Retirement Planning Tool

Roth vs Traditional IRA Calculator - IRA Comparison & Tax Calculator

Free Roth vs Traditional IRA calculator to compare tax benefits and determine optimal IRA choice. Calculate after-tax retirement values based on current and future tax rates. Our calculator uses compound growth formulas and tax rate analysis to show which IRA type maximizes your retirement savings based on your unique tax situation and time horizon.

Last updated: January 10, 2025

Side-by-side after-tax value comparison
Current vs. future tax rate analysis
Personalized IRA recommendations

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Roth vs Traditional IRA Calculator
Compare Roth and Traditional IRA benefits based on your tax situation

2024 limit: $7,000 ($8,000 if 50+)

Historical stock market average: ~10%, conservative: 6-7%

Comparison Results

Roth IRATax-Free Growth

$961,437

Total value at retirement (tax-free)

Traditional IRATax-Deferred

$749,921

After-tax value ($961,437 pre-tax)

Tax savings now: $1,560 annually

Roth Advantage

$211,516

More in Roth IRA at retirement

Years to Retirement

35

Total Contributions

$228K

Recommendation

Roth IRA recommended: Long time horizon maximizes tax-free growth benefits.

Tax Rate Analysis

Current Tax Rate:24%
Retirement Tax Rate:22%
Tax Rate Difference:2% lower later

Roth vs Traditional IRA Calculator Features

Roth IRA Calculator
Calculate tax-free growth and retirement withdrawals

Key benefit

Tax-Free Forever

Pay taxes now, no taxes on growth or withdrawals

Traditional IRA Calculator
Calculate immediate tax deduction and deferred growth

Key benefit

Tax Deduction Now

Reduce current taxes, pay later on withdrawals

Tax Rate Comparison
Analyze current vs. future tax bracket impact

Critical factor

Now vs. Later Rates

Most important factor in IRA decision

After-Tax Value Calculator
Calculate actual spendable retirement value

True comparison

Net Spendable Income

What you actually get to spend in retirement

IRA Growth Calculator
Project compound growth over time for both account types

Time factor

Compound Interest

Both IRAs grow tax-deferred or tax-free

Break-Even Tax Rate
Determine the tax rate where both IRAs are equal

Decision point

Crossover Rate

Tax rate where outcomes are identical

Quick Example Result

$6,500/year from age 30-65, 7% return, 24% current tax, 22% retirement tax:

Roth Value

$961K

Traditional

$750K

Difference

$212K

Years

35

How Our Roth vs Traditional IRA Calculator Works

Our Roth vs Traditional IRA calculator compares the after-tax retirement values of both account types by projecting compound growth over your investment timeline and applying your current and expected retirement tax rates. The calculator uses standard compound interest formulas to show exactly how much spendable income each IRA type will provide in retirement after accounting for all taxes.

IRA Comparison Formulas

Roth IRA After-Tax Value:
Total = Σ(Contribution × (1 + r)^years)
After-Tax = Total (no taxes on withdrawal)
Traditional IRA After-Tax Value:
Total = Σ(Contribution × (1 + r)^years)
After-Tax = Total × (1 - Retirement Tax Rate)
Tax Savings (Traditional):
Annual Savings = Contribution × Current Tax Rate

The key insight: Roth and Traditional IRAs grow identically before taxes, but the timing of taxation determines which is better. If your tax rate is lower in retirement, Traditional wins. If your tax rate is higher in retirement, Roth wins. If tax rates are equal, outcomes are mathematically identical—but Roth offers other benefits like no RMDs and tax-free inheritance.

📊 Tax Impact Comparison

Visualization of tax timing impact on Roth vs. Traditional IRA values

Key Decision Factors

The Roth vs. Traditional IRA decision goes beyond simple tax rate comparison. Consider your current and future tax situations, retirement income sources, estate planning goals, and flexibility needs. Roth IRAs offer unique advantages like no required minimum distributions, tax-free inheritance to heirs, and flexibility to withdraw contributions anytime. Traditional IRAs provide immediate tax relief and can be beneficial if you expect significantly lower income (and thus lower tax rates) in retirement.

  • Tax rates: Choose Traditional if current rate is much higher than retirement rate; Roth if opposite
  • Time horizon: Longer periods favor Roth due to decades of tax-free compounding
  • RMDs: Roth has no RMDs, allowing continued growth and better estate planning
  • Flexibility: Roth contributions can be withdrawn anytime tax and penalty-free
  • Income limits: Roth has income limits; Traditional does not (deduction may be limited)
  • Tax diversification: Many experts recommend having both for retirement flexibility

Sources & References

  • Internal Revenue Service (IRS) - IRA Contribution Limits and RulesOfficial IRS guidance on Roth and Traditional IRA regulations
  • IRS Publication 590-A - Contributions to Individual Retirement ArrangementsComprehensive guide to IRA contribution rules and limits
  • IRS Publication 590-B - Distributions from Individual Retirement ArrangementsRules for IRA withdrawals, RMDs, and tax treatment

Roth vs Traditional IRA Calculator Examples

IRA Comparison Calculator Example
Compare Roth and Traditional IRA for 35-year investment horizon

Investment Profile:

  • Annual Contribution: $6,500
  • Current Age: 30
  • Retirement Age: 65 (35 years)
  • Current Tax Rate: 24%
  • Retirement Tax Rate: 22%
  • Expected Return: 7% annually

Comparison Results:

  1. Total contributions: $6,500 × 35 = $227,500
  2. Roth grows to: ~$652,000 (tax-free)
  3. Traditional grows to: ~$652,000 (pre-tax)
  4. Traditional after 22% tax: ~$508,000
  5. Roth advantage: ~$144,000 more spendable
  6. Current tax savings (Traditional): $1,560/year

Result: Roth IRA provides $212K more in spendable retirement income

Despite similar tax rates, Roth wins due to tax-free growth over 35 years. Traditional saves $1,560/year in current taxes.

High Earner Example

32% now → 22% retirement (10% drop)

Traditional wins by ~$65K

Young Professional Example

22% now → 24% retirement (rates rise)

Roth wins by ~$85K

Frequently Asked Questions

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