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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

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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  • Individual Market Insurers Are Expecting to Pay a Record $800 Million in Rebates to Consumers for Excessive Premiums in 2018

    News Release

    Individual market insurers are expecting to return to consumers a record total of about $800 million in excess premiums for 2018, a year in which the insurance companies posted their best annual financial performance under the Affordable Care Act to date, finds a new KFF analysis. The rebates to more than 3 million eligible individual market consumers, based on preliminary estimates by insurers, must be issued by September 30. They are the result of the…

  • “Partial Medicaid Expansion” with ACA Enhanced Matching Funds: Implications for Financing and Coverage

    Issue Brief

    The Affordable Care Act (ACA) provides enhanced federal matching funds to states that expand Medicaid to nonelderly adults up to 138% of the federal poverty level (FPL, $17,236/year for an individual in 2019). The ACA enhanced match (93% in 2019, and 90% in 2020 and thereafter) is substantially higher than states’ traditional Medicaid matching rate. A few states have sought Section 1115 demonstration waiver authority from the Centers for Medicare and Medicaid Services (CMS) to…

  • Analysis: Marketplace Plans Denied an Average of Nearly One in Five Claims in 2017 with Wide Variations across Insurers

    News Release

    Healthcare.gov marketplace insurers denied nearly one out of every five claims (19%) submitted for in-network services in 2017, and enrollees only appeal a tiny share (0.5%) of those denied claims, a KFF analysis of recently released claims data finds. The analysis finds a huge variation across insurers, with average denial rates as low as 1 percent and as high as 45 percent. Denial rates also vary across states, though individual insurers in the same state…

  • Short-Term Health Insurance Plans Charge Less than Half as Much in Premiums as ACA Plans By Excluding Pre-Existing Conditions and Severely Limiting Benefits

    News Release

    Short-term health insurance plans offer a trade-off for consumers: substantially lower premiums than plans that comply with the Affordable Care Act, but much less protection if they get sick and need care. Just how much cheaper are the premiums and what are consumers giving up to get them? A new KFF (Kaiser Family Foundation) analysis finds short-term plans are able to charge premiums 54 percent lower than ACA-compliant plans, by excluding pre-existing conditions and severely…

  • Study Finds Recent Slowdown in Health Spending Growth Mostly Tied to the Economy

    News Release

    Growth Expected To Move Towards Historical Levels In Coming Years As the Economy Recovers A new Kaiser Family Foundation analysis of how the economy affects the nation’s health spending concludes that the record slow growth rate of recent years stems largely from economic factors beyond the health system, with the economy explaining 77 percent of the slowdown, and more rapid growth expected in coming years if the economy strengthens as expected. Based on statistical modeling…

  • Health Reform Implementation Timeline

    Interactive

    The health reform implementation timeline is an interactive tool designed to explain how and when the provisions of the Affordable Care Act will be implemented over the next several years.

  • The California Endowment and the Kaiser Family Foundation Release “Health Reform Hits Main Street” Animation in Spanish

    News Release

    Health Reform Explained – En Español  MENLO PARK, Calif. (January 12, 2012) – Today, The California Endowment and the Kaiser Family Foundation are releasing a Spanish-language version of “Health Reform Hits Main Street,” the popular animation that explains the major provisions of the Affordable Care Act. Written and produced by the Kaiser Family Foundation, the Spanish-language version of the animated movie features narration by a partner of The Endowment, Dra. Isabel Gómez-Bassols, psychologist and host…