The core difference: when you pay taxes

A traditional IRA lets you deduct contributions from your income taxes in the year you make them, but you pay income tax on the money when you withdraw it in retirement. A Roth IRA takes the opposite approach: you contribute after-tax dollars (no deduction now), but withdrawals in retirement are tax-free.

Which one saves you more money depends on whether your tax rate is higher now or will be higher in retirement. If you expect to be in a lower tax bracket when you retire, a traditional IRA usually makes sense. If you expect to be in the same bracket or a higher one, a Roth IRA often wins.

Key Takeaways

  • Traditional IRA contributions may reduce your taxable income this year, but you owe income tax on withdrawals in retirement.
  • Roth IRA contributions use after-tax money, but may have access to withdrawals in retirement are completely tax-free.
  • Traditional IRAs require you to start taking withdrawals at age 73, while Roth IRAs have no withdrawal requirement during your lifetime.
  • Roth IRAs let you withdraw contributions (not earnings) at any time without penalty, while traditional IRAs charge a 10% penalty on early withdrawals before age 59½.
  • Income limits restrict who can contribute to a Roth IRA, but traditional IRA contributions are available to anyone with earned income.

Tax deductions and income limits

With a traditional IRA, your contribution may be fully deductible, partially deductible, or not deductible at all — it depends on your income and whether you or your spouse have access to a workplace retirement plan like a 401(k). If neither of you has a workplace plan, you can deduct the full amount. If you do have a workplace plan, the deduction phases out at higher income levels. The income thresholds change each year.

Roth IRAs have income limits that prevent higher earners from contributing directly. For 2024, the ability to contribute phases out starting at $146,000 for single filers and $230,000 for married couples filing jointly (these numbers shift annually). There is no income limit for traditional IRAs, though the deductibility of your contribution may be limited.

Withdrawal rules and penalties

Traditional IRA withdrawals before age 59½ are subject to a 10% early withdrawal penalty, plus you owe income tax on the amount withdrawn. There are narrow exceptions: withdrawals for a first home purchase (up to $10,000 lifetime), medical expenses above a certain threshold, health insurance premiums while unemployed, and a few others. Most early withdrawals trigger both the penalty and the tax bill.

Roth IRAs are more flexible. You can withdraw your contributions (the money you put in) at any time, tax-free and penalty-free. You cannot withdraw earnings without penalty until age 59½ unless an exception applies. This distinction matters: if you contributed $5,000 and it grew to $7,000, you can pull out the $5,000 anytime, but the $2,000 in gains stays locked until 59½.

Required minimum distributions

At age 73, you must start taking required minimum distributions (RMDs) from a traditional IRA. The IRS calculates the minimum amount based on your age and account balance, and you owe income tax on whatever you withdraw. If you do not take the full RMD, you face a 25% penalty on the shortfall (reduced to 10% under certain conditions).

Roth IRAs have no RMD requirement during your lifetime. This makes them useful for people who do not need the money in retirement and want to leave the account to heirs. Your beneficiaries will eventually have to withdraw the funds, but you do not.

Contribution limits and catch-up contributions

Both traditional and Roth IRAs share the same annual contribution limit. For 2024, you can contribute up to $7,000 per year (or $8,000 if you are age 50 or older, using the catch-up provision). These limits apply to your combined contributions across all IRAs you own — you cannot put $7,000 in a traditional IRA and another $7,000 in a Roth in the same year.

The contribution limit is based on your earned income. You cannot contribute more than you earned that year, and if you are married and one spouse has no income, you can use a spousal IRA to fund an account in their name using the working spouse's income.

Inherited IRAs and beneficiary rules

When you leave a traditional IRA to a beneficiary, they inherit the account but must pay income tax on withdrawals. Non-spouse beneficiaries generally must empty the account within 10 years under current rules, though the withdrawal schedule depends on when the original account owner died.

Roth IRAs pass to beneficiaries tax-free, which is a significant advantage. Beneficiaries still must withdraw the funds (usually within 10 years), but those withdrawals are not taxable. This makes Roth IRAs a powerful tool for leaving money to heirs.

Which account type fits your situation

Choose a traditional IRA if you want to reduce your taxable income this year, expect to be in a lower tax bracket in retirement, or earn too much to contribute to a Roth. It is also the right choice if you need the tax deduction now more than you need flexibility later.

Choose a Roth IRA if you expect your income or tax rates to be higher in retirement, want tax-free withdrawals, value the flexibility to access contributions early, or want to leave tax-assistance programs to heirs. Roth accounts also make sense if you are young and have decades for the account to grow tax-free.

Some people use both: a traditional IRA for the immediate tax break and a Roth for tax-free growth. There is no rule against owning both types at the same time, as long as your combined contributions do not exceed the annual limit.

Frequently Asked Questions

Can I convert a traditional IRA to a Roth IRA?

Yes. A Roth conversion means moving money from a traditional IRA into a Roth IRA. You pay income tax on the amount converted in that year, but the money then grows tax-free in the Roth. There is no income limit on conversions, though they can push you into a higher tax bracket. Many people convert in years when their income is lower.

What happens if I withdraw from a Roth IRA before age 59½?

You can withdraw contributions anytime without penalty or tax. Withdrawals of earnings before 59½ are subject to a 10% penalty and income tax, unless you meet an exception (disability, first-time home purchase up to $10,000, or a few others). The key is knowing how much of your withdrawal is contributions versus earnings.

Do I have to have earned income to open an IRA?

Yes, for both types. You must have earned income (wages, self-employment income) in the year you contribute. A spouse with no income can contribute to a spousal IRA if the working spouse has enough earned income to cover both contributions.

What if my income is too high for a Roth IRA?

You cannot contribute directly to a Roth if your income exceeds the limit. However, you can use a backdoor Roth strategy: contribute to a traditional IRA (which has no income limit), then convert it to a Roth. This works if you have no other pre-tax IRA balances. Consult a tax professional before attempting this, as the rules are complex.

Which account grows faster, traditional or Roth?

The growth rate is the same — it depends on what you invest in, not the account type. The difference is the tax treatment. A Roth grows tax-free and you keep all the gains. A traditional IRA grows tax-deferred, but you owe tax on the full amount (contributions plus gains) when you withdraw.