Tax on Rental for non resident owners. Favourite Spanish Property Insight › Forums › Spanish Property Forums › Property Questions & Answers › Tax on Rental for non resident owners. This topic contains 0 replies, has 1 voice, and was last updated by Anonymous 7 years ago. Author Posts December 3, 2011 at 10:07 pm #56633 AnonymousParticipant If your annual rental income is below the “assumed” amount calculated on your end of year tax form do you show this income amount on the forms. Author Posts The forum ‘Property Questions & Answers’ is closed to new topics and replies.