Overview
- Fidelity’s updated wealth-management guidance calls the RMD cascade a major planning risk and urges retirees to model multi-year income well before distributions begin.
- An RMD is taxed as ordinary income and can push more Social Security benefits into the taxable base, which raises the effective tax on each withdrawn dollar.
- Higher reported income from RMDs also triggers Medicare’s income-related monthly adjustment amounts, with CMS setting 2026 thresholds at $109,000 for singles and $218,000 for couples.
- Fidelity and advisers recommend specific fixes: staged Roth conversions to shrink future RMDs, moving up to $210,000 into a QLAC to remove it from RMD calculations, or redirecting unneeded distributions into tax-efficient taxable investments.
- The practical stakes are real for many retirees: missed RMDs carry large penalties, small extra withdrawals can produce outsized marginal tax hits in examples cited by planners, and households with seven-figure accounts should weigh timing and sequencing now to avoid much higher lifetime tax and premium costs.