The answer depends on your tax bracket today versus what you expect in retirement

A traditional IRA lets you deduct contributions from your taxes this year, lowering what you owe to the IRS right now. You pay income tax on the money when you withdraw it in retirement. A Roth IRA takes after-tax dollars now—no deduction today—but the withdrawals in retirement are tax-free. Neither is universally "better." The right choice hinges on whether you need the tax break now or would rather avoid taxes later.

If you are in a high tax bracket today and expect to be in a lower one in retirement, traditional usually wins. If you are in a low bracket now and expect to earn more later, or simply want to lock in today's tax rates, Roth usually makes more sense. The catch: income limits restrict who can contribute to a Roth, and traditional IRAs have required withdrawals starting at age 73, while Roths do not.

Key Takeaways

  • Traditional IRA contributions reduce your taxable income this year; Roth contributions do not, but future withdrawals are tax-free.
  • You can contribute to a traditional IRA at any age and income level, but Roth contributions phase out once your income exceeds a certain threshold that changes yearly.
  • At age 73, you must begin taking required minimum distributions (RMDs) from a traditional IRA; Roths have no RMD requirement during your lifetime.
  • If you expect to be in a lower tax bracket in retirement, traditional is often the better choice; if you expect higher taxes later, Roth usually wins.
  • You can hold both types of accounts at the same time, and you can convert a traditional IRA to a Roth if your situation changes.

How the tax deduction works with a traditional IRA

When you contribute to a traditional IRA, you can deduct that amount from your income on your tax return—but only if you meet certain conditions. If you have a workplace retirement plan (a 401(k), 403(b), or similar), the deduction phases out once your income reaches a threshold. For 2024, that threshold starts at $77,000 for single filers and $123,000 for married couples filing jointly, though these numbers change yearly. If you have no workplace plan, you can deduct the full amount regardless of income.

The deduction lowers your taxable income, which means you pay less federal income tax this year. That is the immediate benefit. The trade-off: when you withdraw money from the account in retirement, every dollar comes out as ordinary income and is taxed at your marginal rate at that time. If you withdraw $50,000 from a traditional IRA in a year when you are in the 22% tax bracket, you owe $11,000 in federal income tax on that withdrawal.

How Roth contributions and withdrawals work

You fund a Roth IRA with after-tax money—money you have already paid income tax on. You get no deduction on your tax return. But once the money is in the account and grows, you never pay federal income tax on it again. Withdrawals in retirement are completely tax-free, including all the growth.

The catch is income limits. For 2024, you cannot contribute to a Roth if your modified adjusted gross income (MAGI) exceeds $161,000 as a single filer or $240,000 as a married couple filing jointly. These limits rise yearly. If your income is above the limit, you have no direct access to a Roth—though you can use a "backdoor Roth" conversion, which involves contributing to a traditional IRA and then converting it to a Roth. This strategy has its own tax complications and is worth discussing with a tax professional if your income is high.

Required minimum distributions and flexibility

At age 73, the IRS requires you to start withdrawing money from a traditional IRA, whether you need it or not. These required minimum distributions (RMDs) are calculated based on your age and account balance, and you must withdraw at least that amount each year or face a 25% penalty on the shortfall (reduced to 10% if you correct it within two years). RMDs push taxable income into your return, which can bump you into a higher tax bracket and affect other benefits like Medicare premiums or Social Security taxation.

A Roth IRA has no RMD requirement during your lifetime. You can leave the money untouched for as long as you live, letting it grow tax-free. Your heirs will eventually have to withdraw it (under rules that changed in 2023), but you never have to. This makes a Roth especially valuable if you do not need the money in early retirement or if you want to pass a large tax-free nest egg to your children.

Comparing tax brackets: the core decision

The fundamental question is whether your tax rate will be higher or lower in retirement than it is today. If you are 35 years old, earning $65,000, and in the 22% federal tax bracket, a traditional IRA deduction saves you 22 cents per dollar contributed. If you retire at 67 and withdraw that money in a year when you are in the 12% bracket (because your income is lower), you have won: you saved 22% and paid only 12%. That is a 10-percentage-point gain.

Flip the scenario: you are 35, earning $150,000, in the 24% bracket, and you expect to earn $200,000 by retirement (or to have substantial retirement income from pensions, Social Security, and other sources). A traditional IRA deduction saves you 24% today, but you might withdraw in retirement at the 32% bracket. You have lost 8 percentage points. A Roth locks in the 24% rate you pay now and avoids the 32% rate later.

The uncertainty is real: you cannot know your future tax bracket with certainty. That is why many financial advisors suggest splitting contributions between both types if you can. Contribute some to traditional for the immediate deduction and some to Roth for tax-free growth. This hedges your bet against future tax rates.

Income limits and who can contribute

Traditional IRAs have no income limit. Anyone with earned income can contribute, regardless of how much they make. The only restriction is the deduction: if you have a workplace plan and earn above the phase-out threshold, you cannot deduct the contribution, though you can still contribute to the account (this creates a "non-deductible contribution," which has tax complications and is rarely worth doing).

Roth IRAs are income-restricted. The phase-out ranges for 2024 are $146,000 to $161,000 for single filers and $230,000 to $240,000 for married couples filing jointly. If your income falls within that range, you can contribute a reduced amount. Above the range, you cannot contribute directly. High earners often use a backdoor Roth: contribute to a traditional IRA (non-deductible) and immediately convert it to a Roth. This works, but it triggers taxes on any pre-existing traditional IRA balances you hold, so it is not a simple move.

Conversions and changing your mind

You can convert money from a traditional IRA to a Roth IRA at any time. When you do, you pay income tax on the amount converted in that tax year. This is useful if your income drops (due to job loss, retirement, or a business downturn) and you fall into a lower tax bracket. You can convert at a lower rate than you would have paid when you originally contributed.

Conversions are also a way to access Roth funds before age 59½ without penalty. Normally, Roth withdrawals before 59½ are penalized unless you meet specific exceptions. But if you convert a traditional IRA to a Roth and then wait five years, you can withdraw the converted amount penalty-free (though not the earnings on it). This five-year rule applies separately to each conversion, so timing matters.

You cannot undo a conversion—the IRS eliminated the "recharacterization" rule in 2018—so think carefully before converting. A tax professional can help you model whether a conversion makes sense in your situation.

Frequently Asked Questions

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

Yes. You can hold both accounts simultaneously. Your total contribution limit across both accounts is $7,000 per year (or $8,000 if you are 50 or older), so you cannot max out both—you have to split the limit between them. Many people do this to hedge their tax-rate bet.

What if my employer offers a 401(k)—does that affect my IRA choice?

Yes. If you have access to a workplace plan, the deduction for a traditional IRA phases out at lower income levels. You should max out your 401(k) first (especially if your employer matches), then decide between traditional and Roth for any IRA contributions. Some 401(k) plans also offer a Roth option, which works the same way as a Roth IRA.

Can I withdraw from a Roth IRA before retirement without penalty?

You can withdraw your contributions (the money you put in) anytime, tax-free and penalty-free. Withdrawals of earnings before age 59½ are penalized unless you meet specific exceptions like disability or a first-time home purchase (up to $10,000 lifetime). Conversions have their own five-year rule.

What happens to my IRA when I die?

Your heirs inherit the account, but they must withdraw the money within 10 years under current rules (with some exceptions for spouses and disabled beneficiaries). A Roth is more valuable to heirs because withdrawals are tax-free. A traditional IRA withdrawal is taxable income to them.

Should I convert my traditional IRA to a Roth if I expect tax rates to rise?

If you believe future tax rates will be significantly higher, a conversion can make sense—you pay tax today at a lower rate to avoid higher rates later. But conversions are taxable events, so you need cash outside the IRA to pay the tax bill. Consult a tax professional to model the numbers for your situation.