Dual-system families, those involved with the child welfare system and receiving public cash assistance, may be more vulnerable than families only connected to either of the two systems. This study advances our understanding of the heterogeneous and dynamic cash assistance histories of dual-system families in the post-welfare reform era. With merged administrative data from [state name removed] over the period 1998 to 2009, we use cluster analysis to group month-to-month sequences of cash assistance use among households over the 37-month period surrounding child removal. Close to two thirds of families who received any assistance either had a short spell of Temporary Assistance for Needy Families (TANF) or lost TANF. Smaller percentages had steady support. Families who lose assistance are less likely than average to reunify while those who connect to benefits are more likely, suggesting coordination between systems may serve dual-system families well.