Christadelphians explicitly deny the pre-existence of Jesus Christ as a personal divine being. Jesus did not exist before his conception in Mary's womb — he had no prior heavenly existence as a divine person. Before his birth, he existed only in the mind and purpose of God as the plan of redemption (the 'Word' of John 1 is interpreted as God's plan or purpose, not a pre-existent divine individual).

Christadelphians read John 1:1-14 as a prologue describing the divine plan (the Logos) that was 'with God' from eternity and was embodied in Jesus at his birth, rather than as a description of a divine person who personally became flesh. This interpretation is central to their Christology: Jesus is the human embodiment of God's eternal purpose, not the incarnation of a pre-existent divine being.

Other texts used to support pre-existence — such as John 8:58 ('Before Abraham was, I am') and Philippians 2:6 ('though he was in the form of God') — are interpreted differently by Christadelphians. John 8:58 is read as referring to Jesus' preordination in God's purpose (he was 'before Abraham' in God's plan), and Philippians 2 is understood as referring to Jesus' status as the image of God during his earthly ministry, not his pre-incarnate divine state. This denial of pre-existence is one of the most fundamental distinctions between Christadelphian theology and mainstream Christianity.