The aim of this paper is to explain the forms and types of investments in economic terms. The paper defines the terms related to investments, capital budgeting, investment calculations, investment elements, repayment of the investment loan and also explains the examples of loan repayment. In this paper, investments are analyzed as a key element in the success of any enterprise that wants to thrive and reach specific targeted enterprise plans. The Agency for Supervision of Financial Services HANFA and the Reconstruction and Development Bank HBOR, without which financial services, operations and the national economy can not function, have also been described. Croatia is a country that attracts many investors from all over the world.