The first preliminary results of the author’s research on »Tendencies until now ol change in the structure of per capita consumption and its influence on the structure of production and anticipated development until 1985« which was done under the auspices of a scientific-research project on »An Inquiry into the Stan dard of Living of the Population«, by the Institute of Economics of Zagreb University in 1970, are discussed in this article. The long-term development of per capita consumption of individual socio- -economic categories of households in Croatia was made on the basis of regression analysis of preliminary results of a questionnaire on personal expenditure of the population in 1968. For a long-term prognosis of the personal consumption of individual socio- -economic categories of households the lower and higher variants of a unit of growth of personal consumption was taken. For this, the author took into consideration that long-term development up to 1985 will mediate the differences in personal consumption between individual socio-economic categories of the population. Due to anticipated differences in the unit of growth of total personal consumption in individual socio-economic categories of households, the growth of individual groups of individual consumption will be varied and is at the same time expressed differently in the structure of change in per capita consumption over a long-term period. In all socio-economic categories of households, the total personal consumption is approaching a relative decrease in the share for subsistence and a relative increase in the share of durable goods and services. Of course, the intensity of these changes varies so that in 1985 there will be even more significant differences in the structure of per capita consumption among individual socio-economic categories of households. An even higher level of economic development, that is, of the standard of living, is necessaiy in order to diminish the differences even more. A decrease in the differences in the standard of living among individual socio-economic categories of the population contributes generally to stabilization in the economic and demographic structure, that is, to an increase in economic growth and in the standard of living. Prognoses of spending for food per capita and of the provision of durable goods and automobiles also point to a growth m personal consumption and a decrease in the differences in personal consumption ’ of individual socio-economic categories of households in the long-term period until 1985. These long-term prognoses of personal consumption, although they are of a very rough character, can usefully serve as an orientation to the development of production, for social direction of consumption and for the planning of the national economy as a whole. For this reason it is important that this research be continued.