Operating expense statements document costs incurred during business operations and are transmitted by vendors, service providers, or operational units to their billing partners, customers, or parent organizations. The sender uses this transaction set to report itemized operating expenses for reimbursement, cost allocation, or financial reconciliation. The BOS (Beginning Segment for the Operating Expense Statement) initiates the transmission and establishes the statement’s context, while the JIL (Line Item Detail for the Operating Expense Statement) segment carries individual expense line items with associated costs and descriptions. The AMT (Monetary Amount) segment in the summary section provides the total expense amount claimed. Supporting segments like CUR (Currency), ITD (Terms of Sale/Deferred Terms of Sale), and the N1 loop enable specification of payment terms, currencies, and identification of the parties involved in the transaction.

Consider a distribution company, Logistics Partners Inc., that operates regional warehouses on behalf of RetailChain Corp. At the end of each month, Logistics Partners Inc. sends an 819 statement to RetailChain Corp. itemizing warehouse operating expenses: labor costs, utilities, equipment maintenance, and insurance charges broken down by facility. Each line item in the JIL loop specifies the expense category, amount, and measurement (such as kilowatt-hours for utilities or labor hours), while the summary AMT segment totals the monthly charges. RetailChain Corp. receives this statement for cost allocation across their business units and accounts payable processing, enabling them to reconcile actual operating expenses against budgeted amounts.