Skip to content
2026 Statutory Rates Primary Source Verified Always 100% Free

Roth IRA Calculator (2026)

Project your tax-free Roth IRA retirement wealth and compare side-by-side against a Traditional IRA based on your current vs. expected retirement tax brackets.

Quick Answer: A Roth IRA builds 100% tax-free retirement wealth by investing after-tax dollars today, ensuring that all future capital gains, dividends, and retirement distributions are completely exempt from federal and state income taxes after age 59½. Under IRS Notice 2025-84 guidelines for 2026, the maximum annual IRA contribution limit is $7,500 (with an additional $1,100 catch-up for individuals aged 50 and older). For an investor starting with $5,000 and depositing $7,000 annually over a 40-year horizon at an annualized 7.5% return compounded annually, total personal contributions equal $285,000.00, generating $1,396,016.83 in compound tax-free growth for an ending Roth IRA balance of exactly $1,681,016.83. In contrast, an identical Traditional IRA would owe taxes on all withdrawals, yielding a lower net spendable sum if retirement tax rates remain constant.

Roth Contribution Strategy
Existing invested balance
$
2026 IRS Cap: $7,500 ($8,600 if 50+)
$
Broad market average is ~7–10%
%
Years until withdrawal
yrs
Used to compute Traditional IRA taxes
%

Projected Roth IRA Wealth

100% Tax-Free
Projected Roth IRA Balance $0 100% tax-free spendable retirement distributions
Your Contributions $0
Total Growth $0
Traditional IRA (After Tax) $0
Roth Tax Advantage $0

Side-by-Side: Roth vs. Traditional IRA

Both accounts accumulate the same gross balance under identical investment growth. However, Traditional withdrawals are fully taxable as ordinary income in retirement, whereas Roth withdrawals are 100% tax-free.

Roth IRA (Net) $0 $0 tax paid upon withdrawal
Traditional IRA (Net) $0 Taxes deducted at retirement
Primary Source Verified Last reviewed: October 2026

Calculation Methodology: Roth IRA Calculator (2026)

Mathematical Formula

FV = PV · (1 + r)^n + PMT · [((1 + r)^n - 1) / r]

FV = Future retirement account balance
PV = Initial existing Roth IRA balance
PMT = Annual contribution (Capped at $7,500/year for under 50, $8,600/year for age 50+)
r = Annual expected rate of return (Annual compounding standard for IRAs)
n = Investment horizon in years
Traditional IRA Net Value = Total Accumulated Balance × (1 - Retirement Tax Rate)
Roth IRA Advantage = Total Accumulated Balance is 100% tax-free with zero tax deducted upon withdrawal.

Verified Worked Example (Benchmark)

Benchmark Parameters: Initial Balance = $5,000.00 · Annual Contribution = $7,000.00 · Annual Expected Return = 7.50% · Investment Horizon = 40 Years · Compounding Frequency = Annual.

  1. Annual Growth Rate (r): 0.075.
  2. Compounding Factor (1 + r)^n: (1.075)^40 ≈ 18.04423869.
  3. Future Value of Starting Balance: $5,000 × 18.04423869 = $90,221.19.
  4. Future Value of Annual Contributions: $7,000 × [(18.04423869 - 1) ÷ 0.075] = $7,000 × 227.2565158 = $1,590,795.64.
  5. Total Ending Roth IRA Balance: $90,221.19 + $1,590,795.64 = $1,681,016.83.
  6. Total Out-of-Pocket Contributions: $5,000 + ($7,000 × 40) = $285,000.00.
  7. Total Compound Tax-Free Growth: $1,681,016.83 - $285,000.00 = $1,396,016.83.

Verification: Recomputed by running the deployed engine with $5k balance, $7,000/yr contribution, 7.5% annual return over 40 years. Yields total $1,681,016.83, growth $1,396,016.83.

Frequently Asked Questions

Primary source guidance on rules, formulas, and regulations.

← More in Retirement

Related Retirement Calculators

Retirement

401(k) Calculator

401(k) calculator: project your balance to retirement with the 2026 limit ($24,500, plus $8,000 catch-up at 50+), contributions, and growth.

Retirement

Retirement Calculator

Retirement calculator: project your nest egg from current savings and monthly contributions, and see what retirement age your plan supports.

Retirement

Social Security Calculator

Estimate your Social Security benefit: enter your earnings and see your monthly payment at 62, 67 and 70. Free estimator using 2026 bend points.