The Strategy of IRA-to-Roth Conversions

An IRA-to-Roth conversion is the process of moving assets from a pre-tax retirement account, such as a Traditional IRA, into a Roth IRA. This maneuver is a foundational tool for tax planning in 2026, as it allows you to trade a certain tax bill today for the promise of tax-free growth and tax-free withdrawals in the future. Because there are no income limits on who can perform a conversion, this strategy is open to all taxpayers, regardless of whether their income exceeds the thresholds for direct Roth IRA contributions.

The primary cost of a conversion is that the amount moved is treated as ordinary taxable income in the year the transfer occurs. If you convert $50,000 from a Traditional IRA to a Roth IRA, that $50,000 is added to your other earnings, which could potentially push you into a higher tax bracket. For the 2026 tax year, with the permanent tax rates established by recent legislation (including the “OBBBA”), investors must carefully evaluate whether paying taxes now at their current rate is more advantageous than paying them later in retirement, especially if they expect future tax rates to rise.

A critical complexity in this process is the “Pro-Rata Rule,” which prevents you from converting only the non-deductible (after-tax) portions of your IRA. The IRS views all of your non-Roth IRAs—including SEP and SIMPLE IRAs—as a single combined pool of money. If your total IRA balance is 90 percent pre-tax and 10 percent after-tax, any conversion you perform must consist of 90 percent taxable funds and 10 percent tax-free funds. To avoid this “surprise” tax bill, many 2026 investors utilize a “Reverse Rollover,” moving their pre-tax IRA funds into a workplace 401(k) to isolate their after-tax dollars for a “clean” conversion.

The “Backdoor Roth IRA” is a specific application of the conversion rule used by high earners who are phased out of direct Roth contributions. In 2026, the income phase-out starts at $153,000 for singles and $242,000 for married couples filing jointly. By making a non-deductible contribution to a Traditional IRA ($7,500, or $8,600 if age 50+) and then immediately converting it to a Roth IRA, these individuals can legally bypass the income caps. This two-step process must be reported on IRS Form 8606 to track the “basis” of the non-deductible contribution and ensure the conversion is handled correctly for tax purposes.

Beyond the immediate tax impact, conversions also trigger the “Five-Year Rule,” which requires each converted amount to stay in the Roth IRA for at least five years before the principal can be withdrawn penalty-free if you are under age 59½. Furthermore, for retirees over age 73, any Required Minimum Distributions (RMDs) must be taken before a conversion can be performed, as an RMD itself cannot be converted. Despite these hurdles, the 2026 landscape offers new opportunities, such as the ability for federal employees to perform in-plan Roth conversions within the Thrift Savings Plan (TSP), further expanding the tools available for building tax-free retirement wealth.

Source: Internal Revenue Service (IRS), “Roth IRA Conversions” and Publication 590-A; SECURE 2.0 Act of 2022; and Fidelity Investments, “Tax Deductions and Roth Conversions” (2026 Update).