Creep and shrinkage of concrete are essential for the safety assessment of large civil engineering structures. The present paper presents two different approaches to predicting the delayed strain considering a single material point to represent the structure. The first one is a decoupled approach, such as design codes, that splits the delayed strain into four components and predicts each of them as a function of several parameters such as concrete strength. In the second approach, delayed strain is modeled as the viscoelastic response of concrete to applied external loads and/or internal hygric stresses. The advantages and inconveniences of both methods are discussed. In the end, delayed strains of concrete are predicted using these approaches for two examples of real structures: a prestressed concrete bridge and a mock-up of a biaxially prestressed containment building.