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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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  • Are Uninsured Adults Who Could Gain Medicaid Coverage Working?

    Fact Sheet

    As additional states consider whether to implement the ACA Medicaid expansion, some have raised pursuing waiver authority to tie Medicaid eligibility for adults under the expansion to work requirements. This fact sheet profiles uninsured adults who could gain Medicaid coverage under the ACA by their relationship to the workforce and job-based coverage.

  • An Overview of Actions Taken by State Lawmakers Regarding the Medicaid Expansion

    Fact Sheet

    The ACA Medicaid expansion has garnered different responses from statelawmakers - Democratics and Republicans as well as governors and legislatures. While it does not cover how every state has enacted the ACA Medicaid expansion, this fact sheet highlights some of the different actions state lawmakers have taken in response to the ACA Medicaid expansion.

  • Trends in Medicaid Spending Leading up to ACA Implementation

    Issue Brief

    This paper presents data on Medicaid spending during the years leading up to the implementation of the Affordable Care Act (ACA). It uses administrative data to first examine overall spending trends and trends by service type. We then draw on additional data to analyze per enrollee spending growth during this period, both by service type and by eligibility group, to understand what drove Medicaid spending.

  • New Reports Analyze Cost Sharing in 2015 ACA Marketplace Plans in 37 States

    News Release

    Charts Examine Savings from Subsidies at Stake in U.S. Supreme Court Case Cost-sharing subsidies under the Affordable Care Act can substantially reduce deductibles and other cost sharing for people with low incomes purchasing coverage in the federally-facilitated insurance marketplace serving 37 states, a new analysis by the Kaiser Family Foundation finds. These government subsidies, which are also available in plans sold on state-run marketplaces, are different from premium tax credits. Both are at stake in…

  • The Cost of Care with Marketplace Coverage

    Issue Brief

    This brief and accompanying slides examine cost sharing - deductibles, copayments and coinsurance - in 2015 insurance plans sold on the Affordable Care Act's (ACA) federally-facilitated marketplaces. The analysis looks at out-of-pocket limits, as well as cost sharing for hospital stays, physician visits, emergency room visits, and prescription drugs, for plans across the metal levels (platinum, gold, silver and bronze).

  • Safety-Net Emergency Departments: A Look at Current Experiences and Challenges

    Issue Brief

    Safety-net hospital emergency departments (EDs) are an important part of our health care system, especially, but not only, for the uninsured and others with low income. With multiple major changes unfolding in our system today, including the development of new models of health care delivery, payment reforms, expanded insurance coverage, and increasing demand for primary care access, safety-net EDs are a sort of crucible in which these shifts and transitions can be seen playing out.…

  • Medicare Spending Peaks at Age 96  

    News Release

    In his latest column for The Wall Street Journal's Think Tank, Drew Altman discusses the implications of a Kaiser finding: per capita Medicare spending peaks at age 96, and the main reason is not end-of-life care. All previous columns by Drew Altman are available online.

  • Visualizing Health Policy: Premium Changes in the Affordable Care Act’s Insurance Marketplaces 2014-2015

    News Release

    This Visualizing Health Policy infographic illustrates the change in monthly premiums by county, and select cities, from 2014 to 2015 for a 40-year-old person covered by the second-lowest-cost silver “benchmark” plan in the Affordable Care Act’s insurance marketplaces. Premium changes were greatest in Summit County, Colo. (45% decrease) and southeastern Alaska (34% increase), before tax credits. After accounting for tax credits, premiums for a 40-year-old person with an annual income of $30,000 would remain flat in…