This paper assesses child care cost estimates from the 2010 Current Population Survey’s Annual Social and Economic Supplement (CPS ASEC). Although the CPS ASEC has asked whether or not households paid for child care since 2001, the 2010 CPS ASEC is the first to collect data on child care costs. The new cost estimates are compared to similar data from the Survey of Income and Program Participation (SIPP). Despite several limitations and important differences between the two surveys, the authors find that although differences in child care cost estimates between the CPS ASEC and the SIPP are significant, with noted exceptions, the differences are small in magnitude.