Social norms have been shown to have a great influence on human behavior, including the potential for facilitating beneficial behaviors. Previous literature in the academic performance field has found sex differences in compliance to social norms, indicating that women pay attention to injunctive norms (what is the right thing to do) whereas men are more attentive to descriptive norms (what most others are doing). The current study sought to investigate whether sex differences in norm compliance extend to the context of donating to charity. Participants were given injunctive and descriptive norm information about the Red Cross and allotted $100 to donate to the Red Cross, another similar charity, or to campus improvements. Contrary to our hypothesis, females’ donations and attitudes varied more according to the descriptive norm than males’ did. The injunctive norm had a significant effect on both donation amount and attitudes towards the normed charity. In addition, there was a significant interaction between injunctive and descriptive norms for donation attitudes. This research extends previous findings regarding sex differences in norm compliance but it also suggests that these differences are context dependent. The findings are discussed in terms of potential applications to other pro-social behaviors, specifically in situations where less popular behaviors have a greater positive outcome.