uspaul666 wrote:All the financial institutions that my mother and father had joint accounts with provided a balance for the joint account upon seeing a death certificate. That provided all the information I needed to calculate a IHT liability.
Surely if your parents are married then there would not be an IHT issue upon the first death anyway, at least not arising out of the funds in the joint accounts.
But where IHT is an issue, then merely knowing the balance in the account at the point of death is insufficient. You could get that from a bank statement anyway. And the balance won't tell you the source of funds i.e. how much of that balance was contributed by the two parties.
I don't know how picky HMRC is about this "source of funds" requirement. Maybe in the vast majority of situations they just assume 50% each, or else accept whatever the Executor says. But at the margin the risk of them disputing a 50/50 split isn't zero, I would have thought.