Double Column cash Book
The double column cash book (also known as two column cash book) has two money columns on both debit and credit sides – one to record cash transactions and one to record bank transactions. In other words, we can say that if we add a bank column to both sides of a single column cash book, it would become a double column cash book. The cash column is used to record all cash transactions and works as a cash account whereas bank column is used to record all receipts and payments made by checks and works as a bank account. Both the columns are totaled and balanced like a traditional T-account at the end of an appropriate period which is usually one month.
Since a double column cash book provides cash as well as bank balance at the end of a period, some organizations prefer to maintain a double column cash book rather than maintaining two separate ledger accounts for recording cash and bank transactions.