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SCHEDULE 1 CALCULATION OF N AND M

PART I EARNINGS

Chapter 2Earnings of a self-employed earner

[F12A.(1) Subject to paragraphs F2... 2C, 4 and 5A, “earnings” in the case of employment as a self-employed earner shall have the meaning given by the following provisions of this paragraph.

(2) “Earnings” means the F3... taxable profits from self-employment of that earnerF4..., less the following amounts—

(a)any income tax relating to the taxable profits from the self-employment determined in accordance with sub-paragraph (3);

(b)any National Insurance Contributions relating to the taxable profits from the self-employ ment determined in accordance with sub-paragraph (4);

(c)one half of any premium paid in respect of a retirement annuity contract or a personal pension scheme or, where that scheme is intended partly to provide a capital sum to discharge a mortgage or charge secured upon the self-employed earner’s home, 37.5 per centum of the contributions payable.

(3) For the purposes of sub-paragraph (2)(a) the income tax to be deducted from the F5... taxable profits shall be determined in accordance with the following provisions—

(a)subject to head (d), an amount of earnings [F6calculated as if it were equivalent to any personal allowance which would be] applicable to the earner by virtue of the provisions of Chapter 1 of Part VII of the Income and Corporation Taxes Act 1988 (personal reliefs) shall be disregarded;

(b)subject to head (c), an amount equivalent to income tax shall be calculated in relation to the earnings remaining following the application of head (a) (the “remaining earnings”);

(c)the tax rate applicable at the effective date shall be applied to all the remaining earnings, where necessary increasing or reducing the amount payable to take account of the fact that the earnings relate to a period greater or less than one year;

(d)the amount to be disregarded by virtue of head (a) shall be calculated by reference to the yearly rate applicable at the effective date, that amount being reduced or increased in the same proportion to that which the period represented by the taxable profits bears to the period of one year.

(4) For the purposes of sub-paragraph (2)(b) above, the amount to be deducted in respect of National Insurance Contributions shall be the total of—

(a)the amount of Class 2 contributions (if any) payable under [F7section 11(2) or, as the case may be, (8)], of the Contributions and Benefits Act; and

(b)the amount of Class 4 contributions (if any) payable under section 15(2) of that Act,

at the rates applicable at the effective date.]

[F8(5) For the purposes of this paragraph, “taxable profits” means profits calculated in accordance with Part 2 of the Income Tax (Trading and Other Income) Act 2005.

(6) A self-employed earner who is a person with care or an absent parent shall provide to the Secretary of State on demand a copy of—

(a)any tax calculation notice issued to him by Her Majesty’s Revenue and Customs; and

(b)any revised notice issued to him by Her Majesty’s Revenue and Customs.]