Seventh Day Baptists affirm penal substitutionary atonement as the primary understanding of Christ's death on the cross. Christ honored God's law through his perfect obedience and made a full atonement for human sins through his substitutionary death. Jesus bore the penalty and wrath of God in the place of sinners, satisfying divine justice and securing redemption for all who believe.

The SDB Statement of Belief emphasizes that Christ's death was not merely exemplary or morally influential but was genuinely vicarious — he died in our stead. Through faith in Christ, believers receive the forgiveness and righteousness their sin deserves. The resurrection of Christ demonstrated that the atonement was accepted by God and was efficacious for salvation.

This understanding of the atonement stands in continuity with the wider Baptist and evangelical tradition, though SDB theologians, like other Baptists, may vary on whether Christ's atonement is limited in scope (to the elect) or unlimited (though applied only to believers). All SDB teaching affirms the centrality of substitutionary atonement.