The credit has been based on a max of $3k in child care expenses per child (up to two) since 2001, so you are right that it hasn't kept up with inflation. Actually, it didn't cover the cost of care in 2001 either. A look into the Congressional Record shows that there were (and are) policymakers who balked at adjusting the amount because they believed that mothers should stay home to care for their children. Well, that worked in 1901, and maybe 1951, but here we are in 2025.