Last edited: 11 Sep 2018 My Uk resident father in law died Feb and his estate is divided equally between my husband (an Irish resident) and his brother in Australia. The UK house was sold, probate was completed last month and the brother-in-law received his share then. My husband however decided to vary his share of the will to include 3 other relations and a charity and that variation is currently being processed by HM Revenue (as is routine). I assume he will receive his share in the next one to three months but could even be next year. As this is a second family inheritance for him, sizeable inheritance tax will be due here. Sterling has fluctuated and sunk during the year, and could easily change again, so the date that the tax will be deemed to be due from is significant. Is it when FIL died, when the final sum was known after the house sale, when probate was completed before the will variation, or when Revenue signs off the variation and we actually receive the money? Our normally astute accountant doesn't know the answer to this and can only refer us to an expensive tax consultant. We have no faith that revenue will give us a reliable answer either. Hoping for some insight here, thanks.