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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

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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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  • Pulling it Together: The “Third School” for Controlling Health Care Costs?

    Perspective

    For as long as I have been in the field, there have been two dominant schools of thought about how to control health care costs. One school, The Regulators, believed that the best way to slow increasing costs was to control the total resources going into the health care system: putting limits on the supply of medical professionals, technology and facilities; setting payment rates; or putting enough purchasing power in the hands of government to…

  • Summary of Coverage Provisions in the Patient Protection and Affordable Care Act

    Issue Brief

    This short summary describes the health coverage provisions contained in the final version of the Affordable Care Act signed into law in March 2010, including the individual mandate requirements, expansion of public programs, health insurance exchanges, changes to private insurance and employer requirements.

  • Explaining Health Reform: Key Changes in the Medicare Advantage Program

    Issue Brief

    This brief examines the changes in the 2010 health reform law affecting the Medicare Advantage program, which gives beneficiaries the option of enrolling in private insurance plans for their Medicare benefits, instead of the traditional fee-for-service program. The reform law will gradually reduce Medicare payments to these plans to bring the average payment closer to the costs of traditional fee-for-service Medicare, while rewarding plans with high-quality ratings. The brief also describes new benefit requirements for…

  • West vs. South: Regional Differences in Views of the Health Reform Law

    Poll Finding

    This Data Note examines regional variations in public opinion of the health reform law based on the November 2010 Kaiser Health Tracking Poll. The analysis takes a special look at the Western and Southern regions of the country, where many states are likely to see the biggest increases in coverage under the law, and which stand to be disproportionately eligible for federal Medicaid funds. Despite these similarities in how the two regions might be affected,…

  • Resources Examine Recession-Driven Record Medicaid Enrollment and Assess Medicaid Spending Growth

    Fact Sheet

    Three papers from the Foundation's Commission on Medicaid and the Uninsured examine Medicaid enrollment and spending during the recent recession. The analyses show Medicaid enrollment rose above 50 million people nationally for the first time in 2010, reflecting the program’s counter-cyclical role of helping people who become uninsured when the economy falters, with many turning to Medicaid after losing jobs and employer-based health insurance. Without access to Medicaid coverage, millions more people who suffered economic…

  • State Budgets Under Federal Health Reform: The Extent and Causes of Variations in Estimated Impacts

    Issue Brief

    This analysis examines the potential costs and savings that the health reform law may generate for state budgets, a topic of great interest at a time when states continue to struggle with tight budgets in the wake of the recession. The analysis seeks to explain why recent state estimates of the likely impact of health reform on their budgets vary widely, and discusses the major expected sources of costs and savings as the new law…

  • Financial Alignment Models for Dual Eligibles: An Update

    Issue Brief

    The nearly nine million dual eligibles who receive both Medicare and Medicaid benefits are a high cost, high need population, accounting for a disproportionate share of expenditures relative to their enrollment in both programs. In April 2011, the Centers for Medicare and Medicaid Services (CMS) announced the award of design contracts to 15 states to develop service delivery and payment models to integrate care for dual eligibles. CMS and the participating states have recognized that…

  • Key Issues to Consider for Outreach and Enrollment Efforts under Health Reform

    Issue Brief

    The Affordable Care Act will significantly expand health coverage opportunities through an expansion in Medicaid and the creation of new health insurance exchanges in 2014. Effective outreach and enrollment efforts will be vital for assuring the expansions translate into increased coverage. Based on a discussion with federal and state officials and experts, this report identifies key issues to consider with regard to outreach and enrollment under reform. The discussion was part of an ongoing series…

  • Articles Examine Data and Issues For Expanding Integrated Care Models For Dual-Eligible Beneficiaries

    Report

    As state and federal policymakers move to develop and test integrated care models for people dually eligible for Medicare and Medicaid, two new Kaiser Family Foundation articles in the June 2012 issue of Health Affairs highlight the diverse needs and challenges facing these 9 million beneficiaries, describe their current care arrangements, and raise issues to consider for proposed reforms aimed at better coordinating their care and reducing health care spending. The first highlights the diversity…

  • Vermont Health Care Reform Plan

    Fact Sheet

    On May 25, 2006, Vermont Governor Jim Douglas signed into law comprehensive health care reform legislation. The plan is designed to increase access to affordable health care while reducing cost through quality improvement measures. The plan requires employers to provide or help finance coverage for their workers. For individuals, participation in the new coverage program is voluntary, though the state legislature will reevaluate the need for an individual mandate if 96 percent of state residents…