The work deals with the taxation of income of non-governmental non-profit
organizations. The theoretical part describes the general procedure for determining the tax liability of these organizations, including overlap in bookkeeping. The practical part of the work analyzes the determination of the tax liability of a specific non-profit organization. The output of the work is a point out to untapped opportunities leading to tax optimization and a proposal for analytical records that could make it easier for the entity to transform acoounting profit or loss on a tax base.