Being vested in your 401(k) means you own the vested portion of the account. Your own salary contributions are always 100% vested. Employer matching and other employer contributions may become yours over time, depending on the plan’s schedule and how it counts your service. If you leave before you are fully vested, you generally keep your own contributions and the vested share of employer contributions; the unvested share may be forfeited under the plan’s terms.
What vesting means for your account
The IRS defines vesting as ownership. Once an amount is 100% vested, you own it and your employer cannot take it back. Vesting matters when an employer contribution is subject to a schedule: your account statement may show the full balance, while the amount you are entitled to keep if you leave may be smaller.
Your employee salary deferrals are always 100% vested, including any investment gains or losses associated with them. The vesting question usually concerns employer money, such as matching contributions, profit-sharing contributions, or other employer contributions. Different contribution sources in one account can have different vesting terms.
How common 401(k) vesting schedules work
For general employer contributions covered by the IRS schedule rules, the plan may use a three-year cliff schedule or a six-year graded schedule. These are minimum schedule alternatives, not a universal schedule for every 401(k); a plan may vest employer contributions faster. The percentages below are the IRS examples, checked in 2026.
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| Credited years of service completed | Three-year cliff | Six-year graded |
|---|---|---|
| Less than 2 | 0% | 0% |
| 2 | 0% | 20% |
| 3 | 100% | 40% |
| 4 | 100% | 60% |
| 5 | 100% | 80% |
| 6 | 100% | 100% |
With cliff vesting, you remain at 0% until you complete the required service period, then become fully vested. With graded vesting, you earn ownership in increments. The schedule applies to credited service under your plan—not necessarily calendar years from your hire date—so the table alone cannot establish your percentage.
Which employer contributions may follow a different rule?
Do not assume that every employer contribution is subject to the same schedule. The plan type and the source of the money matter.
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- Traditional 401(k): Employer matching and other employer contributions may vest over time under the plan’s schedule.
- Safe harbor 401(k): Certain contributions required for the safe-harbor arrangement must be fully vested when made. Additional matching contributions may be treated differently, so identify the specific contribution type.
- SIMPLE 401(k): Required employer contributions, including matching contributions, must be fully vested when made.
How service credit affects your vested percentage
Your plan document explains how the plan measures service. The plan may specify the service period, hours or other method used to determine when you move to the next vesting milestone. IRS guidance notes that service-counting methods can differ among plans. Do not treat an approximate number of years employed—or the schedule table above—as a substitute for the plan’s credited-service calculation.
Ask HR or the plan administrator to confirm the service date and method used for your account, along with the current vested percentage for each employer contribution source. This is especially important if you had breaks in service, worked part time, or changed employment status; the applicable answer depends on the plan’s terms and your account history.
When full vesting may be required
Some events require full vesting regardless of an ordinary schedule. Participants must become fully vested at normal retirement age and when a plan terminates. Participants affected by a partial plan termination must also become fully vested. Whether a particular event qualifies and which participants are affected depend on the circumstances and plan rules.
IRS guidance also describes circumstances in which unvested amounts may be forfeited, including a narrow rule involving more than 500 hours in a year for five years. That figure is not a shortcut for calculating your own vesting: check the plan’s rules and ask the administrator how they apply to your situation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to find your 401(k) vesting schedule
- Read the Summary Plan Description (SPD). Search for “vesting,” “employer contributions,” and “years of service.” The SPD is the plan’s plain-language summary and identifies its vesting schedule. The IRS says participants generally receive it within 90 days after becoming plan participants.
- Separate contribution sources. Review your benefits statement or account details to distinguish your salary deferrals from employer match, profit-sharing, or other employer contributions. Those employer sources may have different treatment.
- Ask for the account-specific calculation. Contact HR or the plan administrator and request your current vested percentage, the service date and counting method used, and how the unvested amount would be treated if your employment ended.
- Check the plan document if needed. If the SPD and statement do not answer a specific question, ask the administrator for the governing plan language or relevant amendment. The documents and account history—not a generic schedule example—determine your result.
For general U.S. federal guidance, see the IRS pages on vesting, 401(k) plan vesting schedules, Summary Plan Descriptions, plan vesting rules and forfeitures, and plan termination.
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