Vesting
Equity vesting is how founders and employees earn their shares over time, ensuring long-term alignment between the team and the company's success.
What Is Equity Vesting?
Vesting is the process by which a founder or employee earns the right to own their equity shares over a defined period of time. Although a founder may be granted 4,000,000 shares “on paper” at company formation, they do not own all of those shares outright on day one. Instead, they earn them gradually — typically over four years — through continued service to the company.
Vesting serves a single core purpose: ensuring that everyone with equity in the company actually works to build it. Without vesting, a co-founder could leave after six months, take 30% of the company with them, and contribute nothing further while new investors and employees carry the business forward.
Why Vesting Exists
Vesting aligns the interests of founders, employees, and investors over the long term. For a startup that typically takes seven to ten years to reach a meaningful exit, vesting creates a powerful retention mechanism and protects the company against short-term departures.
From an investor’s perspective, vesting is non-negotiable. Before writing a check, VCs will always review the founders’ vesting schedules. If founders are not on vesting, investors will insist that vesting is implemented as a condition of the investment — because an unvested co-founder who leaves is a catastrophic risk to the company.
The Standard Vesting Schedule
The most common vesting schedule in the startup world is 4 years with a 1-year cliff:
- Cliff period: The first 12 months during which no equity vests. If the person leaves before the cliff, they receive nothing.
- After the cliff: At the 12-month mark, 25% of the total grant vests all at once.
- Monthly vesting: For the remaining 36 months, equity vests in equal monthly installments (1/48th of the total grant per month).
Example: 4-Year Vesting Schedule
A co-founder is granted 4,800,000 shares on a 4-year, 1-year cliff schedule:
| Period | Event | Shares Vested | Cumulative |
|---|---|---|---|
| Month 0–11 | Cliff period | 0 | 0 |
| Month 12 | Cliff reached | 1,200,000 (25%) | 1,200,000 |
| Month 13–48 | Monthly vesting | 100,000/month | Up to 4,800,000 |
| Month 48 | Fully vested | 100,000 | 4,800,000 |
Vesting for Founders vs. Employees
Founders
Founder vesting is sometimes implemented retroactively — meaning founders may have already been working on the company for months or years before formal vesting is set up. In these cases, it is common to grant founders partial credit for time already served.
Example: A startup raises a seed round after 14 months of operation. The lead investor requires founder vesting. Since each founder has been working for 14 months, they might receive 14 months of “vesting credit” at closing — meaning they have already vested roughly 29% of their grant (14/48), with the remaining 71% vesting over the next 34 months.
Employees
Employee option grants typically use the same 4-year, 1-year cliff schedule. However, employees are usually awarded options (the right to purchase shares at a fixed price) rather than actual shares. The vesting mechanics are identical, but employees must exercise their options — paying the strike price — to actually own shares.
Acceleration Clauses
Vesting acceleration allows an employee or founder to have their unvested equity vest faster than the normal schedule, triggered by specific events.
Single-Trigger Acceleration
Unvested equity accelerates automatically upon a single defined event — most commonly an acquisition. For example, a founder’s remaining unvested shares might fully vest the moment a company is acquired, regardless of whether they stay on.
Investors typically dislike single-trigger acceleration for founders because it can make the company less attractive to acquirers who want the founders to stick around post-acquisition. Common in executive compensation packages, but unusual for early founders in VC-backed companies.
Double-Trigger Acceleration
This is the more common and investor-accepted form. Two events must both occur for acceleration to trigger:
- First trigger: An acquisition or change of control
- Second trigger: The founder or employee is terminated without cause (or resigns for good reason) within a defined window (typically 12–18 months) after the acquisition
Double-trigger acceleration is considered fair to all parties: it protects employees from being acquired and then immediately let go without their equity, while still incentivizing them to stay and contribute post-acquisition.
What Happens When Someone Leaves
Leaving Before the Cliff
The departing founder or employee vests zero shares. They walk away with no equity in the company. This is the cliff’s primary protective function.
Leaving After the Cliff but Before Full Vesting
The person keeps all shares that have vested to date and forfeits all unvested shares. The forfeited shares typically return to the company’s option pool for future grants.
Example: An employee receives 4,800 options with a 4-year, 1-year cliff and resigns at month 30. They have vested 1,200 shares at the cliff plus (30 − 12) × 100 = 1,800 more shares, for a total of 3,000 vested options. The remaining 1,800 are forfeited.
Leaving After Full Vesting
Once fully vested, the person owns all their shares outright regardless of continued employment.
Common Misconceptions
- “Vesting means I own my shares”: Vesting means you have earned the right to own your shares. For option holders, you must still exercise the option (pay the strike price) to legally own the shares.
- “If I leave, I lose everything”: You only lose unvested shares. Any vested equity is yours.
- “All vesting schedules are the same”: While 4-year / 1-year cliff is standard, some companies use 3-year schedules, back-weighted vesting, or milestone-based vesting — particularly for senior hires.
Key Takeaway
Vesting is the mechanism that aligns long-term effort with long-term reward in a startup. The standard 4-year schedule with a 1-year cliff protects the company from short-term departures while fairly compensating people who stay and build. Founders should set up vesting from day one — before the first outside investment — and include double-trigger acceleration in their agreements to protect against being pushed out after an acquisition. Every person with equity in your company should understand their schedule, their cliff date, and what happens to their shares if they leave.