The choice depends on your tax bracket now versus what you expect in retirement

A traditional IRA lets you deduct contributions from your taxable income this year, lowering what you owe the IRS. You pay taxes later when you withdraw the money in retirement. A Roth IRA takes after-tax dollars now—no deduction today—but withdrawals in retirement are tax-free. Neither is universally "better." The right choice hinges on whether you think your tax rate will be higher or lower when you retire than it is right now.

If you expect to be in a lower tax bracket in retirement (because you'll have less income), a traditional IRA saves you money: you dodge taxes at a high rate now and pay at a low rate later. If you expect to be in a higher bracket, or you're young and have decades for growth, a Roth often wins because that growth compounds tax-free. Your income level also matters—high earners may not be able to contribute to a Roth at all, while traditional contributions phase out for some people with workplace retirement plans.

Key Takeaways

  • Traditional IRA contributions reduce your taxable income this year; Roth contributions do not, but Roth withdrawals in retirement are tax-free.
  • Choose traditional if you expect a lower tax bracket in retirement; choose Roth if you expect a higher one or want tax-free growth over decades.
  • Income limits restrict who can contribute to a Roth; traditional contributions may be limited if you have a workplace retirement plan and earn above a certain threshold.
  • You can hold both types at the same time, and you can convert a traditional IRA to a Roth (though you'll owe taxes on the conversion).

When a traditional IRA makes sense

A traditional IRA is the stronger choice if your income is high right now and you expect it to drop in retirement. The tax deduction you get this year is worth more than the taxes you'll owe later, because you're paying at a lower rate. This is especially true if you're self-employed or have a spike year of income—the deduction can meaningfully reduce what you owe.

Traditional IRAs also work well if you're in your 50s or 60s and haven't saved much yet. You can make catch-up contributions (an extra $1,000 per year if you're 50 or older, on top of the regular limit), and the immediate tax deduction helps offset years of not saving. You'll still owe taxes on withdrawals later, but you've at least reduced your tax bill now when you need it most.

One more scenario: if you have a lot of pre-tax money already (from a 401(k) or previous traditional IRA), a Roth conversion might trigger a large tax bill. Sticking with traditional contributions avoids that problem and keeps your money in the same tax-deferred bucket.

When a Roth IRA makes sense

A Roth IRA is the stronger choice if you're young, expect your income to rise over time, or think tax rates will be higher in the future. Your money grows for 30 or 40 years tax-free, and you never pay taxes on the growth or the withdrawals. That compounding advantage is enormous over a long timeline.

Roth IRAs also make sense if you're currently in a low tax bracket—maybe you're early in your career, taking a sabbatical, or have a year of lower income. Paying taxes now at a low rate and locking in tax-free growth is a smart trade. You also get more flexibility: you can withdraw your contributions (not the earnings) anytime without penalty, which makes a Roth a partial emergency fund if you need it.

A Roth is also the only choice if your income is too high for a traditional IRA deduction. If you have a workplace 401(k) and earn above the phase-out limit (which varies by year and filing status), you can't deduct traditional contributions. A Roth has income limits too, but they're higher, and you can use a "backdoor Roth" strategy to work around them if needed.

Income limits and contribution caps

For 2024, you can contribute up to $7,000 per year to either type of IRA ($8,000 if you're 50 or older). But income limits affect which type you can use. Roth contributions phase out if your income exceeds a certain level—the exact threshold depends on your filing status and changes yearly. If you earn too much, you simply cannot contribute to a Roth directly.

Traditional IRA contributions are never limited by income, but the tax deduction phases out if you have a workplace retirement plan (like a 401(k)) and earn above a threshold. This means you can contribute to a traditional IRA, but you won't get the tax break. That's usually not worth doing, since you'd be paying taxes twice on the same money.

Check the IRS website or your tax software each year for the current limits. They shift annually, and your filing status (single, married filing jointly, married filing separately) changes which limit applies to you.

Conversions and the backdoor Roth strategy

You can convert money from a traditional IRA to a Roth, but you'll owe income taxes on the amount you convert in that year. This is useful if you expect tax rates to rise, or if you're in a low-income year and can afford the tax bill. Some people do a "backdoor Roth" by contributing to a traditional IRA (which has no income limit) and immediately converting it to a Roth. You pay taxes on the conversion, but you end up with Roth money even though your income was too high to contribute directly.

Conversions are complex if you already have traditional IRA money, because the IRS treats all your traditional IRAs as one pool for tax purposes. If you convert $10,000 but have $90,000 in other traditional IRAs, you'll owe taxes on 10% of the total ($10,000 out of $100,000), not just on the $10,000 you converted. Talk to a tax professional before converting if you have multiple IRAs.

Holding both types at the same time

You can open and fund both a traditional and a Roth IRA in the same year. Your total contribution across both accounts cannot exceed the annual limit ($7,000 in 2024, or $8,000 if you're 50+). So you might put $4,000 in a traditional IRA and $3,000 in a Roth, for example.

Some people do this deliberately: they use a traditional IRA for the immediate tax deduction and a Roth for tax-free growth. Others use it as a hedge against uncertainty about future tax rates. If you're unsure whether rates will be higher or lower, splitting your contributions lets you benefit from both scenarios.

Required withdrawals and flexibility

Traditional IRAs require you to start taking withdrawals at age 73 (as of 2023; the age has been rising gradually). These are called required minimum distributions, or RMDs. You must withdraw a calculated amount each year, whether you need the money or not, and you'll owe income taxes on every dollar.

Roth IRAs have no RMD requirement during your lifetime. You can leave the money untouched and let it grow, or withdraw only what you need. This makes a Roth more flexible in retirement and better for leaving money to heirs (they inherit tax-free growth, though they do have to withdraw the balance within 10 years under current rules).

Frequently Asked Questions

Can I change my mind and convert a Roth back to a traditional IRA?

No, you cannot reverse a Roth conversion. Once money is in a Roth, it stays there. However, you can undo a regular Roth contribution (not a conversion) by requesting a recharacterization from your IRA custodian, but this must happen before your tax return is due. Conversions cannot be recharacterized.

What if I have both a 401(k) at work and an IRA?

You can have both. Contributions to each are separate and don't count toward the same limit. However, if you have a 401(k) at work, it may affect whether you can deduct a traditional IRA contribution. Your Roth IRA contributions are not affected by a 401(k), but Roth income limits still apply.

Which one should I pick if I'm not sure about my future tax rate?

If you're genuinely uncertain, a Roth is often the safer bet, especially if you're young. Tax-free growth over decades is powerful, and you have more withdrawal flexibility. You can always do a backdoor Roth later if your income rises. If you're older and need the immediate tax deduction, go traditional.

Do I have to choose one or the other, or can I use both?

You can use both in the same year, as long as your total contributions across both accounts don't exceed the annual limit. Some people split contributions to hedge their bets on future tax rates.

What happens to my IRA if I die?

Your beneficiary inherits the IRA, but the tax treatment differs. Roth beneficiaries inherit tax-free withdrawals; traditional IRA beneficiaries owe income taxes on withdrawals. Both must withdraw the balance within 10 years (with some exceptions for spouses). A Roth is generally better for leaving money to heirs.