401(k) Rollovers: What to Do With an Old 401(k) When You Leave a Job

A 401(k) rollover moves your old workplace savings into another retirement account when you change jobs, and done correctly it costs you nothing in tax or penalties. You usually have four choices: leave the money where it is, roll it to your new employer’s plan, roll it to an IRA, or cash it out. This guide explains those options, the difference between a direct and an indirect rollover, the 60-day and 20% withholding traps that catch people out, and how rollovers differ from transfers.

This is the part of my own retirement planning I almost got wrong. I had two old 401(k)s sitting in plans I had forgotten, and when I finally moved them I came within a hair of triggering a needless tax bill. Here is what I learned, so you do not repeat my near-miss.

Your four options for an old 401(k)

When you leave a job, you generally have four things you can do with the old 401(k), and three of them are reasonable.

• Leave it where it is: if the balance is large enough and the plan allows it, you can do nothing for now. Fine as a holding pattern, but it is easy to lose track of (see finding lost retirement accounts).
• Roll it to your new employer’s 401(k): if the new plan accepts rollovers, this keeps everything in one place.
• Roll it to an IRA: this gives you the widest and often cheapest investment menu and full control. For many people it is the cleanest choice.
• Cash it out: before age 59½ this usually triggers income tax plus a 10% early-withdrawal penalty, so it is almost always the worst option.

There is no single right answer; it depends on the fees, the investment menu, and how much you value simplicity. We compare the account types in types of retirement accounts.

Direct versus indirect: the choice that matters most

The single most important decision is to do a direct rollover, where the money goes straight from one provider to the other and never passes through your hands. In a direct rollover, your old plan sends the funds to the new custodian, often as a check made payable to that institution for your benefit. No tax is withheld, and there is nothing for you to mess up.

An indirect rollover is the dangerous cousin. Here the check is made out to you, and by law the plan must withhold 20% for taxes. You then have 60 days to deposit the money into a new retirement account, or it counts as a taxable withdrawal. Given the choice, take the direct rollover every time. The IRS and the U.S. Department of Labor both describe it as the way to keep a rollover clean. When I moved my old accounts, I asked specifically for a direct, custodian-to-custodian transfer, and the whole thing was uneventful, which is exactly what you want.

The 60-day and 20% withholding traps

The indirect rollover hides two traps that can turn a routine move into a tax bill, so it is worth understanding them even if you never use one.

First, the 60-day rule: once a check is in your hands, you have just 60 days to redeposit the money into another retirement account. Miss the deadline and the whole amount becomes a taxable distribution, plus a 10% penalty if you are under 59½.

Second, the 20% withholding trap, which is sneakier. Say your old 401(k) holds $50,000. In an indirect rollover the plan sends you a check for $40,000 and withholds $10,000. To complete a full rollover and avoid any tax, you must deposit the entire $50,000 within 60 days, which means finding the missing $10,000 from your own savings. You reclaim that $10,000 when you file your taxes, but until then it is your money funding the gap. Deposit only the $40,000 you received, and the IRS treats the missing $10,000 as a taxable withdrawal. A direct rollover sidesteps both traps completely, which is the whole reason to prefer it.

Rollover versus transfer: what is the difference?

A transfer moves money between two accounts of the same type directly between custodians, while a rollover moves it out of a 401(k) or between different account types, but done directly, both avoid tax. A common example of a transfer is moving money from one IRA to another IRA: the custodians handle it between themselves and the IRS does not even treat it as a distribution.

In everyday practice, a direct rollover and a transfer feel almost the same: you fill in a form, the institutions talk to each other, and you never touch the money. The vocabulary matters mostly because it changes how the move is reported and, for IRA-to-IRA moves, how often you can do it. The practical rule is the same one as above: keep the money moving directly between providers and the tax risk stays at zero.

How to avoid taxes and penalties

The safe recipe is short: do a direct rollover, match the account types, and never cash out early. A few rules keep you out of trouble:

• Match the tax treatment. Rolling a traditional 401(k) into a traditional IRA or another pre-tax plan keeps it tax-deferred, with no tax due now. Rolling a traditional 401(k) into a Roth IRA is a conversion, and the amount is taxed as income that year, so plan for the bill.
• Use direct rollovers to dodge the 20% withholding and the 60-day clock entirely.
• Do not cash out before 59½ unless you truly must, because of the tax-plus-10%-penalty hit. The penalty-free access rules are covered in accessing your retirement savings.

This is general information, not personalized tax advice, and the figures here are current rules that can change, so confirm them with the IRS or a tax professional for your own situation. Rolling old accounts into one place also makes the rest of planning easier, from keeping fees low to setting beneficiaries. If you are still gathering your accounts together, how to start saving for retirement covers the wider order of operations.