maths wrote: No, I haven't misunderstood the facts.
...The 7 year rule may not be relevant (i indicate above when this is the case).
Assuming the 7 year rule is in point..
As maths indicates, the facts do seem clear here but khalid's last post may just reflect his/her understanding of both taxation law as well of the words (some may call it jargon) that professionals use who work in that area. That understanding may not be where maths supposes.
I would guess that khalid may not be aware of the difference between joint tenancy and tenants in common when owning a house. A layman might quite reasonably be confused by the use of the word “tenant” in the context of ownership.
If my guess is right then Khalid should read up about the difference so as to learn that first of all the two spouses should become be tenants in common to be able to each gift a portion of his and her interests to their daughter. The numbers are usually (but need not be) to become 50%/50% tenants in common before gift and each spouse gifting 1/3 of his/her 50% interest to end up with spouse1/spouse2/ daughter each owning 1/3.
As maths says the gift of 1/3 of 50% each is a potentially exempt transfer PET (because made to a person, the daughter but it is a gift with a reservation of benefit GROB (because each spouse continues to live in the house) though the GROB condition does not apply if daughter continues to live in house and pays her share of costs in proportion to her ownership (which may not necessarily be 1/3).
As khalid should use a solicitor to prepare the necessary paperwork and I’m falling asleep, then hopefully khalid now has sufficient understanding for a layman to approach such a solicitor about this approach to mitigating IHT on parents’ deaths. Such mitigation is only achieved if both spouses were to die and their combined estates (including the house) are valued at more than £650,000 (twice the nil rate bands at time the surviving spouse dies). If say on their deaths the house is worth £360,000 (as it was say at time of gift) and their two total estates are worth £750,000 then the mitigation benefit of the daughter having been gifted earlier a 1/3 interest, assuming both parents lived for more than 7 years after date of gift and GROB not applicable, is to reduce the estates by £120,000 (1/3 of value of house at time of deaths) assessable to IHT from £750k to £630k which saves £100k (equal 750-650)*40% = £40k of IHT.