Unit
- Double-entry principle: Every financial transaction affects at least two accounts, with total debits equal to total credits. This system ensures the accounting equation (Assets = Liabilities + Equity) remains in balance after each entry. For example, a cash purchase of equipment increases Equipment (debit) and decreases Cash (credit).
- Debit vs. credit rules: Debits increase asset and expense accounts, while credits increase liability, equity, and revenue accounts. For each account type, the normal balance (the side that increases) is fixed. Understanding these rules is essential for correctly recording any transaction.
- Journal entry structure: A basic journal entry includes the date, accounts debited and credited, amounts, and a brief description. The debit entry is listed first, followed by the credit entry indented slightly. Total debits must equal total credits.
- T-accounts and ledger posting: T-accounts visually represent the effect of debits and credits on individual accounts. After journalizing, entries are posted to the general ledger, which aggregates all transactions by account. This step creates a trail for audit and reconciliation.
- Trial balance verification: After posting, a trial balance lists all accounts with their ending balances. Total debits must equal total credits. Discrepancies indicate errors such as mispostings or incorrect debit-credit application.
- Common source documents: Transactions originate from invoices, receipts, contracts, bank statements, and approval forms. Each journal entry should reference its source document for audit purposes. Proper documentation reduces errors and supports internal controls.
- Fictional case example: Riverstream Capital received a $10,000 invoice for office rent. The entry: debit Rent Expense $10,000, credit Cash $10,000. This illustrates the expense increase and asset decrease.
- Error detection techniques: If a trial balance does not balance, verify the addition of debits and credits, check for transposition errors (e.g., $1,200 vs $2,100), and ensure all entries have been posted. Use a suspense account pending resolution.
- Chart of accounts structure: A chart of accounts lists all account names and numbers used by an entity. It organizes accounts into categories: assets, liabilities, equity, revenue, and expenses. Consistent numbering helps with classification and reporting. Journal entries reference accounts from this chart to ensure uniformity across periods.
- Cash basis vs. accrual basis: Under cash basis, revenue is recorded when cash is received and expenses when paid. Accrual basis records revenue when earned and expenses when incurred, regardless of cash flow. Most professional entities use accrual accounting because it matches revenues with expenses in the correct period.
- Adjusting entries: At the end of an accounting period, adjusting entries update accounts for accruals, deferrals, and estimates. Common examples include recording prepaid expenses used, accrued salaries, and depreciation. These entries ensure that revenues and expenses are recognized in the correct period, aligning with the matching principle.
- Reversing entries: Some adjusting entries, such as accrued expenses and revenues, can be reversed at the start of the next period. Reversing entries simplify recording subsequent transactions by eliminating the need to track prior adjustments. They are optional but can reduce errors in routine entries.
Financial Formula
Accounting Equation
Assets = Liabilities + Equity
Assets = Liabilities + Equity
Where:
- Assets: Resources owned or controlled by the entity (e.g., cash, inventory, equipment)
- Liabilities: Obligations to transfer resources to others (e.g., accounts payable, loans)
- Equity: Residual interest in assets after deducting liabilities (e.g., common stock, retained earnings)
- Debit/Credit relationship: Increases in assets are debited; increases in liabilities and equity are credited.
Regulatory Requirement
Regulation: GAAP (ASC 210) and IFRS (IAS 1)
Both frameworks require that financial statements present a true and fair view of the entity's financial position. The double-entry system is the foundation for achieving this. Journal entries must be supported by adequate documentation and retained for audit review. Non-compliance can lead to restatements and regulatory penalties.
Quick Revision
- Double-entry ensures every transaction maintains the accounting equation.
- Debits increase assets and expenses; credits increase liabilities, equity, and revenues.
- Journal entries must have equal debits and credits, with supporting documentation.
- T-accounts help visualize posting effects; trial balance checks equality.
- GAAP and IFRS require double-entry as a baseline for reliable reporting.