Six studies show that majority members misperceive diversity policies as unbeneficial to their ingroup, even when policies benefit them. Majority members perceived nonzero-sum university admission policies-policies that increase acceptance of both URM (i.e., underrepresented minority) and non-URM applicants-as harmful to their ingroup when merely framed as "diversity" policies. Even for policies lacking a diversity framing (i.e., "leadership" policies), majority members misperceived that their ingroup would not benefit when policies provided relatively greater benefit to URMs, but not when they provided relatively greater benefit to non-URMs. No consistent evidence emerged that these effects were driven by ideological factors: Majority members' misperceptions occurred even when accounting for self-reported beliefs around diversity, hierarchy, race, and politics. Instead, we find that majority group membership itself predicts misperceptions, such that both Black and White participants accurately perceive nonzero-sum diversity policies as also benefiting the majority when participants are represented as members of the minority group. (PsycInfo Database Record (c) 2022 APA, all rights reserved).