Taxes scale depends on what you aern, but 100.000/year you pay 45% taxes, you could find info on
www.aeat.es (taxes goverment agency) but I doubt if itīs in English. Any way you can deduct on lotīs of things (mortage, kids, pension...) Better to talk with a Tax specialist, many around here, you can get aorund 4000-6000 back every year.