Company “C” operates in many different fields of industries. One of its subsidiaries produces phar- maceuticals and employs over 900 people in six different places in Finland. The whole company employs over 5000 people in Finland. In this case study, the accounting manager of the company was interviewed. The need for the new cost accounting system arose when the company merged with an- other Finnish pharmaceutical company in 1990. After the merger the company has plants in six different places and two different kinds of product control systems. The basis for the design of the new system was to aggregate the product control sys- tems and to unify the business. Also, the purpose of the new system was to develop an appropriate cost system for the transfer pricing. It is important to determine the exact product costs and to allocate the costs to right products. It was found from the analysis of the present cost accounting s