Case study A was married to B. After B’s death, A got remarried to C. On A’s death, the executors wish to preserve A’s NRB for the executors of C’s estate to claim on C’s death. Transferable nil rate band (TNRB) Each person’s estate is exempt from inheritance tax (IHT) up to a certain threshold, known as the nil-rate band (NRB). The NRB is £325,000 for the tax year 2016/17, and it will be frozen at this level until 5 April 2021. If a person (A) dies after 9 October 2007, it is possible for the unused percentage of the NRB from A’s late spouse or civil partner (B) to be transferred to A’s estate. This called the transferable nil rate band (TNRB). The TNRB can increase the NRB available to the surviving spouse’s estate by up to 100%. Additionally, if a lifetime