We bought in Dublin at the end of 2005 and like many have rented this property out while we rent a property in the country. We are receiving rent of €1400 while our mortgage repayments are just under €1000. Therefore as we are making a profit on the property we are being stung for Income tax each year even with all the deductions. Our tax liability for 2014 is €3000. My question is, if we were to increase our monthly mortgage repayments would this decrease the tax we would owe or would it make any difference from a tax point of view? Thanks for advising