538Change of partnership shares
(1)This section applies if a company is a party to relevant arrangements under which—
(a)it makes a capital contribution to a firm of which it is a member,
(b)profits of the firm fall to be shared in such a way that the company is not allocated the whole of its due share of the profits (see subsection (7)), and
(c)the capital of the firm falls to be shared in such a way that the company or a person connected with the company is entitled to more than the whole of the company’s due share of the capital (see subsection (7)).
(2)In subsection (1) “relevant arrangements” means arrangements—
(a)which are designed to produce for the company a return which equates, in substance, to a return on the investment of the capital contribution at a commercial rate of interest, and
(b)of which the purpose, or one of the main purposes, is to secure a tax advantage.
(3)The return is treated for the purposes of Part 5 as a profit from a loan relationship of the company.
(4)The credits to be brought into account in respect of the loan relationship are to be determined on the amortised cost basis of accounting.
(5)Subsection (6) applies if the return to any extent represents profits of the firm in respect of which the company is chargeable to corporation tax (whether for the same or any earlier accounting period).
(6)The charge to corporation tax is to be reduced to such extent as is just and reasonable.
(7)For the purposes of subsection (1) a company’s “due share” of any profits or capital is the share which the company would have been allocated or entitled to if allocation or entitlement were determined by reference to the proportion of the total capital contributed to the firm which was contributed by the company.