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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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  • Preventive Services Use Among People with Private Insurance Coverage

    Issue Brief

    This analysis of claims data estimates that six in ten people with private health insurance - or about 100 million people - used at least one preventive service covered without any out-of-pocket costs through a provision of the Affordable Care Act (ACA) in a typical year prior to the COVID-19 pandemic (2018). The provision that requires most private health plans to cover many preventive services without any cost-sharing for their enrollees is being challenged in…

  • 2026 Medical Loss Ratio Rebates

    Issue Brief

    Insurers estimate they will pay $759.2 million in Medical Loss Ratio (MLR) rebates in 2026 to select individuals and employers that purchase their health coverage, according to a KFF analysis of preliminary data reported to state regulators. The estimated rebate for 2024 is less than rebates issued in most prior years.

  • Coverage Expansions and the Remaining Uninsured: A Look at California During Year One of ACA Implementation

    Report

    California is a bellwether state for understanding the impact of the Affordable Care Act (ACA). Much attention has been paid to enrollment in California's new coverage options, such as the Medicaid expansion (Medi-Cal) and plans sold through ACA marketplaces (Covered California), and to changes in the uninsured from 2013 to 2014. However, less is known about how this coverage has affected people’s access to care and financial security, and why others remain uninsured. This report,…

  • Round 2 on the Legal Challenges to Contraceptive Coverage: Are Nonprofits “Substantially Burdened” by the “Accommodation”?

    Issue Brief

    The Affordable Care Act (ACA) requires most private health insurance plans to provide coverage for a broad range of preventive services including Food and Drug Administration (FDA) approved prescription contraceptives and services for women. Since the implementation of the ACA contraceptive coverage requirement in 2012, over 200 corporations have filed lawsuits claiming that including coverage for contraceptives or opting for an “accommodation” from the federal government violates their religious beliefs. This brief explains the legal…

  • Are More Americans Benefiting From Obamacare Than Realize It?

    News Release

    In his latest column for The Wall Street Journal’s Think Tank, Drew Altman discusses why many people may not know whether or not they are benefiting from the Affordable Care Act. All previous columns by Drew Altman are available online.

  • Medicaid Delivery System and Payment Reform: A Guide to Key Terms and Concepts

    Fact Sheet

    There is wide state variation in Medicaid health care delivery and payment systems, as states design and combine service delivery models and payment approaches in a multitude of ways. To help those interested in understanding the diversity of Medicaid reform initiatives underway or in development in states across the country, this guide defines key terms.