Branhamism rejects the Nicene doctrine of the Trinity, instead teaching Oneness theology rooted in the United Pentecostal Church tradition. According to this view, there is only one God—Jesus Christ—whose fullness is expressed in three manifestations or titles: Father (creator), Son (redeemer), and Holy Ghost (sanctifier). These are not three distinct persons but rather three functional roles of one absolute being.

William Branham taught that the Father, Son, and Holy Spirit are not co-equal persons but rather aspects of one God's nature and work. This position directly contradicts Nicene Christendom and aligns with Oneness Pentecostalism and early Modalism. Believers in the Message Movement maintain this Oneness position while adding Branham's specific eschatological and prophetic claims.