The paper deals with the difference between project and final prices of construction contracts in the public sector. The project price of construction contracts is usually created using price systems, while the final prices of contracts are based on the actual interest of construction companies in the implementation of a given contract, actual cost, and the state of the market for construction works and materials. The paper presents an analysis of a total of 1,021 construction contracts awarded by the public sector in the Czech Republic in 2019-2020. These contracts are divided according to the predominant nature of the work into three categories, namely demolition, reconstruction, and construction. The authors conclude that the project and final prices of construction contracts differ, both in terms of regional destination and the nature of the subject of the contract (construction, demolition, etc.). The biggest savings were found in contracts dealing with demolition work, where secondary income can be expected in the form of sales of secondary raw materials. Moderate savings are also achieved in the case of contracts concerning reconstruction or construction.