What is 401(k) vesting?

When you contribute to a 401(k) at work, your employer may add money too — that's the 'match.' But there's a catch worth understanding: some of that employer money isn't fully yours until you've stayed at the company long enough. That waiting period is called 'vesting.' It's one of the most misunderstood parts of a first job, and this guide clears it up.

How vesting schedules work

• Immediate vesting: the employer match is fully yours right away. Nothing to wait for.
• Cliff vesting: you own 0% of the match until you hit a milestone (say, three years), then 100% all at once.
• Graded vesting: you own a growing share each year — for example, 20% more per year until you're fully vested after five years.

Why employers do this

Vesting is an incentive to stay. By tying the match to time on the job, employers encourage employees to stick around. It's not a trick — it's a common, disclosed part of many retirement plans. The key is simply to know your plan's schedule so you can factor it into decisions.

The bottom line

Vesting decides how much of your employer's 401(k) match you get to keep based on how long you stay. Your own contributions are always fully yours; the match may vest immediately, on a cliff, or gradually. Knowing your schedule helps you understand what you'd walk away from if you left — and it's rarely a reason to skip the match, which is still one of the best deals in personal finance.