CTM21520 | ACT: FID: international headquarters companies (IHC): whether company is an IHC
From HM Revenue & Customs · Company Taxation Manual
ICTA88/S246S (9)
Where a company paid an FID, it could treat itself as an IHC if:
at the time the dividend was paid the company was of the opinion it was likely to be an IHC in the accounting period in which the dividend was paid, and
where the dividend was paid other than in the company’s first accounting period, it was an IHC in the immediately preceding accounting period (but see CTM21510, second condition).