More than a decade after its enactment, tens of millions of people nationwide rely on coverage options created through the Affordable Care Act of 2010 (ACA). The law has survived multiple court challeges at the U.S. Supreme Court and repeated attempts by Republicans in Congress to repeal it. Subsequent legislation has scaled back some aspects of the law and expanded others, including by the COVID-19 relief bill, the American Response Plan Act of 2021. This page highlights relevant analysis about the ACA and proposed and enacted changes to it..
For information about ACA Marketplace Open Enrollment, including fact sheets and 300+ FAQs, visit our collection of resources on Understanding Health Insurance.
Featured Affordable Care Act Resources

Potential Costs and Impact of Health Provisions in the Build Back Better Act
A summary of 10 of the major health coverage and financing provisions of the current Build Back Better Act, with discussion of the potential implications for people and the federal budget.
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Related Affordable Care Act Resources
- 5 Charts About Public Opinion on the Affordable Care Act
- A Closer Look at the Uninsured Marketplace Eligible Population Following the American Rescue Plan Act
- Eligibility for ACA Health Coverage Following Job Loss
- Pre-Existing Condition Prevalence for Individuals and Families
- Building on the Evidence Base: Studies on the Effects of Medicaid Expansion, February 2020 to March 2021
- FAQs: Health Insurance Marketplace and the ACA
- Explaining Health Care Reform: Questions About Health Insurance Subsidies
- Status of State Medicaid Expansion Decisions: Interactive Map
- Preventive Services Tracker
- Tracking Section 1332 State Innovation Waivers

How Marketplace Costs and Premiums will Change if Rescue Plan Subsidies Expire
In this Policy Watch we explore the potential impact of the expiration of the American Rescue Plan Act’s enhanced financial help and new eligibility for the Affordable Care Act’s health insurance Marketplace federal subsidies. While the COVID-19 relief legislation passed earlier this year provides greater subsidy assistance through 2022, Democrats in Congress are currently considering making the temporary federal help permanent or extending it as part of their planned budget reconciliation legislation.
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Data Note: Public’s Views of a National Health Plan
The Kaiser Family Foundation’s Health Tracking Poll from October 2017 asked the public of their views of a national health plan, and whether they favor or oppose the implementation of such a program. While about half of the public favors having a national health plan, there is a strong partisan divide with the majority of Republicans strongly opposing such a plan and nearly half of Democrats strongly favoring the plan. This poll also asked the public about their perceptions of the impact of a national health plan, and what they believe would be the best and worse thing about the plan.
Poll Finding Read MoreFactors Affecting States’ Ability to Respond to Federal Medicaid Cuts and Caps: Which States Are Most At Risk?
This issue brief examines the factors that could affect states’ ability to cope with reductions in federal Medicaid funding of the sort proposed in the House-passed American Health Care Act (AHCA), which would eliminate enhanced federal matching funds for the Affordable Care Act’s Medicaid expansion and convert Medicaid to a per capita cap or block grant system of financing.
Issue Brief Read MoreNext Steps for CHIP: What is at Stake for Children?
The Children’s Health Insurance Program (CHIP) is an important complement to Medicaid, covering 8.4 million children with family incomes above Medicaid eligibility limits who often lack access to affordable private coverage. Following are key facts that highlight what is at stake for children if there is a failure to extend CHIP funding beyond September 2017 and based on changes proposed in the American Health Care Act (AHCA), which would fundamentally restructure Medicaid by capping federal funding and eliminate longstanding federal protections and standards for children.
Fact Sheet Read MoreMap: Counties at Risk of Zero Insurers Offering Plans in the 2018 Marketplace
Ahead of the June 21 federal deadline for insurers to submit rates for healthcare.gov, the Kaiser Family Foundation has released a new map that will track counties at risk of zero insurers offering plans in the 2018 marketplace. Compiled from a Foundation analysis of insurer filings and news reports, the…
News Release Read MorePremiums under the Senate Better Care Reconciliation Act
This analysis provides estimates of how premiums, after taking into account tax credits, would differ in 2020 under the Senate’s Better Care Reconciliation Act (BCRA) vs. the Affordable Care Act (ACA) for people currently enrolled in the federal and state insurance marketplaces.
Issue Brief Read MoreHow the Senate Better Care Reconciliation Act (BCRA) Could Affect Coverage and Premiums for Older Adults
This brief explains the key provisions of the Senate’s Better Care Reconciliation Act (BCRA), and their effects on adults ages 50-64. The brief also discusses how changes to Medicaid could affect older, low-income adults, and how an increase in the number of uninsured older adults could have implications for the Medicare program in the future.
Issue Brief Read MorePublic Wants Republicans to Work with Democrats on Health Care
In this column for Axios, Drew Altman discusses a new poll finding showing substantial support for Republicans to drop repeal and work with Democrats on improving the Affordable Care Act, from the general public, Trump supporters, and Republicans.
Perspective Read MoreKaiser Health Tracking Poll – July 2017: What’s Next for Republican ACA Repeal and Replacement Plan Efforts?
As the U.S. Senate continues to debate their plan to repeal and replace the ACA, the latest Kaiser Family Foundation tracking poll finds the public souring on the effort with a growing majority opposed to the plan and a large share that say the plan does not fulfill most of the promises President Trump has made about health care. Even among Republicans, the poll finds that about half would be “less likely” to support the Senate health plan if they heard it would increase premiums for most people who purchase their own insurance on the marketplace. In addition, a majority of the public would rather see Republicans in Congress work with Democrats to make improvements to the ACA but not repeal the law. The tracking poll also gauges the public’s views on the proposed major reductions in federal funding for Medicaid as well as how these views are affected by counter-arguments.
Poll Finding Read MoreHow Many of the Uninsured Can Purchase a Marketplace Plan for Less Than Their Shared Responsibility Penalty?
For people who are uninsured and eligible for Affordable Care Act (ACA) marketplace plans, the analysis compares the cost of a premium for the lowest-cost bronze plan with the estimated individual mandate tax penalty for 2018. It finds that more than half (54% or 5.9 million) of the 10.7 million people could pay less in premiums for health insurance than they would owe as an individual mandate tax penalty for lacking coverage.
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