This Practice Note explains how to calculate a controlled foreign company (CFC) tax charge. Once it has been established, in relation to a particular accounting period, that a company: • is a CFC • has chargeable profits, and • cannot apply one of the exemptions (ie the exempt period, excluded territories, low profits, low profit margin, and tax exemptions) it is necessary to apportion: • the chargeable profits, as further explained below, and • the creditable tax, as further explained below among those persons who had a relevant interest in the CFC at any time in that accounting period (the relevant persons). No reliefs may be set off against the CFC tax charge. This note explains: • what the chargeable profits of the CFC are • the steps that need to be taken in order to: ◦ identify the relevant persons ◦ determine the creditable tax of the CFC ◦ make an apportionment of the chargeable profits and creditable tax and ◦ identify the chargeable companies ◦ calculate the CFC tax charge, and