A tax on death and on lifetime transfers that was introduced in 1894 to replace probate duty. Estate duty was eventually replaced by capital transfer tax in 1974/1975 and, subsequently, by inheritance tax. It is still relevant for deaths before 13 March 1975 and so may need to be considered in relation to the transferable nil rate band. For further information see Practice note, Inheritance tax transferable nil rate band: overview: Transferring the nil rate band: the rules: Deaths before 18 March 1986: capital transfer tax and estate duty.