Backdoor Roth IRA

The backdoor Roth IRA is not a special account type — it is a two-step process exploiting the fact that while direct Roth IRA contributions phase out above certain income levels, there is no income limit on Roth conversions. High earners who cannot contribute to a Roth IRA directly use this maneuver to achieve the same tax-free retirement savings outcome.

The mechanics are straightforward. Step one: make a non-deductible contribution to a Traditional IRA (up to $7,000 in 2025, or $8,000 if 50+). Because no deduction is taken, the contribution has a cost basis of $7,000. Step two: convert the Traditional IRA to a Roth IRA. If done promptly before any earnings accumulate, the conversion is nearly tax-free — you owe tax only on any growth between the contribution and conversion dates, which is typically pennies if done quickly.

The 'pro-rata rule' is the critical complication. If you hold other pre-tax IRA assets (in a Traditional, SEP, or SIMPLE IRA) at year-end, the IRS treats all your IRAs as one pool when calculating the taxable portion of a conversion. For example, if you have $93,000 of pre-tax IRA money and make a $7,000 non-deductible contribution, your total IRA balance is $100,000 and only 7% ($7,000/$100,000) of any conversion is tax-free. To neutralize the pro-rata rule, many individuals roll their pre-tax IRA assets into their employer's 401(k) plan before executing the backdoor strategy — not all plans accept such rollovers, so checking with the plan administrator first is essential.

Each backdoor conversion creates its own five-year clock for penalty-free access to the converted principal (though account holders over 59½ need not worry about the penalty). The strategy must be reported to the IRS via Form 8606 each year a non-deductible contribution is made and each year a conversion occurs. Despite its somewhat provocative name, the backdoor Roth IRA has been explicitly acknowledged as legal by Congress and Treasury.