Medicare’s ability to pay for health care rests on two federal trust funds: the Hospital Insurance (HI) Trust Fund and the Supplementary Medical Insurance (SMI) Trust Fund. Both act as the government’s “wallet” for Medicare expenses, but they are financed differently.

How the Hospital Insurance Trust Fund Is Funded

The HI Trust Fund receives money primarily from payroll taxes, a portion of Social Security tax revenue, and a 3.8% surtax on investment income earned by high‑income individuals. As Ajay Patel, chair of finance and economics at Wake Forest University, notes, the fund stays solvent only when incoming revenues exceed the costs of paying Medicare benefits. Demographic shifts that reduce the ratio of working adults to retirees could cause the fund to run a deficit in a given year.

How the Supplementary Medical Insurance Trust Fund Is Funded

The SMI Trust Fund, which covers Medicare Part B and Part D, is financed through beneficiary premiums, congressional appropriations and interest earned on its investments. Patel says the SMI fund is not expected to run out of money because its revenue sources are adjusted each year to match projected expenses, and any shortfall can be addressed by premium changes or additional congressional funding.

Potential Risks and What Experts Advise

While the SMI fund is considered stable, the HI fund’s long‑term outlook is less certain. Brandon Hill, a senior financial advisor at Beckett Financial Group, warns that allowing the HI fund to become insolvent would be politically untenable. He recommends individuals consider supplemental options such as long‑term care insurance, retirement savings vehicles, short‑term home health plans, and hospital indemnity policies to protect against potential gaps in Medicare coverage.

Key Takeaways

• The Medicare Trust Fund consists of two separate funds with distinct revenue streams.
• HI funding relies on payroll taxes and a surtax on high‑income investment earnings.
• SMI funding comes from premiums, congressional appropriations, and investment interest.
• Demographic trends could pressure the HI fund’s solvency; policy adjustments may be required.
• Individuals can mitigate personal risk by exploring supplemental insurance and robust retirement savings.

Understanding these mechanisms helps beneficiaries anticipate potential changes and plan for a financially secure retirement.

Original reporting: Alexandria, VA News – WTOP News — read the source article.