Roth vs Traditional IRA: Which Is Right for You?

The Core Difference

Both Roth and Traditional IRAs are tax-advantaged retirement accounts, but they handle taxes at opposite ends of the timeline.

The math is identical if your tax rate is the same in both periods. The question is whether your tax rate will be higher now or in retirement — and that question is harder to answer than it appears.

2025 Contribution Limits and Income Phaseouts

For 2025, the annual contribution limit is $7,000 for both account types ($8,000 if you're 50 or older — the "catch-up" contribution). This limit is per person, not per account. You can split contributions between both account types, but the total cannot exceed $7,000.

Roth IRA Income Limits (2025)

Roth IRA contributions phase out at higher incomes. For 2025:

• Single filers: Full contribution up to $150,000 MAGI; phases out between $150,000–$165,000; ineligible above $165,000.
• Married filing jointly: Full contribution up to $236,000 MAGI; phases out between $236,000–$246,000; ineligible above $246,000.

High earners who exceed these limits can still access Roth benefits via the backdoor Roth IRA — making a non-deductible Traditional IRA contribution and immediately converting it to Roth. This strategy works cleanly if you have no pre-tax IRA balances (due to the pro-rata rule).

Traditional IRA Deductibility Limits

Anyone can contribute to a Traditional IRA regardless of income, but the deductibility phases out if you (or your spouse) have access to a workplace retirement plan. For 2025, the deduction phases out between $79,000–$89,000 for single filers with a workplace plan, and between $126,000–$146,000 for married filers where the contributing spouse has a workplace plan.

The Tax Rate Question

The fundamental Roth vs Traditional decision depends on whether your marginal tax rate will be higher today or in retirement. Here are the general guidelines:

Roth tends to be better when:

• You are early in your career and in a low tax bracket (10% or 12%)
• You expect your income — and tax rate — to increase significantly
• You expect tax rates to rise broadly (e.g., current rates expire after 2025 under the Tax Cuts and Jobs Act sunset)
• You want tax-free income in retirement to manage Medicare premiums or Social Security taxation
• You want to avoid Required Minimum Distributions (Roth IRAs have no RMDs)

Traditional tends to be better when:

• You are in a high tax bracket (32%, 35%, or 37%) now and expect to drop in retirement
• You need the deduction to reduce taxable income today
• Your income is too high for Roth contributions (and the backdoor approach doesn't fit)
• You expect to convert to Roth later during low-income years (e.g., early retirement gap years)

Roth Conversions: The Best of Both Worlds

You are not locked into one account type forever. A Roth conversion moves money from a Traditional IRA (or 401(k)) into a Roth IRA. You pay ordinary income taxes on the converted amount in the year of the conversion — but the money then grows and can be withdrawn tax-free in retirement.

Roth conversions are most powerful in low-income years — for example, after retiring but before claiming Social Security, or during a gap year with reduced employment income. By converting enough to "fill up" a low tax bracket (e.g., the 12% or 22% bracket), you can gradually move money into Roth at a lower tax cost than you'd pay later when RMDs force higher withdrawals.

What About a Roth 401(k)?

Many employers now offer a Roth 401(k) option alongside the traditional 401(k). Unlike a Roth IRA, there are no income limits on Roth 401(k) contributions. The 2025 401(k) contribution limit is $23,500 ($31,000 for those 50+). High earners who are phased out of direct Roth IRA contributions can use the Roth 401(k) to get significant Roth exposure without the income restriction.

The Practical Answer for Most People

For most people under 40 in the 10%, 12%, or 22% tax bracket, the Roth IRA is the better choice — taxes are relatively low now, and decades of tax-free compounding creates enormous value. For those in the 32%+ bracket, a Traditional (or Roth 401(k) up to match limit, then Traditional) often makes more sense.

A common strategy is to diversify across both: contribute pre-tax to your 401(k) to reduce current taxes, and open a Roth IRA for tax-free growth and flexibility. Entering retirement with both pre-tax and Roth assets gives you significant control over your tax liability each year.