Catch 22 Value the property highly and you up the IHT. Value at a lower level and you ultimately up any CGT However IHT is a lot higher than CGT but there is an initial tax free allowance for IHT whereas there is an annual allowance for CGT. So good luck trying to work out which is best. All you have to do now is factor in how long you might keep the house and what it's likely value will be in "n" years time - and how long both of you might live, assuming you are still together in a legal sense at that point in time. Simples as they say.