IHTM26128 | Step 4 - grossing up: initial procedure for grossing up
From HM Revenue & Customs · Inheritance Tax Manual
Before starting the grossing calculation, you should make a note of the figures and values you will need. These are
the lifetime cumulative total (IHTM31413)
the total value transferred (IHTM04028) at the title where grossing up is required
the value (as reduced under interaction (IHTM26101) provisions if appropriate) of the specific gifts (IHTM26011) at that title in three separate groups
the value of the exempt gifts
the value of the chargeable specific gifts which do not bear their own tax
the value of the chargeable specific gifts which bear their own tax
the proportion of the residue that is exempt
After you have this information you should decide which type (IHTM26131) of grossing calculation to use.