Roth IRA Calculator

Project your tax-free balance at retirement — and see how much the Roth wrapper saves compared with the same investing in a taxable account.

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2025 limit: $7,000 ($8,000 age 50+)
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For the taxable-account comparison

Please check the ages and amounts.

Tax-free balance at 65
Total contributed
Tax-free growth
Same plan, taxable account
Roth advantage

Why tax-free growth compounds differently

In a taxable account, taxes on dividends and gains skim a slice of every year's return, and that slice never gets to compound. In a Roth, the full return compounds every year and the IRS never takes a cut at the end:

Roth: full return compounds, withdrawals tax-free
Taxable (approx.): effective return ≈ return × (1 − tax rate)
Worked example

Age 30 → 65 · $10,000 start · $7,000/yr at 7%:

Roth balance ≈ $1.1M, all withdrawable tax-free. The same contributions in a taxable account (15% drag on returns) end near $890,000 — the wrapper alone is worth over $200,000.

Worked example — the cost of starting 15 years later

Same $7,000/yr at 7%, but starting at age 45 instead of 30, with $0 already saved, to the same retirement age of 65 (20 years instead of 35):

Future value of an annuity: FV = 7,000 × [(1.07²⁰ − 1) ÷ 0.07] = 7,000 × 40.995 ≈ $287,000. Total contributed over 20 years: $140,000, so growth accounts for about $147,000 of the total.

Compare that to the age-30 starter's ≈$1.1M: the 15-year head start is worth roughly $800,000 more at retirement, even though the late starter contributed the same $7,000 every year they participated — most of the gap is simply compounding having fewer years to work.

Common Roth IRA mistakes

2025 contribution limits and income rules

Rule (2025)Amount
Contribution limit (under 50)$7,000
Contribution limit (50+)$8,000
Single phase-out begins (MAGI)$150,000
Married filing jointly phase-out begins$236,000

Above the phase-out, the "backdoor Roth" (nondeductible traditional contribution converted to Roth) remains a standard, legal workaround — mind the pro-rata rule if you hold pre-tax IRA money. Roths also skip required minimum distributions entirely, making them the best account to inherit and the last one to spend. Sequence-wise, most planners put Roth contributions right after capturing the 401(k) match. See the accumulation big picture in the retirement calculator.

Frequently asked questions

How much can I contribute to a Roth IRA?

2025: $7,000/yr ($8,000 at 50+), phasing out from $150k MAGI single / $236k joint. Backdoor conversions may work above that.

Why is a Roth IRA so powerful?

All growth is tax-free at withdrawal; $7,000/yr for 30 years at 7% ≈ $660,000 with zero owed. Contributions stay accessible penalty-free.

Roth IRA or traditional IRA?

Roth if your retirement tax rate will match or beat today's; traditional at peak brackets. Roth's no-RMD flexibility is a strong tiebreaker.

Can I withdraw my contributions before retirement?

Yes — contributions (already taxed) can be withdrawn anytime, tax- and penalty-free. Only early withdrawal of earnings risks tax and a 10% penalty.

What is the Roth IRA 5-year rule?

Tax-free earnings withdrawal needs both age 59½+ and 5 years since opening the account; each conversion also has its own separate 5-year clock.

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Note: Limits and phase-outs are for tax year 2025 and change annually; the taxable comparison is approximate. Not financial or tax advice. Last reviewed: September 2026.