Kuwait Court of Cassation principle number 1179

Default interest. When it becomes payable. - Commercial debt. Delay in paying it on its due date. Gives rise to damage merely upon its occurrence. - The meaning of the subject matter of the obligation being of a known amount when it arises is that the determination of the amount claimed must not be subject to the court’s absolute discretion. - Determination of the amount on fixed, agreed bases, without the court having broad discretion in its assessment. It is deemed of a known amount from its inception, even if the debtor disputes its amount.