Most 401(k) rollovers are not taxed. Whether 401(k) rollovers are taxed depends almost entirely on how the money moves: a direct transfer from your old plan to a new retirement account carries no tax and no penalty, while taking the check yourself, missing the 60-day deadline, or moving pre-tax dollars into a Roth account will trigger a tax bill.
Direct Rollovers Carry No Tax
A direct rollover sends your balance straight from the old 401(k) plan administrator to the new financial institution. You never receive a check or gain access to the cash. Because the money passes between qualified retirement accounts without stopping in your hands, the IRS does not treat it as a distribution, no taxes are withheld, and no early withdrawal penalty applies regardless of your age.1Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
There is no cap on how many direct rollovers you can do in a year. The method works for moving a balance into a traditional IRA, into a new employer’s 401(k), or into another eligible retirement plan. When your plan administrator asks how to handle the distribution, choosing a direct rollover (sometimes called a trustee-to-trustee transfer) avoids every problem described below.
Indirect Rollovers and the 20% Withholding
An indirect rollover happens when the plan administrator sends the distribution check to you rather than to the new account. Federal law requires the administrator to withhold 20% of the taxable amount for federal income taxes before writing your check.2Office of the Law Revision Counsel. 26 USC 3405 – Special Rules for Pensions, Annuities, and Certain Other Deferred Income On a $100,000 balance, you receive $80,000 and $20,000 goes to the IRS.
That 20% is a prepayment, not a final tax bill. You can recover it when you file your tax return, but only if you complete the rollover on time. And to make the rollover whole, you have to deposit the full $100,000 into the new account, which means finding the missing $20,000 out of pocket. If you deposit only the $80,000 you received, the IRS treats the $20,000 shortfall as a taxable distribution for that year, and if you are under 59½ it may also owe a 10% early withdrawal penalty.1Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
Some states also withhold their own income tax from retirement plan distributions. The federal 20% is mandatory and cannot be waived; state rules vary. Where state withholding applies, the gap you need to cover out of pocket grows accordingly.
The 60-Day Deadline
Once you receive a distribution check, you have exactly 60 days from the date of receipt to deposit the full original amount into an eligible retirement account. Miss that deadline and the entire unreplaced amount becomes taxable income for the calendar year, plus the 10% early withdrawal penalty on anything not rolled over if you are under 59½.1Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions There is no extension for forgetting or running short of cash.
Self-Certification When You Miss It
If you miss the 60-day window for a reason beyond your control, IRS Revenue Procedure 2020-46 lets you self-certify a waiver by giving a written statement to the receiving financial institution. The IRS accepts a limited list of qualifying reasons:3Internal Revenue Service. Revenue Procedure 2020-46
- The receiving or distributing financial institution made an error that caused the delay.
- The distribution check was misplaced and never cashed.
- You deposited the funds into an account you mistakenly believed was an eligible retirement plan.
- Your principal residence was severely damaged.
- You or a family member died or was seriously ill.
- You were incarcerated.
- A postal error delayed delivery of the check or paperwork.
- A foreign country imposed restrictions that prevented the transfer.
- The distribution was sent to a state unclaimed property fund.
Self-certification is not a guarantee. The IRS can still audit and deny the waiver. If your reason fits the list, the receiving plan or IRA is allowed to accept the late rollover. For reasons not on the list, you would need to request a private letter ruling from the IRS, which involves a filing fee and a longer wait.4Internal Revenue Service. Retirement Plans FAQs Relating to Waivers of the 60-Day Rollover Requirement
The One-Per-Year Limit on Indirect IRA Rollovers
Even when you complete an indirect rollover within 60 days, you are limited to one indirect IRA-to-IRA rollover in any 12-month period. If you receive a distribution from any IRA and roll it into another IRA, you cannot do the same with any other IRA distribution for the next 12 months. A second indirect rollover during that window is treated as a taxable distribution.5Internal Revenue Service. Application of One-Per-Year Limit on IRA Rollovers
The limit does not apply to direct trustee-to-trustee transfers, rollovers to or from a 401(k) or other qualified employer plan, or Roth conversions. Those transactions fall outside the rule and do not count against your 12-month window.
Roth Conversions Are Always Taxable
Rolling pre-tax 401(k) money into a Roth IRA or Roth 401(k) is intentionally taxable. Traditional 401(k) contributions were never taxed going in, so moving them into a Roth account, where future withdrawals will be tax-free, triggers income tax on the full converted amount in the year of the conversion.6Internal Revenue Service. Instructions for Form 8606 For 2026, federal income tax rates range from 10% to 37% depending on your total taxable income and filing status.7Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
A conversion does not trigger the 10% early withdrawal penalty, even if you are under 59½, as long as the money moves into the Roth account rather than into your pocket. People often choose this strategy when they expect to be in a higher tax bracket during retirement or when they want to eliminate future required minimum distributions on those funds. The bill can be substantial. Converting $150,000 in a year when you already have significant income could push a large slice of the conversion into a higher bracket, and the tax is due for the year the conversion occurs regardless of when or whether you touch the money later.
The Five-Year Clock on Converted Funds
Converted amounts carry a separate five-year holding requirement. If you withdraw converted funds from your Roth IRA within five years of the conversion and you are under 59½, you may owe the 10% early withdrawal penalty on the portion that was included in income at the time of conversion.8Internal Revenue Service. Publication 590-B – Distributions From Individual Retirement Arrangements (IRAs) Each conversion starts its own five-year clock. A conversion made in 2026 must remain in the Roth account until at least January 1, 2031, to avoid the penalty if you have not yet reached 59½.
A separate five-year rule governs whether Roth IRA earnings come out completely tax-free. For that to happen, the Roth IRA must have been open for at least five tax years (starting from the first year you made any Roth IRA contribution or conversion), and you must be at least 59½, disabled, or using up to $10,000 for a first-time home purchase.8Internal Revenue Service. Publication 590-B – Distributions From Individual Retirement Arrangements (IRAs)
Required Minimum Distributions Cannot Be Rolled Over
If you have reached the age when required minimum distributions (RMDs) begin, the RMD amount for that year is not eligible for rollover into another retirement account.9Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs You have to take the distribution and pay income tax on it. Only amounts above the year’s required minimum can be rolled over. If you accidentally roll over an RMD, you will need to withdraw the excess from the receiving account and correct the error, which can trigger further tax complications.
Company Stock and Net Unrealized Appreciation
If your 401(k) holds stock in your employer’s company, rolling everything into an IRA may cost you a valuable tax break. A provision called net unrealized appreciation (NUA) lets you pay ordinary income tax only on the original cost basis of the stock, then pay the lower long-term capital gains rate on all the growth when you eventually sell.10Office of the Law Revision Counsel. 26 USC 402 – Taxability of Beneficiary of Employees Trust
To qualify, you must take a lump-sum distribution of your entire plan balance in a single tax year, triggered by separation from service, reaching age 59½, disability, or death. The employer stock is distributed in kind (as actual shares) into a regular taxable brokerage account rather than an IRA. You can then roll the remaining non-stock assets in the plan into an IRA to keep those tax-deferred.
Once employer stock enters an IRA, the NUA advantage disappears permanently. Inside an IRA, all future withdrawals of that stock are taxed as ordinary income. For someone holding company stock that has appreciated significantly, the gap between long-term capital gains rates and ordinary income rates on the growth can add up to tens of thousands of dollars. If your 401(k) holds a meaningful amount of employer stock, consider talking to a tax professional before initiating any rollover.
Reporting the Rollover So It Stays Tax-Free
Every rollover must appear on your federal tax return, even when no taxes are owed. Your old plan’s financial institution issues a Form 1099-R showing the gross distribution amount in Box 1. For a successful direct rollover, Box 2a (taxable amount) will show zero.11Internal Revenue Service. 2025 Instructions for Forms 1099-R and 5498
On your Form 1040, report the total distribution from Box 1 on line 5a. The taxable portion goes on line 5b, which should be zero for a fully completed direct rollover. Check box 1 on line 5c to indicate the distribution was a rollover.12Internal Revenue Service. Instructions for Form 1040 For a Roth conversion, also file Form 8606, Part II, to report the converted amount.6Internal Revenue Service. Instructions for Form 8606
Filing these forms correctly matters. If the IRS sees a distribution on a 1099-R but no matching rollover entry on your 1040, it may treat the whole amount as taxable income and send you a bill. Reporting the rollover properly is what proves the money went back into a qualified account and no tax is owed.