Pick based on your tax situation today, not a guess about tomorrow

The choice between a traditional and Roth IRA comes down to one question: do you want the tax break now or later? A traditional IRA lets you deduct contributions from your taxable income this year, lowering what you owe the IRS. A Roth IRA takes no deduction now, but the money grows tax-free and you withdraw it tax-free in retirement. Neither is universally better—the right choice depends on your income bracket today versus where you expect to be when you retire.

Most people overthink this by trying to predict future tax rates. You cannot know what Congress will do in 30 years. What you do know is your tax bracket right now. If you are in a high bracket today and expect to be in a lower one in retirement, a traditional IRA makes sense. If you are in a low bracket now and expect to earn more later, a Roth makes sense. If you are unsure, splitting contributions between both types hedges your bet.

Key Takeaways

  • A traditional IRA reduces your taxable income this year, which helps if you are in a high tax bracket now and expect to earn less in retirement.
  • A Roth IRA costs you nothing in tax deductions now, but all growth and withdrawals are tax-free later, which helps if you expect to earn more in retirement or want tax-assistance programs available.
  • You can contribute to both types in the same year as long as your combined contributions do not exceed the annual limit, which varies by year.
  • Income limits apply to Roth contributions and traditional IRA deductions, so your earnings may restrict which option is available to you.
  • If you change your mind, you can convert a traditional IRA to a Roth, though you will owe income tax on the amount converted that year.

When a traditional IRA makes the most sense

Choose a traditional IRA if you want to lower your taxable income right now. When you contribute, that money comes off the top of your income before taxes are calculated. If you earn $65,000 and contribute $7,000 to a traditional IRA, you report $58,000 in taxable income instead. At a 22% tax rate, that saves you about $1,540 in federal taxes that year.

This works best if you are currently in a higher tax bracket than you expect to be in retirement. A person earning $120,000 a year who plans to live on $50,000 in retirement benefits from the deduction now. You also cannot deduct traditional IRA contributions if you have a workplace retirement plan (like a 401(k)) and earn above a certain income threshold—currently around $77,000 for single filers and $123,000 for married filers filing jointly, though these limits change yearly. If you are in that situation, a traditional IRA still works, but the contribution is not tax-deductible.

One more thing: you must start taking withdrawals from a traditional IRA at age 73 (as of 2023; this age has shifted over time). The IRS calls these required minimum distributions, or RMDs. You cannot leave the money untouched indefinitely. If you do not want to be forced to withdraw, a Roth avoids this requirement entirely.

When a Roth IRA makes the most sense

Choose a Roth IRA if you expect to earn more in retirement than you do now, or if you simply want the flexibility of tax-free withdrawals later. You get no deduction this year, but every dollar of growth and every withdrawal in retirement is tax-free. If you invest $7,000 at age 35 and it grows to $80,000 by age 65, you owe zero tax on that $73,000 gain when you withdraw it.

A Roth also gives you more flexibility in retirement. You can withdraw your contributions (not the earnings) at any time without penalty, which makes it a partial emergency fund if you need it. You can also leave the money untouched as long as you want—there are no required minimum distributions. This matters if you do not need the money and want to pass it to heirs tax-free, or if you simply want to control when you take withdrawals.

The catch is income limits. For 2024, you cannot contribute to a Roth IRA if you earn more than $161,000 as a single filer or $240,000 as a married couple filing jointly (these limits change yearly). If you are above those thresholds, you have other options—a backdoor Roth or a mega backdoor Roth—but they require more paperwork. If you are below the limits, a Roth is straightforward.

How income limits affect your choice

Income limits are the hidden gatekeeper. For a traditional IRA, you can always contribute, but the deduction phases out if you have a workplace 401(k) and earn above the threshold. For a Roth, you cannot contribute at all once you hit the income ceiling.

If you are self-employed or have no workplace retirement plan, traditional IRA deductions have no income limit—you can deduct the full contribution no matter how much you earn. If you do have a workplace plan, the deduction phases out starting around $77,000 for single filers. Above roughly $87,000, you cannot deduct a traditional IRA contribution at all, though you can still contribute (it just will not reduce your taxes).

For a Roth, the income phase-out range is wider. For 2024, single filers can contribute the full amount up to $146,000, then the contribution limit shrinks gradually until it hits zero at $161,000. Married couples filing jointly can contribute fully up to $230,000, with the limit disappearing at $240,000. If you are above these ranges, a backdoor Roth (converting a non-deductible traditional IRA to a Roth) is the standard workaround, though it involves extra tax forms.

Splitting contributions between both types

You do not have to choose one or the other. You can contribute to both a traditional and a Roth IRA in the same year, as long as your combined contributions do not exceed the annual limit. For 2024, that limit is $7,000 if you are under 50, and $8,000 if you are 50 or older.

Splitting is a reasonable hedge if you are uncertain about your future tax bracket. You might put $3,500 in a traditional IRA to get a tax break now, and $3,500 in a Roth to lock in tax-free growth. This way, part of your retirement income comes from pre-tax money (traditional) and part comes from tax-assistance programs (Roth), giving you flexibility in how much taxable income you report each year in retirement.

The downside is that you are managing two accounts instead of one, and you have to track contributions separately for tax purposes. If simplicity matters to you, pick one and stick with it.

Converting a traditional IRA to a Roth later

If you open a traditional IRA and later decide you want the tax-free growth of a Roth, you can convert it. You move the money from the traditional account to a Roth account, and you pay income tax on the amount converted that year. If you convert $20,000 and you are in the 22% tax bracket, you owe about $4,400 in federal taxes on the conversion.

This strategy makes sense if your income drops in a particular year—say you take a sabbatical, lose a job temporarily, or retire early before claiming Social Security. Converting in a low-income year means you pay less tax on the conversion. It also makes sense if you have a non-deductible traditional IRA (money you contributed but could not deduct) and want to move it to a Roth without paying tax twice.

One warning: if you have multiple traditional IRAs, the IRS treats them as one account for conversion purposes. If you have $50,000 in traditional IRAs and convert $20,000 to a Roth, the IRS calculates the tax as if you converted a mix of pre-tax and after-tax money, even if the $20,000 you moved was all after-tax. This is called the pro-rata rule, and it can make conversions more expensive than expected. A tax professional can help you navigate this.

What happens if your income changes

Life is not linear. You might start in a low tax bracket, contribute to a Roth, then get a promotion and move into a higher bracket. Or you might be high-earning now and plan to retire early on less. The good news is that your IRA choice is not permanent.

If you contributed to a Roth and later regret it, you can recharacterize the contribution as a traditional IRA contribution (moving it back, in effect). You have until the tax-filing deadline of the following year to do this. If you contributed to a traditional IRA and want to switch to a Roth, you can convert at any time, though you will owe taxes on the conversion.

The real flexibility comes from having both types over time. Someone might contribute to a traditional IRA in high-earning years and a Roth in lower-earning years. By retirement, they have a mix of pre-tax and tax-assistance programs, which lets them manage their taxable income strategically.

Frequently Asked Questions

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

Yes. Your combined contributions to both accounts cannot exceed the annual limit ($7,000 for 2024 if you are under 50, $8,000 if you are 50 or older). You could put $4,000 in a traditional IRA and $3,000 in a Roth, for example. Each account is tracked separately for tax purposes.

What if I earn too much for a Roth but want one anyway?

A backdoor Roth is the standard solution. You contribute to a non-deductible traditional IRA, then immediately convert it to a Roth. You pay tax only on any earnings that occurred during the conversion, not on the contribution itself. This requires filing Form 8606 with your tax return. A tax professional can walk you through it.

Do I have to withdraw from my IRA at a certain age?

Traditional IRAs require withdrawals starting at age 73 (as of 2023). Roth IRAs have no required minimum distributions during your lifetime, so you can leave the money untouched as long as you want. This is one reason some people prefer Roths for long-term wealth building.

What if I need the money before retirement?

With a traditional IRA, early withdrawals before age 59½ usually trigger a 10% penalty plus income tax. A Roth IRA lets you withdraw your contributions (not earnings) at any time without penalty or tax. You can also withdraw earnings penalty-free in certain situations, like buying a first home or paying for education.

Should I choose based on what I think tax rates will be in the future?

Not as your main reason. Future tax rates are unknowable, and most people overestimate how much they will change. Base your decision on your tax bracket today and your realistic retirement income. If you are unsure, splitting contributions between both types removes the need to predict the future.