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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

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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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  • Small Area Variations and the ACA’s Coverage Expansions

    From Drew Altman

    A new Kaiser analysis sheds light on how the country might react to the Affordable Care Act (ACA) when it is implemented.  It looks at how the benefits of the ACA's coverage expansions will vary around the country by census areas (technically, Public Use Microdata Areas, or PUMAs).  PUMAs are artificial areas of about 100,000 people each created by the Census Bureau to provide more detailed demographic, social and economic information at the local level.  They…

  • A Guide to the Supreme Court’s Decision on the ACA’s Medicaid Expansion

    Issue Brief

    On June 28, 2012, the U.S. Supreme Court issued its decision in the case challenging the Affordable Care Act (ACA). The Court upheld the constitutionality of the ACA's individual mandate, which requires most people to maintain a minimum level of health insurance coverage beginning in 2014. A majority of the Court also found the ACA's Medicaid expansion unconstitutionally coercive of states, while a different majority of the Court held that this issue was fully remedied…

  • Kaiser Health Tracking Poll: Election 2008 — April 2008

    Poll Finding

    An April 2008 poll finds that health care costs rank among Americans’ top personal economic problems, and their struggles to deal with those costs have affected both their financial well-being and their family’s health care.  Conducted by the Foundation’s public opinion researchers, the poll probes into the economic concerns facing Americans and the ways they have dealt with the cost of health care. Across a series of economic concerns, health care costs rank near the…

  • Kaiser Health Tracking Poll: Election 2008 – June 2008

    Poll Finding

    The latest Kaiser Health Tracking Poll: Election 2008 poll finds that the recent economic downturn continues to create serious financial problems for most Americans. When asked about the impact of recent economic changes, nearly six in 10 adults (59 percent) report having a "serious problem" with one of seven major financial issues, including one in four who cite paying for health care as a serious problem. Not surprisingly, with gas prices topping $4 per gallon…

  • Kaiser Health Tracking Poll: Election 2008 — September 2008

    Poll Finding

    The latest Kaiser Health Tracking Poll: Election 2008 finds that health care has crept up in importance as an election issue in recent months among a key voting group: political independents, who ranked it as highly as Democrats did in this poll.  Roughly one in four (26%) independents rank health care as one of the top issues they would "most like to hear the presidential candidates talk about." Health care's importance has risen among independents by…

  • The Decline in the Uninsured in 2007: Why Did It Happen and Can It Last?

    Issue Brief

    This policy brief examines the underlying shifts in health insurance coverage in 2007, which resulted in a 1.5 million decrease in the number of uninsured people under age 65, due to increased public coverage. This includes about 300,000 in Massachusetts, which implemented its comprehensive health reform that year. The brief also projects that the current economic downturn and rising unemployment rate likely will cause the number of uninsured to grow by at least 2 million…

  • Health Affairs Article: Beyond Incrementalism? SCHIP and the Politics of Health Reform

    Report

    This article examines the political and legislative history of the Children's Health Insurance Program and analyzes the lessons for policymakers who are contemplating broader health care reform. It was published online in the journal Health Affairs and was authored by Jonathan Oberlander, an associate professor, social medicine and health policy and management, at the University of North Carolina at Chapel Hill, and Barbara Lyons, a vice president of the Kaiser Family Foundation and deputy director…

  • Key Findings: Kaiser Health Tracking Poll — November 2009

    Poll Finding

    This document contains the key findings from the November Health Tracking Poll. The survey was designed and analyzed by public opinion researchers at the Kaiser Family Foundation and was conducted November 5 through November 12, 2009, among a nationally representative random sample of 1,203 adults ages 18 and older. Telephone interviews conducted by landline (802) and cell phone (401, including 112 who had no landline telephone) were carried out in English and Spanish. The margin…

  • Pulling It Together: The Message from Massachusetts

    Perspective

    The Massachusetts special election has roiled the political world and profoundly affected the prospects for health reform just when it looked like passage was a lock.  Efforts are underway to put health reform legislation back together again on Capitol Hill, but not since powerful Ways and Means Chair Wilbur Mills fell into the Tidal Basin with Fanne Foxe in 1974, halting momentum on a deal on health reform that seemed ready to happen, has something this unexpected so affected…

  • What the Actuarial Values in the Affordable Care Act Mean

    Issue Brief

    The Patient Protection and Affordable Care Act (PPACA) establishes four levels of coverage based on the concept of "actuarial value," which represents the share of health care expenses the plan covers for a typical group of enrollees. As plans increase in actuarial value – bronze, silver, gold, and platinum – they would cover a greater share of enrollees' medical expenses overall, though the details could vary across plans. The levels of coverage provided for in…