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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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  • Is COVID-19 a Pre-Existing Condition? What Could Happen if the ACA is Overturned

    Policy Watch

    If the ACA is overturned, federal law protection for people with pre-existing health conditions would end.  This post examines what that could mean for people in the time of COVID-19, including whether and how insurers could deny coverage to people who have had COVID or other pre-existing conditions.

  • A Court Ruling Striking Down the ACA Would Eliminate the Medicaid Expansion and Cause Millions of Low-Income People to Become Uninsured

    News Release

    Millions of low-income Americans currently covered by Medicaid likely would become uninsured if the Supreme Court were to strike down the Affordable Care Act in California v. Texas, a legal challenge the high court is scheduled to hear in early November, KFF experts explain in a new Policy Watch post. Overturning the ACA would eliminate the expansion of Medicaid, which largely has been financed by the federal government, and eliminate eligibility for Medicaid for low-income…

  • The 2020 Presidential Election: Implications for Women’s Health

    Issue Brief

    This brief and side-by-side tables reviews the key health issues that are likely to have a direct impact on women’s health as well as their access to coverage and care, and summarizes the presidential candidates’ stated positions and records on these issues.

  • KFF Health Tracking Poll – October 2020: The Future of the ACA and Biden’s Advantage On Health Care

    Report

    The poll examines the public's views on the Supreme Court case to overturn the Affordable Care Act and its protections for people with pre-existing conditions. Less than a month from the results of the 2020 presidential election, this poll examines the top issues for voters (the economy, the coronavirus pandemic, health care, criminal justice and policing, among others) as well as which candidate, Biden or Trump, they think has the better approach to handle key…

  • Medicaid Covers People with Pre-Existing Conditions, Too

    Policy Watch

    In recent weeks, the possible overturning of the Affordable Care Act (ACA) in court and the upcoming election have focused attention on the issue of protections for people with pre-existing conditions. While the focus has been on the ACA’s private insurance protections, Medicaid also plays a significant role in covering people with pre-existing conditions.

  • How Many Uninsured Adults Could Be Reached If All States Expanded Medicaid?

    Issue Brief

    As more people lose their jobs and accompanying ESI, more may fall into the coverage gap, particularly starting in 2021 after unemployment benefits expire for many who have lost their jobs and incomes are likely to drop below the minimum threshold for marketplace subsidies. This analysis estimates how many uninsured adults—including those uninsured even before the pandemic and those who could become uninsured as a result of it— could become eligible for Medicaid if states…

  • 4.7 Million Uninsured Adults Could Become Eligible for Medicaid by 2021 if All Remaining States Expanded the Program under the ACA

    News Release

    About 4.7 million uninsured adults could gain eligibility for Medicaid by 2021 if the 14 remaining non-expansion states were to expand Medicaid under the Affordable Care Act, a new KFF analysis finds. That figure includes an estimated 2.8 million adults who already were uninsured prior to the coronavirus pandemic and would fall in the “coverage gap” – meaning they have incomes too high to qualify for Medicaid but too low for ACA marketplace subsidies –…

  • Insurance Coverage and Viral Suppression Among People with HIV in the United States, 2015-2018

    Feature

    Health insurance coverage and access to care improve health outcomes, including viral suppression, for people with HIV in the United States. Prior research has demonstrated that implementation of the Affordable Care Act (ACA) in 2014 increased coverage among people with HIV and that certain forms of coverage are positively correlated with sustained viral suppression. We provide a 2018 update, the latest nationally representative data in this area, as well as trends over time.

  • Insurer Participation on the ACA Marketplaces, 2014-2021

    Issue Brief

    For the third straight year, more insurers are entering the ACA Marketplaces or expanding their service area in 2021, creating more choices for consumers shopping for coverage during the 2021 open enrollment period.