The difference between a rollover IRA and a Roth IRA comes down to when you pay taxes. A rollover IRA holds pre-tax money moved from a 401(k) or similar employer plan, and every dollar you take out in retirement is taxed as ordinary income. A Roth IRA holds money you have already paid tax on, and qualified withdrawals — including decades of investment growth — come out completely tax-free. That single distinction drives everything else that separates the two accounts: contribution rules, income limits, required withdrawals, and whether it makes sense to convert one into the other.
What Each Account Actually Is
A rollover IRA is not a distinct account type. It is a traditional IRA that receives funds from an employer-sponsored retirement plan such as a 401(k) or 403(b) when you leave a job or retire.1Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts Rolling the balance over instead of cashing out preserves the tax-deferred status of your savings and avoids an immediate tax bill. Investments inside the account grow without annual tax on dividends or capital gains, but every dollar you eventually withdraw is taxed at your ordinary income rate for that year.2Internal Revenue Service. Individual Retirement Arrangements (IRAs)
A Roth IRA flips the tax structure. Contributions go in with after-tax dollars, so there is no upfront deduction. In exchange, qualified distributions come out entirely tax-free.3Office of the Law Revision Counsel. 26 USC 408A – Roth IRAs A distribution qualifies once you are at least 59½ and at least five tax years have passed since you first funded any Roth IRA. The five-year clock starts on January 1 of the tax year for which you made your first Roth contribution, so a contribution made in April 2026 for the 2025 tax year starts the clock on January 1, 2025.
Roth IRAs also treat withdrawals in a specific order: your direct contributions come out first, then converted amounts (oldest first), and finally earnings.4Internal Revenue Service. Publication 590-B – Distributions From Individual Retirement Arrangements Because you already paid tax on contributions, you can pull them back out at any age without owing tax or penalty. A rollover IRA offers no such flexibility. Every early withdrawal is fully taxable and generally hit with an additional 10% penalty before 59½.
Contribution Rules and Income Limits
For 2026, the combined annual contribution limit across all your traditional and Roth IRAs is $7,500, or $8,600 if you are 50 or older.5Internal Revenue Service. Retirement Topics – IRA Contribution Limits Split it however you like between the two, but the total is capped. Put $3,000 into a traditional IRA and you have $4,500 left for a Roth (or $5,600 with the catch-up).
A rollover IRA has no income restrictions on receiving transferred funds. Anyone leaving a job can move an employer plan balance into one regardless of earnings. Whether you can deduct new contributions to that traditional IRA is a separate question. If you or your spouse is covered by a workplace retirement plan, the deduction phases out over set income ranges. For 2026, single filers covered by a workplace plan lose the deduction between $81,000 and $91,000 of modified adjusted gross income. Married couples filing jointly, where the contributing spouse is covered, phase out between $129,000 and $149,000.6Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Above the range you can still contribute, just not deduct it.
Roth IRAs are stricter. In 2026, single filers with MAGI between $153,000 and $168,000 can make only a reduced Roth contribution, and above $168,000 direct contributions are off the table. Married couples filing jointly phase out between $242,000 and $252,000.6Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 High earners locked out of direct Roth contributions sometimes use a backdoor conversion, which has its own complications discussed below.
Required Minimum Distributions
This is one of the biggest structural gaps between the two accounts. A rollover IRA forces you to start withdrawing money at a set age whether you need it or not. Under SECURE Act 2.0, the required beginning age is 73 for anyone reaching that age between 2023 and 2032, and 75 for anyone reaching it in 2033 or later.7Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs The annual amount is based on your account balance and IRS life expectancy tables, and the withdrawal counts as taxable income.
Miss a required minimum distribution and the penalty is 25% of the amount you should have taken. Catch and correct it within two years and the penalty drops to 10%.7Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs
Roth IRAs carry no required minimum distributions during the original owner’s lifetime. The money can stay invested and keep growing tax-free for as long as you live. That difference matters for two reasons: forced withdrawals from a rollover IRA can push you into a higher tax bracket in retirement and increase the taxable portion of your Social Security benefits, while a Roth simply keeps compounding.
Early Access Before 59½
Roth contributions come back out at any time, at any age, tax- and penalty-free, because the ordering rules pull direct contributions first.4Internal Revenue Service. Publication 590-B – Distributions From Individual Retirement Arrangements Earnings pulled early face income tax and the 10% additional tax unless an exception applies.
Rollover IRA withdrawals before 59½ are taxable and generally trigger the 10% additional tax on the full amount. Federal law does carve out exceptions to the 10% penalty for both account types, including total and permanent disability, substantially equal periodic payments, unreimbursed medical expenses above 7.5% of AGI, health insurance premiums while unemployed, qualified higher education costs, a first-time home purchase up to $10,000, birth or adoption expenses up to $5,000, federally declared disaster distributions up to $22,000, and a $1,000 emergency personal expense allowed once per calendar year under SECURE Act 2.0.8Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions The exception waives only the 10% penalty. Rollover IRA withdrawals remain fully taxable as income, and Roth earnings pulled under an exception still owe income tax.
Converting a Rollover IRA to a Roth IRA
You can move money from a rollover IRA into a Roth IRA at any time, at any income level, in any amount. There is no cap. The cost is that the entire pre-tax amount you convert gets added to your ordinary income for that year, so a large conversion can push you into a higher bracket. The conversion is reported on IRS Form 8606.9Internal Revenue Service. Instructions for Form 8606
The conversion itself is exempt from the 10% early withdrawal penalty because the IRS treats it as a rollover, not a distribution.8Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions But a separate five-year clock applies to each conversion. If you are under 59½ and pull converted money out of the Roth within five years of that particular conversion, the 10% penalty applies to the taxable portion. State income tax may also apply to the converted amount depending on where you live.
The Backdoor Roth and the Pro-Rata Rule
High earners shut out of direct Roth contributions sometimes make a nondeductible contribution to a traditional IRA and then convert it to a Roth. The move works cleanly only if you have no other pre-tax IRA money — no rollover IRA, SEP IRA, or SIMPLE IRA. If you do, the pro-rata rule calculates the taxable portion of the conversion based on the ratio of pre-tax to after-tax dollars across all your traditional IRAs combined.10Internal Revenue Service. Rollovers of After-Tax Contributions in Retirement Plans You cannot cherry-pick only the after-tax dollars.
Say you make a $7,500 nondeductible contribution to a traditional IRA but also hold a rollover IRA with $92,500 in pre-tax funds. Your total IRA balance is $100,000, of which 92.5% is pre-tax. Convert $7,500 to a Roth and the IRS treats about $6,938 of it as taxable income. The backdoor barely saves you anything. One common fix is to roll the pre-tax rollover IRA balance into a current employer’s 401(k) before doing the conversion, since 401(k) balances do not count for the pro-rata calculation.
Which One to Use
If you are simply deciding where a 401(k) from an old job should go, a rollover IRA keeps the tax deferral intact and costs you nothing today. If you also want that money to grow tax-free from here on, a Roth conversion accomplishes it, at the price of a tax bill this year.
The core question is whether your tax rate is higher now or later. Higher now, lower later favors leaving the money in a rollover IRA and paying tax at the lower future rate. Lower now, higher later — early career, a temporary gap between jobs, an early retirement year before Social Security starts — favors converting to a Roth and locking in today’s rate. A Roth also avoids the forced RMD withdrawals that can raise your taxable income and Social Security tax exposure in your 70s.
Because a single large conversion can generate a big tax bill, many people convert in stages across several years, filling up their current bracket without spilling into the next. The window right after leaving one job and before starting another, when annual income is often lower than usual, tends to be the most tax-efficient time to move a rollover IRA into a Roth.