401(k) vesting: schedules, years of service and what you keep when you leave

401(k) vesting is the rule that decides how much of your employer's contributions you get to keep if you leave the job. The money you defer from your own paycheck is always 100% vested from day one. Employer contributions, such as a matching or profit sharing contribution, can be subject to a vesting schedule that gives you ownership gradually over a few years, or all at once after a set period.

If you leave before you are fully vested, the unvested part of the employer money is forfeited back to the plan. That makes vesting one of the few 401(k) details with a direct, date-specific cash value, and it is worth knowing exactly where you stand before you resign, accept an offer or plan a retirement date. This guide explains the federal rules, how plans count years of service, the events that force full vesting, and how to read your own schedule. It is general education; your plan document governs, so check it alongside your summary plan description.

Which money is vested and which is not

A 401(k) account usually holds several sources of money, and each can have its own vesting rule. Your statement or online account should show them separately.

Contribution source	Vesting rule
Your pre-tax or Roth salary deferrals	Always 100% vested
Catch-up contributions	Always 100% vested
Rollovers in from other plans or IRAs	Always 100% vested
After-tax employee contributions	Always 100% vested
Employer matching contributions	May follow a vesting schedule
Employer profit sharing or nonelective contributions	May follow a vesting schedule
Traditional safe harbor contributions	100% vested immediately
QACA safe harbor contributions	Fully vested after no more than 2 years of service
SIMPLE 401(k) employer contributions	100% vested immediately

Investment earnings follow the money they grow on. Earnings on your deferrals are always yours; earnings on an unvested match vest on the same schedule as the match itself.

The two federal vesting schedules

Under IRC §411(a), a defined contribution plan such as a 401(k) has to vest employer contributions at least as fast as one of two minimum schedules. The IRS describes them as a 3-year cliff and a 6-year graded schedule.

Cliff vesting. You are 0% vested until you complete three years of service, then 100% vested at once. Leave after two years and eleven months and you keep none of the employer money; stay one more month and you keep all of it.

Graded vesting. Ownership builds in steps, starting no later than two years of service and reaching 100% by six years:

Years of service	Minimum vested percentage (graded)
Fewer than 2	0%
2	20%
3	40%
4	60%
5	80%
6 or more	100%

These are the slowest schedules the law allows. A plan can always be more generous, and many are. Immediate vesting, a two-year cliff, or a faster graded schedule are all common. Some employers use generous vesting as a recruitment tool; others use a longer schedule to encourage people to stay.

Defined benefit pension plans have their own, longer minimums: a 5-year cliff or a graded schedule running from three to seven years. If you have both a pension and a 401(k) with the same employer, the two can vest on different timetables. Our guide to the cash balance plan covers a hybrid design that follows its own vesting rule.

How a year of service is counted

The schedules run on years of service, not calendar years in the job, and the plan document defines how those years are measured. Two methods are common.

Hours counting. The plan credits a year of vesting service for any 12-month vesting computation period in which you work at least 1,000 hours. The computation period might be the plan year, the calendar year or your employment anniversary year. Someone who joins in late autumn under a calendar-year computation period might not reach 1,000 hours in their first partial year, which can delay vesting by a full year.

Elapsed time. Service is measured from your hire date to your termination date regardless of hours worked, with rules for gaps. This is simpler for full-time employees and avoids the partial-year trap.

A few other points can matter:

• Service before age 18 can generally be excluded from vesting service.
• Service before the plan existed can sometimes be excluded, depending on the plan terms.
• Long-term part-time employees who become eligible under the SECURE Act rules receive vesting credit for years with at least 500 hours, under rules that changed recently. If you work part-time, ask the administrator how your years are being counted.
• Prior employers in a merger or acquisition may or may not count. Check what the plan says, because acquisition terms vary.

Events that force full vesting

The law requires 100% vesting in some situations regardless of your years of service:

• Reaching normal retirement age as defined in the plan. This is commonly 65 but can be set differently in the plan document.
• Full termination of the plan. If the employer ends the plan, all affected participants become fully vested.
• Partial termination. If a significant share of participants lose coverage, typically through layoffs or a business closure, affected participants must be fully vested. The IRS generally presumes a partial termination has occurred when more than 20% of plan participants are terminated by the employer in a plan year, though the facts and circumstances can shift the outcome.

Many plans also choose to fully vest participants on death or disability. That is a plan design choice rather than a federal requirement, so read your plan's terms.

The partial termination rule is the one most people do not know about. If you are laid off as part of a large reduction in force and your statement still shows an unvested balance, it is worth asking the plan administrator whether a partial termination has been considered for that year.

What happens to unvested money when you leave

When you separate from service before being fully vested, the unvested employer contributions are forfeited. Forfeitures stay in the plan and the employer uses them as the plan document allows, typically to pay plan administrative expenses, reduce future employer contributions, or reallocate among remaining participants.

The timing of a forfeiture depends on the plan. Many plans forfeit the unvested balance when you take a distribution of your vested account, or after a period of absence measured in breaks in service. A one-year break in service generally means a computation period in which you work 500 hours or fewer.

Coming back to the same employer

If you are rehired, your earlier service may count again toward vesting. The rules here are technical. Broadly, plans must restore prior vesting service if you return before a specified number of consecutive one-year breaks, and some plans let you restore a forfeited unvested balance if you repay a distribution you took. If you are considering returning to a former employer, ask the plan administrator for a written statement of how your earlier service and any forfeited balance would be treated.

A worked illustration

Consider an illustrative employee, Dana, whose plan matches 50% of deferrals up to a percentage of pay and uses the minimum graded schedule. After four years of service, Dana's account shows:

• Own deferrals and earnings: $40,000
• Employer match and earnings: $12,000

At four years, Dana is 60% vested in the match. If Dana left now, the vested balance would be $40,000 plus 60% of $12,000, or $47,200. The remaining $4,800 would be forfeited. If Dana stayed long enough to complete a fifth year of service, the vested percentage would rise to 80%; after six years, Dana would keep the whole match.

The figures are illustrative only. The point is the method: identify each source, apply its vesting percentage, and add up what is genuinely yours. Then compare that with the value of any signing bonus or pay rise at a new employer.

Vesting and your exit decisions

Because vesting is date-based, a few practical checks pay off before you leave a job.

Find the exact vesting date. Ask for your vesting service to date and the date you will next move up the schedule. If you are three weeks short of a cliff, that information is worth having before you set a resignation date.

Count the full value. Unvested money is not just this year's match. It includes every unvested employer contribution and the earnings on it, which can be a meaningful sum after a few years.

Negotiate with the new employer. Some employers will offer a sign-on payment to compensate for forfeited retirement money. It is a reasonable conversation to have if you can document the amount.

Plan the rollover. Only the vested balance can be rolled over or distributed. Our 401(k) rollover guide explains your options for the vested amount once you leave.

Watch outstanding loans. If you have a plan loan, leaving can trigger repayment or a loan offset. The 401(k) loan guide covers what happens to a loan at separation and the deadline for rolling over an offset amount.

Think about age 55. If you are near 55 and leaving, the rule of 55 may let you take penalty-free withdrawals from that employer's plan. Vesting decides how much is available; the rule of 55 decides whether early access is penalty-free.

How to check your own vesting status

Your plan must give you a summary plan description that explains the vesting schedule and how service is counted. Your periodic benefit statement should show your vested balance or vested percentage. If the two are unclear, ask the plan administrator in writing for:

1. Your years of vesting service credited to date.
2. Your vested percentage in each contribution source.
3. The vesting computation period and the date your next year of service will be credited.
4. Whether death, disability or a layoff would accelerate vesting under the plan.

Plan rules and federal guidance change from time to time, so confirm the current position with your plan administrator before making a decision that depends on it.

Frequently asked questions

Is my own 401(k) money ever subject to vesting?

No. Salary deferrals, whether pre-tax or Roth, and the earnings on them are always 100% vested. So are rollovers into the plan and catch-up contributions. Vesting schedules only apply to employer contributions such as matching and profit sharing contributions.

What is the difference between cliff and graded vesting?

Cliff vesting gives you nothing until you complete a set period, at most three years for a 401(k), and then 100% at once. Graded vesting gives you ownership in steps, at least 20% after two years and rising to 100% by six years. Plans can be more generous than either minimum.

Do I lose my unvested match if I am laid off?

Generally yes, unless the plan fully vests on layoff or the layoff is part of a partial plan termination. The IRS generally presumes a partial termination when more than 20% of participants are terminated by the employer in a plan year, and affected participants must then be fully vested.

Does vesting affect when I can withdraw money?

Vesting decides how much belongs to you, not when you can take it. Withdrawal timing depends on separate rules, such as leaving your job, reaching 59½, hardship provisions or plan loans. You can only ever withdraw or roll over the vested portion.

This article is general education, not personal financial, tax or legal advice. Your plan document and summary plan description control how vesting works in your plan, so check them and speak to a qualified professional before making a decision that depends on vesting.