401(k) Vesting

The schedule by which you gain permanent ownership of employer contributions to your 401(k) — your own contributions are always 100% yours immediately.

401(k) vesting refers to the schedule by which an employee gains permanent ownership of their employer's matching or profit-sharing contributions to their retirement account. Your own contributions — the money you elect to defer from your paycheck — are always 100% vested immediately; you own that money the moment it hits your account. Employer contributions are different: companies can require employees to work for a defined period before those contributions become permanently theirs. If you leave before full vesting, you forfeit the unvested employer contributions.

There are two main vesting schedules for employer contributions. Cliff vesting: you own 0% of employer contributions until a specific date, then 100% all at once (e.g., 0% for years 1–2, then 100% after year 3). Graded vesting: ownership increases incrementally over time (e.g., 20% after year 1, 40% after year 2, up to 100% after year 6). The IRS sets maximum vesting period limits — employers can't require more than 3 years for cliff vesting or 6 years for graded vesting on regular matching contributions. Some companies offer immediate vesting as a competitive differentiator.

Vesting schedules are a hidden retention mechanism and a meaningful financial consideration when evaluating job changes. If you're six months from vesting a year's worth of 401(k) match, leaving prematurely forfeits real money. Before resigning, check your vesting status in your retirement plan portal or ask HR. Some offer letters at new employers will include a sign-on bonus large enough to offset unvested 401(k) or equity — this is worth explicitly negotiating if you're leaving significant unvested money on the table.

Vesting Schedule Examples

  • Immediate vesting: employer contributions are yours the day they're deposited. Most generous — common at tech companies competing on benefits.
  • 3-year cliff: 0% vested in years 1–2, 100% after year 3. Leaving after 2.5 years means you keep none of the employer match.
  • 6-year graded: 0% year 1, 20% year 2, 40% year 3, 60% year 4, 80% year 5, 100% year 6. Common at larger employers.
  • 2-year cliff: some employers use a 2-year cliff (the minimum allowed under IRS safe harbor rules).
  • 4-year graded: 25%/year over 4 years — mirrors the equity vesting schedule many employees recognize from stock grants.

401(k) Vesting vs. Equity Vesting

  • Both are retention mechanisms that require you to stay to earn the full benefit.
  • 401(k) vesting applies to employer contributions only — your own deferrals are always 100% vested.
  • Equity vesting applies to RSUs and options — even your initial grant requires you to stay through the schedule.
  • 401(k) vesting schedules are governed by IRS rules with maximum periods. Equity vesting has no federal caps.
  • When job-hopping, calculate unvested 401(k) match PLUS unvested equity to understand the total 'cost' of leaving.