# The Roth conversion trap most advisors ignore

> A couple can convert $47,500 tax-free this year, but one overlooked calculation reveals it might not save them anything.
- Title: The Roth conversion trap most advisors ignore · 24/7 Wall St.
- Summary: A couple can convert $47,500 tax-free this year, but one overlooked calculation reveals it might not save them anything. Before converting to a Roth…
- Keywords: roth conversion, retirement planning, tax strategy, required minimum distributions, medicare premiums, irmaa, traditional ira, social security, tax brackets, financial planning, Roth, conversion
- Source: 24/7 Wall St. — https://247wallst.com/personal-finance/2026/09/19/a-65-year-old-couple-with-380000-can-convert-47500-tax-free-this-year-whether-they-should-depends-on-a-number-most-conversion-advice-never-mentions
- Author: David Beren
- Published: 2026-09-19T14:29:33+00:00
- Read time: 2 min
- Topics: roth conversion, retirement planning, tax strategy, required minimum distributions, medicare premiums, irmaa, traditional ira, social security, tax brackets, financial planning
## The zero-tax conversion window
A 65-year-old couple can convert $47,500 to a Roth with zero federal tax in 2026 by filling their standard deduction and age-based deductions. This rare low-income window happens between retirement and required distributions.
## How the math works for 2026
The standard deduction for married couples is $32,200, plus additional amounts for both spouses age 65 and the new senior deduction. Combined, this creates a $47,500 deductible layer that can be filled with a conversion at zero tax.
## The calculation advisors skip
Most conversion advice ignores the critical question: what will their required minimum distribution actually be? At $380,000, this couple's first RMD at age 75 under SECURE 2.0 rules won't push them into higher tax brackets.

> If the required distribution arrives inside the low brackets anyway, converting now to avoid a bracket that will never appear saves very little.
## The RMD plus Social Security test
With a $380,000 IRA and plausible Social Security benefits, this couple's household income stays well below the 22% tax bracket threshold of $100,800 in early distribution years. Converting to avoid a bracket they'll never reach saves nothing.
## Medicare premiums are the hidden cost
A 2026 conversion affects 2028 Medicare premiums through income-related monthly adjustment amounts. The first IRMAA tier begins at modified adjusted gross income above $218,000, and a conversion can push more Social Security into the taxable share.
## Conversion is permanent and costly
Recharacterization was eliminated in 2017, so conversion cannot be undone. Paying taxes from outside the IRA is essential, and several states tax conversions fully with no offsetting deduction.
## When converting actually makes sense
Converting pays off if one spouse will likely outlive the other by many years and face higher single-filer brackets, or if non-spouse heirs will inherit and must empty the account within 10 years during their peak earning years.
## The verdict for this couple
For a healthy 65-year-old couple with $380,000, no other income sources, and no non-spouse heirs, converting is motion without payoff. Their projected RMD plus Social Security stays in the 12% bracket.

> For a healthy 65-year-old couple with $380,000, no meaningful other income sources, and no plan to leave the account to non-spouse heirs, filling deductions with a conversion is motion without payoff.
## Run this one number first
Before converting, add your projected first-year required distribution to your expected Social Security income. If that total stays comfortably below $100,800, the conversion is solving a problem that won't exist.
## Key takeaway

Before converting to a Roth, calculate your projected required minimum distribution plus Social Security income. If that total stays in the 12% tax bracket, converting now solves a problem that won't actually exist.