On the RNRB point there is no chance of claiming that on P’s death if his house is left to his unmarried partner or her children, if they are not also his: s.8K IHTA.
Where he has children of his own who are on good terms with his “other family” he could leave the house to his own children for life, IPDI, with remainder to his partner’s family or any of them absolutely; but not for life. If his own children are content with then making a PET of the house, a power of appointment could be exercised to appoint the house to the remaindermen. This should not be done too soon as HMRC dislike short life interests used in this way to secure the spouse exemption.
The trustees should be obliged to use their best endeavours to enter into 7 year term assurance for the benefit of the life tenants to compensate them for the loss of their usage of their respective NRBs for that period and to charge the cost to the remaindermen.
As well as requiring the consent of the life tenants the feasibility is likely to depend on the life expectancy of P and his children. Insurance will be more expensive the older P’s children are when the insurance is written; there is no reason why it could not be written when the Will is made and the policy settled on the life tenants to prospectively compensate them. The greater length of the term will increase the cost of the premiums but the younger lives assured will reduce it. Estimating the sum assured could be tricky but not impossible and “half a loaf is better than none”.
It is arguably over-elaborate in order to save tax on £175k @ 40% = £ 70k. And the saving may be less of course if not all the amount has to be used. However, if P leaves other assets, e.g. his free estate, to others it will reduce the effect of aggregation: the RNRB like the NRB is given against the estate as a whole and then in effect apportioned to each title. In such a case RNRB will partly benefit the free estate so there is an incentive for those inheriting the free estate to agree to the alternative variation mentioned below to secure RNRB
The remaindermen must realise that, if there are other assets in the estate, by the same reasoning they will not enjoy the whole benefit of the RNRB. P can minimise the effect of that by an annticipatory adjustment in his Will.
That also raises the question of funding whatever tax is payable on his death. A specific gift of the house is free of tax which must be paid out of other assets or its sale proceeds if they are insufficient. If such a sale is inevitable, as would be almost certain if the gift were made subject to tax, the house could only be retained if the specific legatees financed the retention by themselves meeting the amount of tax that a sale would produce.
This result could be achieved after P’s death by a variation of his Will under s142 with reading back and including a legacy to P’s children of the policy premium; the remaindermen must not pay that out of their own pockets.
There is always a risk in these situations, even without any highfalutin pyrotechnics, that the value of the residence will disproportionately affect the net quantum of the rest of the estate if it is left to different beneficiaries.
Jack Harper