Debt Cap: the available amount: late interest mismatches
Where interest is due to a creditor with whom the debtor is connected and the creditor is not within the charge to corporation tax, for example because it is non-resident, then the accrued interest is not allowed as a loan relationship debit for the debtor until it is paid if the interest is paid later than 12 months from the end of accounting period in which it accrues. (CTA09/PT5/CH8).
For debt cap the computation of the tested expense amount is partly by reference to the loan relationship debits in a UK company’s accounts so where a company pays the interest late this will create a mismatch between the tested expense amount and the available amount.
Regulations 5 to 8 of the Mismatch Regulations deals with this by including within the available amount the amount of the debit for the year in which it is paid to the extent that it is not already included within the available amount. Although the Regulations refer to amounts brought into account as loan relationships under CTA09/PT5 in practise they also include loan debits under CTA09/PT3 (trading income).
Further details on late interest can be found at CFM35800 onwards.