Nil rate band (NRB) and transferable nil rate band (TNRB) Each person's estate is charged to inheritance tax (IHT) up to a certain threshold at a rate of zero per cent, called the nil rate band (NRB), which is £325,000 for the tax year 2023–24. The government announced at Autumn Statement 2022 that it will be frozen at this level until 5 April 2028 . See: Autumn Statement 2022—Private Client analysis—Key Private Client announcements. Prior to 9 October 2007, if the value of the chargeable transfer on a person's death did not use up all of their available NRB (either because their estate was less than the NRB or was left to an exempt beneficiary) its tax-saving benefit would not be fully realised. For example, it is common for spouses to leave their entire estates to each other under their Will (and in the absence of a Will, a significant amount, if not all of the estate, passes to the surviving spouse under the intestacy