Every serious company that does not live from one day to the next has long-term plans. Depending on the size of the company, these are often drawn up 5 or even 10 years in advance. Plans are the foundation on which every business should stand. Besides planning the regular business, it is extremely important to plan new projects. The project or investment is the basis for the progress of the business, keeping the existing business does not lead to the growth of the business and the revenue stagnates and usually declines over time. It is extremely important to plan investments properly as they can easily seriously damage the liquidity of a business. It should always be kept in mind that a project is not only an acquisition of fixed assets, but usually requires further followup costs before the first revenues are generated and the production cycle begins. When planning and managing a new project, the ongoing business should not be neglected. This paper meticulously analyses the business of a company engaged in agricultural and energy production. A detailed analysis of the entire business has been carried out and a conclusion has been drawn about the current state of the business, whether the business is ready for a new investment cycle or not. After drawing a conclusion about the status of the business, the potential investment in the construction of a barn for cattle fattening, including equipment, manipulative content and machinery, was analysed. After analysing new investments, the current business plan of the observed enterprise and the business plan of the new project were linked and a conclusion was drawn about the impact of linking the project and the previous business.