Although sharing is often considered a virtuous behavior, individuals rarely share all their extra resources with those less fortunate. The current research investigated conditions under which children believe that someone who has more resources deserves to keep them rather than address an inequality. Specifically, we contrasted resources acquired via merit, windfall, and parental allocations. Across two studies, we showed 5- and 6-year-old children (n = 59), 8- and 9-year-old children (n = 120), and adults (n = 163) three scenarios in which one person acquired more resources than the other due to luck, due to merit, or because that person’s parents gave him or her more, and we asked whether that person should share these resources or keep all of them. Results suggested that adults differentiated both the family resource and the merit conditions from the windfall allocation, believing that an agent deserves to keep the extra resources more when they are acquired through one’s family or due to merit. However, children did not differentiate family resources from windfall, although they were more likely to believe that individuals deserve to keep their extra resources when they were acquired through merit. The type of the resource (i.e., money vs. balls) did not affect participants’ sharing decisions. Overall, these findings suggest that over development the resources acquired from one’s family come to be seen as more deserved than windfall resources.