A 401(k) rollover moves your retirement savings from an old employer's plan into a new employer's plan or an IRA. Do it as a direct rollover, where the money moves institution to institution and you never touch it, and there's no tax withheld and no clock running. Do it as an indirect rollover instead, where the old plan cuts you a check, and federal law forces the plan to withhold 20% for taxes before you ever see it, leaving you 60 days to deposit the full original balance, withheld portion included, into a new retirement account using money from your own pocket, or that withheld 20% becomes a taxable distribution, plus a 10% early withdrawal penalty if you're under 59½.
What's the Actual Difference Between a Direct and Indirect Rollover?
A direct rollover, also called a trustee-to-trustee transfer, sends your money straight from your old plan administrator to your new 401(k) or IRA custodian, either electronically or by a check made out to the new custodian, never to you personally. No taxes are withheld and no deadline applies, because the IRS never considers the money "distributed" to you at all. An indirect rollover works differently: the plan distributes the money to you directly, which legally triggers mandatory 20% federal tax withholding on the spot, and starts a strict 60-day countdown to get the money into a new qualified account before it counts as a real withdrawal.
How Does the 20% Withholding Trap Actually Work?
Say you leave a job with $50,000 in your 401(k) and request an indirect rollover. The plan is required to withhold 20%, or $10,000, and sends you a check for the remaining $40,000. To roll over the full $50,000 tax-free, you have to deposit the entire $50,000, not just the $40,000 you actually received, into a new IRA or 401(k) within 60 days. That means coming up with the missing $10,000 from your own savings or checking account in the meantime. If you only redeposit the $40,000 check, the IRS treats the missing $10,000 as an early withdrawal: taxable as ordinary income, plus a 10% penalty if you're under 59½, which at a 22% marginal tax bracket adds up to roughly $3,200 in tax and penalties on top of $10,000 permanently leaving your retirement savings. You do eventually get credit for the $10,000 withheld when you file that year's tax return, so it isn't gone forever, but you're floating it to the IRS for months and you need real cash on hand right now to complete the rollover in full.
Does a Rollover Count Against Your Annual Contribution Limit?
No. Rollover money isn't a new contribution, it's your own existing retirement savings moving between accounts, so it never counts against the $24,500 employee 401(k) contribution limit or the $7,500 IRA contribution limit for 2026. You can roll over $50,000, $200,000, or more in a single year and still contribute the full annual limit on top of it. This trips people up because the number moving looks like a contribution on paper, but the IRS treats a rollover as a transfer of ownership, not new money going in.
What's the One-Rollover-Per-Year Rule, and Does It Apply Here?
The IRS limits indirect IRA-to-IRA rollovers to one every 12 months, across all the IRAs you own combined, not one per account. Try a second indirect IRA-to-IRA rollover within that window and the entire second distribution becomes taxable, with no way to undo it. This rule does not apply to direct rollovers, and it does not apply to rolling a 401(k) into an IRA, only to moving money between IRAs indirectly. It's one more reason a direct rollover is the safer default: it sidesteps this limit entirely along with the withholding trap.
What Happens to a Small 401(k) Balance If You Do Nothing?
If your vested balance is $7,000 or less, your old employer is legally allowed to force it out of the plan without asking you first. Under $1,000, the plan can simply cut you a check, which triggers the same withholding and 60-day exposure described above, just automatically instead of by choice. Between $1,000 and $7,000, the plan instead has to roll it into a safe harbor IRA opened in your name, typically parked in a low-yield or zero-yield cash holding, where it can sit earning next to nothing for years if you never track it down and actively invest it. Neither outcome is good, and both are entirely avoidable by handling the rollover yourself the moment you leave a job instead of leaving a small balance behind.
What Should You Actually Do When You Change Jobs?
- Pick the destination first. Decide whether the money is going into your new employer's 401(k) or an IRA before you contact your old plan, since the paperwork asks where to send it.
- Open the receiving account before requesting anything. If you're rolling into an IRA, get that account open and ready so you can give your old plan real account and routing details right away.
- Explicitly request a direct rollover. Say the words "direct rollover" or "trustee-to-trustee transfer" when you call your old plan's administrator. Some plans default to indirect unless you specify otherwise.
- Confirm the money actually lands. Direct rollover checks are sometimes still mailed to you, made out to the new custodian "for the benefit of" your name. That's still a direct rollover as long as it's never made payable to you personally, but you're responsible for forwarding it, so don't let it sit in a drawer.
- Don't leave a small balance behind out of inertia. Track down and roll over any old 401(k) under $7,000 yourself before your former employer does it for you into a low-yield account you might not notice for years.
If your old balance includes any employer match that hadn't fully vested when you left, only the vested portion is actually yours to roll over. Our breakdown of what happens to your 401(k) match if you leave before you're vested covers how that split gets calculated. And if you're deciding where the rolled-over money should actually land, our comparison of Roth IRA vs. traditional IRA walks through how to choose between them.
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