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Affordable Care Act

The ACA MarketplaceS

How Has Marketplace Enrollment Changed Across States in 2026?

Following several years of rapid enrollment growth in the ACA Marketplaces that corresponded with temporary enhanced premium tax credits, enrollment fell for the first time in seven years in 2026, when those tax credits expired. Every state except for New Mexico saw a drop in Marketplace enrollment from 2025 to 2026. State-based Marketplaces that run their own enrollment platforms, including those that partially offset the enhanced tax credits, generally saw lower drops in enrollment.

About the ACA

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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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  • Kaiser Health Tracking Poll: March 2013

    Feature

    Three years after the passage of the Affordable Care Act, the March 2013 Kaiser Health Tracking Poll finds that a majority of Americans are unsure how the law will impact them, and few are paying attention to the details of state-level decisions about implementation.

  • Market Share of Largest Insurance Carrier in the Individual Insurance Market, 2010

    Feature

    Market Share of Largest Insurance Carrier in the Individual Insurance Market, 2010 Download Source Kaiser Family Foundation analysis of 2010 insurer filings to the National Association of Insurance Commissioners and the California Department of Managed Health Care using the Mark Farrah Associates Health Coverage Portal TM. Market share was calculated as the percent of the state’s individual insurance market enrollment accounted for by each parent company (measured in member months)  

  • How People Get Covered

    Feature

    How-People-Get-Covered-HEALTHREFORM Download Source Kaiser Family Foundation  

  • How Many Are Affected?

    Feature

    How Many Are Affected? Download Source Kaiser Family Foundation  

  • Health Insurance Premiums in the Individual Market in 2010

    Feature

    Health Insurance Premiums in the Individual Market in 2010 Download Source Kaiser Family Foundation analysis of 2010 insurer filings to the National Association of Insurance Commissioners using the Mark Farrah Associates Health Coverage Portal. The Average premium is calculated as total premium revenues in a state divided by the number of total member months. The per member per month premium is an average across adults and children, so will be lower than a premium typically…

  • Translating The Medicaid Expansion Into Increased Coverage: The Role Of Application Assistance

    Event Date:
    Event

    Under the Affordable Care Act (ACA), beginning in 2014 all states will employ streamlined, technology-driven enrollment systems to help eligible people sign up for insurance affordability programs, including Medicaid, the Children's Health Insurance Program and the new health insurance exchange marketplaces. Even with these streamlined systems in place, application assistance will be important for helping to translate the ACA's Medicaid and other coverage expansions into increased coverage. The Kaiser Family Foundation's Commission on Medicaid and…