This paper describes the consideration of cost characteristics which can arise due to performance deviations and the general statements that can be made about costs during a delayed execution of construction works, an extended execution of construction works and an accelerated execution of construction works. As a basis the cost structures of the general business economics are used. This cost structures are transfered to the cost categories of the building industry. The cost structures of the building industry are analysed in their cost characteristics and how they depend on their utilization. Furthermore, reasons for the occurrence of performance deviations are explained. Separate cost categories are analysed for the delayed, the extended and the accelerated execution of construction works regarding the personnel costs, the material costs, the equipment costs, the costs of external services, the construction sites overheads and the construction interest costs. The results of the separate cost categories are shown in a table. Finally, a comparison between the cost trend of an extension of the construction period and an acceleration of the construction period is carried out. As a result, it is obvious that the costs of an extension generally increase proportionally, and the costs of an acceleration generally increase progressively. An additional result is that if the time bound construction sites overhead costs aggregate a big portion of the over all costs, an acceleration can be cheaper than an extension for a certain extension of time. When the extension of time increases there will be a break-even-point due to the progressive increase of the acceleration costs. From that point onwards, an extension is cheaper than an acceleration in general. To proof these findings a simple calculation example is accomplished.