U.S. enrollment in Affordable Care Act marketplace health insurance plans increased from about 11 million in 2020 to more than 24 million in 2025, largely driven by expanded premium tax credits.
January 01, 2025
high
temporal
Enrollment change in ACA marketplaces associated with expanded premium tax credits.
A 2025 KFF Health News analysis estimated that without Affordable Care Act premium tax credits, the average ACA marketplace premium would increase by about 114%.
January 01, 2025
high
temporal
Estimated percentage increase in average ACA marketplace premiums if premium tax credits were removed.
The American Rescue Plan Act authorized expanded Affordable Care Act premium tax credits in 2021.
January 01, 2021
high
temporal
Legislative change that expanded ACA premium tax credits.