Bookkeeping (also book-keeping or book keeping) is the recording of all financial transactions undertaken by an individual or organization. The organization may be a business, a charitable organization or even a local sports club. Bookkeeping is "keeping records of what is bought, sold, owed, and owned; what money comes in, what goes out, and what is left." [1] A financial transaction is any event that involves money.

Individual and family bookkeeping involves keeping track of income and expenses in a cash account record, checking account register, or savings account passbook. Individuals who borrow or lend money track how much they owe to others or are owed from others.

Bookkeeping may be performed using paper and a pen or pencil. With increasing complexity in tax regulations and to minimize calculation errors, many organizations use accounting software.

Two common bookkeeping methods used by businesses and other organizations are the single-entry bookkeeping system and the double-entry bookkeeping system. Single-entry bookkeeping uses only income and expense accounts, recorded primarily in a "Revenue and Expense Journal". Single-entry bookkeeping is adequate for many small businesses. Double-entry bookkeeping requires posting (recording) each transaction twice, using debits and credits.[2]

A bookkeeper (or book-keeper), sometimes called an accounting clerk in the United States, is a person who records the day-to-day financial transactions of an organization.[3] A bookkeeper is usually responsible for writing up the "daybooks." The daybooks consist of purchase, sales, receipts and payments. The bookkeeper is responsible for ensuring all transactions are recorded in the correct daybook, suppliers ledger, customer ledger and general ledger. The bookkeeper brings the books to the trial balance stage. An accountant may prepare the profit and loss statement and balance sheet using the trial balance and ledgers prepared by the bookkeeper.

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