The Accounting Equation
The foundation of double-entry bookkeeping and every balance sheet ever created.
What It Tells You
The accounting equation states that everything a company owns (assets) is financed by what it owes (liabilities) plus what the owners have invested and retained (equity). It must always balance — if one side changes, the other must change by the same amount. This equation is the structural backbone of the balance sheet and ensures that a company's books stay in equilibrium.
Components
- AssetsEverything the business owns that has value — cash, inventory, equipment, accounts receivable, and property.
- LiabilitiesObligations the business owes to others — loans, accounts payable, accrued expenses, and bonds payable.
- EquityThe owners' residual interest after subtracting liabilities from assets — includes contributed capital and retained earnings.
Worked Example
Company with $500,000 in assets and $200,000 in liabilities
Why It Matters
The accounting equation is the bedrock of financial reporting. Auditors and accountants rely on it to verify that every transaction has been recorded correctly. If assets do not equal liabilities plus equity, there is an error somewhere in the books.
Business owners use this equation to quickly gauge how much of the company is funded by debt versus ownership. A high proportion of liabilities relative to equity can signal financial risk, while strong equity indicates a healthier financial position.