Abstract
This research investigated the importance and priorities of the project overhead costs in Iraq via a questionnaire using the fuzzy analytic hierarchy process technique (FAHP). Using this technique is very important in the uncertain circumstances as in our country. The researcher reached to frame an equation through the results of the priorities of weights include the percentages of each of the main items of the project overhead costs. The researcher tested this equation by applying it to one of the completed projects and the results showed suitability for the application. The percentages of the (salaries, grants, and incentives) and (fieldwork requirements) in equation represent approximately two-thirds of project overhead costs. So the contractors should deal with the project overhead costs carefully during estimate the bid. 
Highlights
IntroductionThe costs of any construction project can be divided into three main parts, the direct costs, indirect costs (overhead costs) and the profit
The costs of any construction project can be divided into three main parts, the direct costs, indirect costs and the profit
After integration experts’ opinions by the geometric mean, the rest steps of fuzzy analytic hierarchy process technique (FAHP) algorithm applied to the integration results to finding the items weights as explained in the Tables 4 to 10
Summary
The costs of any construction project can be divided into three main parts, the direct costs, indirect costs (overhead costs) and the profit. Indirect cost or overhead costs of projects plays a large role and clear influence on the construction industry performance, Kumar, and Kumar, 2016. Direct cost can be defined as the costs directly assignable to a particular product or process. Indirect costs or overhead costs can be defined as the costs not directly assignable to a specified cost object, Kumar, and Kumar, 2016. Project overhead costs which are called job site are all a part of the expenses which are spent by the contractors in managing a project at the site, Assaf, et al, 1999
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