The federal Build Back Better Act proposes a historic investment in the care of infants and toddlers that increases access and affordability by raising income eligibility levels in many states, capping family copayments, and setting provider reimbursement rates based on the cost (not price) of providing care. Research on the impact of the receipt of child care subsidies and state spending on subsidies show a positive impact on families’ access to needed services, the ability of parents to work, and families’ ability to have sufficient household resources.