Vesting

Vesting refers to an employee’s ownership of his or her retirement savings in a qualified plan. To become tax-qualified, a 401(k) plan must satisfy the minimum vesting standards provided under ERISA and the Internal Revenue Code.

Accumulated savings in a 401(k) plan are generally the result of:

• Employer contributions and earnings on those contributions
• Employee contributions and earnings on those contributions
• Amounts allocated from plan forfeitures

Qualified plans must contain a vesting schedule that provides the employee with increasing ownership in employer contributions over time, based on length of service. Eventually the employee is “100% vested” and the right to retirement benefits becomes “nonforfeitable.”

Vesting may be immediate or deferred. In the case of deferred vesting, the employee must wait a specified period before having access to employer-funded benefits. Note: a vested benefit is not necessarily distributable without restriction — the tax code may still penalize a withdrawal prior to age 59½. Vesting simply means the employer cannot withhold the benefit from the employee.

Deferred vesting provides a powerful incentive for employees to remain with the same employer. From the employee’s perspective, the vesting schedule determines what they can expect to receive upon termination or retirement, and it limits the amount they may borrow from the plan.

Deferred vesting schedules apply only to benefits arising from employer contributions. Employee contributions and earnings on those contributions are immediately and fully vested at all times — 100% immediate vesting.

The tax code requires “full and immediate vesting” for the following:

• Contributions made by an employer pursuant to an employee’s election (elective contributions)
• Voluntary after-tax contributions made by an employee
• Any contributions counted in computing employees’ actual deferral percentages (ADPs) for nondiscrimination testing
• Rollovers and transfers from other qualified plans

All income earned on any of these contributions must also be fully and immediately vested. All other contributions (and resulting income) may vest under a deferred schedule.

Employers must vest benefits no slower than one of the two schedules prescribed by the tax code. Employers may accelerate vesting faster than these schedules, but not slower.

Prior to 2002, all employer contributions had to vest under one of these slower schedules. Forfeitures may continue to vest under these older schedules.

5-Year Cliff Vesting: The employee can be 0% vested for the first four years, then 100% vested at year five. If the employee quits before year five, all employer-funded benefits are forfeited.

Years of Service	0	1	2	3	4	5+
Vested %	0%	0%	0%	0%	0%	100%

3–7 Year Graded Vesting: A gradual phase-in of ownership between years 3 and 7.

Years of Service	1	2	3	4	5	6	7+
Vested %	0%	0%	20%	40%	60%	80%	100%

Since 2002, employer matching contributions must vest under the accelerated schedule below. Since 2007, nonelective contributions must also use this accelerated schedule. These faster schedules apply to all current 401(k) plan employer contributions.

3-Year Cliff Vesting: The employee is 0% vested for the first two years, then 100% vested at year three.

Years of Service	0	1	2	3+
Vested %	0%	0%	0%	100%

2–6 Year Graded Vesting: Vesting begins at year 2 and reaches 100% at year 6.

Years of Service	1	2	3	4	5	6+
Vested %	0%	20%	40%	60%	80%	100%

Amounts forfeited by departing employees are typically reallocated among remaining participants as additional contributions, based on their compensation levels.

Plans that disproportionately benefit key personnel are considered “top-heavy.” A “key employee” is any current employee who, at any time during the plan year:

• Was an officer earning more than $230,000 (2026, inflation-adjusted)
• Owned more than 5% of the employer
• Owned more than 1% of the employer and earned more than $150,000 per year (not indexed for inflation)

A 401(k) plan becomes top-heavy when the value of the combined accounts of key employees exceeds 60% of the total plan value, or when contributions on behalf of key employees exceed 60% of all contributions.

In top-heavy plans:

• Vesting is accelerated to the 3-year cliff or 2-to-6 year graded schedule
• The employer must make minimum contributions for non-key employees — matching non-key employee deferrals at a percentage equal to the highest percentage deferred by any key employee, up to a maximum of 3%

If a plan is top-heavy in one year but reverts to regular status in later years, the vesting schedule also reverts — however, any benefits already vested under the faster schedule remain vested with the employee.

Qualified plans must be permanent as a general rule, but employers may discontinue or scale down a plan for valid business reasons. A plan may be completely or partially terminated.

The most important consequence of either a partial or complete plan termination is that all affected participants immediately become 100% vested. Under defined contribution plans (including 401(k)s), any nonvested amounts are generally reallocated to the accounts of remaining participants — a practice that tends to favor highly compensated employees who typically have longer tenure.