About 10 years ago, I took out a mortgage to give my sister her share of the family home. The idea at the time was that when my mother died, I would inherit the house in its entirity. The house was then registered as the JOINT property of myself and my mother. My question is this: in this situation, am I liable for inheritance tax when my mother dies? I understand that the inheritance tax thresholds have been reduced considerably in recent years, and this is causing difficulties for some people, so what is the position where a family home has been jointly owned by a parent and child?