Rolling over a 401k to a Roth IRA while still employed is allowed under federal law, but only if your specific plan permits an in-service distribution, and only certain buckets of money inside your account are usually eligible. Any pre-tax amount you convert becomes taxable income in the year of the transfer, so the decision is really two questions stacked together: does your plan allow it, and can you afford the tax bill.
Does Your Plan Actually Allow It
Federal law gives employers the option to permit in-service rollovers. It does not require them to. Many plans restrict or prohibit these distributions to keep assets in the plan, so the first step is to read your plan’s own rules.
Request the Summary Plan Description (SPD) from human resources or the plan administrator’s website. Every participant has a legal right to receive one. Look for sections titled “Distributions” or “Withdrawals While Employed.” If the SPD does not clearly address in-service rollovers, ask for the full Plan Document, which contains the precise provisions the administrator must follow. Some plans charge a processing fee for in-service distributions, deducted from your balance.
Which Money in Your 401k Is Eligible
Even when a plan allows in-service distributions, the rules differ depending on which bucket the money came from.
Your Own Paycheck Contributions
Elective deferrals, meaning the pre-tax or Roth 401k contributions taken from your paycheck, generally cannot be distributed while you are still employed until you reach age 59½.1Office of the Law Revision Counsel. 26 USC 401 – Qualified Pension, Profit-Sharing, and Stock Bonus Plans Other qualifying events that unlock these funds are leaving the job, becoming disabled, or the plan terminating.2Internal Revenue Service. 401k Resource Guide – Plan Participants – General Distribution Rules Under 59½ and still working? Your deferrals are typically locked.
Employer Match and Profit-Sharing
Federal law does not restrict vested employer contributions as tightly. Whether you can pull matching or profit-sharing dollars out while still employed depends largely on your plan’s terms.3Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts Some plans allow distribution at any time, others impose age or service requirements, and some prohibit it entirely.
After-Tax Contributions
If your plan offers a separate after-tax contribution bucket (distinct from both traditional and Roth 401k deferrals), that money is usually the most flexible for in-service rollovers because it is not subject to the age restrictions that apply to elective deferrals. This is the piece that powers the mega backdoor Roth strategy described below.
Spousal Consent
If your 401k is subject to the qualified joint and survivor annuity rules, and many are, federal law requires your spouse’s written, notarized consent before the plan can distribute your funds.4Office of the Law Revision Counsel. 26 USC 417 – Definitions and Special Rules for Purposes of Minimum Survivor Annuity Requirements That requirement applies even when you are rolling the money into your own Roth IRA. Without the consent, the administrator will deny the request. Ask whether it applies to your plan before you start the paperwork.
The Tax Bill on a Conversion
Unlike direct Roth IRA contributions, Roth conversions have no income limit and no dollar cap. High earners can convert. You can convert any amount in a single year. But when you roll pre-tax 401k money into a Roth IRA, the entire converted amount is added to your ordinary income for that tax year.5Office of the Law Revision Counsel. 26 USC 408A – Roth IRAs
A $50,000 conversion increases your taxable income by $50,000. Because federal tax runs in brackets, only the portion of the conversion that lands in a higher bracket is taxed at that higher rate, not the whole amount.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Still, a large conversion can push part of your income into a bracket you would not normally hit, which is why many people spread conversions over several years.
Pay the tax from savings outside the 401k, not from the rollover itself. If part of the distribution is withheld for taxes rather than rolled over, that withheld portion counts as a distribution you took, which can trigger the 10% early withdrawal penalty if you are under 59½.7Office of the Law Revision Counsel. 26 USC 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts Paying from outside funds also puts every dollar of the conversion to work inside the Roth IRA.
Medicare IRMAA
If you are enrolled in Medicare or nearing enrollment, a large conversion can raise your Part B and Part D premiums. Medicare calculates an Income-Related Monthly Adjustment Amount using your modified adjusted gross income from two years earlier. For 2026, the first surcharge bracket triggers at $109,000 for individual filers and $218,000 for joint filers, and the standard monthly Part B premium of $202.90 can climb as high as $689.90 for the highest earners.8Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles Splitting a conversion across tax years can keep you under the thresholds.
Employer Stock: Stop Before You Roll
If your 401k holds shares of your employer’s stock, moving those shares into any IRA (Roth or traditional) permanently forfeits a tax break called net unrealized appreciation. Under NUA, when company stock is distributed directly to a taxable brokerage account as part of a qualifying lump-sum distribution, you pay ordinary income tax only on the stock’s original cost basis. The gain above that basis is taxed at long-term capital gains rates when you sell, which are typically lower than ordinary income rates. Once the stock goes into an IRA, that option is gone and every future dollar out is taxed as ordinary income. If you hold significant employer stock, work through the NUA math with a tax professional before you initiate any rollover.
How to Move the Money
Direct Rollover
In a direct rollover, the plan administrator sends funds straight to your Roth IRA custodian, either by wire or by a check made payable to the receiving institution for your benefit. The money never touches your bank account, so nothing is withheld from the transfer.9Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions You will still owe income tax on the pre-tax amount converted, but the 10% early withdrawal penalty does not apply because the money stays inside a qualified retirement account the entire time.
Request the in-service distribution form from your plan administrator or the plan’s online portal. You will need the receiving Roth IRA’s account and routing information. Processing typically takes five to ten business days. If the plan mails you a check made out to the receiving institution, forward it promptly.
Indirect (60-Day) Rollover
An indirect rollover sends the funds to you first. The plan is required to withhold 20% of the taxable portion for federal taxes.9Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions You then have 60 days to deposit the full original distribution amount, including the 20% withheld, into a Roth IRA. Making up the withheld portion has to come from outside cash. Miss the deadline or deposit less than the full amount and the shortfall becomes a taxable distribution, plus the 10% penalty if you are under 59½. The direct rollover avoids all of this.
The Five-Year Rule After You Convert
Once the money is in the Roth IRA, a separate five-year clock starts for each conversion. Withdraw the taxable portion of a conversion within five tax years of making it, while under age 59½, and you owe the 10% early distribution penalty on the withdrawn amount, even though you paid income tax on it at the time of the conversion.5Office of the Law Revision Counsel. 26 USC 408A – Roth IRAs Each conversion has its own five-year window, counted from January 1 of the tax year of the conversion.
Earnings follow a different five-year clock. Earnings come out tax-free only after the Roth IRA has been open for five tax years and the withdrawal meets a qualifying event such as reaching 59½, disability, or a first-time home purchase up to $10,000 lifetime. The IRS treats withdrawals in this order: regular contributions first, then conversions (oldest first), then earnings.10Internal Revenue Service. Publication 590-B (2025), Distributions From Individual Retirement Arrangements (IRAs) That ordering protects most withdrawals from penalty as long as you are pulling from contributions or seasoned conversions.
Mega Backdoor Roth
If your plan allows after-tax contributions above the standard elective deferral limit and permits in-service rollovers of those amounts, you can contribute after-tax dollars to the 401k and roll them into a Roth IRA. Because you already paid income tax on the contributions, only the earnings portion is taxable at conversion. IRS Notice 2014-54 lets you split a distribution so the pre-tax portion goes to a traditional IRA while the after-tax portion goes to the Roth, keeping the tax-free money cleanly separated.11Internal Revenue Service. Notice 2014-54 – Guidance on Allocation of After-Tax Amounts to Rollovers Not every plan offers this, so confirm before counting on it.
Reporting the Rollover
Your plan administrator will issue Form 1099-R by January 31 of the year after the distribution, reporting the amount and classifying the transaction with a code in Box 7.12Internal Revenue Service. General Instructions for Certain Information Returns (2025) The IRS gets a copy, so reporting the transaction accurately on your return is what tells the agency the money was rolled over rather than cashed out.
File Form 8606 with your federal tax return for the year of the conversion.13Internal Revenue Service. Instructions for Form 8606 (2024) Part II tracks the taxable amount. Skipping this form can create confusion about your Roth IRA’s tax basis in later years, particularly once you start taking distributions.