The law is contained in s66 IHTA 1984. The wording is formidable and sadly pre-dates the use of examples, ideal here.
IHTM42081-91 are intended to assist but again more examples would be useful.
The idea is to tax the value of the property in an RPT at each 10 year interval. The maximum rate is 6% but the law allows some degree of reduction by reference to the nil rate band of tax. It presumes that a person with certain characteristics has transferred the settled property.
The principal feature is the actual cumulation of the real settlor in the 7 years prior to making the settlement. The “aggregate” part comes in at 10 year anniversaries after the first. You add to that cumulation any amounts charged on distributions by the trustee during the previous 10 years. The idea is to prevent assets being distributed between 10 year anniversaries (charged at perhaps a low or nil rate because tied to the rate applicable on the most recent 10 year anniversary) and so reduce the tax charged on the next anniversary (disproportionately, or so the those who dreamt all this up apparently thought).
So take an RPT fund worth £300,000 at the first 10 year anniversary. In isolation this would be below the NRB. If the actual settlor had made no chargeable transfers in the 7 years before the RPT was settled, then a full NRB will apply to the settled property. But if he had made transfers of £100,000 the NRB of the trust would be reduced to £225,000 and £75,000 would be taxed at 6% = £45000. A tax rate of 1.5% (4500/300000 x100)
At the second 10 Year anniversary the value of the RPT assets is now £400,000. You repeat the process. But suppose the increase in value was partly masked by a distribution of £60,000 during the prior 10 years. That will have been taxed at the time at 1.5% with a reduction for incomplete quarters. But the settlor is now treated at the next 10 year anniversary as having had an actual cumulation (of nil or £100,000 as the case may be) plus the £60,000 distributed. That is the aggregate notional transfer and the rate of tax on the £400,000 is bigger than if no interim distribution had been made.
If the settlor’s actual cumulation was nil it would be treated as £60,000 so the available NRB would be only £265,000 leaving £135,000 taxed at 6%.
If a settlor with a nil cumulation settled assets that were worth £325,000 10 years later, the charge then would be nil and any value distributed in the next 10 years would also be taxed at nil. But what if the remaining value of the settled property at the next 10 year anniversary was still £325,000 due to investment growth. £750,000 of value would have escaped tax. Counting the value of the interim distributions into the notional aggregate cumulation reduces that advantage.
Regrettably the draftsman, who was presumably a sado-masochist, has factored in all kinds of other adjustments involving related settlements, same day additions and assets not in the RPT regime for all of the 10 years. Given the low rate of tax (while stocks last!) one asks whether such complexity is appropriate. But then one recalls the paranoia that underpins the CGT annual exemption for multiple trusts created by the same settlor in Sch 1C TCGA and concludes that the pathology is hereditary.
Jack Harper