Quick answer: A backdoor Roth IRA is a two-step legal maneuver: contribute to a Traditional IRA (which has no income limit for contributions), then convert it to a Roth IRA – used by higher earners who exceed the direct Roth IRA income limits, but it requires careful handling of the pro-rata rule if you hold other pre-tax IRA money.

Why the strategy exists

Direct Roth IRA contributions phase out at higher income levels under IRS rules, but there is no income limit on making a nondeductible Traditional IRA contribution or on converting Traditional IRA funds to a Roth IRA – the backdoor strategy uses these two separate rules together.

The real complication most videos skip

The IRS pro-rata rule (IRC Section 408(d)(2)) treats all your Traditional, SEP, and SIMPLE IRA balances as one pool when calculating the taxable portion of a conversion – if you have existing pre-tax IRA money, part of your ‘backdoor’ conversion will be taxable, not tax-free as often implied.

Frequently Asked Questions

Is the backdoor Roth IRA legal?

Yes – the IRS has acknowledged the strategy is permissible; it uses existing contribution and conversion rules rather than any loophole outside the law.

Where can I read the official IRS rules on IRA conversions?

IRS Publication 590-A and 590-B cover Traditional IRA contributions and Roth conversions at irs.gov.

Source: IRS Publication 590-A: Contributions to IRAs

Written by Samuel, Certified Public Accountant. Published August 2026. Last updated: August 2026.