Section 664 | Meaning of certain expressions in section 663
From legislation.gov.uk
1 April 2026
(1)This section applies for the purposes of section 663.
(2)If for an accounting period L exceeds G, there are net section 641 losses for the period of an amount equal to the excess.
(3)If for an accounting period G exceeds the sum of L and N, there are net section 641 gains for the period of an amount equal to the excess.
(4)In this section—
G is the sum of the amounts of any chargeable gains treated as accruing to the company in the period under section 641(3)(a) in respect of derivative contracts of the company (“section 641 gains”),
L is the sum of the amounts of any allowable losses treated as accruing to the company in the period under section 641(3)(b) in respect of derivative contracts of the company (“section 641 losses”), and
N is the sum of the amounts of any non-section 641 losses which would fall to be deducted in the period from section 641 gains, on the assumption in subsection (5).
(5)That assumption is that, as respects the accounting period, non-section 641 losses are treated as being deducted from non-section 641 gains, so far as possible, before any remainder is deducted from section 641 gains.
(6)The “appropriate fraction” is—
Formula
where—
A is the number of days in the gains period which fall within the 24 month period mentioned in section 663(1)(c), and
B is the number of days in the gains period.
(7)In this section—
“deducted” means deducted in accordance with section 8(1) of TCGA 1992 (company's total profits to include chargeable gains),
“the gains period” has the same meaning as in section 663,
“non-section 641 gains” means any chargeable gains accruing to the company in the accounting period, other than section 641 gains, and
“non-section 641 losses” means any allowable losses of the company which may be deducted in the accounting period, other than section 641 losses.