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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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  • Medicaid’s Role in West Virginia

    Fact Sheet

    This fact sheet provides data on Medicaid's role in West Virginia. It describes how ending the enhanced match for Medicaid expansion and implementing a per capita cap or block grant would affect West Virginia.

  • Kaiser Health Tracking Poll – September 2017: What’s Next for Health Care?

    Feature

    This poll finds large majorities across all parties say reauthorizing funding for the Children's Health Insurance Program (CHIP) is an important priority for Congress; however, a larger share of Republicans also say it is important for Congress to work on repealing and replacing the Affordable Care Act (also known as Obamacare). This month's Kaiser Health Tracking Poll also examines public support for a variety of competing health care policies aimed at improving or replacing the 2010 health care law, including single-payer.

  • How to Keep ACA Stabilization Narrow

    From Drew Altman

    In this column for Axios, Drew Altman discusses the main challenges for members and media coverage as members take up the issue of stabilization of the Affordable Care Act.

  • Getting into Gear for 2014: Shifting New Medicaid Eligibility and Enrollment Policies into Drive

    Report

    On January 1, 2014, many key provisions of the Affordable Care Act (ACA) will start to go into effect, including the expansion of Medicaid to low-income adults and the launch of new Medicaid eligibility and enrollment processes, which are designed to move toward a coordinated enrollment system across health coverage programs, including Medicaid, CHIP, and the new Health Insurance Marketplaces. Over the past year, states have made steady and significant progress preparing for these changes, but readiness varies considerably as 2014 nears, and implementation work and ongoing process improvements will continue into the foreseeable future. To provide greater insight into the status of implementation, this report provides an overview of key state Medicaid eligibility and enrollment policies slated to go into effect based on data released by the Centers for Medicare and Medicaid Services (CMS).

  • How Will the Uninsured in Arkansas Fare Under the Affordable Care Act?

    Fact Sheet

    This state report explains how the ACA expands coverage in Arkansas, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people in Arkansas are eligible for Medicaid or financial assistance in the Marketplace. For states not expanding Medicaid, the report quantifies how many uninsured people fall into the “coverage gap,” meaning they will be ineligible for financial assistance in the Marketplace or for Medicaid in their state despite having an income below the federal poverty level.

  • How Will the Uninsured in California Fare Under the Affordable Care Act?

    Fact Sheet

    This state report explains how the ACA expands coverage in California, including a breakdown of how many uninsured people are eligible for Medicaid, how many are eligible for financial assistance to help them buy private insurance in the new Marketplace and how many will not receive any financial assistance at all. The report also details, in specific dollar figures, the income levels at which people in California are eligible for Medicaid or financial assistance in the Marketplace. For states not expanding Medicaid, the report quantifies how many uninsured people fall into the “coverage gap,” meaning they will be ineligible for financial assistance in the Marketplace or for Medicaid in their state despite having an income below the federal poverty level.