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Affordable Care Act

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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  • How has the ACA Medicaid Expansion Affected Providers Serving the Homeless Population: Analysis of Coverage, Revenues, and Costs

    Issue Brief

    To further understand how the first full year of Medicaid expansion has affected patients who are homeless and the providers who care for them, this analysis uses data from the Uniform Data System (UDS) for health centers to examine changes in insurance coverage, revenues and costs among Health Care for the Homeless (HCH) projects serving the homeless population.

  • Analysis of UnitedHealth Group’s Premiums and Participation in ACA Marketplaces

    Issue Brief

    This analysis looks at how a potential withdrawal by UnitedHealth Group from the Affordable Care Act (ACA) marketplaces in 2017 could impact insurer competition and premiums, finding a significant impact in some markets, though it would have a minimal effect on the average benchmark premium nationwide, The impacts of a UnitedHealth withdrawal would vary considerably by state and market area, with a more pronounced effect in rural areas. Since UnitedHealth often is not one of the lower cost plans, the effect nationally on premiums of an exit by the insurer would be modest.

  • ACA Coverage and the Changing Labor Market: Voices from the Field

    Issue Brief

    This brief highlights voices from adult focus group participants with low and moderate incomes who gained Medicaid or Marketplace coverage following implementation of the ACA. It focuses on work, including work status, the new labor market, job benefits, and the role of ACA coverage for those with non-traditional jobs.

  • Clinton-Sanders Contest Fuels Democratic Support for Expanding Obamacare

    News Release

    In his latest column for The Wall Street Journal’s Think Tank, Drew Altman discusses how the debate between Hillary Clinton and Bernie Sanders about how to get to universal coverage has generated more support among Democrats for expanding the Affordable Care Act (and less support for the law as is).

  • Partisanship’s Grip On The Affordable Care Act

    From Drew Altman

    In this Wall Street Journal's Think Tank column Drew Altman analyzes data from an upcoming Kaiser poll and discusses how partisanship is the dominant factor shaping views of the Affordable Care Act for Republicans and Democrats enrolled in marketplace plans.

  • Puerto Rico: Fast Facts

    Fact Sheet

    Puerto Rico: Fast Facts provides a quick snapshot of the island's demographic, health, and economic characteristics. It also provides some information on federal Medicaid rules, infrastructure, and fiscal challenges ahead.

  • Survey of Non-Group Health Insurance Enrollees, Wave 3

    Poll Finding

    The survey, conducted shortly after the close of the Affordable Care Act’s third open enrollment period, is the third in a series exploring the experiences of individuals who purchase their own health insurance in the nongroup market, including coverage purchased both inside and outside the ACA’s marketplaces. It examines enrollees’ satisfaction with their health plans’ premiums, deductibles, and provider networks, their views on affordability, shopping experiences, and problems encountered with their plans.