What it means
When a company grants shares or stock options to an employee or founder, those financial rewards do not become available all at once. Instead, they are subject to a vesting schedule.
This means ownership builds up gradually over time, usually tied to years of service or specific milestones. The primary purpose is retention.
By making staff wait for their ownership to finalise, businesses align individual success with the long-term growth of the company. In practice, schedules often include a cliff period.
A cliff is an initial waiting time, commonly one year, where no equity is earned at all. If the employee leaves before this cliff ends, they receive nothing.
Once the cliff is passed, a large chunk vests immediately, and the remainder trickles out monthly or quarterly. Shares that never vest are normally returned to the company, where they can go back into a pool for future hires.
Many agreements also include leaver terms, which set out what happens if someone is dismissed or resigns, and some schedules speed up vesting if the company is sold. These details are worth reading carefully before anyone signs.
For non-finance managers, understanding this concept is crucial when designing compensation packages or hiring key talent. It protects the business from handing out valuable ownership to someone who departs after a few weeks, while offering employees a tangible stake in future success.
Think of equity vesting like a baker earning a cake slice by slice for every month they stay at the bakery, rather than getting the whole cake on day one and walking out the door.
In practice
Real-world examples
Example 1
A tech startup hires a lead developer and offers 10,000 shares on a 4-year vesting schedule with a 1-year cliff. The developer earns 2,500 shares when the first year is complete. After that, roughly 208 shares vest each month for the remaining 36 months.
Example 2
A manufacturing SME brings in a new operations director and grants 5,000 options over 3 years, with no cliff. Options vest evenly every three months, so 416 or 417 options vest each quarter. This rewards steady tenure without a harsh initial barrier, though it also means a quick departure still leaves the director with something.
Example 3
Three co-founders of an agency agree to a 4-year vesting schedule on their own shares. If one co-founder walks away after 15 months, only 15/48, or 31.25%, of that founder's shares have vested. The other 68.75% go back to the company, which protects the people who stay to build the business.
Think of it
Think of equity vesting like a baker earning a cake slice by slice for every month they stay at the bakery, rather than getting the whole cake on day one and walking out the door.
Formula
Calculation
Vested Shares = Total Shares Granted x (Months Served / Total Months in Schedule), but only once any cliff has been passed.
Example without a cliff: 1,200 shares granted over a 48-month schedule. After 12 months, Vested Shares = 1,200 x (12 / 48) = 300 shares.
Example with a one-year cliff: 12,000 options granted over 48 months. If the employee leaves after 8 months, nothing has vested, because the cliff was not reached. If the employee leaves after 18 months, the cliff has been passed, so Vested Options = 12,000 x (18 / 48) = 4,500 options. The remaining 7,500 options are forfeited and return to the company.Case study
Seen in the real world
This is a fictional, illustrative scenario. At BrightLeaf Software, the CEO hired Sarah as Chief Marketing Officer, granting her 12,000 stock options with a standard four-year vesting schedule and a one-year cliff. After eight months, Sarah received a better offer elsewhere and resigned. Because she had not reached the twelve-month cliff mark, zero options had vested, meaning she walked away with no company stock.
BrightLeaf retained those 12,000 options to offer to her replacement. Two years later, the company hired David under the same terms. David stayed for the full duration. By month twenty-four, half of his options, equal to 6,000 shares, had vested.
When BrightLeaf was later acquired, David was able to exercise his vested options and share in the financial upside, while the company avoided losing equity to someone who left early. The board also noticed a side benefit. Because Sarah's unvested options returned to the pool, the founders were not diluted further to find a replacement. In this illustrative case, vesting protected the existing owners and still gave a committed hire a genuine reward.
Watch out
Common mistakes
- Assuming employees own their shares immediately upon receiving the grant agreement.
- Forgetting to include a cliff period, which leaves the company unprotected if someone leaves quickly.
- Failing to explain the tax implications of vesting to staff members.
Questions
People also ask
What happens to my vested shares if I leave the company?
You keep any shares that have already vested, though you usually have a limited window to purchase stock options.
What is a cliff in a vesting schedule?
A cliff is a mandatory waiting period before any equity vests, usually set at one year.
Do founders have to vest their own equity?
Yes, investors often require founders to vest their shares to ensure they remain committed to the business.