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Roth vs Traditional IRA — which wins for you?

Most calculators get this wrong by ignoring the tax savings you can reinvest each year with a Traditional IRA. Ours models the full picture — giving you a fair, accurate answer in under 60 seconds.

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Roth vs Traditional IRA Calculator

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📋 Optional — Check Roth Eligibility
Reinvest Traditional tax savings Models the annual tax deduction from the Traditional IRA invested at the same return rate — the correct way to make this comparison. We recommend this — it models what actually happens when you invest your annual tax refund.
Suggested based on your current tax bracket — the 35% bracket spans two capital gains rates, so 15% is used as an approximation. Edit if you know your actual rate.
Roth IRA Balance
Tax-free at retirement
Traditional IRA
After-tax at retirement
Break-Even Rate
Roth wins above this rate

📐 How we calculate this
  • Traditional IRA includes reinvested tax savings — most calculators compare only the raw IRA balances, which unfairly favors Roth. Our model adds the after-tax value of the annual deduction you reinvest each year, accounting for capital gains tax on the growth — not just the raw compounded amount — for a more realistic comparison.
  • The break-even result: With realistic capital gains drag on the reinvested savings, the break-even retirement tax rate comes out slightly below your current marginal rate — the exact gap depends on your capital gains rate and time horizon, and is recalculated live above. Traditional needs your retirement bracket to drop by more than a simple rate comparison would suggest before it pulls ahead.
  • Assumptions: Consistent marginal rates throughout accumulation; full contribution every year; no state income taxes; Traditional deductibility assumed (phases out with income + workplace plan — not modeled); 7% default return is a long-run real equity market estimate. Contributions are assumed made at end of each year (ordinary annuity). Some calculators assume beginning-of-year, which produces balances approximately one return-rate percent higher — neither is wrong, they model different timing assumptions.
  • Official rules: IRS Publication 590-A →
For informational purposes only. Not financial advice. Results assume consistent annual contributions, constant return rates, and full Traditional IRA deductibility. State income taxes not modeled. Actual outcomes depend on market performance, tax law changes, and individual circumstances. Consult a qualified financial advisor before making major decisions.
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