Roth IRA Calculator
Use this calculator to compare the Roth IRA to an ordinary taxable investment.
How the roth ira calculator works
It compounds your current Roth balance and annual contributions at your expected return to retirement. Because you contribute after-tax dollars, the entire ending balance — including all growth — is tax-free.
Worked example: with current roth balance of $10,000, annual contribution of $7,500 and years until retirement of 30, the roth ira calculator shows tax-free value in 30 years of $834,170.
- Total contributions
- $235,000
- Tax-free growth
- $599,170
- Balance at retirement
- $834,170
- Growth multiple
- 3.55×
| Annual contribution | Tax-free value in 30 years |
|---|---|
| $2,000 | $278,269 |
| $4,000 | $480,415 |
| $6,000 | $682,561 |
| $7,500 | $834,170 |
The formula
Each year: balance = (balance + annual contribution) × (1 + return). Qualified withdrawals, including growth, are not taxed.
Results are estimates for educational purposes and are not financial advice. Confirm exact figures with your lender, plan administrator or advisor.
Questions about the roth ira calculator
What makes a Roth IRA tax-free?
You contribute money you have already paid tax on, so qualified withdrawals in retirement — contributions and all growth — come out completely tax-free.
What is the Roth IRA contribution limit?
For 2026 it is $7,000, or $8,000 if you are 50 or older, subject to income phase-outs. The calculator lets you model any amount up to those limits.
Roth or traditional IRA — which is better?
Roth wins if you expect a higher tax rate in retirement than today; traditional wins if you expect a lower one. Compare both to see the after-tax difference.
Is the Roth IRA Calculator free to use?
Yes. Every calculator on FinCalculators is completely free, with no sign-up, login or paywall. You can run as many scenarios as you like.
How much will a Roth IRA grow in 30 years?
Contributing $6,000 a year for 30 years at a 7% average return grows to about $570,000 — and because it is a Roth, qualified withdrawals are entirely tax-free. Higher contributions or returns increase the total further.
- 2026 Retirement Contribution Limits (401k, IRA, Roth) — 401(k), IRA and Roth limits with catch-ups, super catch-up and income phase-outs.