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The ACA Marketplace

2025 KFF Marketplace Enrollees Survey

In 2025, about one in three ACA enrollees said they would be “very likely” to look for a lower-premium Marketplace plan If their premium payments doubled.

Cost Concerns and Coverage Changes: A Follow-Up Survey of ACA Marketplace Enrollees

Following the expiration of the enhanced premium tax credits for people with Affordable Care Act (ACA) Marketplace plans, a new KFF follow-up survey of the same Marketplace enrollees KFF surveyed in 2025 finds half (51%) of returning enrollees say their health care costs are “a lot higher” this year compared to last year, including four in 10 who specifically say their premiums are “a lot higher.”

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POLLING

Tracking the Public’s Views on the ACA

While overall opinion of the Affordable Care Act has been more favorable than unfavorable since 2017, there remain deep partisan divides. See how public opinion on the ACA has changed from the inception of the law to the present. This interactive tool highlights key moments when views shifted and trends based on party identification, income, age, gender, and race/ethnicity.
DATA

Marketplace Enrollment is Down in 2026—But All of the Data Isn’t in Yet

ANALYSIS

Higher Premium Payments or Higher Deductibles: The ACA's Tradeoffs

QUIZ

Test Your Knowledge of the Affordable Care Act

ANALYSIS

Competition Increased in Individual Market But Fell in Fully Insured Group Markets

Timely insights and analysis from KFF staff

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  • States with Section 1115 ACA Expansion Waivers, December 2015

    Feature

    This slide shows the current status of state decisions to use Section 1115 waivers to expand Medicaid. A total of 31 states including DC have adopted the ACA Medicaid expansion, including 6 states with ACA 1115 ACA expansion waivers. AZ has a pending waiver application that seeks changes to its expansion. MT and NH’s waivers will take effect on 1/1/16. PA originally expanded through a waiver but subsequently transitioned to a state plan amendment. TN and UT have debated waiver proposals which have not been approved by their state legislatures or submitted to CMS.

  • How Have State Medicaid Expansion Decisions Affected the Experiences of Low-Income Adults? Perspectives from Ohio, Arkansas, and Missouri

    Issue Brief

    This brief examines the experiences of low-income adults in three states that have made varied Medicaid expansion decisions: Ohio, which adopted the ACA Medicaid expansion, Arkansas which implemented the Medicaid expansion through a “Private Option” waiver, and Missouri, which has not adopted the expansion. While Arkansas and Ohio implemented the expansion in different ways, participants in both states described how obtaining coverage improved their ability to access care, contributing to improvements in their ability to work and family relationships. In contrast, participants in Missouri remained uninsured limiting their ability to obtain needed care, creating significant stress and anxiety in their lives, and interfering with their ability to work and care for their families.

  • The ACA and People with HIV: Profiles from the Field

    Issue Brief

    This brief provides profiles of twelve individuals living with HIV to offer an in-depth look at how the Affordable Care Act (ACA) has affected their healthcare and coverage. Participants live in California, Florida, Georgia, New York, and Texas and discuss their enrollment and coverage experience, including whether they got new coverage (in the Marketplace or Medicaid), how their HIV care has been affected, and the role of the Ryan White HIV/AIDS Program.

  • New Evidence Health Spending Is Growing Faster Again

    From Drew Altman

    In this column for The Wall Street Journal’s Think Tank, Drew Altman discusses new Census Department survey data showing higher health spending growth over the last four economic quarters, and raises the question: is the health spending slowdown over?

  • New Evidence Health Spending Is Growing Faster Again

    News Release

    In his latest column for The Wall Street Journal’s Think Tank, Drew Altman discusses new Census Department survey data showing higher health spending growth over the last four economic quarters, and raises the question: is the health spending slowdown over? All previous columns by Drew Altman are available.

  • The ACA and People with HIV: Profiles from the Field

    News Release

    New in-depth profiles of 12 people with HIV highlight how the Affordable Care Act’s coverage expansions impacted their access to coverage and care. While some experienced serious bumps along the way, those who gained coverage through Medicaid and the Marketplaces were largely able to meet both their HIV and non-HIV care needs.

  • Medicaid Delivery System and Payment Reform: A Guide to Key Terms and Concepts

    Fact Sheet

    There is wide state variation in Medicaid health care delivery and payment systems, as states design and combine service delivery models and payment approaches in a multitude of ways. To help those interested in understanding the diversity of Medicaid reform initiatives underway or in development in states across the country, this guide defines key terms.