The article deals with the subject of the real property taxation system currently in force in Poland and in Latvia. The current basic real property taxation rate in Poland applies per 1m² of the estate's total area and additionally depends on the manner in which the property is used. Real property tax income becomes part of the budget of the commune in which the property is located. The forest tax and the agricultural tax are established separately. For many years there have been plans for changing the tax system used in Poland to the cadastral tax, which uses the cadastral value, resembling the market value of the real property, as the basis for real property taxation. Cadastral assessment in Latvia is mainly used for calculating the real property tax. To calculate the cadastral value of a particular object, five assessment models have been developed. They are: assessment model for building land, assessment model for rural land, assessment model for buildings, assessment model for apartments and assessment model for engineering technical objects. Real property tax and the amount of objects are determined by the law in Latvia.