Last checked . Picks are based on the prices, rates, fees and terms each provider publishes, checked at the source. We never rank products by commission. See how we’re funded.
A 401k rollover when leaving a job is the cleanest way to keep a small balance from being cashed out, taxed and penalized. If your old plan holds less than $1,000, the plan can mail you a check, and the IRS says it generally takes 20% off the top. Between $1,000 and the plan’s cutoff, which can be as high as $7,000, the money can be moved into an IRA in your name if you do nothing. Either way you can steer it yourself, and the deadline that matters most is 60 days.
This guide covers what happens at each balance, what cashing out really costs in a worked example, how to complete a 401k rollover three ways, and the snag for Roth money. It draws on IRS pages, an IRS notice on plan cutoffs, a Vanguard analysis published Oct. 7, 2026, and InvestmentNews reporting. It is general information, not tax advice, so check the details of your own plan before you move money.
What happens to a small 401(k) when you leave
Your employer’s plan decides what it does with a former employee’s money, within limits the IRS sets. According to the IRS 401(k) distribution guide, if a distribution is over $1,000 and you do not choose to take it or roll it over, the plan must transfer it to an IRA in your name and notify you in writing. The IRS’s rollover page adds that a balance of $1,000 or less can be paid to you without your consent, generally less 20% withholding.
| Balance when you leave | What the plan may do if you do nothing | What you can do instead |
|---|---|---|
| $1,000 or less | Mail you a check, generally less 20% withholding | Ask for a direct rollover, or deposit the full amount in an IRA or plan within 60 days |
| Over $1,000 up to the plan’s cutoff | Move it to an IRA in your name | Tell the plan where to send it, such as your new employer’s plan or an IRA you choose |
| Above the plan’s cutoff | Generally needs your consent to pay you out; many plans let the money stay | Leave it, or do a direct rollover |
The cutoff for a 401k rollover is not the same everywhere. IRS Notice 2026-34 says section 304 of the SECURE 2.0 Act “permits a plan to increase its involuntary cashout limit from $5,000 to $7,000.” The word is permits. Some plans still use $5,000, so ask the plan administrator which number applies to you before you assume.
What cashing out costs compared with a 401k rollover
Taking the check costs more than a 401k rollover. The IRS describes a 10% additional tax on the taxable part of an early distribution, generally one taken before age 59½, on top of ordinary income tax. The 20% withheld at payout may not cover both. One exception applies to people who leave their employer during or after the year they turn 55, who owe no 10% tax on that plan’s payouts, but ordinary income tax still applies.
Here is what that looks like for a $5,000 traditional balance, using our own calculation. It assumes federal tax only, no exception to the 10% tax and a pretax balance. State tax would take more.
| Tax bracket | Check you receive (20% withheld) | Federal tax plus 10% penalty | What you keep after tax |
|---|---|---|---|
| 12% | $4,000 | $1,100 | $3,900 |
| 22% | $4,000 | $1,600 | $3,400 |
At the 22% bracket you would also owe about $600 more at filing time, because $1,000 was already withheld. A smaller balance follows the same pattern. An $800 balance pays out a $640 check and leaves about $544 after tax at 22%. The check is the visible cost. The hidden cost is growth. As a hypothetical, $5,000 left invested at an assumed 7% a year grows to about $38,000 over 30 years. That is an illustration, not a forecast, but it shows what a $3,400 net payout gives up.
How to complete a 401k rollover in three steps
First, ask the old plan for three things before a 401k rollover: your balance, whether it is pretax or Roth, and its cutoff for automatic moves. Then request a direct rollover. The IRS says in a direct rollover the plan administrator pays the money straight to another plan or IRA, and no tax is withheld.
Second, pick the destination. A new employer’s plan is an option only if it accepts rollovers, and the IRS says it is not required to. An IRA is the other route. Vanguard lists the factors to weigh before you choose: investment options, fees, services, withdrawal penalties, creditor protection, required minimum distributions and taxes on rolled-over employer stock.
Third, if the plan sends the check to you anyway, the 401k rollover clock starts. You have 60 days from receipt to deposit it. The IRS example uses a $10,000 distribution with $2,000 withheld. Roll over only $8,000 and the $2,000 is taxable and may face the 10% tax. Add $2,000 from other money and the full $10,000 rolls over tax free. The IRS also says plan-to-IRA rollovers are not subject to the one-rollover-per-year rule for IRA-to-IRA moves.
Why doing nothing can leave a 401k rollover stuck
Auto-portability systems try to follow workers from job to job, and Vanguard’s analysis shows both the gain and the limit. For balances under $1,000, about 50% were cashed out before employers adopted the Portability Services Network, and fewer than 10% afterward. For balances from $1,000 to $7,000, cash-outs stayed around 30% to 40% both before and after. Only about 3% of U.S. 401(k) plans take part.
The bigger catch is where the money waits. As of early 2026, about 6% of terminated Vanguard participants with a rollover through the network had been matched into a new employer’s plan. The other 94% were in interim IRAs, which Vanguard says can carry recurring account-level fees and conservative default investments. Automatic means parked, not necessarily growing. Anyone who changes jobs can skip the wait by naming a destination.
The Roth snag in a 401k rollover
Roth money does not follow the same path. InvestmentNews reports that federal law allows only traditional IRA assets to roll into a new employer’s 401(k), and Kelsey Mayo of the American Retirement Association told the outlet, “It can’t legally work for Roth money.” A Roth 401(k) balance between $1,000 and $7,000 goes to a Roth IRA if you give no instructions, and that IRA cannot be moved into a new 401(k). If you hold Roth money, plan a direct rollover to a Roth IRA you open yourself, and keep any pretax balance in a separate account so the two do not get confused.
Retirement paperwork piles up around year end, so see our year-end tax moves for 2026 and our look at the 2027 401(k) limit for the deadlines and limits that apply to the money you keep. More money guides sit in the Finance section.
Editor’s Take
The easiest mistake in a 401k rollover is treating a small balance as too small to bother with. A few thousand dollars looks minor next to a new paycheck, which is why so much of it is cashed out. The check you would receive is only part of the cost. The rest is decades of growth that never happens.
The fix for a stalled 401k rollover takes one phone call before your last day. Ask the plan for the balance and the cutoff, request a direct rollover, and name the destination in writing. If the plan moves the money without you, check where it landed within a few weeks and look at the fees. An account you chose is better than one that was picked for you.
