Gartner defines a core banking system (CBS) as the financial institution’s back‐office software that performs real-time or end-of-day processing for deposits and loans. Apart from advancing the processing dates, representative capabilities include transaction posting, interest accrual/payment, service charge calculation and cash management (zero balance, target balance). CBSs provide deposit and loan product servicing with interfaces to other applications, such as customer-facing channels, general ledger systems and reporting tools. CBSs can be deployed on the bank’s premises or run from the cloud or any hosted environment. Bank employees and customers either directly or indirectly use the bank’s CBS.