A vested pension is a retirement benefit you’ve worked long enough to legally own, meaning your employer can’t take back its contributions if you leave. The money you deposit from your own paycheck is yours from day one, but your employer’s share only becomes yours after you complete the years of service set by the plan. Federal law caps those timelines at six years for most 401(k)-style plans and seven years for traditional pensions, though many employers vest employees faster.1Internal Revenue Service. Retirement Topics – Vesting
Your Money Is Always Yours. Your Employer’s Isn’t, Yet.
Vesting only matters for one side of the account. Any contributions you make yourself, such as salary deferrals into a 401(k), are 100% vested the moment they land in your account. You own that money outright even if you quit the same week you contributed it.1Internal Revenue Service. Retirement Topics – Vesting
Employer contributions are the ones at risk. Matching contributions, profit-sharing allocations, and other employer-funded deposits become yours gradually as you accumulate service. Until you hit 100% vested, any portion that hasn’t vested stays with the plan if you leave. A $10,000 employer contribution that is 60% vested means you legally own $6,000. The other $4,000 goes back to the plan as a forfeiture.
Only the vested portion travels 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. The unvested share stays behind no matter what.
How Vesting Schedules Work
Federal law gives employers a few scheduling options. Each ties ownership to years of service, and the rules differ depending on whether you have a 401(k)-style account or a traditional pension.
401(k)s and Other Defined Contribution Plans
For plans like 401(k)s and profit-sharing accounts, employers can use cliff vesting or 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 straight to 100%. Leave at two years and eleven months, and you forfeit every dollar your employer put in.
Graded vesting gives you increasing ownership each year. The slowest graded schedule the law allows starts at 20% after two years of service and adds 20% annually until you reach 100% at the end of year six:2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
- Year 2: 20%
- Year 3: 40%
- Year 4: 60%
- Year 5: 80%
- Year 6: 100%
These are the slowest schedules allowed. Your employer can be more generous, and many are. Check your plan document for the actual numbers.
Traditional Pensions
Traditional pensions vest your right to a future monthly benefit rather than an account balance. Being vested in a pension means you’ve locked in the right to collect payments starting at the plan’s retirement age, even if you leave the company years before. The amount is usually calculated from your salary and years of service up to the date you leave.
The timelines run longer than for 401(k)s. Employers can use a five-year cliff (0% until year five, then 100%) or a seven-year graded schedule that starts at 20% after three years and reaches 100% at year seven.2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
Cash Balance Plans
Cash balance plans are a hybrid. Technically they’re defined benefit plans, but they express your benefit as a hypothetical account balance. Because of that structure, federal law requires them to follow the shorter three-year cliff vesting schedule used for 401(k)s, not the longer pension schedules.2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
Plans With Immediate Vesting
Some plan types 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 are fully vested 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 wrinkle: if your employer uses a Qualified Automatic Contribution Arrangement (QACA), which is an auto-enrollment version of a safe harbor 401(k), matching contributions can follow a two-year cliff schedule instead of vesting immediately.3Internal Revenue Service. Issue Snapshot – Vesting Schedules for Matching Contributions That matters if you’re planning to leave within the first couple of years.
How Years of Service Are Counted
Every schedule above hinges on “years of service,” and that phrase has a specific legal meaning that trips people up. The counting method decides where you actually stand.
The 1,000-Hour Rule
The standard method requires you to work at least 1,000 hours during a 12-month computation period to earn one year of vesting service.5Office of the Law Revision Counsel. 29 USC 1052 – Minimum Participation Standards That’s roughly 20 hours per week. Fall below 1,000 hours in a given period and you generally don’t earn a vesting credit for that year, even if you were technically employed the whole time.
The Elapsed-Time Method
Some employers use an alternative that measures total time employed, regardless of hours worked. Under this method, your service runs from the date you first perform work until you leave, with no hours tracking.6eCFR. 26 CFR 1.410(a)-7 – Elapsed Time It tends to help employees with variable schedules.
Breaks in Service
If you leave and come back, your previously earned vesting credits usually survive, but not always. A break in service occurs when you work 500 or fewer hours in a computation period.7eCFR. 29 CFR 2530.200b-4 – One-Year Break in Service One break alone doesn’t erase anything. The real risk falls on employees who had zero vesting before they left: if your consecutive breaks equal or exceed the years of service you earned before leaving, the plan can disregard those earlier years. Employees who were partially or fully vested before leaving are protected from losing their previously earned credits.
Part-Time Workers Under SECURE 2.0
Before 2025, many part-time employees were shut out of vesting because they couldn’t hit 1,000 hours. The SECURE 2.0 Act changed that. Starting with plan years beginning after December 31, 2024, 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. Each 12-month period with at least 500 hours counts as a full year of service for vesting purposes.8Internal Revenue Service. Notice 24-73 – Additional Guidance with Respect to Long-Term Part-Time Employees If you’re a part-time worker who’s been with the same employer for several years, this rule may put you closer to vesting than you think.
Events That Vest You Automatically
Certain events override the normal schedule and vest you at 100% immediately.
Reaching Normal Retirement Age
Every pension plan must provide that your right to benefits becomes nonforfeitable once you reach the plan’s normal retirement age. The vesting schedule becomes irrelevant at that point.2Office of the Law Revision Counsel. 29 USC 1053 – Minimum Vesting Standards
Plan Termination or Partial Termination
If your employer terminates the retirement plan or a partial termination occurs, all affected employees become fully vested in their accrued benefits to the extent those benefits are funded.9Office of the Law Revision Counsel. 26 USC 411 – Minimum Vesting Standards A workforce reduction of roughly 20% or more during the applicable period can trigger a partial termination, and the IRS treats that level of turnover as a rebuttable presumption that one occurred.10Internal Revenue Service. Partial Termination of Plan During layoffs, if enough people are let go, everyone affected gets full vesting whether the schedule says so or not.
Death and Disability
Federal law does not require automatic full vesting when an employee dies or becomes disabled. The Internal Revenue Code explicitly permits plans to forfeit unvested benefits on death, with the exception of any required survivor annuity.9Office of the Law Revision Counsel. 26 USC 411 – Minimum Vesting Standards Many employers voluntarily accelerate vesting on death or disability, but that protection comes from the plan document rather than from statute. Read your plan’s actual terms.
What Happens If You Leave Before Full Vesting
Leaving before 100% vested means forfeiting the unvested portion of employer contributions. You keep everything you put in, plus whatever percentage of the employer’s contributions you’ve earned. The unvested share stays with the plan.
If you’re later rehired before accumulating five consecutive one-year breaks in service, a defined benefit plan must restore the benefits you previously forfeited.11Internal Revenue Service. Improper Forfeiture by Defined Benefit Plans In defined contribution plans where you received a cash-out of your vested balance, the plan typically requires you to repay that distribution before restoring the forfeited employer contributions. The five-break threshold is the key number. Once you’ve been gone that long without qualifying service, the plan’s obligation to restore your old benefits generally expires.
The vested balance itself is portable. You can roll it directly into an IRA or your new employer’s qualified plan, keeping the tax-deferred status intact and avoiding both income taxes and the 20% withholding that applies to distributions paid directly to you.
How to Find Your Own Vesting Schedule
Your employer is legally required to give you a Summary Plan Description that spells out the vesting schedule, how years of service are calculated, and how break-in-service rules work.12eCFR. 29 CFR 2520.102-3 – Contents of Summary Plan Description If you’ve never received one, request it from HR or the plan administrator. They have 30 days to respond to a written request. Your benefits portal or annual statement may show your current vesting percentage, but the Summary Plan Description is the authoritative document for the rules behind that number.
If You Work for a Government or Church Employer
Everything above applies to private-sector plans governed by ERISA. Federal, state, and local government pension plans are exempt from ERISA’s vesting requirements, and church plans are generally exempt as well.13U.S. Department of Labor. FAQs About Retirement Plans and ERISA Government plans have their own vesting rules set by statute or collective bargaining, and those can be more or less generous than the ERISA minimums. If you work for a government employer, your vesting timeline is governed by the specific retirement system covering your position rather than the federal standards described here.