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

Somewhere between the exit interview and the last day of health insurance, a piece of paperwork shows up asking what you want to do with your old 401(k). Most people either ignore it — leaving small accounts scattered across three or four former employers — or roll it over without really understanding what they gave up or gained in the process.

There's no universally right answer here. But there is a wrong way to decide: by default, under time pressure, without seeing the trade-offs side by side.

Your four options

When you leave a job, you generally have four choices for the money in your old employer's plan.

1. Leave it where it is

Most plans let you leave a balance above a minimum threshold in place indefinitely. This is the path of least resistance, and it's not automatically wrong — if your old plan has genuinely low-cost, well-diversified funds, there's no rush to move it.

The downside is fragmentation. Two or three old 401(k)s from past jobs, each with its own login, its own fund lineup, and its own beneficiary designation you haven't looked at in years, make it much harder to manage your investments as one coherent portfolio.

2. Roll it into your new employer's plan

If your new employer's 401(k) accepts incoming rollovers, this consolidates your retirement savings into a single account. It can also preserve certain protections (like the "still working" exception that lets you delay required minimum distributions past 73 if you're still employed there later in life).

The catch: you're limited to whatever fund lineup your new plan offers, and some employer plans carry higher administrative fees than a low-cost IRA would.

3. Roll it into an IRA

Rolling into a traditional (or Roth, if applicable) IRA generally gives you the widest range of investment choices and the most control over costs. This is the most common recommendation for people who want a single, consolidated account they manage — or have managed — deliberately.

The trade-off is that IRAs don't have the same creditor protection under federal law that employer plans do in every state, and you lose access to any plan loan provisions.

4. Cash it out

Cashing out is almost always the most expensive option. You'll owe ordinary income tax on the full distribution, plus a 10% early withdrawal penalty if you're under 59½, and you permanently lose the tax-deferred growth on that money. It's rarely the right move, even when the balance feels small.

Comparing the options

	Leave in old plan	New employer plan	Rollover IRA	Cash out
Investment choice	Limited to old plan's lineup	Limited to new plan's lineup	Widest range available	N/A
Consolidation	No	Yes, if accepted	Yes	N/A
Ongoing fees	Old plan's fee schedule	New plan's fee schedule	Often lower, but varies by provider	N/A
Tax impact today	None	None, if done as direct rollover	None, if done as direct rollover	Ordinary income tax + possible 10% penalty
Creditor protection	Strong (ERISA)	Strong (ERISA)	Varies by state	N/A

The best rollover decision isn't the one with the lowest fee or the widest fund menu in isolation — it's the one that fits into a plan for the rest of your retirement savings, not just this one account.

The mistake that costs people the most: indirect rollovers

If you request a distribution and the check is made out to you rather than directly to the new custodian, your old plan is required to withhold 20% for federal taxes. You then have 60 days to deposit the full original balance — including the 20% that was withheld — into the new account, or the withheld portion is treated as a taxable distribution (and possibly penalized).

The fix is simple: always request a direct (trustee-to-trustee) rollover, where the money moves directly from one custodian to the other and you never take personal receipt of it. This avoids the withholding issue entirely and removes the 60-day deadline risk.

A note on Roth 401(k) balances

If part of your old plan is a Roth 401(k), it can generally only be rolled into a Roth account (a Roth IRA or a new employer's Roth 401(k)) without creating a taxable event. Mixing this up — rolling Roth dollars into a traditional IRA — can trigger unnecessary taxes, so this is worth confirming with whoever executes the rollover.

Where this fits into a bigger plan

A rollover decision rarely exists on its own. It usually intersects with your asset allocation across every other account you hold, your timeline to retirement, and whether consolidating makes it easier — or harder — to execute a coordinated withdrawal strategy later. That's the piece a single online calculator can't tell you.

This article is general education, not a recommendation for your specific accounts. If you're sitting on an old 401(k) and aren't sure which of these four paths fits your broader plan, that's exactly the kind of question worth a real conversation before you act.