The short version
Both Roth and Traditional IRAs are tax-advantaged retirement accounts. The core difference is when you pay income tax:
- Traditional IRA: contributions may be tax-deductible now (lowering this year's tax bill), but withdrawals in retirement are taxed as ordinary income.
- Roth IRA: contributions are made with after-tax money (no deduction now), but qualified withdrawals in retirement are completely tax-free.
Both grow tax-deferred in the meantime. The decision hinges on one question: do you expect to be in a higher or lower tax bracket in retirement?
2026 contribution limits
Both account types share the same limit. For 2026:
- $7,500 annual contribution limit.
- $1,100 catch-up if you're age 50 or older.
- $8,600 total for those eligible for catch-up.
The limit is shared across all your IRAs combined — you can't put $7,500 in a Roth and another $7,500 in a Traditional.
When Roth usually wins
- You expect to be in a higher tax bracket in retirement than now (common for early-career earners).
- You have many years for tax-free growth to compound.
- You want to avoid required minimum distributions (RMDs) — Roth IRAs don't have them for the original owner.
- You want tax diversification in retirement alongside a traditional 401(k).
When Traditional usually wins
- You're in a high tax bracket now and expect a lower one in retirement — the upfront deduction is worth more at today's higher rate.
- You expect lower income in retirement (smaller withdrawals, partial retirement, moving to a no-tax state).
- You need the current-year tax break to make contributing affordable.
Eligibility catches to know about
This is where reality gets messier than the simple "now vs. later" framing:
- Roth income limits: high earners may be phased out of direct Roth contributions. Check the current year's IRS phaseout ranges.
- Traditional deductibility: if you (or your spouse) are covered by a workplace plan, deductibility phases out above certain income levels. Nondeductible contributions are still allowed but lose the main Traditional advantage.
- Backdoor Roth: some high earners use a two-step contribution + conversion; this has tax nuances and is worth understanding before attempting.
Other factors beyond the tax rate guess
- State taxes: if you'll retire in a state with no income tax, Traditional's later taxation may hurt less than expected.
- RMDs: Traditional forces withdrawals starting at a certain age; Roth does not. RMDs can push you into higher brackets or affect Medicare premiums.
- What you'd do with the deduction: if you'd invest the tax savings from a Traditional contribution, the math shifts in its favor.
- Flexibility: Roth contributions (not earnings) can be withdrawn penalty-free in some cases, offering more early-access flexibility.
A common compromise: hold both
Since nobody can predict future tax rates with confidence, many people hold both account types — a strategy called tax diversification. In retirement you can withdraw from Traditional or Roth to manage your taxable income year by year. If you have a traditional 401(k) at work, a Roth IRA pairs naturally with it.
Use the calculator
Model the after-tax outcomes of each choice with the Roth vs Traditional IRA Calculator. Also see workplace plan limits in our 2026 401(k) limits guide.
This guide is educational only. Eligibility, deductibility, and phaseouts depend on income, filing status, and workplace coverage, all of which change. It is not financial, investment, tax, legal, accounting, or retirement advice. Confirm current IRS rules before acting. See our disclaimer.