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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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  • Are More Americans Benefiting From Obamacare Than Realize It?

    News Release

    In his latest column for The Wall Street Journal’s Think Tank, Drew Altman discusses why many people may not know whether or not they are benefiting from the Affordable Care Act. All previous columns by Drew Altman are available online.

  • State-by-State Effects of a Ruling for the Challengers in King v. Burwell

    Interactive

    A map and table showing the number of people now receiving premium subsidies who would lose them if the Court finds for the challengers; the total amount of federal subsidy dollars; the average subsidy (or average premium tax credit) that subsidized enrollees have qualified for; and the average increase in premiums that subsidized enrollees would face if the subsidies are disallowed.

  • How Have Insurers Fared Under the Affordable Care Act?

    Perspective

    This analysis tracks the financial performance of insurers in the individual market by evaluating trends in the medical loss ratio (MLR) in the pre-ACA landscape from 2010 to 2013 and estimates the MLR for the first full year of Affordable Care Act implementation in 2014. Findings suggest that although performance varied among insurers, insurers overall had roughly comparable financial performance in 2014 as in recent prior years.

  • King v. Burwell and Media Coverage

    From Drew Altman

    In this column for The Wall Street Journal’s Think Tank, Drew Altman lays out the news media’s challenge covering the upcoming Supreme Court King v. Burwell decision about the ACA.

  • Analysis Estimates 1 in 4 Employers Offering Health Benefits Could Be Affected by the ‘Cadillac Tax’ in 2018 if Current Trends Continue

    News Release

    Share of Potentially-Affected Employers Could Grow to 30% in 2023, 42% in 2028, Analysis Finds New projections from the Kaiser Family Foundation estimate that one in four employers (26%) offering health benefits could be subject to the Affordable Care Act’s tax on high-cost health plans, also known as the "Cadillac plan" tax, in 2018 unless…

  • Will GOP Candidates’ Positions on Obamacare Matter in Crowded Field?

    From Drew Altman

    In this column for The Wall Street Journal's Think Tank, Drew Altman analyzes the politics of Republican Affordable Care Act replacement plans and the challenges all Republican candidates will face distinguishing themselves from others on the ACA in a crowded primary field.

  • New Tracker Monitors Affordable Care Act Preventive Services Coverage

    News Release

    The Affordable Care Act requires private insurance plans to cover recommended preventive services with no out-of-pocket charges for patients. This slate of covered services can change when the U.S. Preventive Services Task Force and other authorized groups add or modify recommendations; the federal government also periodically issues clarifications to guide health plans in their coverage.

  • Analysis of 2016 Premium Changes in the Affordable Care Act’s Health Insurance Marketplaces

    Fact Sheet

    The chart and tables below present an updated analysis of changes in premiums for the lowest- and second-lowest cost silver Affordable Care Act (ACA) marketplace plans in major cities in 48 states and the District of Columbia, where we were able to find complete data on rates for all insurers. This page will be updated as complete rate information becomes available for more states. More background can be found in our earlier analysis of 2016 rates.