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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Short answer: Moving untaxed retirement money into a Roth account generally creates ordinary income in the year of the conversion or rollover, but the transaction itself generally is not subject to the 10% early-distribution tax. The later withdrawal rules depend on whether the money is in a Roth IRA or an employer plan’s designated Roth account. A traditional IRA conversion, a pre-tax 401(k)-to-Roth IRA rollover, an in-plan Roth 401(k) rollover, and a rollover of an existing Roth 401(k) balance are different transactions with different five-year rules.
Roth conversion vs. Roth 401(k) rollover: what’s the difference?
The phrase “Roth conversion” usually describes moving money from a traditional IRA into a Roth IRA. “Roth 401(k) rollover” can describe several different moves: sending pre-tax 401(k) money to a Roth IRA, transferring pre-tax money into the same employer plan’s designated Roth account through an in-plan Roth rollover, or moving an already-Roth 401(k) balance to a Roth IRA or another designated Roth plan. The source account, destination account, tax basis, and distribution timing determine the result.
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| Transaction | Federal income tax in the transaction year | Early-distribution issue | Key five-year or handling rule |
|---|---|---|---|
| Traditional IRA to Roth IRA | The taxable portion is generally included in gross income for the conversion year. After-tax basis is not taxed again. | The conversion itself generally avoids the 10% additional tax. A later withdrawal of taxable converted money during its own five-year period may trigger the tax if no exception applies. | Each conversion has a separate five-year penalty period. That period is different from the Roth IRA qualified-distribution test. |
| Pre-tax 401(k) distribution directly rolled to a Roth IRA | The amount that would have been taxable without the rollover is generally included in income for the rollover year; after-tax contributions are not taxed again. | The rollover itself generally is not subject to the 10% additional tax. Later Roth IRA ordering and five-year rules apply. | A direct rollover generally avoids mandatory withholding. A payment to you normally invokes 20% withholding and a 60-day rollover deadline. |
| Pre-tax 401(k) money moved into the same plan’s designated Roth account | Untaxed amounts are generally included in income in the year of the in-plan Roth rollover. | The transfer is not itself subject to the 10% additional tax, but a special recapture rule may apply if taxable rollover amounts are distributed from the plan within five taxable years. | The plan must offer and permit the feature. The period starts January 1 of the rollover year and ends December 31 of the fifth year. |
| Existing Roth 401(k) balance rolled to a Roth IRA or another designated Roth plan | A qualified distribution is generally tax-free. A nonqualified distribution follows rules for basis and earnings. | The account’s participation test and any applicable early-distribution rules govern a later payment; this is not a pre-tax conversion. | The eligible destinations are another designated Roth account or a Roth IRA. Time in the 401(k) does not transfer to the Roth IRA’s own five-year period. |
These are federal rules summarized by the Internal Revenue Service in Publications 17 and 575, Topic No. 413, and its designated Roth account FAQs. Your taxable amount can change with your basis, plan document, distribution eligibility, age, and an applicable exception.
When does a Roth conversion or rollover create taxable income?
Traditional IRA to Roth IRA
A traditional IRA conversion is taxable to the extent the converted amount has not already been taxed. The taxable amount is reported as ordinary income for the calendar year in which the conversion occurs. A return of after-tax basis is not included in income a second time. The conversion is therefore not tax-free simply because the money remains inside a retirement account.
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The amount added to income can affect your marginal federal tax bracket and other income-based calculations for that year. The IRS rules do not provide a universal tax bill: the result depends on the amount converted, the account’s taxable and after-tax components, and your other income. State taxation is not established by the federal guidance summarized here, so check the rules where you file.
Pre-tax 401(k) to a Roth IRA
If you take eligible pre-tax employer-plan money and roll it to a Roth IRA, the taxable portion is generally included in income as though it had not been rolled over. The rollover changes the destination but does not erase the tax on untaxed money. After-tax contributions that are already part of the plan basis are not taxed again.
This transaction is different from rolling a 401(k) to a traditional IRA or another non-Roth eligible plan. A properly completed non-Roth rollover is generally not currently taxable, while a rollover to a Roth IRA is taxable for the untaxed portion.
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An in-plan Roth rollover moves eligible vested non-Roth plan assets into the same employer plan’s designated Roth account. The plan may limit which balances qualify and may not offer the feature at all. Untaxed amounts are generally included in your income for the year of the in-plan rollover. The account remains in the employer plan rather than becoming a Roth IRA.
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Already-Roth 401(k) money
Money already held in a designated Roth 401(k) account is after-tax money; moving it is not the same as converting pre-tax savings. Eligible rollover destinations are another designated Roth account or a Roth IRA. A qualified distribution from the plan is generally not included in income. If the distribution is nonqualified, the treatment of contributions and earnings differs, so the plan’s tax reporting and distribution records matter.
Is there a 10% penalty for converting a 401(k) to a Roth account?
The conversion or rollover transaction itself generally is not subject to the 10% early-distribution tax. The potential penalty concerns a later distribution, and the rule changes with the destination.
Roth IRA conversion five-year period
For a Roth IRA, each traditional IRA conversion or qualifying employer-plan rollover has its own five-year period for the 10% additional-tax analysis. The period begins on the first day of the tax year in which that conversion or rollover occurs. If you withdraw the taxable converted amount during its applicable period, the 10% additional tax may apply when you are under age 59½ and no statutory exception covers the payment.
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This conversion-period rule is separate from the Roth IRA’s qualified-distribution test. The qualified-distribution test uses the first tax year for which you made a Roth IRA contribution for your benefit and also requires a qualifying event, usually reaching age 59½, but also including death, disability, and certain first-home distributions identified by IRS guidance. Passing one five-year test does not automatically satisfy the other.
In-plan Roth rollover recapture
IRS guidance states that “In-plan Roth rollovers are not subject to the 10% additional tax on early distributions.” A special recapture rule can nevertheless impose that tax if taxable in-plan rollover amounts are distributed from the plan during the five-taxable-year period that begins January 1 of the rollover year and ends December 31 of the fifth year. Statutory exceptions and nontaxable amounts can change the result.
For example, an in-plan rollover completed in 2026 starts its recapture period on January 1, 2026, and the specified period runs through December 31, 2030. A distribution during that window requires tracing the taxable rollover amount and checking whether an exception applies; it is not enough to label the payment “Roth” and assume no penalty can apply.
Actual plan distributions before age 59½
A separate cash distribution from an employer plan can be subject to the 10% additional tax on the amount includible in income when paid before age 59½. IRS participant guidance lists exceptions, including certain separations from service at age 55 or older, disability, death, and other specified circumstances. The age rule therefore cannot be applied without checking the payment type and exception facts.
Does a Roth 401(k) rollover restart the five-year rule?
Moving pre-tax money into a Roth IRA
For a Roth IRA, the taxable amount from each conversion or qualifying plan rollover receives its own five-year period for early-distribution purposes. That period does not merge into one universal clock. Separately, the Roth IRA qualified-distribution clock is based on your first tax year with a Roth IRA contribution for your benefit. An earlier Roth IRA contribution can establish an earlier start for that qualified-distribution test, but it does not eliminate the separate five-year period attached to a later conversion.
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Moving money into a designated Roth 401(k) account
An in-plan Roth rollover uses the plan’s five-taxable-year recapture period, beginning January 1 of the rollover year. It is not the same clock as a Roth IRA conversion period and should be tracked separately for each rollover and plan record.
Rolling an existing Roth 401(k) to a Roth IRA
Time spent in the employer plan’s designated Roth account does not carry over to the Roth IRA’s qualified-distribution five-year period. The Roth IRA looks to its own five-year participation history. If you already had a Roth IRA contribution year that establishes an earlier start, that earlier date can control the Roth IRA test; otherwise, moving the plan assets does not by itself create an earlier Roth IRA start date.
Direct rollover, 20% withholding, and the 60-day deadline
How the money is delivered can change the practical tax result even when the intended destination is the same.
- Use a direct rollover when available. Ask the plan administrator to send an eligible distribution directly to the receiving Roth IRA trustee or, for an in-plan transaction, to process the transfer inside the plan. A direct taxable plan rollover generally avoids the mandatory 20% federal withholding that applies when an eligible distribution is paid to you.
- Understand participant-paid distributions. If the plan pays the distribution to you, the general rule requires 20% federal income-tax withholding on an eligible taxable amount. The withheld money is sent to the IRS, not automatically to the Roth account.
- Replace withheld money if you want to roll over the full gross amount. The ordinary rollover deadline is 60 days after you receive the distribution. To defer tax on the full eligible amount when 20% was withheld, you generally must contribute the withheld amount from another source within the 60-day window. Rolling over only the net check can leave the withheld portion taxable.
- Confirm eligibility and paperwork. Employer plans can restrict which distributions are eligible, and plan administrators issue reporting forms that distinguish a direct rollover, a participant payment, and an in-plan Roth rollover. Keep the distribution statement, rollover confirmation, and basis records.
The 60-day rule and withholding rules have exceptions and transaction-specific limits. If a large distribution has already been paid to you, contact the plan administrator and tax professional promptly rather than assuming a later deposit will cure every issue.
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How to choose the right transaction
| If your starting money is… | And your goal is… | Transaction to investigate | Main issue to resolve first |
|---|---|---|---|
| Traditional IRA money | Future Roth IRA withdrawals | Traditional IRA-to-Roth IRA conversion | Taxable amount, basis, and the year’s income effect |
| Pre-tax 401(k) money | A Roth IRA outside the plan | Direct plan-to-Roth IRA rollover | Distribution eligibility, withholding, and 60-day handling if paid to you |
| Pre-tax 401(k) money | Keep assets in the employer plan’s Roth account | In-plan Roth rollover | Whether the plan offers it and how the five-taxable-year recapture rule applies |
| Roth 401(k) money | Consolidate in a Roth IRA | Roth 401(k)-to-Roth IRA rollover | Roth IRA five-year history and the plan account’s qualified-distribution status |
There is no single “best” route. A Roth IRA may provide a different investment menu and withdrawal framework than an employer plan, while an in-plan rollover keeps the assets subject to the plan document. Compare fees, creditor protections, investment choices, distribution restrictions, and your expected need for the money alongside the tax rules.
Step-by-step checklist before moving the money
- Identify the source balance. Separate traditional IRA funds, pre-tax 401(k) funds, after-tax basis, and existing designated Roth funds. Do not treat a Roth 401(k) balance as pre-tax money.
- Name the destination precisely. Decide whether the receiving account is a Roth IRA or the plan’s designated Roth account. The destination determines which five-year and distribution rules apply.
- Ask the plan administrator about eligibility. Confirm whether the distribution is eligible for rollover, whether an in-plan Roth rollover is offered, which vested amounts qualify, and how the plan will report the transaction.
- Estimate the taxable income for the transaction year. Use the taxable portion, not merely the account’s headline balance. Include the conversion or rollover in the year it occurs and evaluate the effect on your federal return; state treatment requires separate confirmation.
- Request direct handling. Provide the receiving trustee’s instructions for a direct rollover or follow the plan’s in-plan procedure. Avoid a participant-paid check when you do not have a clear plan for withholding and the 60-day deadline.
- Record the dates and amounts. For each Roth IRA conversion, retain the conversion date and taxable amount. For each in-plan Roth rollover, retain the rollover year and the plan’s recapture information.
- Check the later withdrawal conditions. Before taking money out, determine whether the payment is from a Roth IRA conversion layer, an in-plan rollover layer, or an existing Roth balance, and test age, timing, and exceptions.
Worked timing examples
Traditional IRA conversion in 2026
Suppose a taxpayer converts a taxable amount from a traditional IRA to a Roth IRA during 2026. That amount is generally included in 2026 gross income. The conversion’s separate five-year early-distribution period begins January 1, 2026. A later withdrawal of that taxable converted amount before the period ends may face the 10% additional tax if the taxpayer is under 59½ and no exception applies. The Roth IRA’s qualified-distribution test is evaluated separately using the taxpayer’s Roth IRA contribution history and a qualifying event.
In-plan Roth rollover in 2026
Suppose a plan permits a taxable in-plan Roth rollover during 2026. The untaxed amount is generally included in 2026 income, while the rollover itself is not subject to the 10% additional tax. If taxable rollover amounts are distributed from the plan before December 31, 2030, the special recapture rule may apply, subject to exceptions and the amount’s tax character.
Participant-paid 401(k) distribution
Suppose an eligible taxable plan distribution is paid directly to the participant. The plan generally withholds 20% for federal income tax, and the participant generally has 60 days from receipt to complete a rollover. To roll over the full gross distribution, the participant generally must replace the withheld amount from other funds. A direct rollover would generally avoid this replacement problem.
Common mistakes and how to correct them
- Calling every transaction a Roth conversion. Fix: identify the source and destination account before applying a rule.
- Assuming the conversion is tax-free. Fix: calculate the untaxed portion and include it in income for the transaction year.
- Assuming every Roth account has one five-year clock. Fix: track Roth IRA conversion periods, the Roth IRA qualified-distribution test, and the designated-plan participation or recapture rules separately.
- Expecting an in-plan rollover to be automatically penalty-free forever. Fix: test later plan distributions against the five-taxable-year recapture rule and applicable exceptions.
- Depositing only the net check after withholding. Fix: use a direct rollover or replace the 20% withholding when rolling over the full eligible amount within 60 days.
- Assuming Roth 401(k) time transfers to a Roth IRA. Fix: review the Roth IRA’s own contribution history; plan participation time does not carry over.
- Ignoring the plan document. Fix: obtain the administrator’s distribution and rollover rules, because eligibility and available features vary by plan.
What to verify with a professional
Federal IRS guidance supplies the framework, but the final result depends on facts that a general article cannot calculate. Verify the account basis, taxable amount, distribution eligibility, age, separation-from-service status, disability or death exception, conversion dates, and plan reporting. For a substantial conversion, a mixed pre-tax and after-tax account, a recent participant-paid distribution, or multiple Roth accounts with different dates, confirm the mechanics with the plan administrator and a qualified tax professional before acting.
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