The 2025 reconciliation bill mandates that Medicaid expansion enrollees meet work requirements as a condition for enrolling in and retaining Medicaid and also expands work requirements for the Supplemental Nutrition Assistance Program (SNAP). For Medicaid, work requirements are a major policy shift for the 60-year-old health insurance program. Many other programs, like Temporary Assistance for Needy Families (TANF), already mandate work. Evidence from existing and previous work requirements and projected effects of new policies can inform federal and state officials and other stakeholders as they respond to these policy changes. We are continuing to explore lessons from research about work requirements, estimating who could be affected by these policy changes, and studying implementation and impacts.