In this study an analytical model is created that estimates the capacity of a stabling yard with the implementation of 100% servicing. 100% servicing is a new concept developed by NS to increase the quality of trains by increasing the frequency of cleaning and maintenance of trains and improving planning of shunting movements at stabling yards by standardizing the service needs for al trains. It could potentially lead to more stabling capacity, of which a shortage exists in the Netherlands. The model is used in a case study for two stabling yards in the Netherlands: Zwolle and Eindhoven. The effect 100% servicing has on the stabling capacity appears strongly dependend on the layout characteristics of a specific stabling yard.