{
  "url": "https://openlegislation.uk/social-security-contributions-and-benefits-act-1992/section-15",
  "json_url": "https://openlegislation.uk/social-security-contributions-and-benefits-act-1992/section-15.json",
  "legislation": "ukpga/1992/4",
  "legislation_title": "Social Security Contributions and Benefits Act 1992",
  "legislation_url": "https://openlegislation.uk/social-security-contributions-and-benefits-act-1992",
  "path": "section/15",
  "kind": "section",
  "number": "15",
  "heading": "Class 4 contributions recoverable under the Income Tax Acts.",
  "text": "(1) Class 4 contributions shall be payable for any tax year in respect of all profits which—\n(a) are immediately derived from the carrying on or exercise of one or more trades, professions or vocations, ...\n(b) are profits chargeable to income tax under Chapter 2 of Part 2 of the Income Tax (Trading and Other Income) Act 2005 for the year of assessment corresponding to that tax year and\n(c) are not profits of a trade, profession or vocation carried on wholly outside the United Kingdom.\n(2) Class 4 contributions in respect of profits ... shall be payable—\n(a) in the same manner as any income tax which is, or would be, chargeable in respect of those profits ... (whether or not income tax in fact falls to be paid), and\n(b) by the person on whom the income tax is (or would be) charged,\nin accordance with assessments made from time to time under the Income Tax Acts.\n(3) The amount of a Class 4 contribution under this section for any tax year is equal to the aggregate of—\n(a) the main Class 4 percentage of so much of the profits ... referred to in subsection (1) above (computed in accordance with Schedule 2 to this Act) as exceeds £12,570 but does not exceed £50,270; and\n(b) the additional Class 4 percentage of so much of those profits ... as exceeds £50,270;\nbut the figures specified in this subsection are subject to alteration under section 141 of the Administration Act.\n(3ZA) For the purposes of this Act—\n(a) the main Class 4 percentage is 6%; and\n(b) the additional Class 4 percentage is 2 per cent;\nbut the main Class 4 percentage is subject to alteration under section 143 of the Administration Act.\n(3A) Where income tax is (or would be) charged on a member of a limited liability partnership in respect of profits ... arising from the carrying on of a trade or profession by the limited liability partnership, Class 4 contributions shall be payable by him if they would be payable were the trade or profession carried on in partnership by the members.\n(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\n(5) For the purposes of this section the year of assessment which corresponds to a tax year is the year of assessment (within the meaning of the Tax Acts) which consists of the same period as that tax year.",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Word in s. 15(1) substituted (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(2)(a) (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Word in s. 15(1) repealed (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(2)(b), Sch. 3 (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Words in s. 15(1)(b) substituted (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(2)(c) (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "S. 15(1)(c) and preceding word inserted (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(2)(d) (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Words in s. 15(2) repealed (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(3), Sch. 3 (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F6",
      "text": "S. 15(3)(3ZA) substituted for s. 15(3) (with effect in relation to the tax year 2003-04 and subsequent tax years) by National Insurance Contributions Act 2002 (c. 19), ss. 3(1), 8(2)"
    },
    {
      "type": "F",
      "label": "F7",
      "text": "Words in s. 15(3) repealed (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(3), Sch. 3 (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F8",
      "text": "Sum in s. 15(3)(a) substituted (6.4.2023) by National Insurance Contributions (Increase of Thresholds) Act 2022 (c. 16), s. 2(3)(4)"
    },
    {
      "type": "F",
      "label": "F9",
      "text": "Sum in s. 15(3) substituted (6.4.2021) by The Social Security (Contributions) (Rates, Limits and Thresholds Amendments and National Insurance Funds Payments) Regulations 2021 (S.I. 2021/157), regs. 1, 5(2)"
    },
    {
      "type": "F",
      "label": "F10",
      "text": "Figure in s. 15(3ZA)(a) substituted (6.4.2024) by National Insurance Contributions (Reduction in Rates) Act 2024 (c. 5), ss. 1(3)(a), 3(1)"
    },
    {
      "type": "F",
      "label": "F11",
      "text": "Figure in s. 15(3ZA)(b) substituted (6.4.2011) by National Insurance Contributions Act 2011 (c. 3), ss. 2(1)(b), 13(1)"
    },
    {
      "type": "F",
      "label": "F12",
      "text": "S. 15(3A) inserted (6.4.2001) by Limited Liability Partnerships Act 2000 (c. 12), ss. 13, 19(1); S.I. 2000/3316, art. 2"
    },
    {
      "type": "F",
      "label": "F13",
      "text": "Words in s. 15(3A) repealed (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(3), Sch. 3 (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F14",
      "text": "S. 15(4) repealed (6.4.2005 with effect in accordance with s. 883(1) of the amending Act) by Income Tax (Trading and Other Income) Act 2005 (c. 5), s. 883(1), Sch. 1 para. 420(4), Sch. 3 (with Sch. 2)"
    },
    {
      "type": "C",
      "label": "C1",
      "text": "S. 15(3): power to amend conferred (1.7.1992) by Social Security Administration Act 1992 (c. 5), ss. 141(4), 192(4)"
    },
    {
      "type": "C",
      "label": "C2",
      "text": "S. 15(3ZA)(a): power to amend conferred (1.7.1992) by Social Security Administration Act 1992 (c. 5), ss. 143(1)(4), 192(4)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/1992/4/section/15",
    "retrieved_at": "2026-10-29T09:36:29.915383+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."
}