I am converting my PPR to an investment property. I believe mortagae interest is allowed in calculating my nett income from this property. Does anyone know how much interest is allowed i.e. say I originally purchased the property for 120k (with a mortgage of 100k), I have since paid off 30k of this so my existing mortgage on this proprty is 70k. I will however, re-mortgage this property to an amount of 200k. Can I get relief from the interest i will pay on the 200k or do revenue cap the mortgage interest allowed at some other figure? (e.g. the original purchase price of the house).......Many thanks,