can the cliff be longer than one period?
Yes. A 12 month cliff on a monthly schedule holds back twelve months and then vests them together.
Does the schedule depend on the date I enter?
The dates do. The share counts do not change with the date, but the calendar dates follow the start date you give.