What Is a Roth IRA Calculator?

A Roth IRA flips the usual retirement-account deal on its head: you contribute money you’ve already paid tax on, and in exchange, qualified withdrawals in retirement — contributions and decades of growth — generally come out federal-tax-free. This calculator projects what that tax-free pot could look like. Enter your current balance, annual contribution, years until retirement, and an expected return, and it shows your projected balance, splitting it into the money you put in versus the growth the market added on top.

How It Works

The math is classic compound growth with regular deposits. Your starting balance compounds every year, and each new contribution starts its own compounding clock the year it’s added:

The breakdown then separates total contributed (starting balance plus every deposit) from tax-free growth (everything above that). In a Roth, that second number is the prize: it’s the slice that would have been taxed in most other accounts but generally isn’t here, provided you meet the qualified-withdrawal rules.

Worked Example: 30 Years of Steady Deposits

Start with $10,000 already in a Roth IRA, add $6,000 a year for 30 years, and assume a 7% annual return. The starting balance alone compounds to about $76,123, and the stream of contributions grows to roughly $566,765, for a projected total of about $642,887.

Here’s the striking part: you only put in $190,000 — the $10,000 you started with plus $180,000 of deposits. The remaining ~$452,887, more than two-thirds of the final balance, is investment growth. In a Roth IRA, that entire growth slice can come out tax-free in a qualified withdrawal, which is why starting early matters more than contributing heroically later.

Roth IRA vs. a Regular Taxable Account

Imagine investing the same money in an ordinary brokerage account instead. Every year, dividends and fund distributions get taxed, and when you finally sell, capital gains tax takes a bite of the growth. Those drags compound just like returns do — against you. The Roth removes them: no tax on dividends as they arrive, no capital gains tax on qualified withdrawals. The trade-offs are real, though: contributions are capped each year by IRS rules that change periodically, income limits can restrict who may contribute directly, and pulling out earnings early can trigger taxes and penalties. A taxable account, by contrast, has no caps and no withdrawal rules — many savers sensibly use both.

Common Mistakes to Avoid

The classic blunder is contributing cash to a Roth IRA and never investing it — money parked in the settlement fund doesn’t compound. Second, assuming last year’s contribution limit still applies; the IRS adjusts limits and income thresholds periodically, so verify current figures before contributing. Third, withdrawing earnings early without understanding the ordering and five-year rules. Finally, don’t bank on a double-digit return assumption — modest inputs make sturdier plans. This calculator provides educational estimates only and is not financial or tax advice; consult a qualified professional about your situation.

Frequently Asked Questions