22.—(1) For the purposes of regulation 15 (average weekly earnings of self-employed earners) the earnings of a claimant to be taken into account shall be—
(a)in the case of a self-employed earner who is engaged in employment on his own account, the net profit derived from that employment;
(b)in the case of a self-employed earner whose employment is carried on in partnership or is that of a share fisherman within the meaning of the Social Security (Mariners' Benefits) Regulations 1975(1), his share of the net profit derived from that employment, less—
(i)an amount in respect of income tax and of social security contributions payable under the Contributions and Benefits Act 1992 calculated in accordance with regulation 23 (deduction of tax and contributions for selfemployed earners), and
(ii)one-half of any qualifying premium payable.
(2) There shall be disregarded from a claimant’s net profit, any sum, where applicable, specified in paragraphs 1 to 12 of Schedule 3.
(3) For the purposes of paragraph (1)(a) the net profit of the employment shall, except where paragraph (9) applies, be calculated by taking into account the earnings of the employment over the assessment period less—
(a)subject to paragraphs (5) to (7), any expenses wholly and exclusively incurred in that period for the purposes of that employment;
(b)an amount in respect of—
(i)income tax, and
(ii)social security contributions payable under the Contributions and Benefits Act 1992, calculated in accordance with regulation 23 (deduction of tax and contributions for self-employed earners); and
(c)one-half of any qualifying premium payable.
(4) For the purposes of paragraph (1)(b) the net profit of the employment shall be calculated by taking into account the earnings of the employment over the assessment period less, subject to paragraphs (5) to (7), any expenses wholly and exclusively incurred in that period for the purposes of the employment.
(5) Subject to paragraph (6), no deduction shall be made under paragraph (3)(a) or (4), in respect of—
(a)any capital expenditure;
(b)the depreciation of any capital asset;
(c)any sum employed or intended to be employed in the setting up or expansion of the employment;
(d)any loss incurred before the beginning of the assessment period;
(e)the repayment of capital on any loan taken out for the purposes of the employment;
(f)any expenses incurred in providing business entertainment; and
(g)any debts, except bad debts proved to be such, but this sub-paragraph shall not apply to any expenses incurred in the recovery of a debt.
(6) A deduction shall be made under paragraph (3)(a) or (4) in respect of the repayment of capital on any loan used for—
(a)the replacement in the course of business of equipment or machinery; and
(b)the repair of an existing business asset except to the extent that any sum is payable under an insurance policy for its repair.
(7) The appropriate authority shall refuse to make a deduction in respect of any expense under paragraph (3)(a) or (4) where it is not satisfied given the nature and the amount of the expense that it has been reasonably incurred.
(8) For the avoidance of doubt—
(a)a deduction shall not be made under paragraph (3)(a) or (4) in respect of any sum unless it has been expended for the purposes of the business;
(b)a deduction shall be made thereunder in respect of—
(i)the excess of any value added tax paid over value added tax received in the assessment period,
(ii)any income expended in the repair of an existing business asset except to the extent that any sum is payable under an insurance policy for its repair,
(iii)any payment of interest on a loan taken out for the purposes of the employment.
(9) Where a claimant is engaged in employment as a child minder the net profit of the employment shall be one-third of the earnings of that employment, less—
(a)an amount in respect of—
(i)income tax, and
(ii)social security contributions payable under the Contributions and Benefits Act 1992, calculated in accordance with regulation 23 (deduction of tax and contributions for self-employed earners); and
(b)one-half of any qualifying premium payable.
(10) For the avoidance of doubt, where a claimant is engaged in employment as a selfemployed earner and he is also engaged in one or more other employments as a selfemployed earner or employed earner any loss incurred in any one of his employments shall not be offset against his earnings in any other of his employments.
(11) In this regulation “qualifying premium” means any premium or other consideration payable under an annuity contract for the time being approved by the Board of Inland Revenue as having for its main object the provision for the claimant of a life annuity in old age or the provision of an annuity for his partner or for any one or more of his dependants and in respect of which relief for income tax may be given.
S.I. 1975/529.