If a company wants to continue doing business and develop, it must invest in new projects. Investments are very important not only for a business entity itself, but for society in general. Every new investment begins with investment project planning. The panning sets standards of what the entrepreneur wants to achieve in the future and also sets the strategy for achievement of goals and that is why it is the best start to consider a potential investment project. The first step in investment project planing is to identify the benefits of investment considering current performance. The second step is analysis of future operations based on projected financial flows and identification of sources of financing. This planning results with an investment study, which is detailed report that places idea in space and time and gives it a measurable value. Business planning is essential for successful implementation of investment because it gives an outline of the business, future results and alternative solutions to possible problems in the future. On the basis of investment study entrepreneur decides whether to proceed with implementation of investment or to give up the idea. The aim of this paper is to describe the process of planning an investment using a concrete example. The investment project this paper observes refers to investment in building that will enable the company to expand the current business and start the new business activity.