Working married mothers often make work-related accommodations to help rear their young children, which may include reducing work hours, taking a pay cut, or dropping out of the labor force. These actions may exacerbate negative labor force outcomes for working married mothers and wage differences between working spouses. Since the high cost of paid child care may lead to these work-related accommodations, child care subsidies, like the Child Care Development Fund (CCDF) for low-income families, may prevent these accommodations from occurring and improve labor force outcomes for married working mothers. Using unique data from the CCDF administrative records and Social Security Administration’s Detailed Earnings Records linked to the Current Population Survey, Annual Social and Economic Supplement (CPS ASEC), this study estimates the average treatment effect of CCDF subsidy receipt on whether working married mothers remain in the labor force and whether receipt reduces spousal pay differences four years later. Using propensity score matching (PSM) as well as inverse probability weighting with regression adjustment (IPWRA) to account for selection effects, there is robust support that CCDF receipt increases the probability that working married mothers stay in the labor force. There also is support from the doubly robust IPWRA models that CCDF receipt helps working married mothers earn a more equitable proportion of the household’s total earnings. (author abstract)