[ninja-popup id=1717 autoopen=true]The taxes any cargo pay at entry in Spain are DUTIES & VAT.
VAT usually is 21% of value CIF of the cargo. (There are some products have reduced VAT, like food, but general cargo pay 21%)
DUTIES depens on the HS CODE (type of cargo) and origin.
Bellow you can check the duties with the official TAXATION European Comunity website.
You only have to add the HS CODE and the Origin.