The aim of this work was to evaluate the impact of selected indicators in suckler cows breeds, their model quantification and comparison of optimal (recommended) parameters with achieved real natural-economic results in the monitored file of farms (n=5) in 2009. The average annual total costs in the monitored farms in 2009 were € 769 (2.1 €.FD-1) per a suckler cow and the average total costs for rearing of heifer till to calving at € 1,362 per heifer. At the model natality of 65 calves, we estimated the total revenues for calves1000 (calves with the average daily weight gain 1,000 g.pc -1) at about € 29,700 and for calves781 (calves with the average daily weight gain 781 g. pc -1) € 24,024 (€ -5,676). For maximum model natality of 95 calves have been estimated revenues for calves1000 at about € 49,500 and for calves781 € 40,039 (€ -9,461). When the actually achieved natality in monitored farms is at average 78.98% (80%), we can estimate the average revenues for 60 realized calves1000 at € 39,600 and by the calves781 at € 32,031 (€ -7,569). Economic loss due to shortening the length of calves rearing for a month represents a decrease of potential revenues per a calf on average € 72 respectively € 56 (€ -16) per month reducing the length of calves rearing. For really achieved average daily weight gain of calves 781 g.pc-1, we can estimate the potential revenues per a weaned calf at € 534 respectively for average daily weight gain 1,300 g.pc-1, revenues approximately € 833 (€ -299). In terms of length of cow productive age, we estimated that if we reject cow after the third lactation, depreciation will be at € 246 per year (0.67 €.FD-1) respectively after eleven lactation at € 67 (0.18 €.FD-1) per year.
