EN
Running a business is not possible without suitable resources of financing. Determination of rational financial structure is a necessary condition for efficient operation of a company. Financial resources as well as their configuration may lead either to development or to bankruptcy of a company. Thus, the decision about financial structure is a matter of fundamental importance to subsequent operation of organization. Moreover, this decision is made by the management during continuous company's activity. Unfortunately, both the description of the very process of reaching the decision and its validation seem to be really hard to formalize and to operationalize. Despite the fact that there have been carried out analyses, the issue of managing the financial structure remains to be resolved. Above all, the difficulties reside in the process of devising a suitable and universal model which would be widely accepted, particularly in the context of Polish capital market. This paper brings up modern models for constructing the capital structure as well as models for analyzing the efficiency of managing such a structure. Polish capital market issue, given in question is also illustrated in the context of administering financial structure in the Polish companies (including the ones which went out of business on stock.