This study aims to explain the clearing mechanism at Bank Indonesia Lhokseumawe City, to determine the constraints that occur in the clearing mechanism. This research is a field study or also called the type of field research, which is obtaining data from research objects by collecting data extracted from field data sources, namely from informants. The conclusions that the authors conclude in this study are as follows: 1. The clearing mechanism is carried out with several mechanisms, first, the company (the bank) sends payment data to the sending bank, second, the sending bank sends the transaction to the SKNBI the receiving bank receives transaction data and funds from the settlement, then third, the receiving bank verifies the name and account number of the customer recipient, if it is not appropriate, the director must be in bulk format, fourth, the recipient bank will forward the transaction to the customer's account The obstacle faced by BI in the clearing mechanism is the existence of network disruptions during the clearing process, so that Bank Indonesia needs to conduct bilateral transactions or clearing processes between banks using the RTGS system. Network disruption can occur nationally or locally experienced by each region or office, especially the Bank in Lhokseumawe City. Keyword: Clearing Mechanism, Bank Indonesia.