overpayment

This term is primarily used in financial, legal, and administrative contexts. It carries a neutral to slightly negative connotation, as it implies an error in calculation or a lack of diligence in negotiation. In a corporate or banking setting, it often triggers a formal process of reconciliation or a refund request.

While the word describes a specific sum of money, it can also refer to the general action of paying too much. It is distinct from "overcharging," which focuses on the seller's action of asking for too much, whereas "overpayment" focuses on the payer's action or the resulting balance.