IHTM14541 - Lifetime transfers: the charge to tax: grossing: when to gross-up
Grossing applies when the tax on the chargeable transfer is borne by the transferor. (IHTM14593)
You should gross up the value transferred if
- the account or correspondence states that the transferor is to bear the tax
- at the time of the transfer the transferor enters into a binding agreement to pay the tax
- after the transfer, the transferor pays tax (even an instalment) direct to HMRC, or
- the tax is paid from the transferor’s death estate (IHTM14593).
All these situations are caught by IHTA84/S227(1)(b). You should not allow instalments in cases where arrangements of this kind are revealed.