Research on altruistic behaviour and associated anticipatory beliefs, as well as related gender differences, is limited. Using data from Chowdhury and Jeon, who vary a common show-up fee and incentivize recipients to anticipate the amount given in a dictator game, we find that the show-up fee has a positive effect on dictator-giving for both genders. While female dictators are more generous than males, male recipients anticipate higher amounts than the amount male dictators give. As the show-up fee increases, the female dictators become a more generous social type, whereas males do not show this effect. There is no gender difference in anticipation about dictator social type by the recipients.