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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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  • Workers Wary of Wellness Programs that Tie Premiums to Participation and Outcomes

    News Release

    June Poll Finds No Change in Public's Overall View of the Affordable Care Act Most in Military Households Say VA Problems Are Systemic and Care Not As Good As What Other Americans Receive  As many employers begin to expand their wellness programs under new guidelines set forth by the Affordable Care Act (ACA), the latest…

  • Kaiser Health Tracking Poll: October 2014

    Feature

    In the final Kaiser Health Tracking Poll before the 2014 midterm elections in November, the Affordable Care Act (ACA) continues to be just one of several issues on voters’ minds. Less than 1 in 10 registered voters identify the ACA as the most important issue to their vote, ranking behind the economy, dissatisfaction with government, education and the situation in Iraq and Syria. With the ACA’s second open enrollment period approaching, the poll also finds the uninsured are not yet tuned in. About 9 in 10 of the uninsured are unaware of when the next open enrollment period begins, two thirds say they know “only a little” or “nothing at all” about the marketplaces, and just over half are unaware of financial assistance available.

  • The Uninsured and the ACA: A Primer – Key Facts about Health Insurance and the Uninsured amidst Changes to the Affordable Care Act

    Report

    The Uninsured and the ACA: A Primer provides information on how insurance has changed under the ACA and more recent policy changes, how many people remain uninsured, who they are, and why they lack health coverage. It also summarizes what we know about the impact that a lack of insurance can have on the health outcomes and personal finances and the difference health insurance can make in people’s lives.

  • Testimony: Pre-Existing Conditions and Health Insurance

    Issue Brief

    KFF's Karen Pollitz testimony before the U.S. House Committee on Ways and Means on Jan. 29, 2019 examines the prevalence of pre-existing conditions, the impact of the Affordable Care Act's prohibition against medical underwriting and other provisions aimed at stabilizing the insurance risk pool, and the trade-offs involved in relaxing those provisions. 

  • Bipartisan Majorities Support Trump Administration’s Push to Get Drug Prices in Advertisements, Even after Hearing Counter-Arguments

    News Release

    Only 1 in 4 Potential Marketplace Customers Know When ACA Open Enrollment Ends; 1 in 5 Say They Would Buy a Short-Term Plan A large majority of the public backs the Trump Administration’s initiative to require prescription drug advertisements to include information about prices, but fewer support other administrative actions involving pre-existing conditions and contraception…

  • What Does the Outcome of the Midterm Elections Mean for Medicaid Expansion?

    Fact Sheet

    While not typically an election issue, Medicaid — particularly the Medicaid expansion created under the Affordable Care Act (ACA) — was an important issue in the 2018 midterm elections in a number of campaigns throughout the country. This fact sheet highlights key states in which the results of the 2018 midterm elections have implications for Medicaid adoption or implementation. States examined include those that had Medicaid expansion ballot initiatives as well as states that have not yet adopted or implemented expansion but elected governors who support Medicaid expansion. In these states that had gubernatorial races with implications for Medicaid expansion, it will be important to monitor changes in the composition of state legislatures, as governors in most states will need to work with their legislatures in order to adopt the expansion.