Messianic Judaism practices two principal ordinances using Jewish forms and theology. The mikveh (ritual immersion pool) is used for the baptism of adult believers upon their profession of faith in Yeshua. This is understood as a covenantal sign of death to sin and resurrection to new life in Messiah, drawing on Jewish purification practices and New Testament baptism. The mikveh is not understood as regenerative in itself but as an outward sign of inward faith.

The Lord's Supper is observed in the context of the Passover seder, the traditional Jewish Passover meal, with leavened and unleavened bread, wine, and the recitation of the Passover narrative. The cup of redemption and the bread are understood as symbols of Yeshua's body and blood, fulfilling and transforming the original Exodus commemoration. Additional Jewish observances, such as Havdalah (the blessing separating the Sabbath from the week), may be incorporated into spiritual practice. These ordinances are central to Messianic Jewish identity and worship.