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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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  • Pulling it Together: On Health Reform, Will All Roads Meet in the Middle?

    Perspective

    A few weeks ago a small group of upset single-payer advocates followed Senator Baucus into the parking garage of our D.C. building as he was arriving to do one of our health reform newsmaker breakfasts, cosponsored by Families USA and the National Federation of Independent Business.

  • A Guide to the Supreme Court’s Decision on the ACA’s Medicaid Expansion

    Issue Brief

    On June 28, 2012, the U.S. Supreme Court issued its decision in the case challenging the Affordable Care Act (ACA). The Court upheld the constitutionality of the ACA's individual mandate, which requires most people to maintain a minimum level of health insurance coverage beginning in 2014.

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

    Poll Finding

    This KFF survey is a follow-up survey of adults who had ACA Marketplace insurance in 2025. The survey examines the cost concerns and coverage changes that these 2025 Marketplace enrollees are experiencing following the expiration of the enhanced premium tax credits. The survey finds that half of returning enrollees say their health care costs are “a lot higher” and most expect to cut back on basic household expenses to afford coverage.

  • Claims Denials and Appeals in ACA Marketplace Plans in 2024

    Issue Brief

    This brief analyzes federal transparency data published by CMS on claims denials and appeals for Marketplace plan offered on HealthCare.gov in 2024, and finds insurers denied 19% of in-network claims. Consumers rarely appeal denied claims.

  • The New Ideas Conundrum in Health Policy

    From Drew Altman

    In a new column, President and CEO Dr. Drew Altman writes about the "conundrum of health policy ideas" facing Democrats searching for new proposals because of competing, and complex, priorities: rebuilding Medicaid and the ACA after trillion-dollar cuts, reconstructing federal health agencies, and tackling underlying health care costs, when candidates want simple ideas they can campaign on and voters want their costs to come down.

  • Firm Perspectives on the Medicare Advantage Market

    Issue Brief

    Based on interviews with senior executives at 14 large firms, the issue brief finds that insurers anticipate continuing to offer Medicare Advantage plans in 2012, in part because of a Medicare demonstration project that will award bonus payments to plans based on their quality standards.