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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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  • The Requirement to Buy Coverage Under the Affordable Care Act

    Other Post

    Note:  Congress eliminated the federal tax penalty for not having health insurance, effective January 1, 2019. Along with changes to the health insurance system that guarantee access to coverage to everyone regardless of pre-existing health conditions, the Affordable Care Act includes a requirement that many people be insured or pay a penalty.

  • Health Reform Hits Main Street

    Video

    This short cartoon explains the problems with the current health care system, the health reform changes that are happening now, and the big changes coming in 2014 as part of the Affordable Care Act (ACA). You can view the video on our site and it is also available on YouTube.

  • Health Reform Implementation Timeline

    Interactive

    The health reform implementation timeline is an interactive tool designed to explain how and when the provisions of the Affordable Care Act will be implemented over the next several years.

  • Kaiser Health Tracking Poll: February 2014

    Feature

    The February 2014 Kaiser Health Tracking Poll finds that those who are most likely to be customers in the Affordable Care Act (ACA)’s new insurance exchanges (the uninsured and those who purchase their own coverage) are more likely to prefer less costly plans with narrow provider networks over more expensive plans with broader networks, while the public overall has the opposite preference. Overall opinion of the ACA remains about the same as it has been since November, with just under half the public viewing the law unfavorably and just over a third having a favorable view.

  • Children’s Health Coverage: Medicaid, CHIP and the ACA

    Issue Brief

    This brief provides an overview of children’s coverage leading up to the implementation of the Affordable Care Act (ACA), a review of changes for children included in the ACA, and a look at issues leading up to the reauthorization of the CHIP program.

  • The Utah Health Care Landscape

    Fact Sheet

    This fact sheet provides an overview of the population health, health coverage, and health care delivery in Utah in the era of health reform.

  • Kaiser Health Tracking Poll: March 2014

    Feature

    The March Kaiser Health Tracking Poll finds that the gap between unfavorable and favorable opinions of the ACA narrowed this month among the public and the uninsured, and more want Congress to improve the law than replace it. The survey also finds that six in ten of the uninsured are unaware of the March 31 deadline to sign up for coverage, and half say they plan to remain uninsured.