Updated August 2, 2026. Quick answer: you can deduct medical and care costs you pay for a parent even if you cannot claim them as a dependent. The medical deduction applies the dependency definition with the income test switched off. Provide more than half their support and their medical costs are yours to deduct, whatever their income was. At memory-care prices this is frequently the largest deduction on the return, and it is routinely missed.
The exact words that do it
Section 213 allows a deduction for medical expenses paid
“for a dependent (as defined in section 152, determined without regard to subsections (b)(1), (b)(2), and (d)(1)(B) thereof)”
26 U.S.C. 213(a)
Subsection (d)(1)(B) is the gross income test — the $5,300 limit for 2026. Section 213 instructs you to apply the dependency rules while ignoring it. The IRS says the same thing in plain words in Publication 502: you can include medical expenses for someone who “would have been your dependent except that” they had too much gross income, or filed a joint return.
So the support test still has to be met. The income test does not.
What that is worth at real prices
Take a parent with $22,000 of income — a pension and Social Security, comfortably over the limit, so no dependency claim and no $500 credit. You cover $40,000 of their $60,000 annual support, which is more than half. You pay $45,000 of their care costs, and your income is $150,000.
The floor is 7.5% of your income, or $11,250. Everything above it counts: $33,750 of deduction, on a parent you are not allowed to claim. That is the provision, and it is worth considerably more than the credit you did not get.
What counts, and the item people miss
Nursing-home and assisted-living costs count in full, including meals and lodging, where the person is there principally for medical care. Where they are not, only the medical component counts. That distinction is doing enormous work in a memory-care bill and is worth getting a written breakdown from the facility rather than guessing.
Also countable and routinely forgotten: mileage driving them to appointments, insurance premiums you pay on their behalf, dental and vision, and equipment. Long-term-care insurance premiums count too, subject to their own age-based annual caps.
Two conditions that decide whether it helps you at all
You have to itemise. A large standard deduction means many people who qualify get nothing. Care costs of this size are one of the few things that reliably push a return back into itemising, so it is worth running both ways rather than assuming.
The floor is 7.5% of your income, permanently. Not a temporary rate — the sunset that used to sit above it was removed. Higher income, higher floor: at $200,000 of income you need more than $15,000 of costs before anything counts.
If siblings are sharing the cost
The same multiple-support logic applies: where no one pays half but together you do, the sibling designated under a written agreement is the one who can treat the parent as a dependent for this purpose. Only one of you gets it in a given year, and it is worth doing the arithmetic on which of you — the sibling with the lower income has the lower floor and may extract more from the same costs. Run both of you through the calculator before deciding who claims.
Related
Where the money for care comes from is the larger question this sits inside. If a family member is being paid to provide the care, the agreement needs to exist before the money moves. And if Medicaid is likely to be part of the picture eventually, transfers inside the look-back have a calculable cost.
The carve-out from 26 U.S.C. § 213(a); the plain-language version from IRS Publication 502 (2025 edition, which states the 2025 figure); the 7.5% floor from § 213(a); dependency tests from § 152(d). The 2026 gross-income limit of $5,300 is from Revenue Procedure 2025-32. Read August 2026. General information, not tax advice. Dependency and support determinations turn on facts no article can see, and the amounts are indexed annually.
The other route for the same money. Care costs that do not work as a medical deduction may work as a credit, under completely different tests — the dependent care credit for elder care.