A Traditional IRA is a bet that your tax rate in retirement will be lower than your rate today. You contribute pre-tax dollars now, the money grows tax-deferred, and every dollar withdrawn in retirement is taxed as ordinary income. For most households in the 22–24% bracket today who expect to be in the 12–22% bracket in retirement, this bet pays off. This calculator projects your Traditional IRA’s pre-tax balance at retirement, estimates the after-tax spendable value, and shows you exactly how much you’re saving in taxes each year you contribute. Enter your current balance, annual contribution, years to retirement, expected return, and tax rates.
How to use this calculator
Enter your current IRA balance, annual contribution (2026 limit: $7,000 if under 50, $8,000 if 50 or older), years until you expect to retire, anticipated annual investment return, your current marginal tax rate, and your expected retirement tax rate. The calculator runs the standard future value formula for the balance and contribution stream, then applies the retirement tax rate to estimate after-tax spendable value. The “Annual tax saved now” figure is your contribution multiplied by your current marginal rate — the immediate government subsidy on every dollar you contribute this year. Note: the after-tax estimate assumes all withdrawals are taxed at your flat retirement rate, which simplifies the actual calculation (RMD amounts can push you into multiple brackets). Use this as a planning estimate, not a tax-filing figure.
Why the Traditional IRA is a deferred — not free — tax break
The Traditional IRA’s benefit is often misunderstood as “tax-free growth.” It’s not. It’s tax-deferred growth with a future tax bill attached. Every dollar in your Traditional IRA will eventually be taxed as ordinary income — either when you withdraw voluntarily or when Required Minimum Distributions force withdrawals starting at age 73. The economic benefit comes from two sources: (1) the tax deferral itself means the money that would have gone to taxes stays invested and compounds, and (2) if your retirement rate is lower than your current rate, you pay the smaller rate on a larger pile. A household in the 32% bracket today planning to retire in the 22% bracket captures a 10-point spread on every dollar contributed. A household in the 12% bracket today who will be in the same bracket in retirement gains almost nothing from a Traditional IRA versus a Roth.
The RMD problem most people ignore until it’s too late
Traditional IRAs are subject to Required Minimum Distributions (RMDs) starting at age 73 (age 75 for those born in 1960 or later). The IRS calculates your required annual withdrawal based on your account balance and your life expectancy factor from the Uniform Lifetime Table. At age 73, the factor is 26.5 — meaning a $1,000,000 IRA requires a $37,736 withdrawal that year, regardless of whether you need the money. That withdrawal is fully taxable and can push you into a higher bracket, trigger Medicare IRMAA surcharges, and increase the taxable portion of Social Security benefits. The optimal strategy for most households: do Roth conversions during the “gap years” between retirement and age 73 — when income is lower — to shrink the Traditional IRA balance before RMDs start compounding the problem.
Traditional IRA vs Roth IRA: when each wins
Traditional IRA wins when: your current tax rate is significantly higher than your expected retirement rate (32%+ today, planning to retire at 22%). You are not covered by a workplace plan and want an unrestricted deduction. You plan to do Roth conversions during low-income retirement years. Roth IRA wins when: you’re in the 12% bracket today and expect to be in the same or higher bracket in retirement. You are above the Traditional IRA deduction phase-out ($79,000–$89,000 single, $126,000–$146,000 MFJ in 2026 if covered by a workplace plan) — at that point, a non-deductible Traditional contribution is inferior to a Roth contribution. You want to avoid RMDs — Roth IRAs have no RMDs during the owner’s lifetime. The break-even rule of thumb: if your current rate exceeds your expected retirement rate by 5+ percentage points, Traditional wins. If the gap is smaller or reversed, Roth wins.
FAQ
What is the 2026 Traditional IRA contribution limit?
$7,000 if under age 50. $8,000 if age 50 or older (the catch-up contribution is $1,000 extra). This limit is combined across all your IRAs — you cannot contribute $7,000 to a Traditional IRA and $7,000 to a Roth IRA in the same year; the $7,000 (or $8,000) is the total across both.
Can I deduct my Traditional IRA contribution?
If you are not covered by a workplace retirement plan (401(k), 403(b), etc.), yes — you can deduct the full contribution regardless of income. If you are covered by a workplace plan, the 2026 deduction phases out from $79,000 to $89,000 MAGI for single filers and $126,000 to $146,000 for married filing jointly. Above the phase-out, you can still contribute but get no deduction — at that point a Roth contribution usually makes more sense.
When do Required Minimum Distributions start?
Age 73 if born 1951–1959. Age 75 if born 1960 or later (per SECURE 2.0). Your first RMD can be delayed until April 1 of the year after you turn 73, but that means taking two distributions in one year — which often creates a larger tax hit than spreading them.
Can I do a Roth conversion from a Traditional IRA?
Yes. You can convert any amount from a Traditional IRA to a Roth IRA at any age. You pay ordinary income tax on the converted amount in the year of conversion. The ideal time to convert: retirement gap years (after stopping work but before Social Security or RMDs start), when your income is temporarily lower and you can convert at a lower effective rate.
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Andy Gaber is the founder of Digital Dashboard Hub, a suite of 255+ interactive financial, productivity, and wellness tools. He built DDH after getting frustrated with financial apps that gave outputs without context. Follow along for tool tutorials, revenue analytics breakdowns, and honest takes on personal finance.