The critical difference lies in mobility; personal property can be moved, while real property is fixed and immovable. Business Personal Property Tax is a tax assessed on tangible personal property businesses own.Spending too much time completing business personal property renditions? Increase your efficiency with this detailed walk-through. All businesses are required to file annually a Declaration of Personal Property that lists the assets' original cost. Personal property typically consists of inventory and fixtures used in conducting business, boats, aircraft, farm machinery, motor vehicles and mobile homes. If you feel your home is improperly assessed, you are encouraged to file an appeal with the Cook County Assessor's Office. In brief, they are these: 1. Certain types of real property are listed in the Real Property Tax. Law. 2. Tangible Personal Property includes any equipment, furniture, fixtures, tools, signs, machinery or supplies used in a business or for a commercial purpose.