Abstract: Research is devoted to questions of increase in activity efficiency of the enterprises by use optimization of the available resources. Market conditions staticize problems of increase in efficiency of financial resources use of the enterprises, increases in efficiency of realization of production function limited financial resources of the enterprises of the construction sphere. Special attention is paid to identification and influence assessment of various financial resources on amount of completed work by the form of activity “construction”. On the basis of creating the economical and statistical model characterizing influence of separate factors on amount of works by the form of activity “construction” the prevailing extent of influence of accounts payable as a part of financial resources is defined on a productive indicator of amount of works by the form of activity “construction” in the Saratov region.