From the civil projects, there is from the beginning of the project, a need for a financial picture of the work. In the beginning it will be a 1st indication of the cost, while ongoing the design process there are more and more details that ca be discussed about of the specific costs.
By making use the CROW publication 137, also called the SSK system, there is clear insight and with which costs a client must include.
Besides obvious direct construction cost calculations are based on overheads, risk aspects (named or unnamed) and various additional costs.
Through all of these costs, it is easy for a client to determine his / her own total budget.