I recently had a thread on the website in connection with re mortgage.I intend to purchase an investment property .I may remortgage my main residence worth 500,000 on which there is no mortgage.I would be looking for 100,000 euro.When I let out my investment property I can write off interest repayments against my rental income for tax purposes even though it is a remortgage. My question is can I claim for expenditure incurred in improving and maintaining my investment property or does it have to be my main residence when it is a re mortgage.