What Should You Do With an Old 401(k)?

Leaving a job — whether for a new one or for retirement — comes with a long to-do list. Updating your address, returning your badge, figuring out health coverage. And then, somewhere in the middle of all of it, someone mentions your 401(k).

Most people put that decision off. The money is still there, so it feels fine to wait. But where your old 401(k) sits — and how it's managed — can have a real impact on your retirement income years from now. The good news: you have four options, and none of them are complicated once you understand what each one actually means.

The Four Options

1. Leave it where it is

If your old employer allows it, you can leave the money in their 401(k) plan. Many plans require a minimum balance — often $5,000 — to keep your account open after you leave.

When this makes sense: Your old plan has strong investment options at low fees. Some large employer plans offer institutional-class funds that individuals cannot access on their own. If you have a good plan with low costs, there is no urgency to move it.

The trade-off: You no longer work there. The plan administrator changes, the investment menu may shift, and you will need to track the account separately from your other retirement savings. If you leave several jobs over a career, you can end up with accounts scattered across multiple old plans — which makes retirement income planning harder.

2. Roll it into your new employer's 401(k)

If you are moving to a new job and the new plan accepts incoming rollovers, you can transfer the balance directly.

When this makes sense: You want to consolidate everything in one place, your new plan has solid investment options, and the plan allows rollovers from outside accounts. Keeping everything in one 401(k) also makes it easier to manage Required Minimum Distributions (RMDs) — the withdrawals the IRS requires you to take starting at age 73. Unlike IRAs, if you are still working at 73, you may be able to delay RMDs from your current employer's plan.

The trade-off: If the new plan has limited investment choices or higher fees, you may be better served by rolling into an IRA instead.

3. Roll it into an IRA

This is the most common move — and for many people, it is the right one. A direct rollover transfers your 401(k) balance into an Individual Retirement Account (IRA) without any taxes or penalties, as long as the money goes directly from plan to plan.

When this makes sense: You want more control over your investment options, you are consolidating multiple old accounts, or you are retired and want a single account to draw retirement income from.

The trade-off to think through: IRAs do not have the same federal legal protections as 401(k) plans in bankruptcy proceedings, though most states provide strong IRA protections as well. Also, if you are 55 or older and leave your job, you can withdraw from your 401(k) without the 10% early withdrawal penalty under something called the Rule of 55. That rule does not apply to IRAs, which require you to wait until 59½ for penalty-free withdrawals. If you might need access to the money before 59½, this matters.

You can open an IRA at most banks, credit unions, or brokerage firms. The IRS website atIRS.govhas current information on contribution limits and rollover rules if you want to verify the specifics.

4. Cash it out

You can take the money as a lump sum. This is the option most people do not fully think through — and the one that most often leads to regret.

If you cash out before age 59½, you will owe ordinary income tax on the full amount, plus a 10% early withdrawal penalty. On a $60,000 balance, that could mean losing $15,000 to $20,000 or more depending on your tax bracket.

Even after 59½, cashing out means the money is no longer invested, no longer growing, and will be counted as ordinary income in the year you withdraw it — which could push you into a higher tax bracket.

When this might make sense: A genuine financial emergency with no other options. That is about it.

The Consumer Financial Protection Bureau (CFPB) atConsumerFinance.govhas plain-English resources on understanding retirement account withdrawals if you want to read more before making any decisions.

The One Thing Most People Miss

When people compare these four options, they focus on the big questions: fees, investment choices, convenience. Those matter. But the question that often gets skipped is: what is this money actually for, and when will I need it?

If you are 58 and just left a job, and you might need to tap this money in the next year or two, keeping it in a 401(k) under the Rule of 55 could save you a 10% penalty. If you are 64 and have five other accounts spread across three old employers, rolling everything into one IRA might simplify your retirement income planning more than any investment change ever could.

The right move is not the same for everyone. It depends on your age, your other accounts, when you need the money, and the quality of the plans involved.

A Note on How to Roll Over

If you do decide to roll over — to either a new 401(k) or an IRA — ask for adirect rollover. This means the check is made out to the new institution, not to you. If the check is made out to you, your old plan is required to withhold 20% for taxes. You can still complete the rollover, but you have to come up with the withheld amount out of pocket within 60 days or it counts as a taxable distribution.

Bottom Line

You have four options. Two of them — leaving it or rolling it over — are almost always fine. One of them — rolling into an IRA — is often the most flexible long-term choice. And one of them — cashing out — costs more than it looks like on paper.

There is no deadline pressing you to decide in the first week after leaving a job. Take the time to understand what you have, what your options are, and what makes sense for your situation. Then make the move that fits — not the one that was easiest to explain at the exit interview.