There is no set statutory time by which time HMRC must conclude a tax enquiry. However, the legislation gives taxpayers the right to apply to the tribunal for a direction requiring HMRC to issue a closure notice within a specified period. The tribunal is obliged to give the direction unless it is satisfied that there are reasonable grounds for not issuing the closure notice.
In Hitchins, HMRC had been trying to work out whether three brothers should be subject to tax under the "transfer of assets abroad" (TOAA) rules. The main focus of their enquiries was a £40 million dividend that had been paid by a company which had been established by their father but which, by the time the dividend was paid in 2003, was ultimately owned by The Hitchins Family Settlement, a Guernsey resident discretionary trust.
The enquiries had been going on for a long time, eight years in relation to one of the brothers, but HMRC said that it needed further information to work out whether, and if so how, a charge arose under the relevant legislation.