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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.”

new and noteworthy
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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  • Status of State Medicaid Expansion Decisions

    Interactive

    This page displays an interactive map of the current status of state decisions on the Affordable Care Act's Medicaid expansion. Additional Medicaid expansion resources are listed (with links) below the map.

  • KFF Health Tracking Poll: Health Care Costs, Expiring ACA Tax Credits, and the 2026 Midterms

    Poll Finding

    Looking ahead to the midterm elections, health care costs are the public’s top economic concern, and many voters say the issue will have a major impact on their vote. On health care issues, including the cost of health care, voters currently trust Democrats more than Republicans, though neither party has an advantage on addressing the overall cost of living. Following the expiration of the ACA enhanced tax credits, two-thirds of the public say Congress did the “wrong thing” by not extending them.

  • The Effects of Medicaid Expansion under the ACA: Studies from January 2014 to January 2020

    Report

    This literature review summarizes findings from 404 studies of the impact of state Medicaid expansions under the ACA published between January 2014 (when the coverage provisions of the ACA went into effect) and January 2020. It includes studies, analyses, and reports published by government, research, and policy organizations using data from 2014 or later. This body of research suggests that the expansion presents an opportunity for gains in coverage, improvements in access and financial security, and economic benefits for states and providers.

  • Coronavirus Response and the Affordable Care Act

    Policy Watch

    This post examines the Affordable Care Act's impact 10 years after its enactment and how its provisions, especially those that expand coverage opportunities, could address the health threat and economic upheaval caused by the coronavirus pandemic.

  • Health Reform and Medicare: Overview of Key Provisions Tutorial

    Interactive

    This tutorial was produced for kaiserEDU.org, a Kaiser Family Foundation website that ceased production in September 2013. The kaiserEDU.org tutorials are no longer being updated but have been made available on kff.org due to demand by professors who are using the tutorials in class assignments. You may search for other tutorials to view on kff.org.

  • A Tale of Two Siblings, the ACA, and the Supreme Court

    From Drew Altman

    In a column published on The Huffington Post, Kaiser Family Foundation President and CEO Drew Altman shows how the U.S. Supreme Court’s decision to make the ACA Medicaid expansion a state option has upended the health insurance system for low and moderate income people in many states and discusses how the states and federal government can address the problem.

  • Retiree Health Benefits At the Crossroads

    Report

    This issue brief reviews recent trends and developments in employer-sponsored retiree health coverage and examines the impact of recent legislation, such as the Medicare drug benefit and the Affordable Care Act (ACA) on retiree health coverage. The report describes leading strategies employers have been pursuing or considering to limit costs for retiree health benefits. In addition, the report considers the potential implications of proposals aimed at reducing federal spending for retiree health coverage and costs.

  • Visualizing Health Policy: Preventive Services for Women and the ACA

    Other Post

    This month’s Visualizing Health Policy infographic takes a look at preventive health services for women, including missed opportunities for preventive counseling on risk factors (such as smoking or alcohol) and sexual health issues (such as contraception, sexually transmitted infections, and domestic violence), the effects of lack of insurance on rates of mammograms and other screening…