How Much Tax Money Actually Goes to Healthcare?

In 2024, federal, state, and local governments spent roughly $2.5 trillion on healthcare, covering about 48 percent of the nation’s $5.3 trillion in total medical costs.¹ The federal share alone was about $1.9 trillion, roughly 27 percent of all federal outlays that year. So when you ask how much tax money goes to healthcare, the short answer is that close to half of every healthcare dollar spent in the United States starts as tax revenue, and healthcare consumes more than a quarter of the federal budget.

The money reaches patients and providers through a handful of large programs and a web of tax breaks. Some of it comes out of your paycheck labeled as Medicare tax. Most of it doesn’t.

The $1.9 Trillion Federal Health Budget

Federal health spending has grown fast. It was about $1 trillion in 2016 and reached roughly $1.8 trillion by 2025, with Medicare alone projected to hit about $1.1 trillion in fiscal year 2026.²

About 70 percent of that federal spending is mandatory. Congress has already written the eligibility rules and payment formulas into law, so the government pays whatever the programs cost regardless of the annual budget fight. The remaining 30 percent is discretionary and moves through appropriations bills every year, which is why agencies like the CDC and the Indian Health Service see their budgets swing more than Medicare or Medicaid do.

Where the Federal Health Dollars Actually Go

Medicare

Medicare is the single largest federal health program. Created under Title XVIII of the Social Security Act, it covers people 65 and older along with certain younger people with disabilities.³ Medicare spending was $1,118 billion in 2024, or 21 percent of all national health spending.¹

The parts are funded differently. Part A (hospital care) is paid primarily out of the Medicare payroll tax. Parts B (outpatient) and D (prescription drugs) draw most of their funding from general income tax revenue, not from a dedicated tax. That means a large share of Medicare comes from the same pool that funds defense, education, and everything else.

Medicaid and CHIP

Medicaid is a joint federal-state program under Title XIX of the Social Security Act that covers low-income individuals and families.⁴ Total Medicaid spending reached $919 billion in fiscal year 2024. The federal government covered about $584 billion, and states paid the rest. As of mid-2025, roughly 77.7 million people were enrolled in Medicaid and CHIP combined. Medicaid is also the country’s primary source of long-term care financing, covering nursing home costs that most private insurance won’t touch.

The federal share of each state’s Medicaid costs is set by the Federal Medical Assistance Percentage, a formula tied to state per-capita income.⁵ The floor is 50 percent for wealthier states; lower-income states can receive above 70 percent.

Veterans’ Healthcare

The Department of Veterans Affairs requested $165 billion in medical care funding for fiscal year 2026, up from the $141 billion enacted for 2025.⁶ Unlike Medicaid, VA healthcare is entirely federally funded with no state matching component.

NIH, CDC, and Indian Health Service

Discretionary health spending funds research and public health. The National Institutes of Health had a fiscal year 2026 budget of $47.2 billion. The CDC’s 2026 budget request was about $4.2 billion.⁷ The Indian Health Service received $8.05 billion for fiscal year 2026. Because these are discretionary, their funding can shift year to year with congressional priorities.

The Healthcare Tax on Your Paycheck

Under the Federal Insurance Contributions Act, employees pay 1.45 percent of gross wages toward Medicare’s Hospital Insurance Trust Fund, and employers match it.⁸ Self-employed workers pay both halves, for a total of 2.9 percent of net self-employment income.⁹ There is no wage cap on the Medicare tax the way there is on Social Security; every dollar you earn is subject to it.

Higher earners pay more. An additional 0.9 percent Medicare surtax applies to wages above $200,000 for single filers or $250,000 for married couples filing jointly.⁸ Employers don’t match it. A single filer earning $300,000 pays the surtax on the $100,000 above the threshold, or an extra $900. Self-employed people face the same surtax on income above those thresholds.⁹

A separate 3.8 percent tax hits net investment income (interest, dividends, capital gains, rental income, royalties) when modified adjusted gross income exceeds $200,000 for single filers, $250,000 for joint filers, or $125,000 for married filing separately.¹⁰ The tax applies to the lesser of net investment income or the amount by which your income exceeds the threshold. Together with the Additional Medicare Tax, this surtax was created in 2013 to pull more healthcare revenue from investment income and high wages.

The Bigger Source Nobody Sees: General Revenue

Here is what surprises most people. The single largest source of federal healthcare funding is not the Medicare payroll tax. It’s ordinary income tax revenue moving through the general fund. Medicare Parts B and D together draw roughly 70 percent or more of their funding from general revenues. Medicaid’s federal share comes entirely from general revenue. So do ACA marketplace subsidies, the VA, NIH, and CDC.

The healthcare taxes labeled on your pay stub are only a fraction of what you contribute. A significant share of federal income tax receipts flows to health programs through the annual appropriations process. You won’t see “healthcare” broken out on your 1040, but the money is there.

State and Local Health Spending

States carry a heavy load as Medicaid’s co-funders. Medicaid accounts for roughly 28.8 percent of total state spending when the federal dollars flowing through the program are included.¹¹ Looking only at state-funded dollars, Medicaid typically claims a larger share of state general funds than any category except elementary and secondary education. When enrollment surges during a downturn, state Medicaid costs rise automatically and squeeze other budget priorities.

Local governments add another layer. Property and sales taxes fund county health departments, public hospitals for uninsured residents, and emergency medical services. Some jurisdictions issue bonds to build public clinics in underserved areas. This local spending covers community-specific needs that federal and state programs aren’t built to handle.

Healthcare Subsidies Hidden in the Tax Code

Not all government healthcare spending appears as a budget line. Some of the largest subsidies come as tax breaks that reduce federal revenue.

The Employer-Sponsored Insurance Exclusion

The health insurance your employer provides is excluded from your taxable income. You pay no federal income tax or payroll tax on the premiums your employer contributes on your behalf. This exclusion is the single largest tax expenditure in the federal budget, costing an estimated $299 billion in foregone income and payroll tax revenue in 2022. Most workers benefit from it without realizing it exists.

The Medical Expense Deduction

If you itemize, you can deduct unreimbursed medical expenses that exceed 7.5 percent of your adjusted gross income.¹² For someone with $80,000 in AGI, only expenses above $6,000 count. The deduction primarily helps people with serious illness, major surgery, or expensive long-term care.

Health Savings Accounts

Workers enrolled in high-deductible health plans can contribute to an HSA, where money goes in tax-free, grows tax-free, and comes out tax-free when used for qualified medical expenses. For 2026, contributions are capped at $4,400 for individual coverage and $8,750 for family coverage, with an additional $1,000 catch-up for people 55 and older.¹³

The ACA Premium Tax Credit

Millions of people who buy insurance through the ACA marketplace receive a Premium Tax Credit that lowers monthly premiums. The credit is paid in advance to the insurer, so most people experience it as a reduced bill. The enhanced subsidies in place since 2021 expired on January 1, 2026. The maximum income limit for eligibility reverted to 400 percent of the federal poverty level, and the subsidies themselves became less generous.¹⁴

If you receive advance payments, you reconcile them on Form 8962 with your tax return.¹⁵ Starting with the 2026 tax year, there is no cap on the amount you can be required to repay if your actual income comes in higher than estimated.¹⁶ The prior repayment cap is gone, so accurate income estimates at enrollment matter more than they used to.

What Happens to Medicare Funding Next

The Medicare Hospital Insurance Trust Fund, which pays Part A benefits, is projected to cover 100 percent of scheduled benefits only until 2033.¹⁷ After that, incoming payroll tax revenue would be enough to pay about 89 percent of benefits. The program wouldn’t shut down, but without legislative action, Part A would face automatic benefit reductions or need additional funding.

Parts B and D face a different pressure. Because they draw primarily from general revenue, their growing costs don’t trigger a trust fund crisis; they crowd out other federal spending instead. Every additional dollar Medicare Part B absorbs from the general fund is a dollar unavailable elsewhere in the budget. The total amount of tax money flowing to healthcare will almost certainly keep climbing, pushed by an aging population, rising drug costs, and medical price inflation that consistently outpaces wages.

1
Centers for Medicare & Medicaid Services. NHE Fact Sheet
2
Committee for a Responsible Federal Budget. CBO Projects High Federal Health Program Costs
3
Social Security Administration. Social Security Act Title XVIII – Health Insurance for the Aged and Disabled
4
Social Security Administration. Social Security Act Title XIX – Grants to States for Medical Assistance Programs
5
U.S. Department of Health and Human Services. Federal Medical Assistance Percentages or Federal Financial Participation in State Assistance Expenditures
6
U.S. Department of Veterans Affairs. FY 2026 Budget in Brief
7
Centers for Disease Control and Prevention. FY 2026 CDC Congressional Justification
8
Office of the Law Revision Counsel. 26 U.S.C. 3101 – Rate of Tax
9
Office of the Law Revision Counsel. 26 U.S.C. 1401 – Rate of Tax
10
Office of the Law Revision Counsel. 26 U.S.C. 1411 – Net Investment Income Tax
11
Medicaid and CHIP Payment and Access Commission. Spending
12
Office of the Law Revision Counsel. 26 U.S.C. 213 – Medical, Dental, Etc., Expenses
13
Internal Revenue Service. Revenue Procedure 2025-19
14
Congressional Research Service. Enhanced Premium Tax Credit and 2026 Exchange Premiums
15
Internal Revenue Service. About Form 8962, Premium Tax Credit
16
Internal Revenue Service. Questions and Answers on the Premium Tax Credit
17
Social Security Administration. Status of the Social Security and Medicare Programs