Double-entry bookkeeping
Also known as: double-entry accounting
Double-entry bookkeeping is a system in which every transaction is recorded in at least two accounts — a debit in one and an equal credit in another. It keeps the accounting equation in balance and provides a built-in check on recording errors.
Double-entry bookkeeping is the foundation of modern accounting. Every transaction affects at least two accounts and is recorded with equal debits and credits. Because every entry has two sides, the accounting equation — assets = liabilities + equity — always stays in balance, and total debits across the ledger always equal total credits.
Consider a business that buys $5,000 of equipment with cash. The equipment account (an asset) is debited $5,000, and the cash account (also an asset) is credited $5,000. If the same equipment were bought on credit, the credit would instead go to accounts payable, a liability. The rules are consistent: debits increase assets and expenses, while credits increase liabilities, equity, and income. Each transaction is first captured in the books of prime entry and then posted to the general ledger, where every account accumulates its debits and credits.
The system's power lies in its self-checking nature. At the end of a period, accountants prepare a trial balance listing every account's balance; if total debits do not equal total credits, an error exists somewhere in the records. Double-entry also makes it possible to produce the financial statements — the statement of financial position flows directly from the balanced ledger.
Double-entry bookkeeping is a core topic on the ACCA Financial Accounting (FA) exam, which tests recording transactions in the general ledger, preparing a trial balance, and correcting errors.
Key takeaways
- Every transaction is recorded with equal debits and credits in at least two accounts.
- Debits increase assets and expenses; credits increase liabilities, equity, and income.
- The system keeps the accounting equation (assets = liabilities + equity) permanently in balance.
- A trial balance verifies that total debits equal total credits, exposing many recording errors.
- The ACCA FA exam tests double-entry mechanics directly, from recording transactions to preparing the trial balance.