The answer depends on whether you need a tax break today or in retirement
A traditional IRA gives you a tax deduction now—you reduce your taxable income this year and pay taxes when you withdraw the money in retirement. A Roth IRA takes after-tax money now, grows tax-free, and you owe nothing when you pull it out later. Neither is universally "better." The right choice hinges on three things: your income level right now, what tax bracket you expect to be in during retirement, and how soon you need the money.
Most people choose based on their current situation rather than guessing about future tax rates. If you're in a high tax bracket now and expect to be in a lower one later, traditional usually wins. If you're in a lower bracket now and expect to earn more later—or you simply want tax-free growth—Roth often makes more sense. The good news: you can open either one, and the contribution limits are the same.
Key Takeaways
- Traditional IRAs let you deduct contributions from your taxes this year, but you pay income tax on withdrawals in retirement.
- Roth IRAs take after-tax dollars now, but all growth and withdrawals are tax-free in retirement, with no required withdrawals at any age.
- Your current income and expected retirement income are the main factors—high earners now often benefit from traditional; lower earners or those expecting higher future income often benefit from Roth.
- Income limits apply to Roth contributions if you earn above a certain threshold, but there are no income limits for traditional IRA contributions.
- You can contribute to both types in the same year as long as your total contributions across all IRAs do not exceed the annual limit.
When a traditional IRA makes sense
Choose traditional if you want to lower your taxable income this year and believe you'll be in a lower tax bracket in retirement. This is common for high earners, self-employed people, or anyone who expects to retire with less income than they earn now.
The math is straightforward: if you contribute $7,000 to a traditional IRA and you're in the 24% federal tax bracket, you save roughly $1,680 in taxes this year. That's money you can use now or invest elsewhere. You'll owe taxes on that $7,000 plus all the growth when you withdraw it, but if your tax bracket drops in retirement, you come out ahead.
Traditional IRAs also let you contribute regardless of how much you earn. There are no income limits. If you earn $500,000 a year, you can still fund a traditional IRA (though the deduction phases out if you have a workplace retirement plan and earn above a certain income—this varies by year and filing status).
When a Roth IRA makes sense
Choose Roth if you're in a lower tax bracket now, expect to earn more later, or simply want the certainty of tax-free withdrawals. Roth is especially useful if you're young, early in your career, or self-employed with variable income.
The appeal is flexibility and growth. You contribute after-tax money, but every dollar of growth—whether from interest, dividends, or capital gains—is yours tax-free in retirement. You also never have to withdraw the money. Traditional IRAs require you to start taking distributions at age 73 (as of 2023; this age changes with new tax law). With Roth, you can leave the account untouched and pass it to heirs tax-free.
Roth contributions also come out penalty-free if you need them before retirement, though the growth does not. This makes Roth a slightly more flexible emergency cushion than traditional.
The catch: Roth has income limits. For 2024, you cannot contribute the full amount if you earn above roughly $146,000 (single) or $230,000 (married filing jointly). These thresholds change yearly. If you earn above the limit, you can still fund a traditional IRA or use a backdoor Roth strategy (converting a traditional IRA to Roth), though that involves more paperwork.
How your tax bracket in retirement matters
The core question is whether your tax rate will be higher or lower in retirement than it is now. If you're 30 years old, earning $60,000, and expect to earn $120,000 by age 50, Roth likely wins—you pay tax at 22% now instead of 24% or higher later. If you're 50, earning $150,000, and expect to live on $50,000 in retirement, traditional likely wins—you save taxes at 24% now and pay at 12% later.
The problem: you cannot predict tax rates 30 years from now. Congress could raise or lower rates. Your income could shift. Rather than trying to forecast, many people use this rule of thumb: if you're uncertain, Roth is safer because you lock in today's tax rate and never owe again. Traditional is better if you're confident you'll be in a lower bracket later.
Contribution limits and catch-up rules
For 2024, you can contribute up to $7,000 to an IRA (traditional, Roth, or a combination) if you're under 50. If you're 50 or older, you can add an extra $1,000 catch-up contribution, for a total of $8,000. These limits reset each year and are set by the IRS.
The limit applies across all your IRAs combined. If you contribute $4,000 to a traditional IRA, you can only add $3,000 to a Roth that same year. You cannot split the limit between the two to contribute the full amount to each.
Your employer retirement plan (401k, 403b, or similar) has its own separate limit, so those contributions do not count against your IRA limit.
Income limits and the backdoor Roth option
Roth contributions phase out at higher incomes. For 2024, single filers cannot contribute the full amount if they earn above roughly $146,000, and the ability to contribute completely disappears around $161,000. For married couples filing jointly, the phase-out starts around $230,000 and ends around $240,000. These numbers change yearly.
If you earn above the limit, you have two options. First, you can contribute to a traditional IRA instead—there are no income limits for contributions, only for the tax deduction if you have a workplace plan. Second, you can use a backdoor Roth: contribute to a traditional IRA (non-deductible), then immediately convert it to a Roth. This works regardless of income, though it involves filing Form 8606 with your taxes and can trigger taxes if you have other pre-tax IRA balances.
Comparing the two side by side
| Feature | Traditional IRA | Roth IRA |
|---|---|---|
| Tax deduction now | Yes (with limits if you have a workplace plan) | No |
| Tax on withdrawals in retirement | Yes, on all withdrawals | No, withdrawals are tax-free |
| Income limits for contributions | None | Yes, phases out at higher incomes |
| Required withdrawals at age 73 | Yes | No |
| Can withdraw contributions early | Penalty applies | Penalty-free (growth is restricted) |
| 2024 contribution limit | $7,000 ($8,000 if 50+) | $7,000 ($8,000 if 50+) |
A practical way to decide right now
Start with your current tax bracket. Find your filing status and income on the IRS tax tables for this year. If you're in the 22% bracket or lower, Roth usually makes more sense—you're paying a relatively low rate now. If you're in the 24% bracket or higher, traditional often wins—you save more in taxes today.
Next, ask yourself: do you expect to earn more or less in retirement? If more, Roth. If less, traditional. If you genuinely do not know, Roth is the safer bet because you eliminate future tax uncertainty.
Finally, check whether you can even contribute to Roth. If you earn above the income limit, traditional or backdoor Roth are your options. If you're below the limit, either works, and you can split your contribution between both if you want diversification.
Frequently Asked Questions
Can I contribute to both a traditional and Roth IRA in the same year?
Yes, but your total contributions to all IRAs combined cannot exceed the annual limit ($7,000 for 2024 if you're under 50). If you put $3,000 in a traditional IRA, you can only add $4,000 to a Roth that year. The limit is shared across all IRAs you own.
What happens if I withdraw money from a Roth IRA before retirement?
You can withdraw your contributions penalty-free at any time. Withdrawals of growth (earnings) before age 59½ are subject to taxes and a 10% penalty, with some exceptions like first-time home purchases (up to $10,000 lifetime). Traditional IRA withdrawals before 59½ are taxed as income plus a 10% penalty, with similar exceptions.
Do I have to pay taxes on Roth conversions?
Yes. When you convert a traditional IRA to a Roth, you owe income tax on the amount converted in that tax year. This is why backdoor Roth conversions can be expensive if you have large pre-tax IRA balances—you'd owe taxes on the entire balance, not just the conversion. Consult a tax professional before converting.
What if my income changes after I contribute to a Roth?
Your contribution is locked in once you make it. If you earn above the limit later in the year, you cannot contribute that year, but contributions you already made are not reversed. However, if you contributed and then discovered you were ineligible, you can request a return of the excess contribution from your IRA provider.
Which IRA grows faster, traditional or Roth?
The growth rate depends on what you invest in, not the account type. Both traditional and Roth IRAs can hold the same investments—stocks, bonds, mutual funds, etc. The difference is the tax treatment, not the growth potential. A Roth grows tax-free; a traditional grows tax-deferred.