Traditional vs. Roth IRA in Retirement: Which Gives You the Better Tax Outcome?

The Two Flavors of IRA Tax Benefits

Individual Retirement Accounts (IRAs) are one of the most accessible tax-advantaged savings vehicles available to American workers — you don't need an employer to offer one. But the two main types offer their tax advantages at different points in time:

• Traditional IRA: You may get a tax deduction when you contribute. Your investments grow tax-deferred. You pay income tax on withdrawals in retirement.
• Roth IRA: No tax deduction for contributions. Investments grow tax-free. Qualified withdrawals in retirement are completely tax-free.

Both have the same contribution limits: $7,000 per person in 2025 ($8,000 if age 50 or older). Both have the same contribution deadline: your tax filing deadline, typically April 15 of the following year.

Traditional IRA: The Deductibility Rules

Anyone with earned income can contribute to a traditional IRA — but whether you can deduct that contribution depends on whether you (or your spouse) have access to a workplace retirement plan like a 401(k).

If neither you nor your spouse has a workplace plan: Traditional IRA contributions are fully deductible regardless of income. Easy.

If you have a workplace plan (or your spouse does): The deductibility phases out based on your Modified Adjusted Gross Income (MAGI):

Filing Status	Full Deduction	Partial Deduction	No Deduction
Single / Head of Household (covered by workplace plan)	Below $79,000	$79,000–$89,000	Above $89,000
Married Filing Jointly (covered by workplace plan)	Below $126,000	$126,000–$146,000	Above $146,000
Married Filing Jointly (spouse covered, you are not)	Below $236,000	$236,000–$246,000	Above $246,000

You can still contribute to a traditional IRA even if you can't deduct it — this is called a non-deductible IRA contribution. The invested funds still grow tax-deferred, and tracking your basis (using IRS Form 8606) ensures you're not taxed twice on the principal when you withdraw.

Roth IRA: The Income Limits

Roth IRA contributions are subject to income limits based on MAGI:

Filing Status	Full Contribution	Partial Contribution	No Direct Contribution
Single / Head of Household	Below $150,000	$150,000–$165,000	Above $165,000
Married Filing Jointly	Below $236,000	$236,000–$246,000	Above $246,000

High earners above these thresholds cannot contribute directly to a Roth IRA — but they can use the backdoor Roth IRA strategy: make a non-deductible traditional IRA contribution and immediately convert it to a Roth IRA. When done correctly (and without other pre-tax IRA balances triggering the pro-rata rule), this results in a Roth IRA contribution with little or no tax owed on the conversion.

Which Is Better: Traditional or Roth?

The classic answer: choose traditional when you expect your tax rate in retirement to be lower than it is today; choose Roth when you expect your future tax rate to be higher.

In practice, the decision factors include:

• Current vs. future tax rate: Early-career earners in the 12% bracket are excellent Roth candidates — they're locking in tax-free growth at a low rate. High earners in the 32% bracket often prefer the traditional deduction now and expect to be in a lower bracket in retirement.
• Age and timeline: Younger savers benefit more from Roth because compounding has more time to work in the tax-free environment. Older savers nearing retirement may prefer the deduction today.
• Tax law uncertainty: If you're uncertain whether tax rates will rise (historically they have in times of rising deficits), Roth provides insurance against future rate increases.
• RMDs and estate planning: Roth IRAs have no Required Minimum Distributions during the owner's lifetime, making them valuable for those who don't need retirement income and want to leave a tax-free legacy to heirs.
• Flexibility: Roth IRA contributions (not earnings) can be withdrawn at any time, tax-free and penalty-free. This flexibility makes Roth a better emergency backstop than traditional accounts.

The Case for "Both": Split Contributions

Many financial planners recommend having both traditional and Roth savings in retirement — a tax diversification strategy. When all your retirement assets are in traditional accounts, every dollar you withdraw is taxable income, giving you no flexibility to manage your tax bracket. With a Roth balance, you can choose how much taxable income to recognize in any given year — staying below IRMAA thresholds, preserving ACA subsidies, or avoiding pushing Social Security into a higher taxable income tier.

Even if your workplace plan is entirely traditional, contributing to a Roth IRA on the side builds this flexibility over time.

Contribution Timing: Don't Miss the April 15 Window

Unlike 401(k) contributions, IRA contributions can be made up to the tax filing deadline — typically April 15 — for the prior tax year. This means you have until April 15, 2026, to make a 2025 IRA contribution. When making a prior-year contribution, you must specifically designate the contribution year with your IRA custodian to ensure it's credited correctly.

If you don't know your exact income for the prior year when making the contribution, you can make a traditional contribution first, then decide whether to convert it to Roth once you've calculated your MAGI and deductibility status.