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Both account types let you invest money for retirement with tax advantages, but they apply that advantage at opposite ends of the timeline. A traditional IRA contribution can be tax-deductible in the year you make it, lowering your taxable income now, with withdrawals in retirement taxed as ordinary income. A Roth IRA contribution offers no upfront deduction, since it’s made with money you’ve already paid tax on, but qualified withdrawals in retirement, including all investment growth, come out completely tax-free.

Neither account avoids taxes altogether; each one simply picks a different point to apply them. The traditional IRA taxes the money going in and the growth coming out. The Roth IRA taxes the money going in, but leaves the growth entirely untaxed.

For 2026, the combined annual contribution limit across all your IRAs, traditional and Roth together, is $7,500. Savers age 50 and older can contribute an additional $1,100 catch-up amount, for a total of $8,600. You can split contributions between a traditional and a Roth IRA in the same year in any combination you choose, as long as the combined total doesn’t exceed this limit, and you can’t contribute more than your actual earned income for the year.

These are the same annual limits regardless of how many separate IRA accounts you hold across different financial institutions; the cap applies to the total across all of them combined, not to each account individually. Contributing beyond the limit, even accidentally by spreading contributions across multiple accounts without tracking the total, can trigger a 6% excise tax on the excess amount for each year it isn’t corrected.

Traditional IRAs have no income limit on who can contribute, though the tax deduction itself can phase out at higher incomes if you’re also covered by a workplace retirement plan. Roth IRAs work differently: your ability to contribute directly phases out entirely above a certain income level. For 2026, the phase-out range is $153,000 to $168,000 in modified adjusted gross income for single filers, and $242,000 to $252,000 for married couples filing jointly. Earn above the top of that range, and you can’t contribute directly to a Roth IRA at all that year, regardless of how much you’d like to.

This income limit is the single most common reason higher earners end up defaulting to a traditional IRA, or exploring a “backdoor Roth” strategy, contributing to a traditional IRA and then converting it to a Roth, which sidesteps the direct income limit through a different, IRS-sanctioned mechanism. The conversion itself is generally a taxable event on any pretax amount converted, so the strategy works best when the traditional IRA involved has little or no existing pretax balance to complicate the tax calculation.

The traditional-versus-Roth decision ultimately comes down to a comparison between your current tax bracket and your expected tax bracket in retirement. If you expect to be in a lower bracket once you’re retired, perhaps because your income naturally drops without a salary, the traditional IRA’s upfront deduction is generally more valuable, since you’re deferring tax from a higher-bracket year into a lower-bracket one.

If you expect to be in the same bracket or a higher one in retirement, which can happen if your investments grow substantially or if you expect future tax rates to rise generally, the Roth IRA’s tax-free growth becomes more attractive, since you’re locking in today’s rate on money that might otherwise be taxed more heavily later. Nobody can know their future tax bracket with certainty, which is exactly why this remains a genuine judgment call rather than a question with one universally correct answer.

Roth IRAs offer more withdrawal flexibility than many people realize: contributions, though not earnings, can generally be withdrawn at any time, for any reason, without tax or penalty, since that money was already taxed before it went in. Earnings withdrawn before age 59½ and before the account has been open five years typically face both tax and a 10% penalty, with some exceptions.

Traditional IRAs are stricter across the board, since none of the money has been taxed yet. Withdrawals before 59½ generally trigger both ordinary income tax and a 10% early withdrawal penalty, again with certain exceptions. Traditional IRAs also require you to start taking required minimum distributions at a certain age, whether or not you actually need the money that year, while Roth IRAs carry no such requirement during the original owner’s lifetime.

These rules mean the two accounts aren’t just different in how they’re taxed; they behave differently as financial safety nets too. A Roth IRA’s ability to access contributions penalty-free gives it some flexibility as a backup source of funds in a genuine emergency, something a traditional IRA generally can’t offer without triggering both tax and penalty on the full withdrawn amount.

Splitting contributions between both account types, or holding a traditional 401(k) at work alongside a Roth IRA on the side, is a common way to hedge against genuine uncertainty about future tax rates. Having both taxable-later and tax-free-later money available in retirement gives you more flexibility to manage your taxable income each year by choosing which account to draw from.

This flexibility can matter more than it sounds like in the abstract. A retiree with only traditional accounts has every withdrawal added to taxable income, which can push them into a higher bracket or affect other income-based calculations, like how much of their Social Security benefit is taxed. Having a pool of tax-free Roth money to draw from in high-income years, alongside traditional funds to draw from in lower-income years, gives retirees a lever to manage their tax situation that a single account type simply doesn’t provide.

Whichever account type you lean toward, the growth math itself works the same way. Our Compound Interest Calculator can help you see how a $7,500 annual contribution, or any amount you choose, could grow over your own time horizon.

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