The time, quality, and cost are three important greatly affect the success and failure of a project. A project was implemented by the pre-planned cost and duration, but implementation often not in accordance with what has been planned. The purpose of this research is to calculate the cost change way to add working hours (overtime) and add labor so that the results of both will be compared. Data analysis is used Duration Cost Trade Off Method with the help of Microsoft Project 2013 Application. From the research conducted, for the addition of overtime 1 hour decreased by Rp 216,766,289.01 and change the duration decreased 122.43 days. For 2 hours overtime decreased by Rp 357,484,452.58 and change in duration decreased 94.05 days. For the addition of overtime 3 hours decreased by Rp 457,231,827.72 and change of duration decreased 73.19 days. While for the addition of labor for 1 hour decreased by Rp 227,406,477.40 and change the duration decreased 122.43 days. For the addition of labor for 2 hours decreased by Rp 390,751,942.47 and change of duration decreased 94,05 days. For the addition of workforce for 3 hours decreased by Rp 510,760,033.11 and change of duration decreased 73.19 days. From the analysis performed the most optimal results occur when the addition of workforce for 3 hours is Rp 510,760,033.11 and the duration of acceleration to 73.19 days.