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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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  • If Health Insurance Subsidies Are Struck Down, States Will Need Time

    From Drew Altman

    In this column for The Wall Street Journal's Think Tank, Drew Altman explores a practical timetable for state action if the Supreme Court rules in favor of the plaintiffs in King V. Burwell and ponders what Republicans in Congress might do.

  • Medicaid Moving Forward

    Issue Brief

    Medicaid is the nation’s main public health insurance program for people with low incomes, and it is the single largest source of health coverage in the U.S., covering nearly 70 million Americans. Medicaid also finances 16% of total personal health spending in the nation. States design and administer their own Medicaid programs within federal requirements, and states and the federal government finance the program jointly. As a major payer, Medicaid is a core source of financing for safety-net hospitals and health centers that serve low-income communities, including many of the uninsured. It is also the main source of coverage and financing for both nursing home and community-based long-term care.

  • Community Health Centers: A 2013 Profile and Prospects as ACA Implementation Proceeds

    Issue Brief

    Community health centers are an integral part of the health care safety-net, providing access to care for nearly 22 million people in underserved communities. The ACA established trust fund for health center growth, and with increased patient revenues attributable to expanded coverage, health centers’ grant funding to support care of the uninsured can go further. This brief provides a 2013 data profile of health centers; highlights pre-ACA differences between health centers in Medicaid expansion and non-expansion states; and considers financial challenges facing health centers and the implications of state Medicaid decisions, the outcome of King v. Burwell, and the approaching sunset of the special trust fund for health centers’ capacity to ensure access to care for the communities they serve.

  • Repayments and Refunds: Estimating the Effects of 2014 Premium Tax Credit Reconciliation

    Issue Brief

    This analysis estimates the range of repayment or refund amounts of the advanced premium tax credits issued to enrollees who experience income volatility between the time of enrollment and tax credit reconciliation. Using a simulation model among all households eligible for advance payments of the premium tax credits under the Affordable Care Act, it estimates that half would owe a repayment while 45 percent would be issued a refund of some or all of premium subsidies received.

  • State Actions to Improve the Affordability of Health Insurance in the Individual Market

    Issue Brief

    A number of states have taken steps to provide consumers with more affordable coverage options in the individual market, including the marketplaces. Some states are implementing strategies that lower premiums by building on, and increasing the stability of the individual market, while other states are expanding the availability of lower cost coverage sold outside the marketplaces that does not comply with ACA standards—an approach that could increase marketplace premiums further. This brief examines these different approaches and discusses the implications of state policy choices.

  • KFF Health Tracking Poll – July 2019: The Future of the ACA and Possible Changes to the Current System, Preview of Priorities Heading Into 2nd Democratic Debate

    Feature

    This month's KFF Health Tracking Poll explores public opinion towards a government-administered public option, and finds that attitudes can change after hearing common arguments. The poll also examines the public's views toward Medicare-for-all and the Affordable Care Act, as well as the top issues for Democrats ahead of the second round of presidential debates.

  • Poll: Strong Initial Support for a Public Option, But Arguments Can Significantly Shift Views

    News Release

    Health Care Remains a Top Issue for Democrats Heading into Next Debates; At This Stage, More Want to Hear About Candidates’ Difference than Contrasts with President Trump The 2020 presidential election may be shaping up to be another election cycle focused on health care, with Democratic candidates offering competing proposals aimed at expanding coverage and…

  • The Democratic Debates Suffer from a Nasty Case of Plan-itis

    From Drew Altman

    In The Washington Post op-ed “The Democratic Debates Suffer from a Nasty Case of Plan-itis,” Drew Altman says the primary debates are not serving voters well by focusing on details of candidates' health care plans rather than the fundamental differences between them.