<p>Cold-formed steel (CFS) is gaining popularity in several countries as a promising alternative to traditional steel due to its lightweight properties. However, there is still limited data on joint behavior, particularly regarding composite connections integrated with CFS. The effects of various parameters on the composite CFS beam-to-column connection are investigated in this paper using the Finite Element Method with the computer program ABAQUS. In the first part, a validation study was conducted to generate a model that agrees with the experimental data of a previous paper, including the effect of the connection shape between the CFS beam and column. A 3D finite element model was developed to replicate the observed experimental behaviour, and good agreement was found between numerically obtained results and the experimental observations, such as the moment-rotation curve and failure mode. Subsequently, various parametric studies were conducted, including top and seat angle thickness, reinforcing ratio, use of stiffeners in the column web, CFS column shape, and the number of connection bolts. It is concluded from the parametric study that the used angle with a thickness to width ratio equal 0.092 improves the moment capacity of a composite joint by 17.3%, and the use of stiffener in the column web improves the moment capacity by 42.65% and prevents the buckling of the column web while maintaining a semi-rigid behavior of the joint according to the European Code.</p> Graphical Abstract <p></p>