Roth vs. Traditional IRA 2026: A Decision Tree With The New IRS Limits

The Roth-vs.-Traditional IRA question has a clear answer for most people once you walk through six yes/no decisions but each step is gated by 2026 IRA income and contribution thresholds that just changed.

The College Investor's updated decision tree condenses our massive traditional vs. Roth IRA explainer guide into a single flowchart. Here's how to use it

By The Numbers

• $7,500 — IRA contribution limit if you're under 50
• $8,600 — Limit if you're 50 or older
• $153K-$168K — Roth IRA MAGI phase-out for single filers
• $242K-$252K — Roth IRA MAGI phase-out for married filing jointly
• $81K-$91K — Traditional IRA deduction phase-out for single filers covered by a workplace plan
• $129K-$149K — Traditional IRA deduction phase-out for married filing jointly when the contributor is covered

How To Use The IRA Decision Tree

Step 1: Earned compensation. Wages, self-employment, commissions, or a spouse's earned income all count. Without it, no IRA contributions.

Step 2: Roth income test. Under the Modified Adjusted Gross Income (MAGI) cap? You can contribute directly. Over it? Consider the Backdoor Roth path — a non-deductible Traditional contribution that you can convert to a Roth.

Step 3: Workplace plan coverage. A 401(k), 403(b), SEP IRA, SIMPLE IRA, or pension from any employer flips you into the "covered" bucket — even if you don't participate. Availability is what counts, not participation.

Step 4: Traditional deduction test. If you or your spouse are covered and income is above the phase-out, the Traditional IRA deduction disappears. Roth becomes the clear winner because you'd otherwise be paying tax on the way in and losing tax-free withdrawals.

Step 5: The discipline check. When a Traditional IRA deduction is on the table, the math favors it — but only if you actually invest the tax refund.

According to financial planner Larry Russell, "for savers who reinvest the tax savings, Traditional wins. For savers who spend the refund, Roth wins by forcing discipline."

What To Watch Out For: The 2026 phase-outs shifted. Single covered filers lose deductibility $2,000 earlier than in 2025 (range now starts at $81K vs. $79K), and the Roth MAGI cap for married filing jointly jumped to $242K-$252K. If you were near a limit last year, rerun the tree before making a 2026 contribution.

Common Question

What is the difference between a Roth IRA and a Traditional IRA in 2026?

A Traditional IRA gives you an upfront tax deduction (subject to income limits if you're covered by a workplace plan) with taxes due on withdrawals in retirement, while a Roth IRA is funded with after-tax dollars and grows tax-free, with no required minimum distributions.

How does this six-question IRA decision tree help me choose between Roth and Traditional?

It walks you through six yes/no checks — earned compensation, the Roth MAGI cap, Traditional deductibility, your expected retirement tax rate, contribution discipline, and RMD/legacy goals — so most people land on a clear answer without rerunning the full Roth-vs.-Traditional analysis.

What are the 2026 IRA contribution limits if I am under 50 or age 50 and older?

The IRA contribution limit is $7,500 if you're under 50 and $8,600 if you're 50 or older, thanks to a $1,100 catch-up contribution.

What are the 2026 income phase-out ranges for Roth IRA contributions and Traditional IRA deductions?

Roth IRA contributions phase out at $153,000–$168,000 for singles/heads of household and $242,000–$252,000 for married filing jointly, while Traditional IRA deductions for workplace-plan-covered filers phase out at $81,000–$91,000 (single) and $129,000–$149,000 (married filing jointly when the contributor is covered), with a separate $242,000–$252,000 range when only the non-covered spouse contributes.

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