Expenses and Liabilities in Accounting

Overview

This lecture explains the difference between expenses and liabilities in accounting, particularly how each affects the accounting equation and owner's equity.

Expenses vs. Liabilities

• Expenses are costs incurred to generate revenue and appear on the income statement, reducing net income.
• Liabilities are debts or financial obligations that a business owes.
• Liabilities are one of the three elements of the accounting equation: assets = liabilities + owner's equity.
• Expenses reduce owner's equity and are one of four factors that can change owner's equity.

The Accounting Equation

• The accounting equation must always remain balanced: assets = liabilities + owner's equity.
• Investments, revenues, expenses, and withdrawals are the four items that change owner's equity.
• Expenses and withdrawals decrease owner's equity, while investments and revenues increase it.

Transaction Example: Borrowing and Car Payment

• Borrowing $4,000 for a car increases assets (car) and liabilities (note payable) by $4,000 each.
• Making a $400 car payment, with $300 interest and $100 principal, decreases cash (asset) by $400.
• Liabilities decrease by $100 (principal paid) and owner's equity decreases by $300 (interest expense).

Utility Bill Example

• Receiving a $500 utility bill for already used electricity increases liabilities by $500 (amount owed).
• At the same time, owner's equity decreases by $500 due to recording the utility expense.
• Assets are unchanged until the bill is paid; accounting equation remains balanced.

Key Terms & Definitions

• Expense — Money spent or cost incurred to earn revenue, reducing net income and owner's equity.
• Liability — A financial obligation or debt that the business owes to others.
• Accounting Equation — The foundational rule: assets = liabilities + owner's equity.
• Owner's Equity — The owner's claim on assets, changed by investments, revenues, expenses, and withdrawals.

Action Items / Next Steps

• Be prepared to answer what happens to the accounting equation when the utility bill is paid.