401(k) Rollover

A 401(k) rollover is the transfer of retirement savings out of a 401(k) plan into another tax-advantaged account, most commonly triggered by leaving the employer that sponsors the plan. Done correctly, a rollover preserves the account's tax-deferred (or, for Roth 401(k) money, tax-free) status and doesn't create a taxable event, regardless of which of the several available destinations you choose.

When you leave a job, a 401(k) balance generally has four paths: leave it where it is (many plans allow this above a minimum balance, though you lose the ability to contribute further or take a plan loan), roll it into a new employer's 401(k) if that plan accepts incoming rollovers, roll it into a Traditional or Rollover IRA, or cash it out. The first three are all "rollovers" in the tax sense: money moves between tax-advantaged accounts without becoming taxable income. Cashing out is not a rollover; it's a distribution, taxed as ordinary income in full, plus a 10% early withdrawal penalty if you're under 59½, unless an exception applies.

A detail that surprises people: the once-per-year rollover limit that applies to IRA-to-IRA transfers does not apply to rollovers out of an employer plan like a 401(k). You can roll a 401(k) into an IRA (or a new employer's plan) as often as you change jobs without running into that limit, it's strictly an IRA-to-IRA rule. Pre-tax (Traditional) 401(k) money can also be converted to a Roth IRA during a rollover, but doing so makes the converted amount taxable in the year of the conversion, since Roth accounts hold after-tax money.

Whichever destination you choose, how the money is moved is a separate decision — a direct rollover between institutions, or an indirect rollover routed through a check to you, which changes the withholding and deadline rules; those two pages cover the mechanics. One consequence of the destination is easy to overlook: pre-tax money that lands in an IRA is counted by the pro-rata rule, while money left in or rolled into an employer plan is not, which matters to anyone who uses (or expects to use) a backdoor Roth IRA.

A hypothetical example: Marcus, 34, leaves a job with $60,000 in his old 401(k). He compares two paths: rolling it into his new employer's 401(k), which has similar investment options and low fees, versus rolling it into a Rollover IRA, which would give him access to nearly any investment he wants. He weighs that flexibility against what he'd give up — the plan's loan feature, its institutional fund pricing, and the fact that pre-tax money sitting in an IRA would complicate a backdoor Roth later. Flexibility wins for him, so he requests a direct rollover from his old plan's administrator to his new IRA custodian and the full $60,000 moves institution to institution rather than through his hands.

Pros

• Keeps decades of retirement savings growing tax-deferred (or tax-free, for Roth money) instead of triggering a tax bill.
• Consolidating old 401(k)s into fewer accounts makes it easier to manage an overall investment strategy and track fees.
• A rollover into an IRA typically opens up a far wider set of investment choices than a single employer's plan menu.

Cons

• Rolling out of a 401(k) can mean losing access to that plan's specific creditor protections or loan feature.
• Doing the rollover incorrectly, as a mishandled indirect rollover, can create an unintended and avoidable tax bill.
• Consolidating too aggressively can mean giving up a genuinely good, low-cost fund lineup in an old plan for a worse one elsewhere.