With the Residence Nil Rate Band (RNRB), families can pass on up to £1 million without IHT

The RNRB is an additional £175,000 Inheritance Tax (IHT) allowance that applies when a person’s main residence is passed to a direct descendant, such as a child or grandchild, after their death. The allowance is available to married couples and civil partners, and it can significantly reduce the IHT liability on family homes.

The RNRB is separate from and in addition to the standard IHT nil-rate band of £325,000. When combined with the standard threshold, a married couple or civil partners can potentially pass on up to £1 million tax-free to their direct descendants. This figure is based on two individuals each having a £325,000 nil-rate band and a £175,000 RNRB.

Importantly, any unused portion of the RNRB from the first spouse or civil partner to die can be transferred to the surviving partner, provided a claim is made to HMRC when the second partner dies. This transfer is not automatic and must be claimed. This is usually done by the executor of the estate during administration.

The RNRB is subject to tapering for larger estates. For estates valued over £2 million, the RNRB is reduced by £1 for every £2 over the threshold. As a result, estates significantly exceeding £2 million may lose the RNRB entirely, even if the home is passed to direct descendants.