Roth Conversions at 80: Smart Move or Adviser's Folly?

It seems bizarre — and the instinct to balk is sound. A couple in their 80s with $950,000 in traditional IRAs is already past the RMD starting line, drawing required distributions each year. An adviser pushing Roth conversions at this stage is not necessarily incompetent, but the strategy serves a very different master than the retiree's own bottom line.

The core math is unforgiving. At 80, the tax-free growth window is measured in a handful of years, not decades. Every dollar converted is taxed at today's marginal rate — on top of RMDs that are already flowing — while the eventual payoff accrues almost entirely to heirs, who inherit Roth assets free of income tax. If those heirs sit in lower brackets, the conversion is effectively a voluntary tax prepayment to the IRS with no compounding runway to justify it.

When the Adviser Is Right

There are narrow cases where the push makes sense: if the couple holds substantial cash outside the IRAs to pay the conversion tax without dipping into retirement funds, if heirs are in high tax brackets, or if the estate faces state inheritance complications. But for most 80-somethings, the hidden costs are decisive. A large conversion spikes modified adjusted gross income, triggering Medicare Part B and D IRMAA surcharges for two full years — a steep premium hike at exactly the age when healthcare spending tends to climb.

The adviser's pitch is really an estate-planning play dressed as tax strategy. The right question to ask is simple: who benefits? If the answer is the heirs, the couple should weigh that against their own liquidity, medical costs, and charitable giving — qualified charitable distributions already move IRA money out tax-free. A second opinion is cheap; an irreversible, tax-heavy conversion is not.