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Affordable Care Act

The ACA MarketplaceS

Change in February effectuated enrollment, by state, 2025-2026

How Has ACA Marketplace Enrollment Changed Across States in 2026?

ACA Marketplace enrollment fell this year in every state except New Mexico, which was the only state to fully replace the enhanced premium tax credits that expired last year with a state-funded subsidy, according to a new KFF analysis of effectuated enrollment data. The Marketplace enrollment decline—the first in seven years—follows several years of rapid enrollment growth and coincides with the end of the enhanced federal subsidies.

How Much and Why ACA Marketplace Premiums Are Going Up in 2027

ACA Marketplaces insurers are proposing a median premium increase of 15% in 2027, according to KFF’s updated analysis of 276 insurers with publicly available filings across all 50 states and the District of Columbia. This is the second consecutive year of double-digit premium hikes. Last year’s median nationwide proposed rate change was 18%, and the median finalized rate change was 20%. While this proposed rate change is lower than last year, it represents the second-highest requested rate change since 2018, as premium growth had been relatively flat in this market for several years.

About the ACA

Promotional image for KFF video How Affordable is the Affordable Care Act

Did the Affordable Care Act Make Health Care More Affordable?

The expiration of the ACA’s enhanced premium tax credits at the start of 2026, combined with rising insurer premiums, put a spotlight on health care affordability that extends beyond Marketplace enrollees. KFF’s Cynthia Cox examines the ACA’s record and the broader underlying question it raises: what’s a fair price for Americans people to pay for health care?

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  • How Popular is the Idea of Repealing Health Reform?

    Poll Finding

    With a number of this fall’s candidates for public office advocating an overturn of the new health reform law, this Data Note takes a closer look at the variety of polls that have attempted to measure the public’s support for repeal. Data Note (.pdf) For an updated look on Americans' views on repealing the Affordable Care Act, see: The Public, Health Care Reform, and Views on Repeal January 2011

  • State Budgets Under Federal Health Reform: The Extent and Causes of Variations in Estimated Impacts

    Issue Brief

    This analysis examines the potential costs and savings that the health reform law may generate for state budgets, a topic of great interest at a time when states continue to struggle with tight budgets in the wake of the recession. The analysis seeks to explain why recent state estimates of the likely impact of health reform on their budgets vary widely, and discusses the major expected sources of costs and savings as the new law…

  • Connecting Eligible Immigrant Families to Health Coverage and Care: Key Lessons from Outreach and Enrollment Workers

    Issue Brief

    Beginning in 2014, health coverage options will significantly expand under health reform through an expansion in Medicaid eligibility and by making tax credits available to help individuals purchase coverage through new Health Benefit Exchanges. Given their high uninsured rate and limited access to private and public coverage, one group who could significantly benefit from this coverage expansion is lawfully residing immigrant families. However, it will be important to address barriers eligible immigrant families often face…

  • Financial Alignment Models for Dual Eligibles: An Update

    Issue Brief

    The nearly nine million dual eligibles who receive both Medicare and Medicaid benefits are a high cost, high need population, accounting for a disproportionate share of expenditures relative to their enrollment in both programs. In April 2011, the Centers for Medicare and Medicaid Services (CMS) announced the award of design contracts to 15 states to develop service delivery and payment models to integrate care for dual eligibles. CMS and the participating states have recognized that…

  • The Cost and Coverage Implications of the ACA Medicaid Expansion: National and State-by-State Analysis

    Report

    A central goal of the Patient Protection and Affordable Care Act (ACA) is to significantly reduce the number of uninsured by providing a continuum of affordable coverage options through Medicaid and new Health Insurance Exchanges. Following the June 2012 Supreme Court decision, states face a decision about whether to adopt the Medicaid expansion. These decisions will have enormous consequences for health coverage for the low-income population. This analysis uses the Urban Institute’s Health Insurance Policy…

  • Addressing Disparities in Health and Health Care — Issues for Reform

    Event

    Marsha Lillie-Blanton, Dr.P.H., Kaiser senior advisor on race, ethnicity and health care, testified before the House Ways and Means Health Subcommittee about the role of health insurance in reducing disparities in health care and in health status. The testimony is part of an ongoing health reform hearing series. Testimony (.pdf) Slides (.ppt)

  • The Decline in the Uninsured in 2007: Why Did It Happen and Can It Last?

    Issue Brief

    This policy brief examines the underlying shifts in health insurance coverage in 2007, which resulted in a 1.5 million decrease in the number of uninsured people under age 65, due to increased public coverage. This includes about 300,000 in Massachusetts, which implemented its comprehensive health reform that year. The brief also projects that the current economic downturn and rising unemployment rate likely will cause the number of uninsured to grow by at least 2 million…

  • Health Affairs Article: Beyond Incrementalism? SCHIP and the Politics of Health Reform

    Report

    This article examines the political and legislative history of the Children's Health Insurance Program and analyzes the lessons for policymakers who are contemplating broader health care reform. It was published online in the journal Health Affairs and was authored by Jonathan Oberlander, an associate professor, social medicine and health policy and management, at the University of North Carolina at Chapel Hill, and Barbara Lyons, a vice president of the Kaiser Family Foundation and deputy director…

  • Pulling it Together: The Health Care Industry’s Second Voluntary Effort

    Perspective

    The announcement that health care industry groups plan to put on the table voluntarily a package of proposals to shave $2 trillion off the rate of increase in health spending over the next ten years immediately conjures up the image of the Voluntary Effort or VE launched with similar fanfare in the Carter administration.  Back then the industry used the VE to fend off Jimmy Carter's efforts to aggressively control the costs of hospital care…

  • Explaining Health Care Reform: What is Health Insurance?

    Issue Brief

    A key element in any comprehensive health reform plan is defining what health insurance is and the amount of insurance coverage people will have. There are two components to that coverage: the types of services covered (e.g., physician care, hospitalization, prescription drugs, etc.), and the cost sharing required of enrollees (e.g., the annual deductible, the copayments or coinsurance, and the maximum out-of-pocket costs for a year). The overall approach to reform drives the kinds of…