Key Takeaways
- A rollover IRA is legally a traditional IRA holding pre-tax 401(k) money taxed as ordinary income at withdrawal.
- Required minimum distributions on a rollover IRA begin at age 73, rising to 75 for those born in 1960 or later (earliest age-75 RMD year 2035).
- The 2026 Roth IRA contribution limit is $7,500, or $8,600 if you are 50 or older.
- Direct Roth IRA contributions phase out between $153,000 and $168,000 for single filers and $242,000 to $252,000 for married filing jointly in 2026.
- Converting $100,000 of pre-tax rollover money adds $100,000 to that year’s ordinary income.
- The pro-rata rule aggregates every traditional, rollover, SEP, and SIMPLE IRA on December 31; with $93,000 pre-tax and a $7,000 nondeductible contribution, only 7% of a conversion counts as tax-free basis.
- Each Roth conversion carries its own 5-year clock measured from January 1 of the conversion year.
Rollover IRA vs Roth IRA: 2026 figures
Figures reflect 2026 federal rules as stated in this article.
A rollover IRA vs Roth IRA decision comes down to one question: when do you pay the tax? A rollover IRA holds pre-tax dollars from an old 401(k) and is taxed as ordinary income when you withdraw. A Roth IRA holds after-tax dollars, so qualified withdrawals come out tax-free. Moving money from the first into the second is a taxable conversion you can plan around.
Talk With Craig Wear's Team
Craig has helped IRA millionaires save over $1 million each in unnecessary taxes. Find out if a Roth conversion strategy fits your retirement, with no sales pressure and no product pitch.
A rollover IRA is legally a traditional IRA holding pre-tax 401(k) money, taxed as ordinary income at withdrawal, with required minimum distributions starting at age 73. A Roth IRA holds after-tax money, grows and pays out tax-free, and has no lifetime RMDs. Converting rollover-IRA dollars to a Roth adds the full amount to that year’s taxable income.
Rollover IRA vs Roth IRA at a glance
The two accounts differ on a single axis: tax timing. A rollover IRA defers tax, so you contribute pre-tax and pay ordinary income tax on every dollar withdrawn later. A Roth IRA taxes you upfront, so growth and qualified withdrawals are tax-free. The table below compares funding, growth, withdrawals, RMDs, income limits, and 2026 contribution rules side by side.
| Feature | Rollover IRA (traditional) | Roth IRA |
|---|---|---|
| Funding source | Pre-tax 401(k) or 403(b) dollars | After-tax dollars |
| Tax on contributions | None (already pre-tax) | Paid in the year you contribute |
| Tax on growth | Tax-deferred | Tax-free |
| Tax on qualified withdrawals | Ordinary income tax | Tax-free |
| Required minimum distributions | Begin at age 73 | None during the owner’s lifetime |
| Income limit to contribute | None (this is a rollover, not a contribution) | Phases out $153,000 to $168,000 single, $242,000 to $252,000 married filing jointly (2026) |
| 2026 annual contribution limit | $7,500 ($8,600 if age 50 or older) | $7,500 ($8,600 if age 50 or older) |
| Early-withdrawal penalty | 10% before age 59½ on the taxable amount | 10% before age 59½ on earnings and on converted amounts inside 5 years |
What is a rollover IRA, and how is it taxed?
A rollover IRA is an account that receives pre-tax money moved out of an employer plan such as a 401(k). It is not a separate legal category: the IRS treats it as a traditional IRA. Every dollar keeps its pre-tax status, grows tax-deferred, and is taxed as ordinary income when you take it out. Required minimum distributions apply.
Why a rollover IRA is really just a traditional IRA
The word “rollover” describes how the money arrived, not a distinct account type. Custodians label it a rollover IRA mainly to track that the balance came from an employer plan. For tax purposes, the IRS aggregates it with any other traditional, SEP, or SIMPLE IRA you hold. If you want the full definition, see our companion explainer on what a rollover IRA is.
Pre-tax money in, ordinary income tax on the way out
Because you never paid tax on 401(k) contributions or their growth, the government collects on the back end. Distributions are added to your other income and taxed at your marginal rate. In 2026 the 22% bracket starts at $50,400 (single) and $100,800 (married filing jointly), and the 24% bracket runs up to $201,775 (single) and $403,550 (married filing jointly).
RMDs start at age 73
Under SECURE 2.0, required minimum distributions on a rollover or traditional IRA begin at age 73. The starting age rises to 75 for those born in 1960 or later, meaning the earliest age-75 RMD year is 2035. RMDs force taxable income out whether you need the cash or not. Our guide to required minimum distributions for 2026 covers the calculation.
What is a Roth IRA, and why are withdrawals tax-free?
A Roth IRA is funded with after-tax dollars, so you pay income tax before the money goes in. In exchange, growth compounds tax-free and qualified withdrawals (after age 59½ and a 5-year holding period) come out with no federal income tax. A Roth IRA also has no required minimum distributions during the original owner’s lifetime.
After-tax dollars in, tax-free qualified withdrawals out
You fund a Roth with income you have already been taxed on. Once the account is at least 5 years old and you are 59½ or older, both your contributions and all investment growth come out free of federal income tax. That flips the rollover-IRA arrangement: you settle the tax bill now instead of at withdrawal.
No lifetime RMDs
A Roth IRA carries no required minimum distributions for the account owner, so the balance can keep compounding untouched for as long as you live. This is one reason many investors move pre-tax money toward a Roth before RMD age: shrinking the traditional balance can lower the RMDs that would otherwise stack onto their taxable income each year.
2026 Roth income and contribution limits
The 2026 Roth IRA contribution limit is $7,500, or $8,600 if you are 50 or older. Direct contributions phase out between $153,000 and $168,000 of modified adjusted gross income for single filers, and $242,000 to $252,000 for married filing jointly. A rollover or a conversion, by contrast, has no income limit at all.
The core difference: when do you pay the tax?
A rollover IRA and a Roth IRA can hold the exact same investments and earn the same return. The difference is purely the timing of tax. A rollover IRA defers it to withdrawal at your future ordinary rate. A Roth IRA charges it today. Which wins depends on whether your tax rate is higher now or later.
Same money, opposite tax timing
If your tax rate in retirement will be lower than it is today, deferring inside a rollover IRA can make sense. If your rate today is unusually low, or you expect higher rates later (from RMDs, Social Security, or a surviving spouse filing single), paying now through a Roth can be the better arithmetic. Our Roth conversion break-even guide works through the math.
Can I convert a rollover IRA to a Roth IRA?
Yes. You can convert any amount of a rollover IRA to a Roth IRA, and there is no income limit on a conversion. The catch is that the full pre-tax amount you convert, plus any growth, is added to that year’s ordinary income and taxed. A conversion is irreversible and must be completed by December 31.
Yes, but the full pre-tax balance is added to this year’s income
Converting $100,000 of pre-tax rollover money adds $100,000 to your taxable income for that year. That can push you into a higher bracket, raise your Medicare Part B and Part D premiums through IRMAA two years later, and interact with the net investment income tax on your other income. The conversion amount itself is not net investment income, but it can lift the MAGI that exposes other income to the 3.8% NIIT.
How the conversion bridge works: partial conversions to fill your tax bracket
A conversion does not have to be all-or-nothing. Many investors treat it as a multi-year bridge, converting just enough each year to fill the top of a target bracket without spilling into the next one. For example, a married couple might convert up to the $403,550 top of the 24% bracket in 2026, then repeat annually. Our tool on how much to convert to a Roth helps size each tranche.
The best years to convert
Conversions often work hardest in low-income years, during market dips (you convert more shares for the same tax), and in the window between retirement and age 73 before RMDs begin. You cannot convert an RMD itself, so once RMDs start you must take the RMD first. The December 31 Roth conversion deadline for 2026 is firm.
The pro-rata trap: how a rollover IRA can wreck a future backdoor Roth
Keeping pre-tax money in a rollover IRA can poison a future backdoor Roth. When you convert a nondeductible contribution, the IRS does not let you cherry-pick the after-tax dollars. It aggregates every traditional, rollover, SEP, and SIMPLE IRA you own and taxes the conversion proportionally. A large pre-tax rollover balance makes most of any backdoor conversion taxable.
The IRS aggregates every traditional, rollover, SEP, and SIMPLE IRA
The pro-rata rule looks at your combined IRA balances on December 31, not at individual accounts. If you hold $93,000 of pre-tax rollover money and add a $7,000 nondeductible contribution to run a backdoor Roth, only 7% of any conversion is treated as tax-free basis. The other 93% is taxable, even though you intended to convert only the new $7,000.
The fix: reverse-roll pre-tax money into your 401(k)
The common fix is a reverse rollover: move the pre-tax rollover-IRA balance into your current employer’s 401(k), if the plan accepts incoming rollovers. That empties your traditional IRA basis to $0 by year-end, which clears the pro-rata calculation and lets a backdoor Roth convert with little or no tax. Only pre-tax dollars can go back into a 401(k); after-tax basis stays in the IRA.
Form 8606 and why the math is per-dollar, not per-account
You report nondeductible basis and conversions on IRS Form 8606, which runs the pro-rata calculation on your aggregate IRA balance. Because the math is per-dollar across all IRAs, holding pre-tax and after-tax money in separate accounts does not separate them for tax. This is the detail most rollover-IRA-versus-Roth comparisons skip, and it is where a plan built on paper can fall apart.
The two 5-year rules people confuse
Two separate 5-year clocks apply to Roth IRAs, and they are easy to mix up. One governs converted dollars and penalty-free access to them. The other governs whether your earnings are qualified and tax-free. Each conversion starts its own clock, while the contribution clock starts once and covers all your Roth accounts.
The conversion 5-year clock (per conversion)
Each Roth conversion starts its own 5-year clock. If you withdraw converted amounts before that clock and before age 59½, a 10% penalty can apply to those dollars (you already paid the income tax at conversion). A conversion in 2026 and another in 2027 each carry a distinct 5-year window measured from January 1 of the conversion year.
The contribution 5-year clock
The contribution 5-year clock is separate and runs from January 1 of the first year you funded any Roth IRA. It determines whether your earnings come out tax-free. Once you are past age 59½ and this single clock has run 5 years, earnings are qualified. Because it starts only once, opening a Roth early, even with a small amount, starts the timer.
When to choose each (decision guide)
There is no single right answer between a rollover IRA and a Roth IRA. The choice turns on your current versus expected future tax rate, your RMD exposure, whether you plan a backdoor Roth, and how much tax you can absorb in a given year. The lists below outline conditions where each often fits.
Keeping it in a rollover IRA may fit if
- You expect a meaningfully lower tax rate in retirement than today.
- You have no plan to use the backdoor Roth strategy.
- You cannot comfortably pay the conversion tax from outside funds.
- You are already in a high bracket this year and want to defer.
Converting to a Roth may fit if
- You are in a low-income or low-bracket year (early retirement, a gap year).
- You want to reduce future RMDs and their tax drag after age 73.
- You need a clean $0 IRA balance to run a backdoor Roth.
- You expect higher tax rates later or a shift to single-filer status. Our Roth conversion planning service models these cases, and our overview of Roth versus traditional IRAs compares the contribution accounts.
Work with Q3 Advisors
Q3 Advisors is a registered investment adviser focused on retirement tax planning. This page is educational and is not advice; consult a qualified professional.
Frequently asked questions
Can I convert a rollover IRA to a Roth IRA?
Yes. You can convert all or part of a rollover IRA to a Roth IRA, and no income limit applies to a conversion. The converted pre-tax amount is added to your taxable income for that year. A conversion is irreversible and must be completed by December 31. See our guide to the rules and tax implications.
Do I pay taxes when I convert a rollover IRA to a Roth IRA?
Yes. Because rollover-IRA money is pre-tax, converting it triggers ordinary income tax on the full amount converted plus any growth. There is no early-withdrawal penalty on the conversion itself, but the added income can raise your bracket and, two years later, your Medicare IRMAA surcharges. Paying the tax from outside funds usually preserves more in the Roth.
Is it better to roll a 401(k) into a traditional IRA or a Roth IRA?
It depends on your tax picture. Rolling a 401(k) into a traditional (rollover) IRA is not a taxable event and defers tax to withdrawal. Rolling straight into a Roth IRA taxes the full pre-tax amount now. Many investors roll to a traditional IRA first, then convert in planned tranches to control which bracket the income lands in.
Which has better tax advantages, a rollover IRA or a Roth IRA?
Neither is universally better; they optimize for different tax situations. A rollover IRA defers tax, which can help if your future rate is lower. A Roth IRA delivers tax-free growth, no lifetime RMDs, and tax-free withdrawals, which can help if your future rate is higher. The right answer depends on your current versus expected marginal rate.
Can I have both a rollover IRA and a Roth IRA?
Yes. You can hold a rollover IRA and a Roth IRA at the same time, and many people do. Keep in mind that the IRS aggregates all your traditional, rollover, SEP, and SIMPLE IRA balances when applying the pro-rata rule to conversions, so a pre-tax rollover balance can affect the tax on a backdoor Roth done through a separate account.
Are there required minimum distributions on a rollover IRA?
Yes. A rollover IRA is a traditional IRA for tax purposes, so required minimum distributions begin at age 73 under SECURE 2.0, rising to 75 for those born in 1960 or later. A Roth IRA has no lifetime RMDs. Converting pre-tax rollover money to a Roth before age 73 can reduce the RMDs you would otherwise face.
What is the 5-year rule for Roth conversions?
The Roth conversion 5-year rule means each conversion must season for 5 years before you can withdraw those converted dollars penalty-free if you are under 59½. It runs from January 1 of the conversion year and is separate from the contribution 5-year clock that governs whether your earnings are tax-free. Each conversion carries its own clock.
Is my entire rollover IRA taxed when I convert it?
Only the amount you convert is taxed, and only if it is pre-tax. If your entire rollover IRA is pre-tax and you convert all of it, the whole balance is added to that year’s ordinary income. Converting part of it taxes only that portion. Any after-tax basis you have reported on Form 8606 is not taxed again.
