This paper presents estimates of the aggregate net (wealth) capital stock and aggregate capital services for Switzerland. We derive these estimates in a consistent manner using the perpetual inventory method. Due to changes in data availability, the time series cover the period 1970-2005 for a 2-asset breakdown (equipment and structures) and 1990-2005 for a 12-asset breakdown (nine categories of equipment and three of structures). The sensitivity of the results is examined by varying assumptions on the initial capital stocks, the length of asset lives, the method for calculating service prices, and the choice of ICT deflators. Differences to the estimates published recently by the Federal Statistical Office are summarised in the appendix.