Roth Conversions 2026: When the Tax Hit Pays Off
Converting a traditional IRA or 401(k) to a Roth account means paying income tax now to enjoy tax-free withdrawals later. The math behind a smart Roth conversion is anything but simple. The right conversion in the right year saves tens of thousands in lifetime taxes. The wrong one just accelerates a bill for no benefit. The One Big Beautiful Bill Act made the TCJA rate structure permanent — no more 2025 sunset cliff. That killed the urgency argument ("convert now before rates rise"), but it didn't kill Roth conversions. The real case was always about bracket management, RMD avoidance, and IRMAA planning. With the fed funds rate at 3.64%, the 10-year Treasury at 4.31%, and the S&P 500 at $656.86 (6% below its 52-week high of $697.84), the conversion calculus has a new wrinkle: tariff-driven market volatility means depressed portfolio values — and lower conversion tax bills on the same number of shares. Here's how to figure out whether a Roth conversion makes sense for you in 2026, how much to convert, and the traps that catch people who skip the math.