Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for performing tip-pooling aggregation and distribution. In some implementations, data is extracted from a plurality of different data sources. The data is normalized to a same format. The normalized data, which is attributed to a remote identifier, is indexed to an identifier representing a same source as the remote identifier. Portions of the normalized data indexed to the same contribution source are allocated to buckets based on a contribution period and a role for the same contribution source and a rule applicable to the contribution period. Portions of the normalized data indexed to different contribution sources are aggregated in the buckets to different contribution sources according to the allocation rule. The aggregated portions of the normalized data are assigned to targets based on assignment rules applicable to the buckets and distribution targets active during the contribution period.