Roth IRA vs Traditional IRA

Roth IRAs and Traditional IRAs are individual retirement accounts under U.S. tax law. Both can hold investments you choose at a bank, credit union, or brokerage. Both share one annual contribution cap. The core difference is when you pay federal income tax: Traditional IRAs often aim for a deduction now and taxation later; Roth IRAs take after-tax contributions now and can allow qualified tax-free withdrawals later. Neither account guarantees investment results.

Choosing between them is a tax-timing and access decision, not a hunt for the account that “performs better.” The same fund can sit in either wrapper. What changes is the IRS rule set: deductibility, Roth eligibility, early-withdrawal treatment of earnings, and required minimum distributions for the original owner. Limits below are for 2026 as announced by the IRS and will change in later years.

Same contribution vehicle, different tax timing

You generally need eligible compensation—wages or self-employment income, among IRS categories—to contribute. A spousal IRA can cover a spouse with little compensation if you file jointly and have enough combined compensation. You cannot contribute more than eligible compensation for the year.

For 2026, the IRA contribution limit is $7,500. If you are age 50 or older, a catch-up of $1,100 is allowed, for $8,600 total. That cap is combined across all of your Traditional and Roth IRAs. Contributing $4,000 to a Roth and $4,000 to a Traditional IRA in 2026 would exceed the limit for someone under 50.

Deadlines follow the tax year. You typically have until the tax-filing deadline in the following year, not including extensions, to make a prior-year IRA contribution. Tell the custodian which tax year the deposit is for.

Traditional IRA: deduction now, tax later

A Traditional IRA contribution may be deductible on your federal return. If it is, you reduce taxable income this year, and later withdrawals of deductible contributions and earnings are generally taxed as ordinary income. If you or your spouse are covered by a workplace retirement plan, the deduction can phase out as modified adjusted gross income (MAGI) rises.

For 2026, if you are single and covered by a workplace plan, the deduction phases out between $81,000 and $91,000 of MAGI. If you are married filing jointly and the spouse making the contribution is covered at work, the phase-out is $129,000 to $149,000. If you are not covered but your spouse is, the joint phase-out is $242,000 to $252,000. If neither spouse is covered by a workplace plan, these deduction phase-outs do not apply. Married filing separately has a tight $0 to $10,000 range when coverage rules apply.

You can still contribute to a Traditional IRA without a deduction. Those nondeductible contributions create basis. Form 8606 exists so the IRS can distinguish after-tax principal from pre-tax money at withdrawal. Skipping that form is how people accidentally pay tax twice. Earnings on nondeductible amounts are still generally taxable when withdrawn.

Workplace coverage is a defined term

“Covered by a retirement plan” is not the same as “eligible to join someday.” It usually means you are an active participant for the year, shown on Form W-2. If you are unsure, the W-2 checkbox and your plan administrator matter more than a guess.

Roth IRA: after-tax in, qualified withdrawals later

Roth contributions are not deductible. Qualified distributions—generally after age 59½ and after a five-year clock that starts with your first Roth IRA contribution, with other qualifying events such as death or disability—can be tax-free, including earnings. Contribution principal can generally be withdrawn at any time without federal income tax, because you already paid tax on that money. Earnings taken too early can be taxable and may face a 10% additional tax, with exceptions.

Roth eligibility phases out with MAGI even though the contribution is after-tax. For 2026, single and head-of-household filers phase out between $153,000 and $168,000. Married filing jointly phases out between $242,000 and $252,000. Full contributions are available below the bottom of the range; no regular Roth contribution is allowed above the top. Married filing separately who lived with a spouse uses a $0 to $10,000 range.

High earners sometimes use a “backdoor” Roth: a nondeductible Traditional contribution followed by a conversion. That can work cleanly if you have no other Traditional IRA balances. If you do, the pro-rata rule can make part of the conversion taxable. This guide does not treat the steps as a loophole to chase without tax advice.

Income limits, coordination, and the 401(k)

IRA limits are independent of 401(k) elective deferral limits. You can, if eligible, max a 401(k) and still contribute to an IRA, subject to compensation and MAGI rules. A workplace plan can block a Traditional deduction; income can separately block a Roth contribution. Those are different tests. The Saver’s Credit may apply at lower and moderate incomes; see current Form 8880 instructions. State tax may not mirror federal treatment.

Withdrawals, RMDs, and early access

Traditional IRAs generally require the original owner to take required minimum distributions after the applicable RMD age (73 for many current retirees, with a later age scheduled under SECURE 2.0 for younger cohorts). Roth IRAs do not require lifetime RMDs for the original owner. Beneficiaries of either type face distribution rules that depend on their status and the year of death. Those inherited-IRA rules are detailed and have changed; do not assume a stretch over your full life expectancy without checking current law.

Early withdrawals from a Traditional IRA before 59½ are often subject to ordinary income tax plus a 10% additional tax, with a list of exceptions such as certain medical costs, first-time homebuyer amounts up to a lifetime cap, substantially equal periodic payments, and others. Roth ordering rules treat regular contributions as coming out first, which is more flexible for access to principal. Conversions have their own five-year clocks for the 10% additional tax on converted amounts. Exceptions exist; they are statutory, not courtesy policies of your broker.

• Confirm MAGI and filing status before you assume you can deduct a Traditional contribution or make a Roth contribution.
• Track basis on Form 8606 whenever a Traditional contribution is nondeductible or you convert.
• Do not exceed the combined IRA dollar cap across accounts and custodians.
• Treat a conversion as a taxable event for pre-tax amounts, payable with money outside the IRA if you can.
• Recheck RMD and beneficiary rules when you approach the RMD age or inherit an account.

Tax brackets, MAGI, and investment returns are unknown. A Roth versus Traditional comparison that assumes one future tax rate is an illustration. It is not a prediction of Congress, your career, or market performance.

A labeled tax-timing example

This example is hypothetical. It holds investment results equal so the only moving piece is tax timing. The return figure is an assumption, not a forecast.

Suppose Alex, age 35, contributes $7,500 for 2026 and will not contribute again in this simplified story. Assume the money is invested and the account grows at a constant 6% annual rate for 30 years. That 6% is an illustration only. Under that assumption, $7,500 grows to about $43,100 before considering taxes (future value of a lump sum: 7,500 × 1.06^30).

If the contribution is deductible Traditional, Alex might save current tax. At an assumed 22% federal marginal rate, the first-year tax reduction would be 0.22 × $7,500 = $1,650 in this example. If Alex later withdraws the entire Traditional balance in a year with a 22% rate, tax on about $43,100 would be about $9,480, leaving about $33,620 after federal tax. If the later rate is 32%, tax would be higher; if it is 12%, tax would be lower. State tax is ignored here.

If the contribution is Roth, Alex already paid tax on the wages used to contribute. There is no $1,650 deduction. If the later withdrawal is qualified, the entire $43,100 could come out without federal income tax under these assumptions. Whether Alex is ahead depends on investing that $1,650 tax savings and on actual tax rates at both ends.

If Alex’s current rate is 12% and a future rate is expected to be higher, Roth looks better in this sketch. If the current rate is high and a future rate is expected to be lower, a deductible Traditional contribution can look better. Those expected rates are guesses. Social Security taxation, Medicare IRMAA, and RMDs can change the effective rate in retirement.

How to think about the choice

Start with eligibility. If MAGI blocks a Roth contribution and a Traditional deduction, the menu is nondeductible Traditional, a carefully handled conversion, more 401(k), or taxable investing. If you can use either IRA, ask whether you value a deduction this year more than tax-free qualified withdrawals later. Some households use both over a career: pre-tax in high-earning years, Roth in lower-income years. That is a heuristic, not a theorem. Switching wrappers does not make a stock fund safer.

Limits of this comparison

This guide cannot compute your MAGI, state tax, or an optimal conversion amount. It cannot promise that a Roth will stay tax-free under future law, or that a Traditional deduction will save more than it costs later.

Calculators that grow a balance at a constant rate hide volatility and fees. Test contribution patterns under more than one assumed return, then apply tax with a range of future rates. For large conversions, use current IRS publications and a qualified tax professional. Compare tax timing and access rules, not a claim that one IRA type earns higher market returns.