http://www.legislation.gov.uk/ukpga/2010/4/section/21/2012-01-15Corporation Tax Act 2010An Act to restate, with minor changes, certain enactments relating to corporation tax and certain enactments relating to company distributions; and for connected purposes.texttext/xmlenStatute Law Database2026-05-20Expert Participation2012-01-15
Corporation Tax Act 2010s. 658(1)(d)(e)Finance Act 2010Sch. 6 para. 31Sch. 6 para. 35Corporation Tax Act 2010s. 357CHAFinance Act 2024Sch. 2 para. 14(7)Sch. 2 para. 16(2)
Part 3Companies with small profits<Emphasis>Marginal relief</Emphasis>Company with ring fence profits and other profits211This section applies if—aa company is UK resident in an accounting period,bit is not a close investment-holding company in the period,cits augmented profits of the accounting period—iexceed the lower limit, butiido not exceed the upper limit, anddits augmented profits of that period consist of both ring fence profits and other profits.2The corporation tax charged on the company's taxable total profits of the accounting period is reduced by the total of—athe sum equal to the ring fence fraction of the ring fence amount, andbthe sum equal to the standard fraction of the remaining amount.3In this Part “ring fence profits” has the same meaning as in Part 8 (see section 276).