The benefits code: when must making good take place?
Section 203(2) ITEPA 2003 The legislation does not set a time limit on the “making good”. This will usually happen shortly after the expense is incurred by the person providing the benefit. But you need not object to a belated “making good” if it is done within a reasonable time of the employee becoming aware that the chargeable benefit can be reduced, in whole or in part, by reimbursing the expense incurred by the provider.
What constitutes a “reasonable time” will depend on the facts of the case. Do not allow a deduction for “making good” which takes place after a charge to tax on the benefit concerned has become final and conclusive.