401(k) Vesting: What You Keep

Your own 401(k) contributions are always 100% yours — but the employer match can be on a vesting schedule, and if you leave before it’s done, you forfeit the unvested part. Two standard schedules exist: cliff vesting (0% for 2 years, then 100% at year 3) and graded vesting (20% per year from year 2, fully vested at year 6). A “year of service” is usually 1,000 hours worked in 12 months. Your specific plan document sets the rules — check it before making job-change decisions around the match.

TL;DR

• Your contributions: always 100% yours, from day one — the employer can never take back your own deferrals
• The match is on a schedule: cliff = 100% at 3 years; graded = 20%/year from year 2, 100% at year 6
• Leaving early = forfeiting the unvested match: at 2 years on a graded schedule you keep 20% of the match, lose 80%
• A “year of service” is typically 1,000 hours worked within 12 months

What vesting actually means

Vesting is ownership. A 401(k) has two kinds of money:

1. Your own contributions — the salary deferrals you elect. These are always 100% vested; the employer can never forfeit them[1].
2. Employer contributions — the match, profit-sharing, or other employer money. These can be on a vesting schedule: you earn ownership gradually over years of service[2].

This is the part that surprises people. You can see a healthy “total balance” on your statement that includes the match, then leave your job and discover a chunk of it isn’t actually yours yet.

The two standard schedules

Federal law caps how slow a plan can vest you[1]:

Years of service	Cliff vesting	Graded vesting
1	0%	0%
2	0%	20%
3	100%	40%
4	100%	60%
5	100%	80%
6	100%	100%

• Cliff vesting: nothing for the first two years, then 100% at year 3. Leave at 2 years 11 months and you forfeit the entire unvested match.
• Graded vesting: you earn 20% more of the employer match each year from year 2. Leave at year 3 and you keep 40%; leave at year 5 and you keep 80%.

Federal law caps the maximum schedule (cliff: 3 years; graded: 6 years), but employers can vest faster — immediate vesting is allowed and common at many companies. Your plan document decides. You’re also always 100% vested once you reach normal retirement age or if the plan is terminated[3].

Here’s the same two schedules side by side:

What a “year of service” means

A year of service is typically 1,000 hours worked within a 12-month period[3] — roughly 20 hours a week. Part-time and seasonal work can stretch the vesting timeline. Some plans count only full years; check your plan’s definition.

That detail matters more than it looks: two part-time years might not equal two “years of service” for vesting, which can delay your vesting date by a full year.

The real cost of leaving early

Here’s the math on what cliff vesting can cost:

• Your employer matches 50% up to 6% of your salary.
• You earn $60,000/year and contribute 6% ($3,600). Your match is 50% of that = $1,800/year.
• Over 2.5 years on a cliff schedule, you’ve accumulated $4,500 in match — but you’re 0% vested, so leaving forfeits the entire $4,500[4].

That’s not a tax penalty or a fee — it’s money your employer contributed that reverts to the plan because you left before the vesting clock finished. The flip side: it’s a reason to check the schedule before you leave, not an argument to stay in a job you’d otherwise quit. A few thousand in match rarely justifies staying somewhere that’s wrong for you.

Show the math

$60,000 × 6% = $3,600 contributed. Match at 50% = $1,800/year. Over 2.5 years = $4,500 accumulated. At 0% vested (cliff, before year 3), forfeited = $4,500. At 20% vested (graded, year 2), forfeited = $4,500 × 80% = $3,600.

How to check your vesting status

1. Log into your 401(k) portal — most plans show “vested balance” vs “total balance” directly.
2. Read the Summary Plan Description (SPD) — it states the exact schedule and how service is counted.
3. Ask HR for your vesting percentage before making a decision — they can tell you your years of service and current vested %.

If you’re close to a cliff (say, 2 years 9 months of a 3-year cliff), the math of waiting a few months for full vesting can be worth a real conversation. If you’re at 20% graded, the decision is usually about the job, not the match. Either way, the 401(k) Match Calculator shows what the match is worth so you can weigh it honestly, and the 401(k) or Roth IRA? tool helps with what comes next. For the full job-change picture, see what happens to your 401(k) when you change jobs, and start from the Retirement Accounts hub.

FAQ

Bottom line

Vesting is the one 401(k) rule that can silently cost you money at the exact moment you’re changing jobs. The simple version: your money is always yours; the match is yours only as fast as the schedule says. Know your plan’s schedule (cliff vs graded), know your years of service, and check your vested balance before you make a job decision. If you’re a few months from a cliff, the math may favor waiting — and if you’re not, roll your vested balance over and move on without a second thought. The 401(k) Match Calculator turns your match into a dollar figure worth protecting, and what happens to your 401(k) when you change jobs covers the rollover steps that come next.