IHTM14531 | Lifetime transfers: the charge to tax: immediately chargeable transfers: introduction
From HM Revenue & Customs · Inheritance Tax Manual
As the name suggests, the tax charge on an immediately chargeable transfer () arises at the time it is made. It does not depend on a death.
The due date for payment () depends on the date of transfer.
The amount of tax payable depends upon
the value for tax ()
cumulation (),
the rate of tax ().