Systems and methods of a reconciliation engine for accrual accounts associated with purchase order documents are provided. The reconciliation engine applies a set of business rules a set of purchase order documents for which the accrual account is nonzero. The business rules allow the system to determine discrepancies that are inconsequential and may be disregarded. Those accounts are marked for clearance and automatically cleared. An interface is provided to reverse the automatic clearance, as well as to adjust accrual accounts manually.