Last updated: July 13, 2026
Roth or Traditional IRA: Which Is Better?
The whole decision comes down to one comparison: your tax rate now versus your tax rate when you withdraw. Choose Roth if you expect to be in the same or a higher bracket in retirement, since you lock in today's lower rate and the growth comes out tax-free. Choose Traditional if you expect a lower bracket later, because the deduction you take now is worth more than the tax you'll owe on withdrawals. The break-even is simply where those two rates are equal. At that point the after-tax result is identical, and Roth's tiebreakers (no required distributions, easier early access to contributions, insurance against future rate hikes) tip most people toward it. Since nobody knows future tax law, many savers hold some of each. The calculator below puts your actual current and expected rates into that comparison and shows the after-tax dollars each account leaves you.
Why the Answer Isn't Obvious
You've decided to open an IRA but can't figure out which type makes sense. Someone at work swears by Roth. Your parents say Traditional is smarter. The truth is neither is universally "better," because the right choice depends on when you'll pay less in taxes.
This Roth vs Traditional IRA calculator compares both options using your actual tax rates. Enter what you pay now and what you expect to pay in retirement, and see which account leaves you with more spendable money. The common mistake is looking only at the tax deduction today without considering what you'll owe later.
For 2026, you can contribute up to $7,500 to IRAs ($8,600 if you're 50 or older). Roth contributions have income limits that phase out starting at $153,000 for single filers and $242,000 for married couples filing jointly. Verify current limits at irs.gov.
This calculator is about the IRA account choice itself, which type leaves you more after tax and the rate where the two break even; for the tax-year impact of that choice across your 401(k) and IRA together, see the Traditional vs Roth 401(k) and IRA tax-impact calculator.
How They Compare at a Glance
| Feature | Traditional IRA | Roth IRA |
|---|---|---|
| Tax timing | Deduct now, pay later | Pay now, withdraw tax-free |
| 2026 contribution limit | $7,500 ($8,600 if 50+) | $7,500 ($8,600 if 50+) |
| Income limits | None for contributions; deductibility may be limited | Phaseout at $153,000+ (single) |
| Required distributions | Start at age 73 | None during your lifetime |
| Early withdrawal | Taxes + 10% penalty before 59½ | Contributions anytime; earnings have rules |
The Tax Rate Question That Drives Everything
Traditional IRA: You deduct contributions at your current tax rate, then pay taxes on withdrawals at your retirement rate. If your retirement rate is lower, you win.
Roth IRA: You contribute after-tax dollars now, then withdraw everything tax-free. If your retirement rate is higher (or equal), you typically win.
When rates are equal, the math is identical—but Roth still has edge cases in its favor: no required distributions, more flexibility before 59½, and protection against future tax law changes.
Two Scenarios to Consider
Example 1: Early Career, Lower Tax Bracket
Setup: Age 28, earning $58,000, currently in the 22% bracket. Expects higher income and 32% bracket in retirement. Contributing $7,000/year for 37 years at 7% return.
Result: Traditional ending balance: ~$1.15M, after 32% tax = $782,000 spendable. Roth ending balance: ~$897,000 (contributed after-tax) = $897,000 spendable.
Takeaway: Roth wins by $115,000 because paying 22% now beats paying 32% later. This is the textbook case for choosing Roth early in your career.
Example 2: Peak Earning Years, Higher Bracket
Setup: Age 52, earning $165,000, in the 32% bracket. Expects modest retirement spending in the 22% bracket. Contributing $8,000/year for 13 years at 7% return.
Result: Traditional ending balance: ~$175,000, after 22% tax = $136,500 spendable. Roth: ~$119,000 (contributed after 32% tax) = $119,000 spendable.
Takeaway: Traditional wins by $17,500 because deducting at 32% and paying 22% later creates real savings. This is when Traditional makes sense.
When Each Account Makes Sense
Choose Roth When
- You're early in your career with lower current income
- You expect higher tax rates in retirement
- You might need to access contributions before 59½
- You want to avoid required minimum distributions
- You're uncertain and want protection against tax law changes
Choose Traditional When
- You're in peak earning years with high current taxes
- You expect significantly lower income in retirement
- You plan to retire in a lower-tax state
- You need the tax deduction now for cash flow
- You're over Roth income limits and prefer simplicity over backdoor strategies
Two Questions That Sit Just Outside This One
A Roth contribution is after-tax money, so it comes straight out of your take-home pay rather than reducing this year's taxable income the way a Traditional contribution does. If you're not sure what a given contribution actually costs your paycheck, the salary take-home calculator gives you the after-tax number to budget from before you decide how much to route into the Roth.
The IRA also fills up fast at a few thousand dollars a year. Once you've maxed it, the decision shifts to where the next dollar goes: another sheltered account or a plain taxable brokerage. The taxable vs tax-advantaged comparison settles that one by showing what annual tax drag costs a taxable account over decades.
What This Calculator Assumes
This comparison uses flat tax rates you provide—it doesn't model progressive brackets, state taxes, or changes over time. Real tax situations are more complex.
Investment returns are assumed constant. Real markets fluctuate. The calculator also doesn't account for the value of avoiding required distributions (Roth advantage) or the time value of the Traditional tax deduction reinvested.
Use this for directional guidance, not precise planning. Try several scenarios with different tax rate assumptions to see how sensitive the outcome is.
Official Sources
- IRS.gov — Roth IRAs — Contribution limits, income limits, qualified distributions
- IRS.gov — Traditional IRAs — Deduction rules, RMD requirements
- SEC Investor.gov — IRA comparison education
Limits shown are for 2026 per IRS Notice 2025-67. Verify current figures at irs.gov.