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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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  • New Report Provides State-Level Data on Coverage Gains and Costs of the Medicaid Expansion in Health Reform

    News Release

    Analysis Projects Steep Decreases in Uninsured, With Federal Government Covering Vast Majority of CostsWASHINGTON -- The expansion of Medicaid under the new health reform law will significantly increase the number of people covered by the program and markedly reduce the uninsured in states across the country, with the federal government picking up the overwhelming majority of the cost, according to a state-by-state analysis released today by the Kaiser Family Foundation’s Commission on Medicaid and the Uninsured (KCMU).…

  • Chartpack: Kaiser Health Tracking Poll — July 2009

    Poll Finding

    This document contains the chartpack from the July Health Tracking Poll. The survey was designed and analyzed by public opinion researchers at the Kaiser Family Foundation and was conducted July 7 through July 14, 2009, among a nationally representative random sample of 1,205 adults ages 18 and older. Telephone interviews conducted by landline (800) and cell phone (405, including 126 who had no landline telephone) were carried out in English and Spanish. The margin of…

  • Quick Take: Medicaid: 3 Key Issues to Watch in 2013

    Fact Sheet

    2013 will be a historic year for Medicaid with the implementation of major provisions to expand coverage and streamline enrollment in the Affordable Care Act (ACA) less than a year away, a surge in activity around care delivery reforms that seek to improve care and potentially reduce costs, and the unfolding of fiscal developments at the state and federal level. Today, Medicaid provides health and long-term care coverage to more than 60 million low-income children,…

  • Harvard and Growth in Health Care Cost Sharing

    From Drew Altman

    In this column for The Wall Street Journal's Think Tank, Drew Altman explains why recent discussion of Harvard University’s introduction of new health insurance cost sharing measures amounted to “making a mountain out of a mole hill”.

  • Abortion Coverage in Marketplace Plans, 2015

    Issue Brief

    This brief analyzes state policies and insurer coverage decisions affecting the availability of abortion coverage in 2015 insurance plans offered through the Marketplaces. It finds that abortion coverage is unavailable in a total of 31 states, 24 of which have enacted laws that ban or restrict abortion coverage in plans sold through their Marketplaces and 7 of which have no abortion coverage restrictions but also have no Marketplace plans offering it.

  • Proposed Medicaid Expansion in Tennessee

    Fact Sheet

    This fact sheet describes Tennessee’s 1115 waiver demonstration project, Insure Tennessee, which expands the State’s Medicaid program under the Affordable Care Act.

  • 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).

  • New Kaiser Survey Finds Eleven Million Newly Insured Adults As of Mid-December, But Nearly Half Who Remained Uninsured One Year After Full Implementation of the Affordable Care Act Were Eligible for Medicaid or Marketplace Tax Credits

    News Release

    Many Of The Remaining Uninsured Say They Didn’t Seek Coverage or Considered It Too Expensive, While Others Were Told (Or Believed) They Were Not Eligible About 11 million adults had become newly insured under the Affordable Care Act by mid-December 2014, according to a new national survey of more than 10,000 adults by the Kaiser Family Foundation.  Nearly half of the approximately 30 million adults who remained uninsured were eligible for assistance under the law,…

  • 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.

  • 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.