Prominent in much Theology of Religions is the concept of fulfilment (the extension of the fulfilment of the Old Covenant by Christ, to the fulfilment of other religions by Christ). The three Catholic theologians who are the subject of this article – Jean Daniélou, Karl Rahner and Jacques Dupuis – rely heavily on the fulfilment concept in their understanding of the relationship between other religions and Christianity. However, each uses the concept differently. This article outlines and then compares the use of the fulfilment concept in the theology of these three prominent theologians, and in doing so develops a fulfilment typology.