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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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  • Most Americans – Across Parties – Say 2018 Candidates’ Position on Pre-Existing Condition Protections Will Matter to Their Vote; Do Not Want Supreme Court to Overturn These ACA Protections

    News Release

    Half in Non-Expansion States Support Their State Expanding Medicaid; More if Tied to Work Requirements With less than four months to go until the Congressional midterm general election, a candidate’s position on continuing protections for people with pre-existing health conditions is at the forefront of the many health care issues on voters’ minds, finds the…

  • After 16 Years, Partisans Still View the Affordable Care Act Very Differently

    Quick Take

    On the 16th anniversary of the Affordable Care Act’s (ACA) passage, most of the public (61%) view the law favorably, though opinions and debates remain as partisan as ever....As voters continue to grapple with the affordability of coverage and care, the partisan legacy of the ACA will almost certainly figure into debates about health care costs this fall.

  • Claims Denials and Appeals in ACA Marketplace Plans in 2023

    Issue Brief

    This brief analyzes federal transparency data released by the Centers for Medicare and Medicaid Services (CMS) on claims denials and appeals for non-group qualified health plans (QHPs) offered on HealthCare.gov in 2023. It finds that HealthCare.gov insurers denied nearly one out of every five claims (19%) submitted for in-network services. Information about the reasons for denials is limited, and few consumers appeal claims denials.

  • Claims Denials and Appeals in ACA Marketplace Plans in 2021

    Issue Brief

    This analysis of HealthCare.gov Marketplace insurers' transparency data finds that 17% of in-network claims were denied in 2021, with denial rates varying widely across insurers. Consumers appealed less than two-tenths of 1% of denied in-network claims.

  • Policy Changes Bring Renewed Focus on High-Deductible Health Plans 

    Issue Brief

    Policy changes, anticipated increases in premium costs for enrollees, and new standards for health savings accounts may encourage consumers to seek out plans with lower premiums but higher deductibles. This issue brief explores the features of bronze and catastrophic plans, coverage and costs, and the complicated choices consumers face.

  • How Unaffordable is Health Care?

    Perspective

    In his latest JAMA Forum column, KFF’s Larry Levitt explores how unaffordable health care is in the U.S. in the context of the debate over extending enhanced Affordable Care Act premium tax credits and an upcoming election where affordability will likely be front and center.

  • With or Without ACA Repeal, ACA and Medicaid Cuts are Looming

    Perspective

    In this JAMA Health Forum post, Executive Vice President Larry Levitt explores why the incoming Trump administration and Republican majorities in Congress are likely to pursue budget cuts in Medicaid and the Affordable Care Act and why such efforts are likely to boost the number of uninsured Americans.

  • Key Facts about the Uninsured Population

    Issue Brief

    This issue brief describes trends in health coverage in 2023, examines the characteristics of the uninsured population ages 0-64, and summarizes the access and financial implications of not having coverage.