The Year Her Mother Went Into Care, She Converted $180,000 of the IRA to a Roth, and the Nursing Home Bills Erased the Entire Tax

The Year Her Mother Went Into Care, She Converted $180,000 of the IRA to a Roth, and the Nursing Home Bills Erased the Entire Tax

David Beren

Fri, August 28, 2026 at 11:53 PM GMT+3 6 min read

Quick Read

• Nursing home bills can wipe out the tax on a Roth conversion when both occur in the same year, because deductible medical costs above 7.5% of AGI offset conversion income.

• The strategy requires itemizing deductions and works only when the IRA owner and the patient are the same person, a spouse, or a qualifying dependent.

• Each converted dollar raises AGI, lifting the 7.5% deduction floor, and a larger MAGI can trigger IRMAA Medicare surcharges two years later.

• Read More: Learn 7 ways to generate income with a $1,000,000+ portfolio (sponsor)

If you have a traditional IRA and someone in your household faces catastrophic nursing home bills, a tax interaction exists. A Roth conversion executed in the same year as enormous deductible medical costs can move IRA dollars into a Roth at a fraction of their normal tax cost, because the medical expense itemized deduction absorbs the taxable income the conversion generates. The strategy pairs two ordinary tools most people use separately, and the window closes at year-end.

Here is how the mechanism works in practice. A Roth conversion, which moves money from a pre-tax traditional IRA into a Roth IRA, adds the converted dollars to your taxable income for that year. Qualified medical expenses, including long-term care and nursing home costs when the care is primarily medical, are deductible on Schedule A to the extent they exceed 7.5% of your adjusted gross income. In a year when someone spends a full year in a skilled nursing facility, that deduction can be enormous. Layer a large conversion into the same calendar year, and the deduction can absorb a substantial chunk of the tax bill on that conversion.

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Where the Rule Lives

The medical expense deduction and its AGI floor sit in Internal Revenue Code §213. What counts as a deductible medical expense, including nursing home care, is spelled out in IRS Publication 502. Publication 502 draws a hard line: if the resident is in the facility mainly to receive medical care, the full cost, including lodging and meals, counts as a medical expense. If the resident is there chiefly for personal or custodial reasons (help with bathing, dressing, and daily living rather than medical treatment), only the portion attributable to medical care qualifies. Custodial care alone generally does not clear the bar.

Who Can Actually Use This

Itemizing is required to benefit. The 2026 standard deduction is $32,200 for married couples filing jointly, $16,100 for single filers and married individuals filing separately, and $24,150 for heads of household under the One Big Beautiful Bill adjustments. If total itemized deductions do not exceed those numbers, the medical deduction adds nothing. Retirees who default to the standard deduction routinely miss this.

Whose bills and whose IRA are paying them matters a lot. To deduct another person's medical expenses, that person has to be your spouse or a dependent, which can include a qualifying relative, like a parent, under the multiple support rules. An adult child generally cannot deduct a parent's nursing home costs unless that parent meets the dependent test. When the same person owns the IRA and incurs the medical bills, the strategy works directly. But when the IRA belongs to the child and the bills belong to the parent, the strategy usually does not work at all.

How the $180,000 Offset Works in Practice

Here is how it actually played out for "Sarah." She stepped in to cover $130,000 in qualifying medical costs for her mother, who was in a skilled nursing facility. By claiming her mother as an eligible dependent under the IRS multiple-support rules, she unlocked a tax shelter that most people never even know exists. On top of her baseline $70,000 salary, she executed a $180,000 traditional-to-Roth conversion. That pushed her AGI to $250,000 and established an $18,750 medical deduction floor, which is 7.5% of AGI. That left her with $111,250 in deductible medical expenses, the $130,000 minus that $18,750 floor. Combine that with standard SALT and other itemized deductions, and she effectively neutralized the entire taxable surge from the conversion. As a result, her IRA balance moved permanently into tax-free territory.

Running the Play in 2026

The 2026 brackets, per Revenue Procedure 2025-32, run 10%, 12%, 22%, 24%, 32%, 35%, and 37%, with the top rate hitting single incomes above $640,600 and joint incomes above $768,700. The mechanics generally look like this:

1. Estimate qualified medical costs for the year, including nursing home charges that meet the Publication 502 standard.

2. Project AGI without a conversion, then add the planned conversion. Apply the 7.5% floor to the new, higher AGI.

3. Size the conversion so that the deductible medical amount, plus other itemized items (state and local taxes, charitable gifts), absorbs most of the taxable conversion income.

4. Complete the conversion at the custodian before December 31. Roth conversions cannot be recharacterized; the year-end deadline is firm.

5. File Schedule A with Form 8606 for the conversion.

Traps to Price In

The AGI floor moves as you convert. Each dollar you convert raises your AGI, which in turn raises the threshold your medical costs have to clear before anything becomes deductible. So the offset is not as clean as it looks on paper.

The conversion also raises modified adjusted gross income (MAGI), and Medicare uses a two-year lookback for the income-related monthly adjustment amount (IRMAA). A 2026 conversion feeds 2028 Medicare premiums. For 2026, IRMAA begins at MAGI above $109,000 for individual filers and $218,000 for joint filers, and the top tier pushes the total Part B premium to $689.90 per month at MAGI of $500,000 or more for individuals and $750,000 or more for joint filers.

Medicaid planning is a separate issue. A conversion turns a pre-tax asset into a Roth asset, but the balance remains countable in most states, and state transfer lookback rules still apply. A high-medical-cost year is one version of a low-tax conversion window, and we sized up the more common one, the quiet years between the last paycheck and the first RMD, in a free Roth conversion guide. Given the timing sensitivity and the interaction with IRMAA, dependency status, and Medicaid, a review of the numbers with a CPA and an elder law attorney, where nursing home eligibility is in play, is typically warranted before execution.

A $1,000,000 Income Portfolio

If you've saved over $1,000,000, this guide is for you. The last thing you want in retirement is to run out of money, you want your money to generate lasting income while you enjoy your life.

Now you can learn the strategies wealthy retirees use to fund their retirement with The Definitive Guide to Retirement Income from Fisher Investments. Download the guide today! (sponsor)

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