Is increasing university fees due to late payment of installments considered usury, given that the delay is a result of economic hardship and not negligence?

It is not permissible to stipulate an increase for delaying the repayment of debts, whether the debt is a loan, a sale, or a lease. This is considered explicit usury (riba) and is forbidden by Islamic law. Islamic Fiqh Academies have affirmed this. The prohibition is further emphasized if the delay is due to insolvency, as the insolvent person must be granted respite until a time of ease. The sin falls upon the one who stipulates this increase.