Affordable Care Act

The ACA MarketplaceS

Individual Market Enrollment Declined by 18% Since June 2025

Individual Market Enrollment Fell 18%, Suggesting Continued ACA Marketplace Losses

Enrollment in the individual health insurance market fell by 18%—over 4.6 million people—from 25.2 million in June 2025 to 20.5 million in June 2026. Falling individual market enrollment suggests further decline in ACA Marketplace enrollment this year, since Marketplace enrollees represent the vast majority of individual market coverage.

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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  • The New Health Care Agenda: Gridlock, Lots of Hearings

    From Drew Altman

    In an Axios column, Drew Altman analyzes what the midterm election means for the health policy agenda between now and 2020--mostly political positioning and gridlock in Congress, with most of the action affecting people in the states. 

  • More Insurers Are Participating in the ACA Marketplaces in 2019

    News Release

    Insurer participation in the Affordable Care Act’s health insurance marketplaces is rising in 2019, finds a new analysis from KFF (the Kaiser Family Foundation).The increase follows consecutive years of improving insurance company profits and shows up in several different ways: Going into 2019, 608 counties nationwide are gaining at least one insurer in the marketplace, while only five counties will lose an insurer. In 2019, roughly 17 percent of enrollees (living in 37 percent of…

  • Medicare for All is a Double-Edged Sword for Democrats

    From Drew Altman

    In an Axios column, Drew Altman analyzes the political pros and cons of Medicare for All and Medicare buy-in plans for Democrats, and how they may handle it in Congress and the presidential campaign.

  • New Rules for Section 1332 Waivers: Changes and Implications

    Issue Brief

    On October 22, 2018, the Trump administration released new guidance on Section 1332 waivers established by the Affordable Care Act (ACA). The new guidance may encourage states to use 1332 waiver authority to make broader changes to insurance coverage for their residents, including to promote the sale of, and apply subsidies to, ACA non-compliant policies. On November 29, 2018, the Centers for Medicare and Medicaid Services (CMS) released a discussion paper outlining a set of…

  • How Many of the Uninsured Can Purchase a Marketplace Plan for Free?

    Issue Brief

    This analysis looks at how many of the remaining uninsured are eligible for premium subsidies that are large enough to cover the entire cost of a bronze plan, which is the minimum level of coverage available on the Marketplaces. It estimates 27% of uninsured individuals who could shop on the ACA Marketplace, or 4.2 million people nationwide, are eligible to purchase a bronze plan with $0 premiums after subsidies in 2019.

  • The Role Health Is and Is Not Playing in the Midterms

    From Drew Altman

    With less than two weeks until Election Day, Drew Altman discusses health being the top issue, but not necessarily the top factor in voters' 2018 decisions. He says the longer-term impact of health may be its continuing role in the debate leading up to the 2020 presidential race.

  • 2019 Premiums for ACA Silver Plans Will Be 16 Percent Higher Than They Would Have Been Absent the Repeal of the Individual Mandate, Expansion of Short-Term Plans and Loss of Federal Cost-Sharing Payments, Analysis Finds

    News Release

    Although 2019 premiums for plans in the Affordable Care Act marketplaces are flat or falling in many parts of the country, they would be substantially lower still if not for several Trump administration-backed changes to private insurance markets, finds a new KFF analysis. ACA silver-level plans sold in the marketplaces will cost an average of 16 percent more than they otherwise would have, thanks to the combined effects of the loss of ACA cost-sharing reduction…

  • Analysis: Marketplace Plans Denied an Average of Nearly One in Five Claims in 2017 with Wide Variations across Insurers

    News Release

    Healthcare.gov marketplace insurers denied nearly one out of every five claims (19%) submitted for in-network services in 2017, and enrollees only appeal a tiny share (0.5%) of those denied claims, a KFF analysis of recently released claims data finds. The analysis finds a huge variation across insurers, with average denial rates as low as 1 percent and as high as 45 percent. Denial rates also vary across states, though individual insurers in the same state…