This paper examines work-limiting disability using the 1996 and 2001 panels of the Survey of Income and Program Participation. Nearly 10 percent of employed parents developed or had a recurring disability over the course of the panel. For about a quarter of this group, earnings dropped by more than 25 percent of family income, with other income sources offsetting only a small fraction of lost earnings. In addition, workers who hold health insurance policies through their employer were less likely to reduce hours worked or leave their job following disability onset, effects consistent with job lock.