A vested pension is one you’ve earned the permanent right to keep. Once you’re vested, the retirement benefits your employer funded belong to you by law, and you can collect them at retirement age even if you leave the job years earlier. Getting there takes time on the job: federal law lets employers require up to six years of service to fully vest most 401(k) matches and up to seven years for traditional pensions, though many plans vest faster.
Your Contributions vs. Your Employer’s
Vesting only applies to one side of the account. Anything you put in yourself, such as salary deferrals into a 401(k), is 100% yours the moment it hits the account. You own that money outright even if you quit the following week.1Internal Revenue Service. Retirement Topics – Vesting
Employer money is different. Matching contributions, profit-sharing deposits, and any other employer-funded amounts become yours gradually according to a vesting schedule. If your employer has contributed $10,000 to your account and you’re 60% vested, you legally own $6,000. Walk away before you’re fully vested and the unvested share stays with the plan as a forfeiture.
The vested portion is the part you can take with you. When you leave, you can roll your own contributions plus the vested share of employer contributions into an IRA or a new employer’s plan and keep the tax-deferred growth intact. The unvested share stays behind.
How Long Vesting Takes
Federal law gives employers two ways to structure a vesting schedule, and the maximum timeline depends on what kind of plan you’re in.
401(k)s and Other Defined Contribution Plans
For account-based plans like 401(k)s and profit-sharing plans, employers can choose between cliff vesting and graded vesting.1Internal Revenue Service. Retirement Topics – Vesting
Cliff vesting is all or nothing. You own 0% of employer contributions until you complete three years of service, then you jump to 100%. Leave at two years and eleven months and you forfeit every dollar your employer put in.
- Year 1: 0%
- Year 2: 0%
- Year 3: 100%
Graded vesting builds ownership year by year. The slowest graded schedule allowed by law starts at 20% after two years and adds 20% each year until you reach 100% at the end of year six.2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
- Year 1: 0%
- Year 2: 20%
- Year 3: 40%
- Year 4: 60%
- Year 5: 80%
- Year 6: 100%
These are the longest schedules the law allows. Employers can always be more generous, and many are. Check your plan document for the actual timeline.
Traditional Pensions
A traditional pension vests your right to a future monthly benefit rather than an account balance. Once you’re vested, you’ve locked in the right to collect payments starting at the plan’s retirement age, even if you leave the company years before that. The amount is generally calculated from your salary and years of service up to your departure date.
The maximum timelines run longer here. Employers can use a five-year cliff (0% until year five, then 100%) or a seven-year graded schedule starting at 20% after three years:2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
- Year 3: 20%
- Year 4: 40%
- Year 5: 60%
- Year 6: 80%
- Year 7: 100%
Cash Balance Plans
Cash balance plans are technically defined benefit plans but express your benefit as a hypothetical account balance. Because of that structure, federal law requires them to use the shorter three-year cliff schedule, not the five- or seven-year options available to traditional pensions.2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
Plans That Vest Immediately
Some plans skip vesting schedules entirely. Employer contributions to these plans are 100% yours the moment they’re deposited:
- Safe Harbor 401(k) plans: matching contributions must be fully vested at all times in non-QACA safe harbor plans.3Internal Revenue Service. Issue Snapshot – Vesting Schedules for Matching Contributions
- SIMPLE 401(k) plans: required employer contributions vest when made.4Internal Revenue Service. 401(k) Plan Fix-It Guide – 401(k) Plan – Overview
- SEP-IRAs and SIMPLE IRAs: all employer contributions vest immediately.
One caveat. If your employer runs a Qualified Automatic Contribution Arrangement (QACA), which is an auto-enrollment safe harbor 401(k), matching contributions can follow a two-year cliff schedule rather than vesting on day one.3Internal Revenue Service. Issue Snapshot – Vesting Schedules for Matching Contributions That’s worth knowing if you’re planning to leave within your first two years.
How Years of Service Are Counted
The schedules all turn on “years of service,” and the phrase has a specific legal meaning that catches people off guard.
The standard method requires at least 1,000 hours of work during a 12-month computation period to earn one vesting year, which works out to roughly 20 hours per week.5Office of the Law Revision Counsel. 29 USC 1052 – Minimum Participation Standards Fall short and you generally don’t get vesting credit for that year, even if you were on payroll the whole time. Some employers instead use an elapsed-time method that measures total time employed without tracking hours, which tends to be more favorable for people with variable schedules.6eCFR. 26 CFR 1.410(a)-7 – Elapsed Time
Part-time employees got a meaningful change starting with plan years beginning after December 31, 2024. Under the SECURE 2.0 Act, employees who work at least 500 hours in each of two consecutive 12-month periods must be allowed to participate in salary-deferral arrangements and earn vesting credit, with each such year counting as a full year of service for vesting.7Internal Revenue Service. Notice 24-73 – Additional Guidance with Respect to Long-Term Part-Time Employees If you’ve worked part-time at the same employer for several years, you may be closer to vested than your paperwork suggests.
Leaving and coming back complicates things. If you had zero vesting when you left and your consecutive breaks in service (years with 500 or fewer hours) equal or exceed the service you’d earned before, the plan can wipe out your earlier years.8eCFR. 29 CFR 2530.200b-4 – One-Year Break in Service Employees who were even partially vested before leaving are protected from losing what they’d already earned.
Events That Vest You Automatically
A few situations override the normal schedule and vest you at 100% regardless of how many years you’ve worked.
Reaching the plan’s normal retirement age is one. Every pension plan must treat your benefit as nonforfeitable at that point, and the vesting schedule becomes irrelevant.2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
Plan termination is another. If your employer terminates the plan, all affected participants become fully vested in accrued benefits to the extent those benefits are funded.9Office of the Law Revision Counsel. 26 USC 411 – Minimum Vesting Standards A partial termination can happen when a workforce reduction of roughly 20% or more occurs during the applicable period, which the IRS treats as a rebuttable presumption that a partial termination took place.10Internal Revenue Service. Partial Termination of Plan During large layoffs, everyone affected can end up fully vested even though the schedule alone wouldn’t have gotten them there.
Death and disability are worth flagging because the answer surprises people. Federal law does not require automatic full vesting when a participant dies or becomes disabled. The Internal Revenue Code explicitly allows plans to forfeit unvested benefits on death, apart from any required survivor annuity.9Office of the Law Revision Counsel. 26 USC 411 – Minimum Vesting Standards Many plans voluntarily accelerate vesting in these situations, but the protection comes from your specific plan document, not from statute.
What Happens If You Leave Before You’re Fully Vested
Leaving before 100% vesting means forfeiting the unvested portion of employer contributions. You still keep every dollar you contributed yourself, plus the vested percentage of what the employer put in.
The vested balance is portable. You can move it directly into an IRA or your new employer’s qualified plan and preserve the tax-deferred status. A direct rollover also avoids the mandatory 20% federal withholding that applies to distributions paid to you rather than to another plan.
Coming back to a former employer can restore what you forfeited, within limits. In a defined benefit plan, if you’re rehired before accumulating five consecutive one-year breaks in service, the plan must restore your previously forfeited benefits.11Internal Revenue Service. Improper Forfeiture by Defined Benefit Plans In a defined contribution plan where you took a cash-out of your vested balance, the plan will generally require you to repay that distribution before restoring the employer’s forfeited share. Once you’ve been gone five straight years without qualifying service, the plan’s obligation to restore your old benefits generally ends.
How to Find Your Own Schedule
Your employer is required to give you a Summary Plan Description (SPD) that spells out the plan’s vesting schedule, how it counts years of service, and how break-in-service rules apply.12eCFR. 29 CFR 2520.102-3 – Contents of Summary Plan Description If you don’t have one, ask HR or the plan administrator in writing. They must provide it within 30 days. Your benefits portal or annual statement usually shows your current vesting percentage, but the SPD is where the actual rules live.
One Boundary to Keep in Mind
Everything above applies to private-sector plans governed by ERISA. Federal, state, and local government pensions are exempt from ERISA’s vesting rules, and church plans are generally exempt as well.13U.S. Department of Labor. FAQs About Retirement Plans and ERISA If you work for a government employer, your vesting timeline is set by the specific retirement system covering your position, and it may be more or less generous than the ERISA minimums.