We study the labor market impact of unplanned pregnancy among women using long-acting reversible contraceptives to delay pregnancy. While most women successfully delay, some have unplanned pregnancies, providing quasi-random variation in pregnancy timing. Analyzing linked health and labor market data from Sweden, we find that unplanned pregnancies halt women’s career progression, resulting in income losses of 19% five years later. We find similar effects of unplanned births among women using short-acting reversible contraceptives. Using pregnancy as an instrument for birth in a dynamic treatment effect framework, effects of unplanned children are more detrimental for younger women and those enrolled in education.