What to Do With Your 401k When You Leave a Job

The average person changes jobs 12 times during their career, according to the Bureau of Labor Statistics. Each time, there is a 401(k) decision waiting. The wrong choice can cost tens of thousands of dollars in taxes, penalties, and lost growth.

Most people either do nothing (forgetting about old accounts scattered across former employers) or cash out (the worst option). Neither is a strategy. One leaves your money in accounts you stop monitoring, and the other permanently destroys years of progress.

This post covers the four options for your 401(k) when you leave a job, how to choose between them, and the tax traps that catch people who act without understanding the rules. All contribution limits and thresholds reflect 2026 IRS figures.

The Four Options Explained

Option 1: Leave It With Your Former Employer

When this makes sense: your old plan has low fees, good investment options, and your balance is above $7,000. If the plan offers institutional-class funds with expense ratios below 0.10%, it may be cheaper than what you can get in an IRA.

Downsides: you cannot make new contributions. You may lose access to 401(k) loans. Perhaps most importantly, it becomes easy to forget. An account you do not check is an account you are not managing. You may miss rebalancing opportunities or fail to update beneficiary designations after life changes.

IRS rule: if your balance is over $7,000, your former employer must keep it in the plan unless you provide instructions to move it. This threshold was set by the SECURE Act and remains in effect for 2026.

Option 2: Roll It Into Your New Employer's Plan

When this makes sense: your new employer's plan accepts rollovers and offers good investment options with reasonable fees. This is often the cleanest option because it consolidates your retirement savings into one account.

Advantage: consolidation means one statement, one set of investments to monitor, and one rebalancing schedule. If you are still working at age 73, the "still-working exception" lets you delay required minimum distributions (RMDs) from that employer's plan. This exception does not apply to IRAs or to money held in former employers' plans.

Downsides: new plans may have a waiting period before you can roll money in. Investment choices are limited to what the plan offers, which may not include the specific funds you want.

Option 3: Roll It Into an IRA

When this makes sense: you want the widest possible investment selection, lower fees than your employer plan, or you are retiring and not joining a new employer's plan.

Advantage: an IRA at a major brokerage (Fidelity, Vanguard, Schwab) gives you access to nearly any mutual fund, ETF, or individual stock. You also get more flexibility on withdrawal timing and methods. For 2026, the IRA contribution limit is $7,500 with a $1,000 catch-up for those 50 and older.

Downsides: you lose the 401(k) loan feature (IRAs do not allow loans). IRA contribution limits are much lower than 401(k) limits ($7,500 vs $24,500 in 2026), though this only matters if you are still working and want to keep contributing. You also lose the Rule of 55 benefit (explained below). If you are considering a Roth conversion, rolling pre-tax 401(k) money into a traditional IRA sets up that possibility. See our guide on the backdoor Roth IRA for how this works.

Option 4: Cash It Out

When this makes sense: almost never. The only scenario where cashing out might be defensible is a genuine financial emergency where you have exhausted all other options, and even then, a 401(k) loan (if still employed) or a hardship withdrawal may be better.

The cost: if you are under 59.5, you face a 20% mandatory federal withholding plus a 10% early withdrawal penalty plus ordinary income tax on the full amount. State taxes may apply on top.

For a $50,000 balance cashed out at age 35: you might receive $35,000 after federal withholding, then owe another $2,000 to $5,000 at tax time (depending on your bracket), plus the 10% penalty of $5,000. Your net might be $28,000. But the real cost is the lost growth. $50,000 invested at 7% for 30 years becomes $380,000. You are trading $380,000 of future wealth for $28,000 today.

Fidelity's guide on 401(k) options provides additional detail on each of these paths. For a deeper comparison of account types, see our 401(k) vs Roth IRA analysis.

The Balance Thresholds That Decide For You

If you do nothing when you leave a job, your former employer will act based on your account balance. The IRS has established three thresholds:

Under $1,000: The employer can automatically cash you out. A check is mailed to you, and the 20% mandatory withholding applies. If you do not roll it over within 60 days, you owe the 10% penalty (if under 59.5) plus income tax on the full amount.

$1,000 to $7,000: Under a SECURE Act provision, the employer can automatically roll your balance into an IRA on your behalf. This sounds helpful, but the default IRA is typically a conservative, low-yield investment (often a money market or stable value fund) that loses ground to inflation over time. You may not even know the account exists until you receive a tax form the following year.

Over $7,000: The employer must keep your money in the plan unless you provide instructions to move it. Your account stays invested in whatever funds you selected, but you cannot contribute to it and may lose loan access.

The takeaway: if you do nothing, your money may end up in a default IRA with investments you did not choose, earning returns that do not keep up with inflation. Taking 30 minutes to make an active decision is far better than letting default rules control your retirement savings. For context on opening a new account to receive a rollover, see our guide on how to open a brokerage account.

Direct vs Indirect Rollover

If you choose to roll your 401(k) into an IRA or a new employer's plan, you have two methods. The difference between them has significant tax consequences.

Direct rollover: The money moves from your old 401(k) directly to your new account. You never touch the money. No taxes are withheld. This is the clean, simple method. You initiate the transfer through your new provider, and they coordinate with your old plan. The entire balance arrives in your new account intact.

Indirect rollover: Your old employer sends the check to you. The IRS requires 20% mandatory withholding, so if your balance is $40,000, you receive a check for $32,000. The $8,000 goes to the IRS as a tax deposit. You then have 60 days to deposit the full $40,000 (not $32,000) into a new retirement account. To complete the rollover, you must make up the $8,000 difference from your own pocket.

If you deposit the full $40,000 within 60 days, the $8,000 withholding is refunded to you when you file your taxes. If you only deposit $32,000, the $8,000 is treated as a taxable distribution. If you are under 59.5, that $8,000 also gets hit with the 10% penalty.

If you miss the 60-day window entirely, the entire $40,000 becomes a taxable distribution. The 10% penalty applies if you are under 59.5.

The IRS publishes detailed rollover rules that cover these scenarios. Always choose a direct rollover when possible. It eliminates the 60-day deadline risk and the 20% withholding complication entirely.

Special Situations

You Have a 401(k) Loan

If you took a loan from your 401(k) and leave your job, the loan must be repaid by the tax filing deadline of the year you leave (including extensions). For example, if you leave in January 2026, you have until April 15, 2027, or October 15, 2027 with an extension, to repay the full balance.

If the loan is not repaid in time, it becomes a "deemed distribution." The outstanding balance is treated as a taxable withdrawal, and if you are under 59.5, the 10% penalty applies on top. Some plans allow you to continue making loan payments after leaving, but many do not. Check your plan documents before assuming anything.

You Are 55 or Older (Rule of 55)

If you leave your employer at age 55 or later, you can take penalty-free withdrawals from that specific employer's 401(k) plan. This is the Rule of 55, and it only applies to the 401(k) of the employer you are leaving. It does not apply to IRAs, and it does not apply to 401(k) balances from previous employers.

If you roll your 401(k) into an IRA, you forfeit this benefit. The penalty-free withdrawal age for IRAs is 59.5, full stop. For someone retiring at 56 or 57, keeping money in the employer plan to access the Rule of 55 can save tens of thousands in penalty costs.

You Have After-Tax (Roth) 401(k) Contributions

Roth 401(k) contributions (after-tax money that grows tax-free) can be rolled into a Roth IRA tax-free. The rollover does not trigger any tax liability, and the money continues to grow tax-free in the Roth IRA.

Pre-tax 401(k) funds rolled into a Roth IRA trigger a taxable conversion. The entire amount moved is treated as ordinary income in the year of the conversion. This can create a massive tax bill if the balance is large. If you want to convert pre-tax money to Roth, do it deliberately and with a tax plan, not accidentally through a rollover mistake. See our guide on Roth IRA tax savings for more on how Roth accounts work.

Your 401(k) Options Compared

Real-World Examples

Example: Jasmine, 28, changing jobs

Situation: Jasmine has $14,000 in her old employer's 401(k). Her new employer's plan has low-cost index funds (expense ratios under 0.05%) and accepts rollovers.

What she did: Initiated a direct rollover from the old plan to the new plan. The money moved in about 10 days with no tax consequences. She is now contributing to the new plan and has one consolidated account.

Result: Clean, simple, no tax issues. She avoided the indirect rollover trap entirely by having the new plan administrator handle the transfer.

Example: Mark, 52, laid off and taking 6 months off

Situation: Mark has $187,000 in his 401(k). He was laid off and plans to take 6 months off before starting a new job search. His old plan has decent investment options and reasonable fees.

What he did: Left the money in the old plan for now. His balance is well above $7,000, so the employer cannot force him out. He plans to roll it into his next employer's plan once he starts a new job.

Result: No rush, no tax event. When he starts his new job, he will do a direct rollover. The money stays invested during his gap period.

Example: Susan, 58, retiring early

Situation: Susan has $340,000 in her 401(k) and is retiring at 58. She wants penalty-free access to her money before 59.5.

What she did: Kept the money in her employer's 401(k) plan to use the Rule of 55. She can now take penalty-free withdrawals from this plan. If she had rolled the money into an IRA, she would have to wait until 59.5 to access it without the 10% penalty.

Result: Susan withdraws $30,000/year from the 401(k) penalty-free (though she still pays ordinary income tax on the withdrawals). She avoids $3,000/year in penalty costs that she would have faced in an IRA.

Common Mistakes

Cashing out "just this once" because the balance seems small. Even $5,000 cashed out at age 30 costs more than $50,000 in lost growth by age 65 (at 7% returns). Small balances are the most tempting to cash out and the most damaging over time, because the growth period is longest.

Doing an indirect rollover and missing the 60-day deadline. Life happens. People get sick, travel, or simply forget. A missed deadline turns a tax-free transfer into a fully taxable distribution, complete with penalties. Direct rollovers eliminate this risk entirely.

Forgetting about old 401(k) accounts. They do not follow you automatically. According to the National Association of State Treasurers, there are billions of dollars in forgotten retirement accounts. Check the National Registry of Unclaimed Retirement Benefits if you think you may have lost track of an old account.

Rolling pre-tax money into a Roth IRA without understanding the tax bill. This triggers a Roth conversion, and the entire amount is taxable as ordinary income in the year of the rollover. A $100,000 conversion could add $22,000 or more to your tax bill depending on your bracket. Always confirm whether your 401(k) funds are pre-tax or Roth before initiating any rollover.

Conclusion

For most people, rolling into a new employer plan or an IRA is the right move. Cashing out is almost always wrong, and leaving money scattered across multiple old plans makes it harder to manage your retirement strategy.

The decision takes about 30 minutes of research but can affect decades of growth. If you are considering a rollover, compare your options using our Roth vs Traditional IRA calculator, and check the 401(k) glossary definition for a quick refresher on how these accounts work.

Share this with someone changing jobs, and bookmark it for your own next career move.

This post is for informational purposes only and does not constitute financial advice. Consult a qualified financial advisor or tax professional before making retirement account decisions.