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The ACA Marketplace

2025 KFF Marketplace Enrollees Survey

In 2025, about one in three ACA enrollees said they would be “very likely” to look for a lower-premium Marketplace plan If their premium payments doubled.

Cost Concerns and Coverage Changes: A Follow-Up Survey of ACA Marketplace Enrollees

Following the expiration of the enhanced premium tax credits for people with Affordable Care Act (ACA) Marketplace plans, a new KFF follow-up survey of the same Marketplace enrollees KFF surveyed in 2025 finds half (51%) of returning enrollees say their health care costs are “a lot higher” this year compared to last year, including four in 10 who specifically say their premiums are “a lot higher.”

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POLLING

Tracking the Public’s Views on the ACA

While overall opinion of the Affordable Care Act has been more favorable than unfavorable since 2017, there remain deep partisan divides. See how public opinion on the ACA has changed from the inception of the law to the present. This interactive tool highlights key moments when views shifted and trends based on party identification, income, age, gender, and race/ethnicity.
DATA

Marketplace Enrollment is Down in 2026—But All of the Data Isn’t in Yet

ANALYSIS

Higher Premium Payments or Higher Deductibles: The ACA's Tradeoffs

QUIZ

Test Your Knowledge of the Affordable Care Act

ANALYSIS

Competition Increased in Individual Market But Fell in Fully Insured Group Markets

Timely insights and analysis from KFF staff

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  • Survey Finds Approximately 3.4 Million Previously Uninsured Adult Californians Obtained Coverage Since Start of the Affordable Care Act’s First Open Enrollment Period

    News Release

    Immigration Status and Fears Pose Challenges to Further Expanding Coverage Among Hispanics Affordability Key Obstacle to Enrollment for Those Who Remain Uninsured MENLO PARK, Calif. -- Nearly six in 10 (58%) previously uninsured Californians report getting health insurance since last summer, finds the second wave of the Kaiser Family Foundation's Longitudinal Panel Survey following the experiences of a randomly selected  panel of uninsured Californians under the Affordable Care Act (ACA). Based on official estimates of…

  • Where are California’s Uninsured Now? Wave 2 of the Kaiser Family Foundation California Longitudinal Panel Survey

    Report

    This second wave of the Kaiser Family Foundation's California uninsured survey assesses the impact of the Affordable Care Act to date on state residents who were uninsured prior to open enrollment. The results capture the share of previously uninsured Californians who gained coverage or remained uninsured, how they feel about and interact with their new coverage options and what barriers to getting insurance remain. The report examines breakouts by race, coverage type, and other demographic…

  • Web Briefing: What Worked, What’s Next? Strategies in Four States Leading ACA Enrollment Efforts

    Event Date:
    Event

    On Monday, July 28, the Kaiser Family Foundation held an interactive web briefing to examine the experiences and lessons of four states -- Colorado, Connecticut, Kentucky, and Washington -- that each established state-based Marketplaces, expanded their Medicaid programs, and successfully enrolled eligible individuals into Medicaid and Marketplace coverage under the ACA.  The briefing drew upon a new issue brief released today by the Foundation’s Kaiser Commission on Medicaid and the Uninsured (KCMU), What Worked and…

  • The Stakes Beyond the Halbig Lawsuit

    From Drew Altman

    In a column for The Wall Street Journal’s Think Tank, Drew Altman discusses if the legal court cases about whether the government can provide tax credits to people in the Affordable Care Act’s federal health exchanges will be perceived by the American people as a legitimate legal question or as more inside-Washington politics.

  • How Obamacare’s Progress Makes Expanding Coverage Harder

    From Drew Altman

    This was published as a Wall Street Journal Think Tank column on July 21, 2014. The Affordable Care Act’s success meeting its initial enrollment goals and the repair of HealthCare.gov seem to have calmed the political waters for Obamacare. But the job of enrolling the uninsured gets harder, not easier, because the remaining uninsured will generally be tougher to reach. Recent surveys show, roughly in line with expectations, that 8 million to 9.5 million fewer adults are uninsured compared with last year before…

  • The Impact of the Children’s Health Insurance Program (CHIP): What Does the Research Tell Us?

    Issue Brief

    The Children’s Health Insurance Program (CHIP) was established in 1997 to provide coverage for uninsured children who are low-income but above the threshold for Medicaid eligibility. In 2009, and again in the Affordable Care Act (ACA), Congress extended federal funding for CHIP, but funding will expire a little over a year from now. Decisions about CHIP’s future funding will be consequential as more than 8 million low-income children were covered by CHIP at some point…

  • Web Briefing: What Worked, What’s Next? Strategies in Four States Leading ACA Enrollment Efforts

    News Release

    On Monday, July 28 from 1 p.m. to 2:00 p.m. EDT, the Kaiser Family Foundation will hold an interactive web briefing to examine the experiences and lessons of four states - Colorado, Connecticut, Kentucky, and Washington - that each established state-based Marketplaces, expanded their Medicaid programs, and successfully enrolled eligible individuals into Medicaid and Marketplace coverage under the ACA. The briefing will draw upon a new issue brief released today by the Foundation’s Kaiser Commission…

  • What Worked and What’s Next? Strategies in Four States Leading ACA Enrollment Efforts

    Issue Brief

    This brief highlights the experiences of four states—Colorado, Connecticut, Kentucky, and Washington—that established a State-based Marketplace (SBM), implemented the ACA’s Medicaid expansion, and achieved success enrolling eligible individuals into coverage. Based on interviews with key stakeholders in each state, it identifies effective strategies that contributed to enrollment and current priorities looking forward.