Construction delays are often under the discussion of researchers and scientists for qualitative as well as quantitative analyses. Deeper analyses have made the distinction in causes of various delays more comprehensive now. For project managers to save their projects from critical delays and cost escalations, it is primarily important to understand the categories of delays with respect to the source and cause. This article aims to elaborate on the eight categories of construction delay causes. Eight categories of causes of construction delays Construction delays are a common occurrence in construction projects. Delay in one activity leads to the late beginning of multiple other activities that are dependent on it. In this way, the chain of delays continues if not mitigated carefully. The common causes of delays can be categorized as follows in traditional contracts: 1. Client related factors Clients in construction projects are often very picky and thus cause