Roth is better if you expect to be in a higher tax bracket in retirement than you are now

A Roth IRA lets you pay taxes on the money you put in today, then withdraw it tax-free in retirement. A traditional IRA lets you deduct what you put in now, lowering your taxes today, but you pay taxes on withdrawals later. Which one costs you less depends almost entirely on whether your tax rate will be higher or lower when you retire than it is right now.

If you believe your income and tax bracket will climb over the next 20 or 30 years—because you expect promotions, a side business, or investment gains—a Roth locks in today's lower rate. You pay the tax now at 22% (or whatever your bracket is), and when you withdraw in retirement at 32% or 35%, you owe nothing extra. With a traditional IRA, you'd deduct at 22% today but owe 32% or 35% later, which costs you more.

The reverse is also true: if you think you'll earn less in retirement than you do now, a traditional IRA probably saves you money. But most people's incomes rise, and most people underestimate how much they'll have saved by age 65 or 70. That makes Roth the safer bet for many workers in their 20s, 30s, and 40s.

Key Takeaways

  • Roth works better when your tax rate will be higher in retirement than it is now, because you lock in today's lower rate and pay nothing on withdrawals later.
  • Traditional works better when your tax rate will be lower in retirement, because you deduct contributions now at a high rate and pay taxes later at a low rate.
  • Most people's incomes rise over time, which makes Roth the lower-risk choice for younger workers who have decades until retirement.
  • You can hold both a Roth and a traditional IRA at the same time, though your total contributions across both accounts are capped by the IRS each year.
  • If you earn too much to contribute to a Roth directly, a backdoor Roth conversion lets you fund one anyway, though the rules are complex and depend on your other retirement accounts.

Roth is the better choice if you're young and have time to let money grow

The longer your money sits in a Roth, the more the tax advantage compounds. If you put $7,000 into a Roth at age 25 and it grows to $80,000 by age 65, you withdraw all $80,000 tax-free. With a traditional IRA, you'd owe income tax on that entire $80,000 gain when you pull it out.

This is why financial advisors often recommend Roth for people in their 20s and 30s, even if they're in a low tax bracket right now. You're betting that the growth will be substantial and that tax rates will be higher later—both reasonable bets. The younger you are, the more growth you're likely to see, and the more valuable the tax-free withdrawal becomes.

If you're in your 50s or 60s and close to retirement, the math changes. You have less time for growth to compound, so the immediate tax deduction from a traditional IRA may matter more to you than the future tax-free withdrawal from a Roth.

Roth makes sense if you want to avoid required withdrawals in retirement

At age 73, the IRS requires you to start taking money out of a traditional IRA, whether you need it or not. These are called required minimum distributions, or RMDs. The amount is calculated based on your age and account balance, and you owe income tax on every dollar you withdraw.

A Roth IRA has no RMDs during your lifetime. You can leave the money untouched for as long as you live, and your heirs inherit it tax-free. This matters if you don't need the money in retirement, or if you want to pass a larger sum to your children. It also matters if you're worried that forced withdrawals will push you into a higher tax bracket or make your Social Security taxable.

If you think you'll have enough other income in retirement and won't need to touch your IRA, Roth is the clear winner. You avoid the tax hit of RMDs and leave more to your heirs.

Traditional is better if you need to lower your taxable income right now

If you're self-employed, had a big bonus year, or sold an investment at a gain, a traditional IRA contribution can reduce your taxable income for that year. A Roth contribution does not. If you're in a high tax bracket this year and expect to be in a lower one in retirement, the immediate deduction is worth more than the future tax-free withdrawal.

This is especially true if you're trying to stay under an income threshold for a tax credit, a subsidy, or a loan program. Lowering your adjusted gross income (AGI) with a traditional IRA contribution can save you thousands in taxes or unlock a benefit you'd otherwise miss.

The trade-off is that you'll owe taxes on withdrawals later. But if you're confident your tax bracket will drop—because you're planning to retire early, move to a lower-cost state, or live on less—the math favors traditional.

Roth is better if you want flexibility and access to your money

With a Roth IRA, you can withdraw your contributions (not the earnings) at any time, for any reason, without penalty or taxes. If you put in $7,000 and it grows to $9,000, you can pull out the $7,000 contribution whenever you want. With a traditional IRA, any withdrawal before age 59½ is taxed as income and hit with a 10% penalty, with limited exceptions.

This makes Roth a better choice if you're not sure you'll leave the money alone until retirement. It's also useful as a backup emergency fund, though it shouldn't be your primary one. If you lose your job or face a medical crisis, you have access to your contributions without the tax hit.

This flexibility is especially valuable in your 20s and 30s, when life is less predictable and you might need the money for a down payment, a career change, or an unexpected expense.

You can use both at the same time, but there are limits

You don't have to choose one or the other. You can open and fund both a Roth and a traditional IRA in the same year. However, your total contributions across both accounts cannot exceed the annual limit set by the IRS. For 2024, that limit is $7,000 per person per year (or $8,000 if you're 50 or older).

Some people split the difference: they contribute to a traditional IRA to get an immediate tax deduction, then convert part of it to a Roth later when their income is lower. This is called a Roth conversion, and it can be a smart move if you're between jobs, retired early, or had a low-income year.

If you earn too much to contribute to a Roth directly, you can use a backdoor Roth—a legal strategy where you contribute to a traditional IRA and immediately convert it to a Roth. The rules are strict and depend on whether you have other traditional IRAs, so talk to a tax professional before you try this.

The real answer depends on your specific situation, not a general rule

Financial websites often declare one account "better" than the other, but the truth is that Roth and traditional are tools for different situations. Roth is better if you expect higher taxes later, want to avoid RMDs, or value flexibility. Traditional is better if you need a tax deduction now and expect lower taxes in retirement.

The safest approach is to think about your own life: How much longer until you retire? Do you expect your income to rise or fall? Will you need access to the money before retirement? Are you trying to lower your taxes this year? Your answers to these questions matter more than any general rule.

If you're unsure, starting with a Roth in your 20s or 30s is a low-risk choice because you have time to benefit from tax-free growth and you can always adjust later. If you're in a high tax bracket this year and confident your income will drop, traditional makes more sense. And if you're close to retirement, a tax professional can run the numbers for both scenarios and tell you which one costs you less.

Frequently Asked Questions

Can I switch from a traditional IRA to a Roth after I've already contributed?

Yes. You can convert a traditional IRA to a Roth at any time by moving the money and paying income tax on the amount converted. You don't have to convert the whole account—you can convert part of it. This is useful if you have a low-income year and want to lock in a lower tax rate on the conversion.

What happens if I contribute to a Roth but my income goes up and I become ineligible?

If your income exceeds the Roth limit for that year, you can't contribute. If you already did, the IRS treats it as an excess contribution. You can withdraw it and the earnings on it before your tax deadline to avoid penalties, or you can recharacterize it as a traditional IRA contribution instead. The rules are strict, so act quickly if this happens.

If I have a 401(k) at work, should I still open an IRA?

Yes. A 401(k) and an IRA are separate accounts with separate contribution limits. You can max out both in the same year if you have the money. An IRA gives you more control over investments and lower fees than most 401(k)s, so it's worth opening one even if you're already saving in a workplace plan.

Do I pay taxes on Roth earnings when I withdraw them in retirement?

No, as long as you've held the account for at least five years and you're 59½ or older. If you withdraw earnings before then, you owe income tax on the earnings plus a 10% penalty. This is why Roth is best as a long-term account, not a short-term savings tool.

What if I retire early and need to withdraw from my IRA before 59½?

With a Roth, you can withdraw your contributions anytime without penalty. With a traditional IRA, early withdrawals are taxed and penalized unless you meet an exception (disability, medical bills, first-time home purchase, etc.). If early retirement is your plan, Roth is the safer choice because you have penalty-free access to at least part of your money.