{
  "url": "https://openlegislation.uk/corporation-tax-act-2010/section-279B",
  "json_url": "https://openlegislation.uk/corporation-tax-act-2010/section-279B.json",
  "legislation": "ukpga/2010/4",
  "legislation_title": "Corporation Tax Act 2010",
  "legislation_url": "https://openlegislation.uk/corporation-tax-act-2010",
  "path": "section/279B",
  "kind": "section",
  "number": "279B",
  "heading": "Company with only ring fence profits",
  "text": "(1) This section applies if—\n(a) a company is UK resident in an accounting period,\n(ab) it is not a close investment-holding company in the period,\n(b) its augmented profits of the accounting period—\n(i) exceed the lower limit, but\n(ii) do not exceed the upper limit, and\n(c) its augmented profits of that period consist exclusively of ring fence profits.\n(2) The corporation tax charged on the company's taxable total profits of the accounting period is reduced by an amount equal to—\nR × ( U − A ) × ( N A )where—\nR is the ring fence marginal relief fraction,\nU is the upper limit,\nA is the amount of the augmented profits, and\nN is the amount of the taxable total profits.\n(3) In this Chapter “the ring fence marginal relief fraction” means 11/400ths.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Pt. 8 Ch. 3A inserted (with effect in accordance with Sch. 1 para. 22 of the amending Act) by Finance Act 2014 (c. 26), Sch. 1 para. 5(3)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "S. 279B(1)(ab) inserted (with effect in accordance with Sch. 1 para. 34 of the amending Act) by Finance Act 2021 (c. 26), Sch. 1 para. 6(a)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Words in s. 279B(2) substituted (with effect in accordance with Sch. 1 para. 34 of the amending Act) by Finance Act 2021 (c. 26), Sch. 1 para. 6(b)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Words in s. 279B(3) substituted (with effect in accordance with Sch. 1 para. 34 of the amending Act) by Finance Act 2021 (c. 26), Sch. 1 para. 6(c)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/2010/4/section/279B",
    "retrieved_at": "2026-10-29T09:10:29.433154+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}