What a Vesting Schedule Means for Founder Equity and Why Reverse Vesting Matters

A vesting schedule defines the timeline over which a founder or employee earns the right to their equity. Standard founder vesting is four years with a one year cliff: no equity vests until the one year anniversary of the vesting start date, at which point twenty-five percent vests immediately, and the remaining seventy-five percent vests monthly over the following thirty-six months. Reverse vesting applies this structure to already issued founder shares: the founder holds the shares legally but the company has the right to repurchase unvested shares at the original issue price if the founder departs before the schedule completes.

The Distinction That Matters

Founder vesting is not primarily about the founder. It is about co-founder departure risk, which is one of the first things an institutional investor assesses when evaluating a team. A company in which one co-founder holds thirty percent of the equity with no vesting schedule has exposed every remaining founder and investor to a scenario in which that co-founder departs after six months and retains thirty percent of the company without contributing to its future growth. Investors will identify this exposure in diligence and will typically require founder vesting to be in place as a condition of closing.

The vesting start date matters as much as the schedule itself. If founders have been working on the company for eighteen months before institutional investors require vesting to be implemented, the fair approach is to back-date the vesting start to the company's incorporation date, giving founders credit for the time already worked. This is called vesting acceleration for time served. Not doing this creates a situation where a founder's four-year clock starts at the Series A close, meaning they are not fully vested until eight years after founding.

Why It Surfaces in a Raise Process

Standard institutional due diligence includes a review of founder agreements to confirm that vesting schedules are in place and that the start dates are documented. A company with no founder vesting agreements will be required to implement them before the round closes. If a co-founder has already departed and their shares were not subject to vesting, the investor will assess whether the departed co-founder's holding creates a governance or economic problem for the company going forward.

The Common Structural Error

The most common error is founding teams that operate for one to three years without formal vesting agreements, assuming the working relationship will continue and that formal documentation is unnecessary. When a co-founder eventually departs, the absence of a vesting schedule means their full equity stake leaves with them, regardless of how early the departure occurs. This situation is extremely difficult to resolve after the fact and significantly easier to prevent by implementing vesting at incorporation.

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