The core difference: when you pay taxes

A traditional IRA lets you deduct contributions from your income taxes now, but you pay income tax on the money when you withdraw it in retirement. A Roth IRA takes the opposite approach: you contribute after-tax dollars (no deduction today), but withdrawals in retirement are tax-free.

This single difference ripples through almost everything else about the two accounts. Which one makes sense depends on whether you expect to be in a higher or lower tax bracket when you retire, and on how much control you want over when you take money out.

Key Takeaways

  • Traditional IRAs reduce your taxable income in the year you contribute, but you owe income tax on withdrawals after age 59½.
  • Roth IRAs offer no tax deduction now, but all may have access to withdrawals after age 59½ are completely tax-free.
  • Traditional IRAs require you to start taking withdrawals at age 73 (as of 2023); Roths have no required withdrawals during your lifetime.
  • Roth IRAs let you withdraw your contributions (not earnings) anytime without penalty; traditional IRAs penalize early withdrawals before 59½.
  • Income limits restrict who can contribute to a Roth IRA directly, but traditional IRAs have no income cap.

Tax deductions and income limits

With a traditional IRA, you can deduct your full contribution in the year you make it—up to the annual limit—if you have no workplace retirement plan. If you do have a 401(k) or similar plan at work, the deduction phases out once your income reaches a certain level. For 2024, that phase-out begins at $77,000 for single filers and $123,000 for married couples filing jointly, though the exact numbers change yearly.

Roth IRAs have income limits that prevent higher earners from contributing directly. For 2024, the ability to contribute the full amount phases out starting at $146,000 for single filers and $230,000 for married couples filing jointly. If your income exceeds these ranges, you cannot contribute to a Roth that year—though a workaround called a "backdoor Roth" exists for those who want one anyway.

Traditional IRAs have no income limit at all. Anyone with earned income can open and contribute to one, regardless of how much they earn.

Withdrawals and required minimum distributions

With a traditional IRA, you must begin taking withdrawals—called required minimum distributions (RMDs)—starting the year you turn 73. The IRS calculates the minimum amount based on your age and account balance. If you do not take it, you face a penalty equal to 25% of the amount you should have withdrawn (reduced to 10% if you correct it within two years).

Roth IRAs have no required minimum distributions while you are alive. You can leave the money untouched for as long as you want, which makes them useful if you do not need the income or want to pass the account to heirs.

Early withdrawals before age 59½ carry a 10% penalty on both account types, with some exceptions (first-time home purchase, medical expenses, disability). However, Roth IRAs let you withdraw your contributions—the money you put in—anytime without penalty or taxes, because you already paid tax on it. With a traditional IRA, any withdrawal before 59½ is treated as taxable income plus the 10% penalty.

Tax-free growth and may have access to withdrawals

Both account types grow tax-free while the money sits inside. You do not pay annual taxes on dividends, interest, or capital gains. The difference is what happens when you take the money out.

A Roth withdrawal is tax-free only if you meet two conditions: you must be at least 59½ years old, and the account must have been open for at least five tax years. If you withdraw earnings before meeting both conditions, those earnings are taxed as income plus the 10% early withdrawal penalty. Your contributions, however, always come out tax-free.

Traditional IRA withdrawals are always taxable as ordinary income, regardless of your age or how long you have held the account. The only exception is if you made nondeductible contributions (contributions you did not deduct on your taxes), which come out tax-free; the rest is taxed.

Which account makes sense for your income level

If you expect to be in a lower tax bracket in retirement than you are now, a traditional IRA saves you more money overall. You get a deduction at a high tax rate today and pay tax at a lower rate later. This often fits people in their peak earning years who plan to spend less in retirement.

If you expect to be in the same or higher tax bracket in retirement, a Roth usually wins. You pay tax at today's rate (which may be lower than your retirement rate) and never pay tax again. This often fits younger workers, those early in their careers, or anyone who expects their income to rise significantly.

If you are unsure, a Roth offers more flexibility: you can access your contributions without penalty, you have no forced withdrawals, and tax-free growth compounds over decades. The trade-off is no deduction today.

Spousal IRAs and inherited accounts

If one spouse has no earned income, the working spouse can open and fund a spousal IRA in the non-working spouse's name, up to the annual limit. This works for both traditional and Roth IRAs and is useful for single-income households.

When you inherit an IRA, the rules differ by account type and your relationship to the original owner. Spouses can roll inherited traditional IRAs into their own accounts and treat them as if they owned them all along. Non-spouse beneficiaries must withdraw the entire balance within 10 years (as of 2024 rules). Inherited Roth IRAs follow the same withdrawal timeline, but the withdrawals are tax-free.

Contribution limits and catch-up contributions

Both traditional and Roth IRAs share the same annual contribution limit: $7,000 for 2024 if you are under 50, and $8,000 if you are 50 or older (the extra $1,000 is a catch-up contribution). These limits apply to your combined contributions across all IRAs you own—you cannot contribute $7,000 to a traditional IRA and another $7,000 to a Roth in the same year.

The limit changes yearly based on inflation, so check the IRS website or your financial institution for the current year's amount. If you have a workplace retirement plan like a 401(k), you can still contribute to an IRA, but the traditional IRA deduction may be limited if your income is high enough.

Frequently Asked Questions

Can I have both a traditional and Roth IRA at the same time?

Yes. Your combined contributions across all IRAs cannot exceed the annual limit, but you can split the money between them however you want. Some people use both: a traditional IRA for the immediate tax deduction and a Roth for tax-free growth later.

What happens if I withdraw from a traditional IRA before age 59½?

The withdrawal is taxed as ordinary income, and you owe a 10% early withdrawal penalty on top. Some exceptions exist—first-time home purchase (up to $10,000 lifetime), medical expenses, disability, and a few others—but most early withdrawals carry both the tax and penalty.

Can I convert a traditional IRA to a Roth?

Yes, through a process called a Roth conversion. You move money from a traditional IRA to a Roth and pay income tax on the amount converted in that tax year. This is useful if you expect tax rates to rise or want to lock in a lower rate now, but it increases your taxable income for the year of conversion.

Do I need earned income to open an IRA?

Yes, both traditional and Roth IRAs require earned income (wages, self-employment income, or similar). You cannot contribute more than you earned that year. A spouse with no income can have a spousal IRA funded by the working spouse's income.

Which IRA is better for long-term wealth building?

Roth IRAs often win for long-term growth because earnings are never taxed, and you have no forced withdrawals. However, if you need the tax deduction now and expect lower income later, a traditional IRA may be better. The answer depends on your current tax bracket, expected retirement income, and time horizon.