BIM39540 | Foreign exchange: gains or losses: capital or revenue: summary

From HM Revenue & Customs · Business Income Manual

The following guidelines will cover most cases and are intended to ensure consistency of approach.

Period of borrowingAmount of borrowing - FixedAmount of borrowing - Fluctuating
Less than 12 monthsRevenueRevenue
12 months or longerCapital‘Use’ test is relevant
Less than 12 months but renewable beyond thenRevenue but see Revenue but see

These guidelines should be applied flexibly and with common sense, for instance in deciding the nature of a borrowing for a period of less than, or not significantly more than, a year.