Can I Roll a 401k Into a Roth IRA? Taxes, Timing, and the Five-Year Rule

Yes, rolling a 401k into a Roth IRA is allowed, and there is no income limit and no cap on how much you can convert. The catch is tax: the entire pre-tax amount you move becomes ordinary income in the year you convert it. There is no 10% early withdrawal penalty as long as the money lands in the Roth IRA rather than in your pocket.¹ Because the tax bill can be large, many people convert in stages across several years.

Can You Even Take the Money Out Yet

Your 401k plan has to release the funds before you can roll anything anywhere. Most plans distribute when you reach age 59½, leave your job, become disabled, or the plan terminates.² Some plans also allow in-service distributions for active employees, but this varies by employer, so check your plan’s rules.

If you separate from service during or after the year you turn 55, you can take distributions from that employer’s 401k without the 10% early withdrawal penalty even before you reach 59½.³ This “Rule of 55” applies only to the plan at the employer you left, not to older 401k balances sitting at previous jobs.

What the Conversion Costs You in Tax

Pre-tax 401k dollars become taxable income when they hit the Roth IRA. You pay federal income tax at your marginal rate on the whole converted amount, plus any state income tax that applies. There is no additional 10% penalty on the conversion itself, provided the funds go directly into a Roth IRA.¹

Convert Only Part of the Balance

You are not required to move everything at once. A common approach is to convert only enough each year to fill your current tax bracket without pushing into the next one. If you have $40,000 of room before the next bracket, convert $40,000 this year, another slice next year, and so on. Each year’s conversion is taxed on that year’s return.

Cover the Tax Bill Before the IRS Asks

A big conversion can leave you short at tax time. If you expect to owe at least $1,000 after subtracting withholding and refundable credits, and your withholding will cover less than 90% of the current year’s liability (or 100% of last year’s, 110% if your prior-year adjusted gross income exceeded $150,000), you generally need to make estimated tax payments to avoid an underpayment penalty.⁴ Bumping up wage withholding for the rest of the year is often simpler than filing quarterly estimates.

Watch the 2026 Rate Change

The individual income tax rate reductions from the 2017 Tax Cuts and Jobs Act are scheduled to expire after 2025. If Congress does not extend them, the 12% bracket reverts to 15%, the 22% bracket rises to 25%, the 24% bracket becomes 28%, and the top rate climbs from 37% to 39.6%. Whether that happens depends on legislation, but the possibility makes the timing of a conversion worth thinking through. Lower rates now mean less tax on the same dollar amount.

Direct Rollover vs. Indirect Rollover

How the money physically moves changes what you keep. A direct rollover sends the funds from the 401k administrator straight to your Roth IRA custodian. The check is made payable to the receiving institution for your benefit, no federal tax is withheld, and 100% of the balance lands in the Roth IRA.⁵ You still owe income tax on the conversion when you file, but nothing gets held back up front.

An indirect rollover pays the money to you first. The plan administrator is required to withhold 20% for federal income tax, so you receive only 80% of the balance.⁵ To complete the rollover without extra tax consequences, you have to deposit the full original amount, including the withheld 20%, into the Roth IRA within 60 days. That means finding the missing 20% from other savings until you recover it on your tax return.¹

The 60-day window is a statutory limit under 26 U.S.C. § 402(c). Miss it and the IRS treats the whole distribution as taxable income, with the 10% early withdrawal penalty added on if you are under 59½.⁶ Waivers exist for narrow circumstances like disaster or events beyond your control, but they are not guaranteed. Use a direct rollover.

How to Actually Move the Money

The mechanics are straightforward once you know what to ask for:

Open a Roth IRA if you do not have one. You will need the custodian’s legal name, address, and account number for the paperwork.
Contact your 401k plan administrator and request a distribution or rollover form. Your recent statement or HR portal will have the contact information.
Select “direct rollover” and provide the Roth IRA custodian’s payee details. Specify the check is payable to that institution for your benefit.
Choose the amount. Convert the full balance or a specific dollar figure that fits your tax plan for the year.
Submit the form. Some administrators accept online submissions; others require mailed forms, sometimes with a signature guarantee.
Wait two to four weeks for processing and watch for a confirmation from the receiving custodian.
Invest the funds once they arrive. Rollover money typically sits in a cash position until you pick investments.

Your former plan will send a Form 1099-R by the end of January reporting the distribution. The taxable amount appears in Box 2a, and the distribution code in Box 7 identifies the type of transaction.⁷ You report the conversion on the return for the year the distribution occurred.

The Five-Year Rule on Converted Funds

Money in a Roth IRA is not immediately available penalty-free just because you moved it there. Under 26 U.S.C. § 408A(d), a Roth distribution is “qualified” and fully tax-free only after a five-taxable-year period and once you also meet one of these conditions: age 59½, death, disability, or a first-time home purchase up to a $10,000 lifetime cap.⁸

Every conversion starts its own five-year clock. A $50,000 conversion in 2026 clears its clock at the start of 2031; a second $50,000 conversion in 2028 clears at the start of 2033.⁹ Withdrawing the taxable portion of a conversion before its clock ends, if you are under 59½, triggers the 10% early withdrawal penalty on the amount that was originally included in income.

Roth IRA withdrawals follow a fixed order: regular contributions first (always tax- and penalty-free), then conversions on a first-in, first-out basis, then earnings.⁹ Within a single conversion, the taxable portion comes out before any nontaxable portion. The order generally helps you, because older contributions and older conversion principal come out before any dollars that could trigger a penalty.

No Lifetime Required Minimum Distributions

A traditional 401k or traditional IRA forces taxable withdrawals starting at age 73 (or 75, depending on your birth year). A Roth IRA has no required minimum distributions during the owner’s lifetime, so the balance can keep compounding untouched for as long as you live.¹⁰ For people who do not need the money soon or want to leave it to heirs, this is one of the strongest reasons to convert.

When a Straight Conversion Is the Wrong Move

Company Stock With Large Gains

If your 401k holds employer stock that has grown significantly, rolling the shares into a Roth IRA can be expensive. Net unrealized appreciation (NUA) rules let you take a lump-sum distribution of the stock into a taxable brokerage account and pay ordinary income tax only on the original cost basis. When you later sell the shares, the appreciation built up inside the plan is taxed at long-term capital gains rates instead of ordinary income rates.¹¹ Roll that stock into a Roth IRA instead and the full fair market value becomes ordinary income on the conversion. Run the numbers with a tax professional before converting a 401k that holds employer shares.

After-Tax 401k Dollars

Some plans allow after-tax contributions above the standard employee elective deferral limit of $24,500 for 2026.¹² Total contributions from all sources cannot exceed $72,000 in 2026, or $80,000 at age 50 and up, or $83,250 between ages 60 and 63.¹³ Under IRS Notice 2014-54, a single distribution containing both pre-tax and after-tax dollars can be split at the same time: the pre-tax portion into a traditional IRA, the after-tax portion into a Roth IRA.¹⁴ The after-tax portion moves into the Roth with little or no added tax because you already paid income tax on those dollars. Earnings on the after-tax contributions are pre-tax and flow with the traditional IRA rollover. Not every plan supports this, so check with the administrator before assuming it is available.

1
Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
2
Internal Revenue Service. 401(k) Resource Guide – Plan Participants – General Distribution Rules
3
Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
4
Internal Revenue Service. Large Gains, Lump Sum Distributions, Etc.
5
Internal Revenue Service. Topic No. 413, Rollovers From Retirement Plans
6
Office of the Law Revision Counsel. 26 USC 402 – Taxability of Beneficiary of Employees Trust
7
Internal Revenue Service. About Form 1099-R, Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, Etc.
8
Office of the Law Revision Counsel. 26 USC 408A – Roth IRAs
9
Internal Revenue Service. Publication 590-B, Distributions From Individual Retirement Arrangements
10
Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs
11
Internal Revenue Service. Net Unrealized Appreciation in Employer Securities Notice 98-24
12
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
13
Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs
14
Internal Revenue Service. Rollovers of After-Tax Contributions in Retirement Plans