Tax-free Roth growth compared with a taxable account.
How to use this calculator
Every field updates the result as you type — there is no submit step. The inputs below are pre-filled with a realistic example so you can see how the tool behaves before entering your own figures.
| Field | Unit | What it means |
|---|---|---|
| Current balance | $ | Enter a numeric value. |
| Annual contribution | $ | Enter a numeric value. |
| Expected return | %/yr | Enter a numeric value. |
| Years until withdrawal | — | Enter a numeric value. |
| Current tax rate | % | Enter a numeric value. |
| Retirement tax rate | % | Enter a numeric value. |
Worked example
Using the default values loaded into the calculator above, the result is:
| Input | Value |
|---|---|
| Current balance ($) | 10000 |
| Annual contribution ($) | 7000 |
| Expected return (%/yr) | 7 |
| Years until withdrawal | 25 |
| Current tax rate (%) | 24 |
| Retirement tax rate (%) | 22 |
| Output | Value |
|---|---|
| Roth balance (tax-free) | $528,009.62 |
| Total contributed | $185,000.00 |
| Tax-free growth | $343,009.62 |
| Traditional IRA after tax | $411,847.50 |
| Taxable account equivalent | $316,061.92 |
| Roth advantage vs traditional | $116,162.12 |
Reading the result
Financial projections compound small assumption changes into large differences over time. Rates, fees and tax treatment vary by lender and jurisdiction, so treat the output as a well-structured estimate for comparing options rather than a quotation.
Figures that change annually — tax bands, contribution limits, statutory rates — are exposed as editable inputs. Check them against current published values before relying on the result.
Sharing and saving a calculation
The "Copy link" button encodes every value you have entered into the page URL. Opening that link restores the calculation exactly, which makes it easy to bookmark a scenario, send it to someone else, or keep several variations side by side in separate tabs.
Frequently asked questions
What does the Roth IRA Calculator do?
Tax-free Roth growth compared with a taxable account.
What result do the default values produce?
With the values pre-loaded in the calculator, roth balance (tax-free) comes to $528,009.62.
Is this calculator free to use?
Yes. It is free, requires no account, and runs entirely in your browser — nothing you enter is transmitted or stored on a server.
Can I save or share a calculation?
Yes. The "Copy link" button builds a URL containing all your entered values. Anyone opening that link sees the same calculation.
How accurate is the result?
The calculation itself is exact for the inputs given. Real-world accuracy depends on how well those inputs reflect your actual situation, so review the assumptions before relying on the figure.