This thesis describes the development of a calculation model for estimating costs of actuators in the company SKF Motions Technologies. The aim with the calculation model is to show costs that are not apparent today, e.g. Costs that occur when establishing a new supplier or creating new manuals.  SKF has a standard assortment, including and many variants of these due to special orders. The calculation model being used today does not include the total costs, which results in uncertainties in whether the price is correct or not.   The method used in this thesis includes a theoretical study, to attain understanding of cost calculation and different methods to use.  The theoretical study also included studying other projects with comparable developments. The thesis continued with a research that started with a qualitative approach where semistructured interviews were performed to map the current situation. The information from these interviews were compiled in flow charts to achieve understanding of the processes involved, and to see what generates costs in those processes. Furthermore, it continued with a quantitative research when analyzing orders, customer requirements and costs. Meetings with the company´s finance system expert aimed at understanding the current model, and the factors included. The current model has also been the basis for verifying the new calculation model. After the data collection and the current state analysis, it was clear that the company's costs are scattered and that there is more cost than manufacturing and material, which can be attributed to activities. Such costs are difficult to show in a traditional calculation, and can easily be unnoticed. The thesis resulted in a new calculation model. The model was created to handle more variables than its predecessor, to achieve an insight in how different variables affect the pricing