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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

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  • 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.

  • Mapping the Effects of the ACA’s Health Insurance Coverage Expansions

    Interactive

    The Foundation originally released this interactive tool in February 2012.  More recent analysis of the Affordable Care Act's potential impact on each state's uninsured population can be accessed through this interactive tool and these individual state reports.

  • ACA Advertising in 2014 – Insurance and Political Ads

    Report

    This study analyzes the volume and content of political ads mentioning health care issues that aired in 2014 through Oct. 15, as well as health insurance spots promoting specific insurance products or encouraging enrollment in marketplace plans. It finds that about 14 percent of political ads in all races mention the Affordable Care Act, Obamacare or any of the law's specific provisions, mostly in a negative way.

  • The ACA’s Basic Health Program Option: Federal Requirements and State Trade-Offs

    Report

    The Patient Protection and Affordable Care Act (ACA) gives states the option to implement a Basic Health Program (BHP) that covers low-income residents through state-contracting plans outside the health insurance marketplace, rather than qualified health plans (QHPs). In March 2014, the Centers for Medicare & Medicaid Services (CMS) issued final regulations on the requirements for a BHP and the methodology for calculating federal payments to states. States can choose to implement BHP beginning in 2015. This report summarizes these federal policies, including the requirements for BHP as well as the methodology for determining federal BHP payments. It then analyzes the key trade-offs facing states as they decide whether and, if so, how to implement BHP, with a particular focus on the impact of BHP on state budgets and the size, stability, and risk level of state marketplaces.

  • Mapping Marketplace Enrollment

    Interactive

    This interactive zip code tool and map displays enrollment in the Health Insurance Marketplaces as a share of the potential market in small geographic areas across the country.