What To Do With Your Old 401(k) When You Leave a Job

Your old 401(k) has four main paths forward

When you leave a job, your 401(k) stays behind — but you control what happens to it. You can leave it where it is, roll it into your new employer's plan, move it to an IRA, or cash it out. Each choice has different tax consequences and affects how much you'll pay in fees. The right move depends on your new job, how much money is in the account, and whether you need the cash now.

The worst choice is usually doing nothing and forgetting about it. Old 401(k)s charge fees whether you use them or not, and if your balance falls below a certain threshold — often $5,000 — your former employer may force you out and send you a check, which triggers taxes and penalties if you're under 59½.

Key Takeaways

• Leaving your 401(k) at your old employer costs money in annual fees but lets you keep the same investments and avoid when ready tax bills.
• Rolling into your new employer's 401(k) consolidates your accounts but only works if the new plan accepts rollovers and you like its investment options.
• Rolling into a traditional IRA gives you the most investment choices and usually the lowest fees, but complicates future Roth conversions and backdoor Roth contributions.
• Cashing out before age 59½ triggers a 10% penalty plus income tax on the full amount, and you lose years of tax-deferred growth.
• If your old employer forces you out with a small balance, you have 60 days to roll it over or face when ready taxation.

Leaving your 401(k) at your former employer

Your old employer must let you keep your money in the plan after you leave, as long as your balance is above the plan's minimum — usually $5,000. You keep the same investments, the same account statements, and the same rules. No tax bill arrives, and you don't have to move anything.

The catch is fees. You'll pay annual administrative charges, investment fees, and possibly a per-transaction fee for each trade. These add up over time, especially if you're not watching the account. You also can't add new money to it, so if you want to keep contributing to a 401(k), you'll need to use your new employer's plan or open an IRA instead.

This option works best if your old plan has low fees, strong investment options, and you plan to stay in the same job for several years. It's also useful if you're under 59½ and might need to withdraw money soon — leaving it in a 401(k) lets you use the "rule of 55" to withdraw without the 10% penalty, whereas an IRA does not.

Rolling over to your new employer's 401(k)

If your new job offers a 401(k), you can roll your old balance directly into it. This is called a direct rollover — the money moves from one plan to the other without touching your hands, so there's no tax bill and no 60-day important date to worry about.

Before you do this, check two things: whether the new plan accepts rollovers (most do, but some don't), and whether you like the investment options. If the new plan has high fees or limited funds, rolling over just consolidates your money into a worse place. You can always roll it to an IRA later, but that creates extra steps.

Rolling into your new 401(k) makes sense if the plan has low fees, good investment choices, and you want one straightforward account to manage. It also keeps your money in a 401(k) structure, which means you can still use the rule of 55 if you leave this job at 55 or older.

Rolling over to a traditional IRA

A traditional IRA rollover moves your old 401(k) into an IRA at a bank, brokerage, or investment firm. The money stays tax-deferred, and you get access to thousands of investment options instead of the 10 to 30 funds a 401(k) usually offers. IRA fees are typically lower than 401(k) fees, especially if you open the account at a low-cost provider like Vanguard, Fidelity, or Schwab.

The trade-off is complexity. If you ever want to do a backdoor Roth contribution — a way to fund a Roth IRA when your income is too high — having a traditional IRA with a large balance makes it more expensive and complicated. The same applies if you want to do a Roth conversion later. These situations don't affect most people, but they're worth knowing about before you roll over.

A traditional IRA rollover is the most common choice for people who want low fees, broad investment options, and simplicity. You have 60 days from the day you receive the money to deposit it into the IRA, or you'll owe taxes and penalties on the full amount.

Cashing out your 401(k)

You can withdraw the money and take it as a check. If you're 59½ or older, you owe income tax on the amount but no penalty. If you're younger, you owe both income tax and a 10% early withdrawal penalty — so a $50,000 balance might net you only $35,000 after taxes and penalties, depending on your tax bracket.

Cashing out also means you lose all the money's future growth. If that $50,000 would have grown to $200,000 by retirement, you've given up $150,000 in gains. This is the most expensive option for almost everyone, and it should only happen if you have a genuine emergency and no other way to cover it.

One exception: if your old employer forces you out because your balance is small — usually under $5,000 — and you don't roll it over within 60 days, the plan will cash you out automatically and send you a check. If this happens, you still have 60 days to roll that check into an IRA to avoid the tax bill.

What happens if your employer forces you out

If your balance is below your plan's minimum threshold, your former employer can force you out. They'll send you a check for the full amount. You then have 60 days to roll it into an IRA or another 401(k) — if you don't, the full amount becomes taxable income and you'll owe a 10% penalty if you're under 59½.

The 60-day clock starts when you receive the check, not when the employer sends it. If the check arrives on a Friday and you deposit it the following Monday, you've used up three days. Mark your calendar and don't delay. If you miss the important date by even one day, the IRS will not waive the penalty in most cases.

Some employers offer a direct rollover even for small balances, which bypasses the 60-day window entirely. Ask your former employer's benefits department whether this is an option before accepting a check.

Comparing your options side by side

Option	Tax Bill Now	Typical Fees	Investment Choices	Best For
Leave at old employer	None	$50–200/year	10–30 funds	People under 59½ who might need to withdraw soon
Roll to new 401(k)	None	Varies by plan	10–30 funds	People who want one consolidated account
Roll to traditional IRA	None	$0–50/year	Thousands	People who want low fees and broad choices
Cash out	Income tax + 10% penalty (if under 59½)	None	N/A	Emergency only

How to execute a rollover

For a direct rollover, contact your new plan or IRA provider and ask for rollover instructions. They'll send you a form to give to your old employer's benefits department. Your old employer then sends the money directly to the new account — you never touch it, and there's no tax bill or important date to worry about.

For an indirect rollover, your old employer sends you a check. You deposit it into your new IRA or 401(k) within 60 days. The check will usually have "FBO" (for benefit of) language on it to signal it's a rollover, but the IRS doesn't care how the check is labeled — what matters is that you deposit the full amount into a may have access to account within 60 days.

If you're rolling to an IRA, you'll need to open one first. Most brokerages let you open an account online in 10 minutes. Choose a provider with low fees — Vanguard, Fidelity, and Schwab all charge nothing to open or maintain an IRA. Then provide your old employer with the new account details and let them send the money.

Frequently Asked Questions

Can I roll over a 401(k) if I'm still working at the company?

No. You can only roll over a 401(k) after you leave the job. While you're still employed, the money stays in the plan. Some plans offer an in-service rollover, which lets you move money to an IRA while still working there, but this is rare and your employer has to offer it.

What if I have multiple old 401(k)s from different jobs?

You can roll all of them into one IRA, one new 401(k), or split them however you want. Rolling them all into one IRA simplifies your life and usually lowers your total fees. Just make sure each rollover is a direct transfer from the old plan to the new one.

Do I have to roll over my 401(k) before I start my new job?

No. You can roll it over anytime after you leave — there's no important date except the 60-day rule if your old employer forces you out. Many people wait a few weeks to make sure they're happy with the new job before moving the money.

What if I owe taxes on the old 401(k)?

If the 401(k) contains pre-tax contributions (the usual case), you don't owe taxes until you withdraw the money in retirement. A rollover doesn't trigger a tax bill. If the account contains after-tax contributions, those portions are not taxed again, but you'll need to track them separately.

Can I roll over a 401(k) to a Roth IRA?

Yes, but you'll owe income tax on the full amount in the year you convert. This is called a Roth conversion. It makes sense only if you expect to be in a lower tax bracket that year or if you want the money to grow tax-free in retirement. Most people roll to a traditional IRA first and convert later if it makes sense.