The core difference: when you pay taxes

A traditional IRA lets you put money in before you pay income tax on it. You get a tax deduction in the year you contribute. Then when you withdraw the money in retirement, you pay income tax on what you take out.

A Roth IRA works the opposite way. You contribute money that you have already paid income tax on. The money grows tax-free, and when you withdraw it in retirement, you owe no income tax on any of it—not on what you put in, and not on the growth.

That is the whole structural difference. Everything else flows from that one choice: pay taxes now or pay taxes later.

Key Takeaways

  • Traditional IRA contributions may reduce your taxable income in the year you contribute, but withdrawals in retirement are taxed as ordinary income.
  • Roth IRA contributions are made with after-tax dollars, but may have access to withdrawals in retirement are completely tax-free.
  • Roth IRAs have income limits that may prevent high earners from contributing directly, while traditional IRAs do not.
  • Traditional IRAs require you to start taking withdrawals at age 73, but Roth IRAs have no withdrawal requirement during your lifetime.
  • The right choice depends on whether you expect to be in a higher or lower tax bracket in retirement than you are now.

Income limits and who can contribute

Anyone with earned income can open and contribute to a traditional IRA, regardless of how much money they make. There are no income limits.

Roth IRAs have income limits that change each year. If your income is above a certain threshold, you cannot contribute directly to a Roth. The threshold depends on your filing status and varies by year. For 2024, for example, the limit phases out for single filers earning over $146,000 and married filers earning over $230,000, but these numbers shift annually. You can check the current limits on the IRS website.

If your income is too high for a Roth, some people use a workaround called a "backdoor Roth," where they contribute to a traditional IRA and then convert it to a Roth. This is legal but has tax complications if you already have other traditional IRAs.

Tax deductions and how they work now

When you contribute to a traditional IRA, you may be able to deduct the full amount from your taxable income in that year—but only if you meet certain conditions. If you have a workplace retirement plan like a 401(k) and your income is above a threshold, your deduction phases out or disappears entirely. If you do not have a workplace plan, you can usually deduct the full amount.

The deduction reduces the income you report to the IRS, which lowers your tax bill that year. This makes a traditional IRA appealing if you want to reduce your taxes right now.

Roth contributions give you no tax deduction. You contribute money you have already paid tax on. This means your tax bill does not go down in the year you contribute.

Growth and withdrawals in retirement

Both account types let your money grow tax-free while it sits in the account. The difference shows up when you withdraw.

With a traditional IRA, every dollar you withdraw is taxed as ordinary income. If you contributed $5,000 and it grew to $12,000, you pay income tax on the full $12,000 when you withdraw it. The growth and the original contribution are both taxable.

With a Roth IRA, you withdraw money tax-free as long as you meet two conditions: the account has been open for at least five years, and you are at least 59½ years old (or meet another exception like disability). If both conditions are met, you owe no tax on any of it—not the $5,000 you put in, and not the $7,000 in growth.

Required withdrawals and flexibility

Traditional IRAs require you to start taking withdrawals at age 73. The IRS calculates a minimum amount you must withdraw each year based on your age and account balance. These are called required minimum distributions, or RMDs. If you do not take them, you face a penalty.

Roth IRAs have no required minimum distributions while you are alive. You can leave the money untouched for as long as you want, which makes them useful if you do not need the money in retirement or want to leave it to heirs.

This difference matters if you plan to work past 73 or do not need retirement income right away. A Roth gives you more control over when to take money out.

Early withdrawals and exceptions

If you need money before age 59½, both account types penalize you—usually a 10% penalty plus income tax on the amount withdrawn. But the rules are different.

With a traditional IRA, almost any early withdrawal triggers the penalty and tax. There are narrow exceptions for things like medical expenses or a first home purchase, but they are limited.

With a Roth IRA, you can withdraw the money you contributed (not the growth) at any time without penalty or tax. You only pay the penalty if you withdraw the growth early. This makes a Roth more flexible if you think you might need access to your own contributions before retirement.

Which one makes sense for you

Choose a traditional IRA if you want to reduce your taxes this year and expect to be in a lower tax bracket in retirement. This often applies to people early in their careers or those with high current income.

Choose a Roth IRA if you expect to be in a higher tax bracket in retirement, want tax-free withdrawals, or value the flexibility of no required withdrawals. Roth IRAs also make sense if you are young and have decades for the money to grow tax-free, or if you want to leave tax-assistance programs to heirs.

Some people use both. You can contribute to a traditional IRA and a Roth IRA in the same year, as long as your combined contributions do not exceed the annual limit (which is $7,000 for 2024 if you are under 50, or $8,000 if you are 50 or older).

Frequently Asked Questions

Can I convert a traditional IRA to a Roth?

Yes. You can convert all or part of a traditional IRA to a Roth at any time. You will owe income tax on the amount converted in that tax year, but once it is in the Roth, future growth is tax-free. This is how the backdoor Roth strategy works for high earners.

What happens to my IRA if I die?

Your heirs inherit the account, but the tax treatment differs. With a traditional IRA, heirs owe income tax on withdrawals. With a Roth, heirs can withdraw tax-free (though they must empty the account within ten years under current rules). This makes Roths valuable for leaving money to family.

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

Yes, but your total contributions to both accounts combined cannot exceed the annual limit. If you contribute $4,000 to a traditional IRA, you can only contribute $3,000 to a Roth that year (assuming the $7,000 limit for 2024).

Do I pay taxes twice with a Roth—once when I earn the money and again when I contribute?

No. You pay income tax on your salary once, when you earn it. The money left after taxes is what you contribute to the Roth. You do not pay tax again on that contribution.

Which account grows faster, traditional or Roth?

They grow at the same rate inside the account. The difference is what you keep after taxes. A Roth may leave you with more spendable money in retirement because withdrawals are tax-free, but that depends on whether tax rates are higher or lower when you retire.