{
  "url": "https://openlegislation.uk/capital-allowances-act-2001/section-310",
  "json_url": "https://openlegislation.uk/capital-allowances-act-2001/section-310.json",
  "legislation": "ukpga/2001/2",
  "legislation_title": "Capital Allowances Act 2001",
  "legislation_url": "https://openlegislation.uk/capital-allowances-act-2001",
  "path": "section/310",
  "kind": "section",
  "number": "310",
  "heading": "Basic rule for calculating amount of allowance",
  "text": "(1) The basic rule is that the writing-down allowance for a chargeable period is—\n(a) in the case of qualifying enterprise zone expenditure, 25% of the expenditure, and\n(b) in the case of other qualifying expenditure, 4% of the expenditure.\n(2) The allowance is proportionately increased or reduced if the chargeable period is more or less than a year.\n(3) This basic rule does not apply if section 311 applies.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Pt. 3 omitted (with effect in relation to chargeable periods beginning on or after 1.4.2011 for corporation tax purposes and 6.4.2011 for income tax purposes in accordance with ss. 84(1)(3)(4), 85, 86 of the amending Act) by virtue of Finance Act 2008 (c. 9), s. 84(2) (with Sch. 27)"
    },
    {
      "type": "C",
      "label": "C1",
      "text": "Pt. 3 modified (22.7.2008) by Crossrail Act 2008 (c. 18), Sch. 13 para. 21(1)"
    },
    {
      "type": "C",
      "label": "C2",
      "text": "Pt. 3 modified (22.7.2008) by Crossrail Act 2008 (c. 18), Sch. 13 para. 38(1)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/2001/2/section/310",
    "retrieved_at": "2026-10-29T09:20:17.739129+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."
}