Late charge

A late fee, also known as a late fine, is a charge levied against a client by an organization for not returning a rented or borrowed item by its due date. Its use is most commonly associated with businesses like video rental outlets and libraries. Late fees are generally calculated on per day, per item basis.
Organizations encourage the payment of late fees by suspending a client's borrowing or rental privileges until accumulated fees are paid, sometimes after these fees have exceeded a certain level.
Significant portions of the revenue of video rental outlets and libraries alike come from the payment of late fees.