Open enrollment for Affordable Care Act marketplace plans in most U.S. states begins on November 1 each year.
November 01, 2025
high
temporal
Annual start date for ACA marketplace open enrollment windows in most states.
Over 20 million people use Affordable Care Act (ACA) subsidies to make their health insurance more affordable.
October 08, 2025
high
temporal
Describes the scale of ACA premium subsidy usage.
The Affordable Care Act (ACA), often called Obamacare, includes premium tax credits (subsidies) that lower health insurance premiums for people who purchase coverage through health insurance marketplaces.
October 08, 2025
high
definition
Describes the role of premium tax credits within the ACA marketplace framework.
Open enrollment for the federal ACA health insurance marketplaces typically begins on November 1 each year.
October 08, 2025
high
temporal
States the common annual start date for ACA marketplace open enrollment.
In 2025, roughly 24 million people were enrolled in Affordable Care Act (ACA) marketplace coverage in the United States.
October 07, 2025
high
statistical
Aggregate enrollment size for ACA marketplace plans reported during the 2025 open enrollment period.
As of October 7, 2025, a record 24 million people were enrolled in insurance coverage through the Affordable Care Act (ACA) marketplaces.
October 07, 2025
high
temporal
Enrollment total for ACA marketplace coverage reported contemporaneously with ongoing policy debates.
Higher premium subsidies for Affordable Care Act (ACA) marketplace plans were first implemented in 2021 as part of COVID-19-era policy changes.
March 11, 2021
high
temporal
Federal policy expansion that increased premium assistance for marketplace enrollees.
The Affordable Care Act (ACA) was signed into law on March 23, 2010.
March 23, 2010
high
temporal
Foundational U.S. federal health care law often referred to as 'Obamacare'.