Neither is universally better—it depends on your tax bracket now versus later

A traditional IRA is better if you expect to be in a lower tax bracket in retirement than you are now. A Roth IRA is better if you expect to be in a higher tax bracket, or if you want tax-free withdrawals and no required withdrawals at age 73. The choice hinges on one question: do you want to reduce your taxes today, or avoid taxes in retirement?

With a traditional IRA, you deduct contributions from your income in the year you make them—lowering your taxable income right now. You pay taxes on the money when you withdraw it in retirement. With a Roth IRA, you contribute after-tax dollars (no deduction today), but withdrawals in retirement are tax-free. Both accounts grow tax-free while the money sits inside.

Most people choose based on their current income and what they think retirement will look like. If you are in your peak earning years and expect lower income later, traditional wins. If you are early in your career, expect your income to rise, or simply want certainty about what you will owe in retirement, Roth often makes more sense.

Key Takeaways

  • A traditional IRA gives you a tax deduction now but requires you to pay income tax on withdrawals in retirement; a Roth takes no deduction now but lets you withdraw tax-free later.
  • Choose traditional if your tax bracket is high today and you expect it to drop in retirement; choose Roth if you expect your tax bracket to stay the same or rise.
  • Traditional IRAs require you to begin withdrawals at age 73; Roth IRAs have no withdrawal requirement during your lifetime, letting you leave money to heirs tax-free.
  • Income limits apply to Roth contributions but not traditional contributions, though traditional contributions may not be fully deductible if you have a workplace retirement plan and earn above a certain threshold.
  • You can convert a traditional IRA to a Roth later, but you will owe income tax on the converted amount in that year.

When a traditional IRA makes more sense

A traditional IRA is the stronger choice if you are in a high tax bracket now and confident you will be in a lower one in retirement. The immediate tax deduction reduces your taxable income for the year, which can push you into a lower tax bracket or lower your overall tax bill. If you earn $85,000 and contribute $7,000 to a traditional IRA, you report only $78,000 in taxable income that year.

This strategy works best if you are in your 40s or 50s, earning peak income, and planning to retire on Social Security plus modest withdrawals from savings. It also works if you are self-employed or a business owner with variable income—you can contribute more in high-income years and less in low-income years, smoothing your tax burden.

Traditional IRAs also have no income limits. Anyone with earned income can contribute, regardless of how much they earn. A Roth IRA has income phase-out ranges; if you earn above those limits, you cannot contribute directly to a Roth (though you can use a backdoor Roth strategy, which is more complex).

When a Roth IRA makes more sense

A Roth IRA is the stronger choice if you are early in your career, expect your income to rise significantly, or simply want to lock in today's tax rate and never pay taxes on that money again. Because you contribute after-tax dollars, you do not get a deduction now—but that trade-off is worth it if you believe tax rates will be higher when you retire.

Roth IRAs are especially valuable if you are in a low tax bracket now. A 25-year-old earning $35,000 is in the 12% federal tax bracket. Contributing $7,000 to a Roth costs them $7,000 in after-tax income, but that money grows tax-free for 40 years. If they are in the 24% or 32% bracket in retirement, they have locked in the 12% rate forever.

Roth IRAs also offer flexibility that traditional IRAs do not. You can withdraw your contributions (not earnings) at any time without penalty or tax. You can leave money in the account for your entire life—there is no required withdrawal age. And you can pass a Roth to heirs, who can withdraw the balance tax-free (though they must empty it within 10 years under current rules).

How income limits affect your choice

Roth IRA contributions are limited by income. For 2024, if you are single, you can contribute the full amount if your modified adjusted gross income (MAGI) is below $146,000. The contribution phases out between $146,000 and $161,000, and you cannot contribute at all above $161,000. For married filing jointly, the phase-out range is $230,000 to $240,000. These numbers change yearly.

If your income exceeds the Roth limit, you have three options: contribute to a traditional IRA instead, use a backdoor Roth (contributing to a traditional IRA and immediately converting it to a Roth), or use a mega backdoor Roth if your employer plan allows it. A backdoor Roth works but requires careful planning if you already have traditional IRA balances, because the IRS taxes the conversion on a pro-rata basis.

Traditional IRA contributions have no income limit, but the deduction phases out if you have a workplace retirement plan like a 401(k) and earn above a threshold. For 2024, if you are single and covered by a workplace plan, the deduction phases out between $77,000 and $87,000 of MAGI. If you are married filing jointly and your spouse has a workplace plan, the phase-out is $123,000 to $133,000. If neither of you has a workplace plan, you can deduct the full contribution regardless of income.

Tax brackets and the math of conversion

The core calculation is simple: compare your tax bracket now to your expected bracket in retirement. If you are in the 24% bracket today and expect to be in the 12% bracket in retirement, a traditional IRA saves you 12 percentage points per dollar withdrawn. If you are in the 12% bracket today and expect to be in the 22% bracket in retirement, a Roth saves you 10 percentage points per dollar.

Federal tax brackets for 2024 are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Most people in early careers are in the 12% bracket. Most people in peak earning years are in the 22% to 24% bracket. In retirement, if you have modest income from Social Security and modest withdrawals, you might drop to 12% or even 10%.

You can also convert a traditional IRA to a Roth at any time. You pay income tax on the converted amount in that year, but the money then grows tax-free in the Roth. This strategy makes sense if you have a low-income year (a sabbatical, a job loss, early retirement before Social Security starts) and can convert at a lower tax rate than you expect to pay later.

Required withdrawals and estate planning

Traditional IRAs require you to take a minimum distribution each year starting at age 73. The IRS calculates this amount based on your age and account balance; you cannot avoid it. If you do not take the full amount, you owe a 25% penalty on the shortfall (reduced to 10% if you correct it within two years).

Roth IRAs have no required withdrawal age during your lifetime. You can leave the money untouched for decades if you do not need it. This is valuable if you are wealthy, have other income sources, or want to pass the account to heirs. When you die, heirs must withdraw the balance within 10 years, but the withdrawals are tax-free.

If you are married and your spouse is much younger, a Roth is also more flexible because your spouse can treat the inherited Roth as their own and continue deferring withdrawals. With a traditional IRA, your spouse must begin taking required distributions based on their age, which can trigger a larger tax bill.

Contribution limits and catch-up contributions

Both traditional and Roth IRAs have the same contribution limit: $7,000 per year for 2024 if you are under age 50. If you are 50 or older, you can contribute an additional $1,000 per year as a catch-up contribution, for a total of $8,000.

These limits are separate from any 401(k) or other workplace plan contributions. You can contribute to both a traditional IRA and a Roth IRA in the same year, but your combined contributions cannot exceed the annual limit. For example, you could contribute $4,000 to a traditional IRA and $3,000 to a Roth in the same year, but not $7,000 to each.

Frequently Asked Questions

Can I contribute to both a traditional and Roth IRA in the same year?

Yes, but your combined contributions cannot exceed the annual limit ($7,000 for 2024 if you are under 50). If you contribute $4,000 to a traditional IRA, you can contribute only $3,000 to a Roth that year. The limit applies to all IRAs you own combined.

What happens if I change my mind and want to switch from traditional to Roth?

You can convert a traditional IRA to a Roth at any time. You will owe income tax on the converted amount in that year, but the money then grows tax-free in the Roth. This works best in low-income years when the tax bill is smaller.

If I have a 401(k) at work, does that affect my IRA choice?

Yes. If you have a workplace plan, the deduction for traditional IRA contributions phases out at higher income levels. Roth contributions have no deduction, so income limits apply instead. Check the current phase-out ranges for your filing status before deciding.

Which is better if I am not sure what my retirement tax bracket will be?

If you are uncertain, a Roth is often the safer choice because you lock in today's tax rate and avoid the risk of higher rates later. You also gain flexibility—no required withdrawals, tax-free withdrawals for heirs, and the ability to access contributions early if needed.

Can I withdraw money from my IRA before retirement without a penalty?

With a Roth, you can withdraw your contributions (not earnings) anytime without penalty or tax. With a traditional IRA, withdrawals before age 59½ are generally subject to a 10% penalty plus income tax, though some exceptions exist (first-time home purchase, disability, medical expenses). Check the rules for your situation.