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Affordable Care Act

The ACA MarketplaceS

How Has Marketplace Enrollment Changed Across States in 2026?

Following several years of rapid enrollment growth in the ACA Marketplaces that corresponded with temporary enhanced premium tax credits, enrollment fell for the first time in seven years in 2026, when those tax credits expired. Every state except for New Mexico saw a drop in Marketplace enrollment from 2025 to 2026. State-based Marketplaces that run their own enrollment platforms, including those that partially offset the enhanced tax credits, generally saw lower drops in enrollment.

About the ACA

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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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  • Again, No Medicaid

    From Drew Altman

    In his latest column, KFF President and CEO Drew Altman explains why Medicaid, despite former President Donald Trump's silence on the topic, warrants greater attention given the potential for drastic changes or cuts to it should Republicans win control in the election.

  • 8 Things to Watch for the 2026 ACA Open Enrollment Period

    Issue Brief

    The ACA Marketplace Open Enrollment season begins November 1, and with it comes looming changes to the enhanced premium tax credits, increases in out-of-pocket premium payments, new Marketplace eligibility rules, and more. Read our analysis of what these and other changes could mean for new and returning enrollees.

  • Health Insurance Marketplace Calculator

    Feature

    The Health Insurance Marketplace Calculator, updated with 2025 premium data, provides estimates of health insurance premiums and subsidies for people purchasing insurance on their own in health insurance exchanges (or “Marketplaces”) created by the Affordable Care Act (ACA).

  • How Will the 2025 Reconciliation Law Affect the Uninsured Rate in Each State?

    Issue Brief

    This analysis apportions the increase in the number of uninsured across the 50 states and DC. CBO estimates that the reconciliation law will increase the number of uninsured by 10M in 2034 and rise to over 14M if enhanced premium tax credits for ACA Marketplace enrollees expire later this year.

  • Health Policy 101 Introduction

    Feature

    Health Policy 101 is a comprehensive guide covering fundamental aspects of U.S. health policy and programs, including Medicare, Medicaid, the Affordable Care Act, employer-sponsored insurance, the uninsured population, health care costs and affordability, women's health issues, and health care politics. It includes overviews of private health insurance regulation, racial and ethnic disparities, public health, international comparison of health systems, U.S. global health policy, and the federal role in health policy. The chapters can be downloaded…

  • Affordable Care Act Marketplace and Medicaid Expansion Enrollment Reached a Combined 44 Million in 2024  

    News Release

    A new KFF analysis finds that there were 44 million people enrolled in health coverage through the Affordable Care Act’s Marketplaces and its expansion of the Medicaid program in 2024. That represents about 1 in every 6 people under age 65, or 16.4%.   There was significant variation in ACA enrollment across states, ranging from about 1 in 4 nonelderly people in Louisiana, Oregon, Florida, and New York to fewer than 1 in 10 in…

  • Calculadora del Mercado de Seguros Médicos

    Feature

    Esta calculadora ilustra las primas (el costo mensual de su seguro) y subsidios para las personas que compran seguro médico por su propia cuenta en el mercado de seguros de salud (o de intercambio) creado por la Ley de Cuidado de Salud a Bajo Precio (Affordable Care Act, ACA, en inglés). Con esta calculadora, usted puede introducir diferentes niveles de ingresos, edades, y el tamaño de su familia para obtener un estimado de su elegibilidad…