Roth IRA Calculator 2025

High earners above the MAGI limits can still fund a Roth IRA through the backdoor Roth strategy. The process involves three steps: (1) contribute to a Traditional IRA (non-deductible if above the income limit), (2) convert the Traditional IRA balance to a Roth IRA, and (3) pay tax only on any gains between contribution and conversion. If converted immediately, the taxable amount is often $0 or near-zero.

A critical caveat is the pro-rata rule (IRC Section 408(d)(2)). If you hold any pre-tax IRA funds (Traditional, SEP, or SIMPLE IRA), the IRS treats all IRA balances as a single pool for conversion purposes. For example, if you have $93,000 in a pre-tax rollover IRA and $7,000 in a non-deductible Traditional IRA, only 7% of the conversion ($7,000 / $100,000) is tax-free. The remaining 93% is taxable. The workaround: roll pre-tax IRA balances into an employer 401(k) plan before executing the backdoor conversion.

A Roth conversion (converting Traditional IRA or 401(k) funds to Roth) triggers ordinary income tax on the converted amount. Converting $50,000 adds $50,000 to your taxable income for that year. Strategic conversions during low-income years — job transitions, early retirement before Social Security begins, or years with large deductions — can lock in a 12% or 22% rate on funds that would otherwise be taxed at 24%+ during RMD years. The 5-year rule applies to each conversion separately: converted amounts withdrawn within 5 years may incur the 10% early withdrawal penalty if under age 59 1/2.

The core difference: Traditional IRA contributions may be tax-deductible now, but withdrawals are taxed as ordinary income in retirement. Roth IRA contributions are after-tax, but qualified withdrawals — including all accumulated gains — are completely tax-free. Roth IRAs also have no Required Minimum Distributions (RMDs) during the original owner's lifetime, unlike Traditional IRAs which mandate withdrawals starting at age 73.

The Roth IRA 5-year rule states that earnings are only tax-free if the account has been open for at least 5 tax years and the withdrawal is after age 59 1/2, due to disability, for a first-time home purchase (up to $10,000 lifetime), or paid to a beneficiary after the owner's death. Contributions (not earnings) can always be withdrawn tax-free and penalty-free at any time, since they were made with after-tax dollars.

For a 30-year-old contributing $7,000 annually at 7% growth until age 65, the Roth IRA balance reaches approximately $1,030,000. In a Traditional IRA with the same inputs, the pre-tax balance is identical, but withdrawals at a 22% effective tax rate reduce the usable retirement funds to roughly $803,000 — a difference of over $227,000 in purchasing power.