Roth vs Traditional IRA Calculator 2026 — Which IRA Saves You More?

How to Use the Roth vs Traditional IRA Calculator

This Roth vs Traditional IRA Calculator helps you compare the two IRA types side-by-side to see which one leaves you with more after-tax money in retirement. Enter your current age, retirement age, annual income, current IRA balance, and annual contribution. Then enter your current tax rate and expected retirement tax rate.

The calculator projects the after-tax value of both IRA types at retirement, calculates the Traditional IRA tax savings now, and estimates the break-even retirement tax rate where both options are equal. It also checks IRA eligibility based on your income and filing status.

Roth vs Traditional IRA Formula & Methodology

Traditional IRA (Pre-Tax)

Contributions are tax-deductible now. You save contribution × current tax rate in taxes each year. The money grows tax-deferred, and withdrawals in retirement are taxed at your ordinary income rate. After-tax value = Future Value × (1 − retirement tax rate).

Roth IRA (Post-Tax)

Contributions are made with after-tax dollars (no deduction now). The money grows tax-free, and qualified withdrawals in retirement are completely tax-free. After-tax value = Future Value (no taxes due).

Key Decision Factors

Choose Roth if: You expect to be in a higher tax bracket in retirement, you're early in your career (current rate is low), or you want tax-free income in retirement. Choose Traditional if: You're in a high bracket now and expect lower income in retirement, you want the immediate tax deduction, or you need to lower your current taxable income.

The Math

Future value uses the compound growth formula: FV = PV × (1 + r)ⁿ + PMT × [((1 + r)ⁿ − 1) ÷ r]. The break-even tax rate is the rate at which after-tax Traditional = after-tax Roth. If your retirement rate is below the break-even, Traditional wins; if above, Roth wins.

IRA Comparison Table

Data Sources & Methodology

• IRA Limits: IRS — 2026 IRA Contribution Limits (Revenue Procedure 2025-xx).
• Roth Phase-Out: IRS Publication 590-A — Roth IRA income limits for 2026.
• Traditional Deductibility: IRS — Modified AGI limits for Traditional IRA deduction if covered by workplace plan.
• Historical Returns: S&P 500 average annual return ~10% nominal, ~7% inflation-adjusted.

Last Updated: May 2026. Tax laws and contribution limits are subject to change.

Frequently Asked Questions (FAQs)

Should I choose Roth or Traditional IRA?

The decision depends on your current vs expected future tax rate. If you are in a low tax bracket now (10-12%) and expect higher income later, Roth likely wins. If you are in a high bracket now (32%+) and expect lower income in retirement, Traditional wins. The break-even tax rate in our calculator shows the exact threshold where both options produce the same after-tax result.

Can I contribute to both a Roth and Traditional IRA in the same year?

Yes — you can split your contributions between both accounts, but the combined total cannot exceed the annual IRA limit ($7,000 for 2026, $8,000 if age 50+). For example, you could contribute $4,000 to a Roth IRA and $3,000 to a Traditional IRA. The deductible portion of your Traditional IRA contribution depends on your income and whether you (or your spouse) have a workplace retirement plan.

What is a Backdoor Roth IRA and do I need one?

A Backdoor Roth IRA is a strategy for high earners whose income exceeds the Roth IRA direct contribution limits ($153,000 single, $230,000 married filing jointly in 2026). You contribute to a Traditional IRA (no income limit) and then convert the funds to a Roth IRA — known as a Roth conversion. There is no income limit on Roth conversions. However, if you have existing Traditional IRA balances, the pro-rata rule may apply and make this less tax-efficient.

What happens if I withdraw IRA money before age 59½?

Early withdrawals from a Traditional IRA are subject to a 10% penalty plus ordinary income tax on the withdrawn amount (with some exceptions: first-time home purchase up to $10,000, qualified education expenses, medical expenses exceeding 7.5% of AGI, disability, and substantially equal periodic payments). Roth IRA contributions can be withdrawn anytime tax- and penalty-free. Earnings withdrawn before age 59½ within the 5-year holding period may be subject to tax and penalty.

Are required minimum distributions (RMDs) different for Roth vs Traditional?

Yes — Traditional IRAs require RMDs starting at age 73 (under SECURE Act 2.0). Roth IRAs have no RMDs during the original owner's lifetime. This is a major advantage for Roth IRAs if you do not need the money in retirement and want to leave the account to heirs. Beneficiaries of both account types must take RMDs based on their life expectancy.