BackgroundAs a key aspect of poverty, material hardship describes day-to-day struggles in affording necessities. In explorations of policy initiatives that mitigate material hardship, evidence suggests direct income support can be effective in alleviating hardship. However, research investigating the long-term effects of income supports is limited, and it remains uncertain as to how benefit receipt may mitigate material hardship for families with children across time. MethodsTo explore the associations between income assistance and material hardship longitudinally, we utilised data from four waves of the Growing Up in New Zealand birth-cohort study (n = 5964), where family experiences were tracked between birth and adolescence. The variables of interest included mother-reported receipt of income benefits and material hardship from when the children were aged 9-months, 54-months, 8-years, and 12-years. Multilevel logistic regression analysis was employed to examine the associations between benefit receipt and material hardship in the short- and long-term. Interaction terms between benefit receipt and time were incorporated in the modelling to determine whether receiving benefits corresponded with significant changes in the likelihood of experiencing material hardship at specific time points. ResultsThe key results suggest that benefit receipt in early childhood reduced the likelihood of experiencing material hardship at subsequent time points at least until adolescence, when controlling for key sociodemographic characteristics. ConclusionThese findings provide insight into the associations between early childhood income supports and reductions in the likelihood of experiencing material hardship in the long-term, to emphasise the potential for such interventions to have longstanding effects. By elucidating the associations between benefit receipt and subsequent material hardship, this research gives direction for policy interventions and timely support for families.