Medicaid work requirements start by January 1, 2027 for 18.5 million adults; CBO expects about 5 million of them to lose coverage

What happened

The 2025 reconciliation law, Public Law 119-21, conditions Medicaid coverage for adults in the Affordable Care Act expansion group on at least 80 hours a month of work or other qualifying activity, beginning December 31, 2026, or sooner at a state's option [2]. An analysis in Health Affairs Scholar puts the start at January 1, 2027 and counts 18.5 million enrollees ages 19 to 64 who are potentially subject to it [1].

Why it matters

The expansion group is adults with incomes below 138 percent of the federal poverty level, which is where many young adults in part-time, gig or seasonal work land [1]. The Congressional Budget Office projected that the requirement alone would leave 4.8 million more people uninsured in fiscal year 2034 and reduce federal outlays by about $344 billion over ten years [2].

Enrollees can comply by working at least 80 hours a month, earning at least $580 a month, attending school at least half time, volunteering 80 hours, or combining activities to reach 80 hours [1].

The evidence

CRS summarizes CBO's estimates for the Medicaid title as a whole at 7.8 million more uninsured in 2034 and $840.2 billion in lower federal spending over 2025 to 2034, with the community engagement requirement the largest single piece [2].

The Health Affairs Scholar authors list the statutory exemptions, including parents of children 13 or younger, people who are medically frail, pregnant and postpartum women, veterans with a total disability rating, and former foster youth under 26, and state that CBO projects nearly 5 million of the 18.5 million subject will lose coverage [1].

Response and counterpoints

Supporters of the requirement describe it as a condition that able-bodied adults work, study or serve in exchange for coverage, and the law exempts people who are caring for young children or who are medically frail [1]. The CBO and CRS figures are projections of the House-passed text, and states may implement earlier than the federal deadline [2].

What remains uncertain

CBO's estimates were made for the House-passed bill in June 2025; the enacted text differs in places and the agency's later estimates for the enacted law are not what is cited here [2]. The Health Affairs Scholar authors could not estimate four exemption categories, so the 18.5 million figure is an upper bound of people potentially subject, not a count of people who will have to report [1]. The requirement has not yet taken effect, so there are no actual disenrollment figures.

Sources cited

1. [1]
   Who is subject to Medicaid work requirements under the One Big Beautiful Bill Act, and who is exempt — Health Affairs Scholar (Oxford University Press), 2026-08-24.

   supports · Abstract and results: 18.5 million enrollees in the ACA new adult group potentially subject; start date January 1, 2027; 80 hours per month or $580 in monthly earnings, half-time enrollment or volunteering; CBO projection that nearly 5 million of the 18.5 million will lose coverage; exemption list (parents of children 13 or younger, medically frail, pregnant and postpartum women, veterans with total disability rating, and others); published August 24, 2026, corrected September 11, 2026 · checked 2026-10-28 · source N-medicaid-work-01
2. [2]
   Medicaid Provisions in the House-Passed Reconciliation Bill (H.R. 1), with CBO estimates — Congressional Research Service, R48569, 2025-06-13.

   supports · Section 44141 description (begin December 31, 2026, or sooner at state option; at least 80 hours per month); CBO estimate table (community engagement requirement: 4.8 million more uninsured in FY2034; outlays -$344,040 million FY2025-FY2034); summary (Medicaid provisions overall: 7.8 million more uninsured in FY2034; $840.2 billion lower federal outlays) · checked 2026-10-28 · source N-medicaid-work-02