This explains the costs and the coverage gaps; it is not financial or medical advice.
A price tag like no other
Among America's most expensive illnesses, one stands apart. Dementia — the family of brain disorders led by Alzheimer's disease — is projected to cost the United States about $384 billion in direct health care, long-term care and hospice in 2025, according to the Alzheimer's Association's annual Facts and Figures report. Count the unpaid work of family caregivers, and the total economic burden runs far higher — the USC Schaeffer Center estimates roughly $781 billion in 2025, rising to about $818 billion in 2026.
The disease isn't necessarily deadlier than cancer or heart disease. It's more expensive — because it lasts longer and demands a kind of care most insurance was never built to fund.
Why dementia costs so much
Alzheimer's progresses slowly, often over eight to twenty years, gradually stripping a person of the ability to manage money, cook, drive, bathe and finally to recognize family. That creates a long, relentless need for custodial care — help with daily living — rather than a single surgery or course of treatment.
The scale is growing. About 7.2 million Americans aged 65 and older are living with Alzheimer's dementia today, the Alzheimer's Association reports, a number that could reach roughly 13.8 million by 2060 as the population ages. Because the care is mostly personal rather than clinical, the costs pile up in exactly the places insurance covers least.
The hidden workforce
The single biggest cost never shows up on a hospital bill. In 2025, nearly 12 million family members and friends provided an estimated 19.2 billion hours of unpaid care to people with dementia — labor the Alzheimer's Association values at more than $413 billion a year. "Unpaid caregiving" means the spouses and adult children who manage medications, appointments and round-the-clock supervision, usually for free and often while holding down their own jobs. The USC team estimates those caregivers give up billions of dollars in earnings annually as a direct result.
The coverage gap families hit first
For most families, the financial shock lands the moment they read the fine print of their insurance.
Medicare — the federal program for those 65 and older — covers doctor visits, hospital stays and limited short-term skilled nursing. It does not cover ongoing custodial long-term care, and it does not pay for memory-care residences, the specialized facilities offering 24/7 supervision. That is the very care dementia demands most.
Medicaid — the state-federal program for people with low income and few assets — does cover nursing-home care, including for dementia. But to qualify, most people must first spend down nearly all of their savings. Families can end up choosing between preserving a lifetime of assets and getting a parent or spouse the care they need. Out-of-pocket spending by patients and families ran to tens of billions of dollars in 2025, on top of the Medicare and Medicaid share, per the USC model.
What families can do
Financial planners increasingly treat dementia risk as a core retirement question. The main tools:
- Long-term care insurance covers the custodial care Medicare skips. Premiums are far cheaper bought in one's 50s, before health problems make coverage costly or unavailable; many insurers now sell "hybrid" policies that bolt a long-term-care benefit onto life insurance or an annuity.
- Health savings accounts (HSAs), available with high-deductible health plans, can be invested and saved tax-advantaged for future care costs.
- Early legal planning — durable powers of attorney and health-care proxies put in place before cognitive decline — is critical. Once a person loses the capacity to make decisions, families may face slow, costly court guardianship instead.
The disease itself may be unavoidable for millions of households. The financial damage that so often follows it is, at least in part, something planning can soften — but only if the planning starts early, while there is still time and capacity to do it.
