Choose based on your tax bracket now versus later
The core difference is simple: a traditional IRA lets you deduct contributions from your taxes this year, but you pay income tax on withdrawals in retirement. A Roth IRA takes after-tax money now, but withdrawals in retirement are tax-free. Which one makes sense depends on whether you expect to be in a higher or lower tax bracket when you retire.
If you are in a high tax bracket right now and expect to be in a lower one in retirement, a traditional IRA saves you more money overall. If you are in a lower bracket now and expect to be in a higher one later—or if you simply want to lock in your current tax rate—a Roth IRA is the better choice. The catch is that nobody knows future tax rates with certainty, so this decision often comes down to your best guess about your own income trajectory.
Key Takeaways
- Traditional IRA contributions reduce your taxable income this year, but you owe income tax on every dollar you withdraw in retirement.
- Roth IRA contributions are made with after-tax money, but may have access to withdrawals in retirement are completely tax-free.
- You can only contribute to a Roth IRA if your income is below a certain threshold, which changes each year; traditional IRAs have no income limit.
- Traditional IRAs require you to start taking withdrawals at age 73, while Roth IRAs have no required withdrawals during your lifetime.
- Many people benefit from splitting contributions between both types, especially if their income or tax situation is likely to change.
How the tax deduction works in a traditional IRA
When you contribute to a traditional IRA, you can deduct that amount from your taxable income in the year you make the contribution—but only if you meet certain conditions. If you have a workplace retirement plan like a 401(k) and your income exceeds a threshold set by the IRS each year, your deduction phases out or disappears entirely. If you do not have a workplace plan, you can usually deduct the full amount regardless of income.
The money grows tax-free inside the account. When you withdraw it in retirement, every dollar is taxed as ordinary income at whatever your tax rate is that year. If you withdraw before age 59½, you typically owe a 10% penalty plus income tax on the amount withdrawn, with some exceptions for hardship situations.
How the tax-free growth works in a Roth IRA
A Roth IRA takes the opposite approach. You contribute money that has already been taxed, so you get no deduction this year. But the money grows tax-free, and if you follow the rules, you withdraw it completely tax-free in retirement. You also pay no tax on the earnings—only on contributions, which you can withdraw anytime without penalty.
The income limits are the real constraint. For 2024, you cannot contribute to a Roth IRA if your modified adjusted gross income exceeds $161,000 (single) or $240,000 (married filing jointly); these thresholds change annually. If your income is above the limit, you have other options like a backdoor Roth conversion, but that requires careful planning to avoid tax complications.
Required withdrawals and flexibility in retirement
A traditional IRA forces you to start withdrawals at age 73. The IRS calculates a minimum amount based on your age and account balance, and you must withdraw at least that much each year or face a 25% penalty on the shortfall (reduced to 10% if you correct it quickly). This matters if you do not need the money yet, because you are forced to take taxable income whether you want it or not.
A Roth IRA has no required withdrawals during your lifetime. You can let it sit and grow for as long as you live, then leave it to heirs tax-free. This makes a Roth especially valuable if you expect to have other income sources in retirement and do not need to tap your IRA right away.
Income limits and who can actually use each type
Traditional IRAs have no income limit for contributions, but the tax deduction phases out if you earn above a certain amount and have a workplace retirement plan. The phase-out range for 2024 is $77,000 to $87,000 for single filers and $123,000 to $143,000 for married couples filing jointly. If you exceed the upper limit, you can still contribute, but you get no deduction.
Roth IRAs have a hard income ceiling. Once your income exceeds the limit, you cannot contribute directly. However, you can use a backdoor Roth strategy: contribute to a traditional IRA with no deduction, then immediately convert it to a Roth. This works only if you have no other pre-tax IRA balances, because the IRS taxes the conversion based on your total IRA holdings. If you have existing traditional IRA money, a backdoor Roth becomes complicated and expensive.
When a traditional IRA makes more sense
Choose a traditional IRA if you are in a high tax bracket right now and expect to be in a lower one in retirement. A high earner who will have less income after leaving the workforce, or someone who plans to retire abroad in a lower-tax country, benefits from the immediate deduction. You also want a traditional IRA if your income is too high for a Roth and a backdoor conversion is not practical.
A traditional IRA also works well if you need the tax deduction this year to reduce your taxable income. If you are self-employed or have a side business, a traditional IRA contribution can lower your self-employment tax liability, which is a real cash benefit.
When a Roth IRA makes more sense
Choose a Roth IRA if you are in a lower tax bracket now and expect to earn more in retirement, or if you simply want to lock in your current tax rate and avoid guessing about future rates. Young workers almost always benefit from a Roth because they have decades of tax-free growth ahead and are likely to earn more later in their careers.
A Roth is also the right choice if you want maximum flexibility in retirement. No required withdrawals means you can leave the money untouched if you do not need it, and you can withdraw contributions (not earnings) anytime without penalty. If you expect to leave money to heirs, a Roth passes to them tax-free, which is a significant advantage over a traditional IRA.
The case for splitting between both types
You do not have to choose one or the other. Many people contribute to both a traditional IRA and a Roth IRA in the same year, as long as their total contributions do not exceed the annual limit ($7,000 for 2024, or $8,000 if you are 50 or older). This approach hedges your bet on future tax rates and gives you flexibility in retirement.
For example, you might put money into a traditional IRA to get a deduction this year, then contribute to a Roth with any remaining savings. In retirement, you can withdraw from whichever account makes sense based on your income that year. If you have a low-income year, you might withdraw from the traditional IRA to minimize taxes. If you have a high-income year, you can draw from the Roth instead.
Frequently Asked Questions
Can I convert a traditional IRA to a Roth later?
Yes. You can convert all or part of a traditional IRA to a Roth at any time, but you owe income tax on the pre-tax money you convert. This makes sense if you expect tax rates to rise, or if you have a low-income year and want to convert at a lower rate. Plan this carefully, because the conversion counts as income and can push you into a higher bracket.
What happens to my IRA if I die?
Your heirs inherit the account, but the tax treatment differs. Traditional IRA heirs owe income tax on withdrawals. Roth IRA heirs withdraw tax-free, which is a major advantage. Either way, they must empty the account within 10 years under current rules, though some exceptions apply for spouses.
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). You can split the money however you want between them.
What if my employer offers a 401(k)?
You can have both a 401(k) and an IRA. However, if you have a workplace plan, the traditional IRA deduction phases out at higher income levels. A Roth IRA has its own income limits that are separate from your 401(k). Many people max out their 401(k) first for the employer match, then use an IRA for additional retirement savings.
Is there a penalty for withdrawing from a Roth early?
You can withdraw your contributions anytime without penalty. Earnings withdrawn before age 59½ are subject to tax and a 10% penalty, unless you meet an exception like a first-time home purchase (up to $10,000 lifetime) or a may have access to hardship. Contributions and earnings are tracked separately, so know which you are withdrawing.