57.—(1) This regulation applies for the purpose of calculating earned income that is not employed earnings and is derived from carrying on a trade, profession or vocation (“self employed earnings”).
(2) A person’s self-employed earnings in respect of an assessment period are to be calculated as follows—
Calculate the amount of the person’s profit or loss in respect of each trade, profession or vocation carried on by the person by—
(a)taking the actual receipts in that assessment period, and
(b)deducting any amounts allowed as expenses under regulation 59 or 60.
Where a trade, profession or vocation is carried on in a partnership, take the amount of the profit or loss attributable to the person’s share in the partnership.
If the person has carried on more than one trade, profession or vocation in the assessment period, add together the amounts resulting from step 1 in respect of each trade, profession or vocation.
Deduct from the amount resulting from step 1 or (if applicable) step 2 any payment made by the person to HMRC in the assessment period in respect of—
(c)Class 2 contributions under section 11(2), (6) or (8) of the Contributions and Benefits Act or Class 4 contributions under section 15 of that Act, or
(d)income tax incurred by virtue of carrying on a trade, profession or vocation.
If the amount resulting from steps 1 to 3 is nil or a negative amount, the amount of the person’s self-employed earnings in respect of the assessment period is nil (and ignore the following steps).
If the amount resulting from step 3 is greater than nil, deduct from that amount any relievable pension contributions made by the person in the assessment period (unless a deduction has been made in respect of those contributions in calculating the person’s employed earnings).
If the amount resulting from this step is nil or a negative amount, the person’s self-employed earnings in respect of the assessment period are nil (and ignore the following step).
If the amount resulting from step 4 is greater than nil, deduct from that amount any unused losses (see regulation 58), taking the oldest first.
If the amount resulting from this step is greater than nil, that is the amount of the person’s self-employed earnings for the assessment period.
If the amount resulting from this step is nil or a negative amount, the amount of the person’s self-employed earnings in respect of the assessment period is nil.
(3) The receipts referred to in paragraph (2) include receipts in kind and any refund or repayment of income tax, value added tax or national insurance contributions relating to the trade, profession or vocation.
(4) Where the purchase of an asset has been deducted as an expense in any assessment period and, in a subsequent assessment period, the asset is sold or ceases to be used for the purposes of a trade, profession or vocation carried on by the person, the proceeds of sale (or, as the case may be, the amount that would be received for the asset if it were sold at its current market value) are to be treated as a receipt in that subsequent assessment period.
(5) Where the person is a self-employed earner in the Republic of Ireland the amounts to be deducted for income tax and National Insurance contributions under this regulation shall be such amounts as, in the opinion of the Department, would have been deducted had that person been employed in Northern Ireland.