Modifications etc. (not altering text)

C1Pts. 1, 6 modified (6.4.2001) by S.I. 2001/1004, regs. 1(1), 113, 114(2) (with reg. 138)

Part IU.K. Contributions

Modifications etc. (not altering text)

C3Pt. 1 modified (6.4.2001) by The Social Security (Contributions) Regulations 2001 (S.I. 2001/1004), regs. 1(1), 125 (as amended (6.4.2017) by S.I. 2017/416, regs. 1(2), 2; (6.4.2019) by S.I. 2019/555, regs. 1(2), 2)

C5Pt. 1 modified (for the tax year 2022-23) by Health and Social Care Levy Act 2021 (c. 28), s. 5(2) (with s. 7(2)) (which Act was repealed (25.10.2022) by Health and Social Care Levy (Repeal) Act 2022 (c. 43), s. 1 (with savings and transitional modifications of Pt. 1 in s. 2, Sch. paras. 1-3, 5))

C6Pt. 1 modified (in relation to the tax year 2023-24) by National Insurance Contributions (Reduction in Rates) Act 2023 (c. 57), Sch. para. 1(1)-(3)

Class 4 contributionsU.K.

15 Class 4 contributions recoverable under the Income Tax Acts.E+W+S

(1)Class 4 contributions shall be payable for any tax year in respect of all [F1profits] which—

(a)are immediately derived from the carrying on or exercise of one or more trades, professions or vocations, F2...

(b)[F3are 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 [F4and

(c)are not profits of a trade, profession or vocation carried on wholly outside the United Kingdom.]

(2)Class 4 contributions in respect of profits F5... shall be payable—

(a)in the same manner as any income tax which is, or would be, chargeable in respect of those profits F5... (whether or not income tax in fact falls to be paid), and

(b)by the person on whom the income tax is (or would be) charged,

in accordance with assessments made from time to time under the Income Tax Acts.

[F6(3)The amount of a Class 4 contribution under this section for any tax year is equal to the aggregate of—

(a)the main Class 4 percentage of so much of the profits F7... referred to in subsection (1) above (computed in accordance with Schedule 2 to this Act) as exceeds [F8£12,570] but does not exceed [F9£50,270]; and

(b)the additional Class 4 percentage of so much of those profits F7... as exceeds [F9£50,270];

but the figures specified in this subsection are subject to alteration under section 141 of the Administration Act.

(3ZA)For the purposes of this Act—

(a)the main Class 4 percentage is [F106%]; and

(b)the additional Class 4 percentage is [F112] per cent;

but the main Class 4 percentage is subject to alteration under section 143 of the Administration Act.]

[F12(3A)Where income tax is (or would be) charged on a member of a limited liability partnership in respect of profits F13... 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.]

F14(4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(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.

Textual Amendments

F1Word 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)

F2Word 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)

F3Words 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)

F4S. 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)

F5Words 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)

F6S. 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)

F7Words 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)

F11Figure in s. 15(3ZA)(b) substituted (6.4.2011) by National Insurance Contributions Act 2011 (c. 3), ss. 2(1)(b), 13(1)

F13Words 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)

F14S. 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)

Modifications etc. (not altering text)

C7S. 15(3): power to amend conferred (1.7.1992) by Social Security Administration Act 1992 (c. 5), ss. 141(4), 192(4)

C8S. 15(3ZA)(a): power to amend conferred (1.7.1992) by Social Security Administration Act 1992 (c. 5), ss. 143(1)(4), 192(4)