Imputation

Imputation in biblical theology refers to the legal act of reckoning or crediting something to a person's account — treating it as belonging to them, whether or not it originated with them. The concept operates in both directions in Scripture. On one side, Adam's sin is imputed to all humanity: "by one man sin entered the world, and death through sin, so death spread to all men, because all sinned" (Romans 5:12). On the other, the faith of Abraham was imputed to him as righteousness (Genesis 15:6; Romans 4:3, 22), establishing the pattern of justification by faith apart from works.

The doctrine of the imputation of Christ's righteousness to the believer is central to the Pauline understanding of justification. God reckons to the sinner the perfect obedience of Christ, just as Christ bore the sin of the many. The Philemon reference (Philemon 1:18) provides a concrete illustration: Paul offers to have Onesimus's debt imputed to his own account. Reformed theology has developed the doctrine of imputation into a three-part structure — Adam's sin imputed to all, the sin of the elect imputed to Christ, and Christ's righteousness imputed to the elect — though the precise formulation has been contested across traditions.