The land-rating value of agricultural land is one of the most important records/inventories of agricultural land quality, on which spatial planning and agricultural land protection decisions are based, as well as land assignment in land consolidation processes. Land valuation was established state-wide in Slovenia in 2008 by a conversion of cadastral classification data into land-rating values. However, some questions regarding the reliability of the data arise, as can be seen by the requests for the change of land-rating value based on the field examination results. This article presents experiences and findings of comparison between official information from public data bases and land-rating value based on calculations with precise data on soil characteristics, obtained from analyses of 44 soil profiles, located within different pedosystematic units. On average, the difference between land-rating value based on precise calculations and official information was 5 points. Bigger differences were determined on agricultural land with lower production potential, on agricultural land with higher production potential differences were lesser.