Senate Bill Caps Medicare Out-of-Pocket Costs

Democratic senators introduced the Medicare Cost Cap Act on June 25, 2026 — a bill designed to protect traditional Medicare beneficiaries from unlimited out-of-pocket medical expenses. For millions of seniors, rising cost-sharing under Parts A and B has long created financial hardship. This legislation directly addresses that gap.

What Is the Medicare Cost Cap Act?

The Medicare Cost Cap Act proposes a hard annual limit on what traditional Medicare enrollees pay in cost-sharing. Starting in 2028, beneficiaries would face a maximum of $5,000 per year in combined Parts A and B expenses — covering deductibles, copays, and coinsurance.

Once a beneficiary reaches that threshold, Medicare covers 100% of all additional covered costs for the remainder of the year. Moreover, the cap adjusts annually based on per capita Medicare spending growth, so it stays aligned with real healthcare cost trends over time.

This is a significant departure from current traditional Medicare, which has no out-of-pocket maximum — a gap that leaves many enrollees vulnerable to catastrophic medical bills.

Key Provisions of the $5,000 Annual Cap

The bill’s core mechanism is straightforward, but several details shape how it works in practice:

Annual cap amount: $5,000 for combined Parts A and B cost-sharing starting in 2028.

100% coverage trigger: Once the cap is reached, Medicare pays all covered costs for the rest of that calendar year.

Inflation adjustment: The cap rises each year in line with per capita Medicare spending growth, preventing the limit from becoming outdated.

No funding mechanism specified: The bill currently does not outline how Congress would pay for the additional federal spending it requires.

Analysts at Brown University’s School of Public Health estimate the cap could cost the federal government at least $50 billion per year. This raises immediate questions about fiscal sustainability — especially given that Medicare’s Hospital Insurance Trust Fund, which finances Part A, faces a projected funding shortfall by 2033.

Low-Income Subsidy Expansion Under the Bill

Beyond the cap itself, the legislation expands two key safety net programs for Medicare’s most financially vulnerable enrollees.

Raising the Income Eligibility Threshold

Also starting in 2028, the bill aligns income eligibility for the low-income subsidy (LIS) and Medicare Savings Programs (MSPs) at 200% of the federal poverty level. Currently, these thresholds vary and leave many low-income seniors without adequate support.

Eliminating the Resource Ceiling

The bill also eliminates a resource ceiling that currently disqualifies some beneficiaries from receiving assistance. Assets — not just income — can block seniors from qualifying today. Removing this barrier could open eligibility to a broader population.

Automatic Dual Enrollment

Additionally, the bill establishes two-way automatic eligibility recognition between the LIS and MSP programs. Seniors who qualify for one program would automatically enroll in the other, reducing the administrative burden that causes many eligible beneficiaries to miss out on benefits they are entitled to receive.

How Many Beneficiaries Benefit — and at What Cost?

A Senate Finance Committee release accompanying the bill provided clear projections:

• Over a 10-year period, more than 52% of Medicare beneficiaries are expected to exceed the $5,000 cap at least once.
• Enrollees would save an estimated $1,024 per year on average.
• In 2028 alone, approximately 3.2 million Medicare beneficiaries would directly benefit from the cap.

These figures highlight the scale of unmet need in traditional Medicare. More than half of enrollees face catastrophic cost exposure over any given decade — a gap that Medicare Advantage plans currently address through their own out-of-pocket limits, but traditional Medicare does not.

Context: Existing Medicare Out-of-Pocket Limits

It helps to place this proposal within the broader Medicare landscape.

Medicare Advantage vs. Traditional Medicare

Medicare Advantage plans already carry a federally mandated out-of-pocket maximum — currently up to $9,250 for in-network services annually. Individual plans can set their caps lower. Traditional Medicare, by contrast, has no such limit, creating a structural inequity between the two coverage paths.

Part D Drug Cost Cap Already in Effect

Separately, a $2,100 annual cap on out-of-pocket prescription drug costs for Part D beneficiaries took effect in 2026. Congress set a $2,000 cap for 2025, with the limit adjustable each year based on drug spending trends — the same framework this bill now proposes for Parts A and B.

The Medicare Cost Cap Act would extend similar financial protection to medical services, not just drugs.

What This Means for Payers and Health Plans

For payer executives, this legislation carries both policy and market implications.

Traditional Medicare enrollees gaining a defined cost ceiling could affect plan switching decisions. If Congress passes the cap, some beneficiaries who currently choose Medicare Advantage specifically for its out-of-pocket protections may reconsider their coverage options. Payers should watch how this bill progresses — and model its potential impact on their Medicare Advantage membership.

Furthermore, expanded low-income subsidy eligibility could shift the dual-eligible population mix, affecting both plan revenues and care management needs.

The bill still faces significant legislative hurdles, including the unresolved question of how to fund $50 billion or more in annual federal costs. Nevertheless, it signals continued congressional focus on closing the financial protection gap in traditional Medicare.