What Happens to Your 401(k) When You Leave a Job

Updated October 29, 2026 · 5 min read

Your 401(k) doesn't disappear when you leave a job. Your own contributions are always yours. But a few rules kick in when you leave, and some of them have deadlines.

What you keep

Everything you contributed from your paycheck, plus its growth, is always 100% yours. Employer matching and profit-sharing contributions depend on your plan's vesting schedule. If you leave before you're fully vested, you forfeit the unvested part. Check your plan statement before you set your last day, because a few more weeks can sometimes make a difference.

Small balances can be moved for you

If you have a 401(k) loan

An unpaid 401(k) loan is often due when you leave. If it isn't repaid, the plan subtracts it from your balance as a "loan offset," which is taxed like a withdrawal. You can avoid that by depositing the same amount into an IRA by your tax filing deadline for that year, including extensions.

The rule of 55

If you leave your job during or after the year you turn 55, withdrawals from that employer's 401(k) aren't subject to the 10% early withdrawal penalty. This only applies to the plan at the job you left. If you roll the money into an IRA, you lose this exception.

Your four options

You can leave the money in the old plan, roll it into an IRA, move it into your new employer's plan, or cash it out. Cashing out is usually the costliest. Compare all four options, or use our calculator to see what cashing out would cost you.

Lost track of an old account? Check old plan statements and contact your former employer's HR department. You can also search the Department of Labor's Retirement Savings Lost and Found database.

This guide is general information, not tax or financial advice. Talk to a qualified professional about your situation.

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