IHTM26102 | Step 3 - interaction: situations where interaction applies

From HM Revenue & Customs · Inheritance Tax Manual

Interaction under applies only to transfers on or after 18 March 1986

  • where the value transferred is reduced by business relief () or agricultural relief (), and

  • only for the purpose of valuing specific () and residuary gifts () under and .

You must not apply the rules in any other situation or for any other purpose.

Broadly the rules of are that

  • you value specific gifts of relievable property at their value after relief

  • you reduce other specific gifts by a proportion of the relief on any other relievable property, whether the gifts are chargeable or exempt, pecuniary or of assets (such as the residence or chattels)

  • if the gift has to be grossed up (), you must gross up the reduced value under

If the estate includes heritage property which has been given conditional exemption under , you should refer the case to Technical. You should send the case with a note showing your calculation of the tax. If final figures are not available, use estimates for illustration.