As of April 2009, the amount you can leave before paying IHT (also known as the “Nil Rate Band”) was capped at £325,000. If you are married or joined in a civil partnership you may be able to use your partner’s Nil Rate Band, meaning you could therefore leave a total of £650,000 before IHT is payable. Anything above this amount is taxable at 40%. In April 2017 an additional Residence Nil Rate Band was introduced. The current value of the residence Nil Rate Band for qualifying estates is £135,000 therefore a married couple or civil partnership could leave a total of £900,000 before IHT is payable.