85 Authorised accounting methods.U.K.
(1)Subject to the following provisions of this Chapter, the alternative accounting methods that are authorised for the purposes of this Chapter are—
(a)an accruals basis of accounting; and
(b)a mark to market basis of accounting under which any loan relationship to which that basis is applied is brought into account in each accounting period at a fair value.
(2)An accounting method applied in any case shall be treated as authorised for the purposes of this Chapter only if—
(a)it conforms (subject to paragraphs (b) and (c) below) to normal accountancy practice, as followed in cases where such practice allows the use of that method;
(b)it contains proper provision for allocating payments under a loan relationship to accounting periods; and
(c)where it is an accruals basis of accounting, it does not contain any provision (other than provision comprised in authorised arrangements for bad debt) that gives debits by reference to the valuation at different times of any asset representing a loan relationship.
(3)In the case of an accruals basis of accounting, proper provision for allocating payments under a loan relationship to accounting periods is provision which—
(a)allocates payments to the period to which they relate, without regard to the periods in which they are made or received or in which they become due and payable;
(b)includes provision which, where payments relate to two or more periods, apportions them on a just and reasonable basis between the different periods;
(c)assumes, subject to authorised arrangements for bad debt, that, so far as any company in the position of a creditor is concerned, every amount payable under the relationship will be paid in full as it becomes due;
(d)secures the making of the adjustments required in the case of the relationship by authorised arrangements for bad debt; and
(e)provides, subject to authorised arrangements for bad debt and for writing off government investments, that, where there is a release of any liability under the relationship, the appropriate amount in respect of the release is credited to the debtor in the accounting period in which the release takes place.
(4)In the case of a mark to market basis of accounting, proper provision for allocating payments under a loan relationship to accounting periods is provision which allocates payments to the accounting period in which they become due and payable.
(5)In this section—
(a)the references to authorised arrangements for bad debt are references to accounting arrangements under which debits and credits are brought into account in conformity with the provisions of paragraph 5 of Schedule 9 to this Act; and
(b)the reference to authorised arrangements for writing off government investments is a reference to accounting arrangements that give effect to paragraph 7 of that Schedule.
(6)In this section “fair value”, in relation to any loan relationship of a company, means the amount which, at the time as at which the value falls to be determined, is the amount that the company would obtain from or, as the case may be, would have to pay to an independent person for—
(a)the transfer of all the company’s rights under the relationship in respect of amounts which at that time are not yet due and payable; and
(b)the release of all the company’s liabilities under the relationship in respect of amounts which at that time are not yet due and payable.