While some suggestions have been made as to how the duty to undertake humanitarian intervention should be assigned to specific states, the question of how to assign the duty to carry the economic and material costs remains underexplored. In this paper, I argue that the most plausible answer to this question is found in a pluralist approach. First, we should look to the Contribution to Problem Principle, according to which the costs are shared based on the historical responsibility of states (...) for the occurrence of atrocities. For the many cases where this principle does not apply or needs to be supplemented, I suggest a novel alternative in the Entitlement-adjusted Ability Principle, according to which costs should be distributed based on states' levels of resources that have been tainted by historical rights violations. (shrink)