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Affordable Care Act

The ACA MarketplaceS

Change in February effectuated enrollment, by state, 2025-2026

How Has ACA Marketplace Enrollment Changed Across States in 2026?

ACA Marketplace enrollment fell this year in every state except New Mexico, which was the only state to fully replace the enhanced premium tax credits that expired last year with a state-funded subsidy, according to a new KFF analysis of effectuated enrollment data. The Marketplace enrollment decline—the first in seven years—follows several years of rapid enrollment growth and coincides with the end of the enhanced federal subsidies.

How Much and Why ACA Marketplace Premiums Are Going Up in 2027

ACA Marketplaces insurers are proposing a median premium increase of 15% in 2027, according to KFF’s updated analysis of 276 insurers with publicly available filings across all 50 states and the District of Columbia. This is the second consecutive year of double-digit premium hikes. Last year’s median nationwide proposed rate change was 18%, and the median finalized rate change was 20%. While this proposed rate change is lower than last year, it represents the second-highest requested rate change since 2018, as premium growth had been relatively flat in this market for several years.

About the ACA

Promotional image for KFF video How Affordable is the Affordable Care Act

Did the Affordable Care Act Make Health Care More Affordable?

The expiration of the ACA’s enhanced premium tax credits at the start of 2026, combined with rising insurer premiums, put a spotlight on health care affordability that extends beyond Marketplace enrollees. KFF’s Cynthia Cox examines the ACA’s record and the broader underlying question it raises: what’s a fair price for Americans people to pay for health care?

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  • Shared Medical Decision Making: We’re in This Together

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    In recent years, awareness of the patient’s important role in managing his or her own care has been steadily growing—fed not only by such trends as the proliferation of health information on the internet and direct-to-consumer advertising, but also by the emerging science of patient-centered decision making. One way to facilitate shared decision making is through the use of decision support tools, which offer the patient high quality medical information in an easily understandable format.…

  • Essential Health Benefits: Balancing Affordability and Adequacy

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    Under the Patient Protection and Affordable Care Act (PPACA), insurance plans offered through state insurance exchanges as well as non-grandfathered plans offered in the individual and small group markets - will be required to cover a set of health benefits and services called the "essential health benefits" package. Guidance issued last month by the Department of Health and Human Services will give each state some discretion to specify benefits package raises many questions. What is…

  • Making Sense of the Census Uninsured Numbers

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    The Alliance for Health Reform and the Kaiser Family Foundation’s Commission and Medicaid and the Uninsured discuss the Census uninsured numbers. The Census Bureau announced that the number of people without health insurance dropped from 50 million to 48.6 million in 2011, marking the first decrease since 2007. That information came from the Current Population Survey, but it isn't the only data that Census is releasing on the uninsured. The Bureau is preparing a second…

  • 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.

  • Updated for 2015: Tool Displays By Locality the Share of Potential ACA Federal Marketplace Enrollees That Signed Up

    News Release

    An interactive tool from the Kaiser Family Foundation is now updated with 2015 data, allowing users to view on a local level the share of potential enrollees who signed up for a health plan in a federally-based marketplace under the Affordable Care Act. With Mapping Marketplace Enrollment, users can also compare the number of potential and actual enrollees – and the percentage that signed up for a plan -- in 2014 and 2015 within 100,000-resident…

  • Media Availability on the U.S. Supreme Court’s King v. Burwell Decision

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    The Kaiser Family Foundation held a media-only conference call with key experts on the Affordable Care Act (ACA), state marketplaces and more to explain the U.S. Supreme Court's decision in the King v. Burwell case and to answer questions about its implications. The petitioners in the case are challenging the legality of premium and cost-sharing subsidies for low- and middle-income people buying health plans in 34 states where the federal government rather than the state…

  • ACA Open Enrollment: If You Are Low-Income

    Fact Sheet

    This fact sheet explains 2020 health coverage options that may be available to people who have low incomes, including Medicaid coverage or individual insurance plans through Affordable Care Act (ACA) marketplaces.

  • State Fiscal Conditions and Medicaid: 2014 Update

    Issue Brief

    This issue brief provides an overview of Medicaid financing, Medicaid’s role in state budgets, the relationship between Medicaid and the economy and how the ACA and the Medicaid expansion could affect state budgets.

  • The Uninsured And The Difference Health Insurance Makes

    Fact Sheet

    This fact sheet describes the characteristics of the uninsured and explains the recent increase in this population. It also examines the difference that health insurance can make and how health reform is expected to cover millions more people.

  • State Variation and Health Reform: A Chartbook

    Report

    This chartbook pulls together data related to state variation in key areas such as major industry types, poverty and unemployment rates and fiscal conditions; health coverage and the uninsured; Medicaid and CHIP eligibility and enrollment; Medicaid spending and financing; access to Health Care; health care costs; and insurance markets.