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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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  • Key State Policy Choices About Medical Frailty Determinations for Medicaid Expansion Adults

    Issue Brief

    This issue brief answers 3 key questions and provides new data about state medical frailty determinations, which are assuming greater importance as more states adopt restrictive Section 1115 waivers that exempt medically frail enrollees from policies such as work requirements and premiums. The findings are excerpted from our 50-state survey on Medicaid financial eligibility for seniors and people with disabilities.

  • Analysis: ‘Cadillac Tax’ on High-Cost Health Plans Could Affect 1 in 5 Employers in 2022

    News Release

    A new KFF analysis estimates that the Affordable Care Act’s tax on high-cost health plans would affect one in five (21%) employers offering health benefits when it takes effect in 2022 unless employers change their health plans. An even larger share (31%) could be affected when workers’ voluntary contributions to Flexible Spending Accounts are taken into account. The analysis comes as some in Congress are proposing to repeal the ACA’s tax on high-cost health plans,…

  • KFF Poll: Public Opinion and Knowledge on Reproductive Health Policy

    Poll Finding

    The latest KFF Poll examines the public’s attitudes towards different facets of reproductive health care in light of recent policy changes made by the Trump administration. This poll examines attitudes towards major changes to the Title X program and attitudes toward state-level laws restricting abortions after a fetal heartbeat has been detected. The poll also looks at public awareness of provisions related to women’s health that are part of the 2010 Affordable Care Act.

  • 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…