TutorialKart.comWhat Is the Accounting Equation?
The accounting equation states that a business’s total assets must equal the combined value of its liabilities and owner’s equity. It is the foundation of the balance sheet and the double-entry accounting system.
The basic accounting equation is:
Assets = Liabilities + Owner’s Equity
For a sole proprietorship, owner’s equity is also commonly called capital. The equation may therefore be written as:
Assets = Liabilities + Capital
The equation shows how the resources of a business are financed. Assets are financed either by amounts owed to creditors or by the owner’s interest in the business.
Accounting Equation Components: Assets, Liabilities, and Equity
| Component | Meaning | Common examples |
|---|---|---|
| Assets | Economic resources owned or controlled by the business | Cash, accounts receivable, inventory, equipment, buildings |
| Liabilities | Present obligations owed to lenders, suppliers, employees, or other parties | Accounts payable, bank loans, salaries payable |
| Owner’s equity | The residual interest in the assets after liabilities are deducted | Owner’s capital, retained earnings, less drawings or dividends |
Liabilities are not “debits to the company.” A liability is an obligation. Liability accounts normally have credit balances, while asset accounts normally have debit balances.
Rearranged Forms of the Accounting Equation
The basic equation can be rearranged to calculate an unknown amount:
- Owner’s Equity = Assets − Liabilities
- Liabilities = Assets − Owner’s Equity
For example, if a business has assets of $80,000 and liabilities of $30,000, its owner’s equity is $50,000:
$80,000 − $30,000 = $50,000
Why the Accounting Equation Must Always Balance
Every properly recorded transaction affects at least two accounts. This is the basis of double-entry bookkeeping. After a transaction is entered, the total value on the asset side must continue to equal the total of liabilities and owner’s equity.
The accounting equation and the debit-credit rule are related, but they are not identical. The equation explains the relationship among financial statement elements. Debit and credit rules explain how increases and decreases are entered in individual accounts. In a balanced journal entry, total debits equal total credits.
For additional background on account classifications and normal balances, refer to debit and credit in accounting, accounts in accounting, and the golden rules of accounting.
Accounting Equation Example: Owner Investment and Bank Loan
Suppose a firm starts with total assets of $130,000. Of this amount, $90,000 is financed through a bank loan and $40,000 is contributed by the owner.
- Total assets: $130,000
- Bank loan liability: $90,000
- Owner’s equity: $40,000
The accounting equation is:
$130,000 = $90,000 + $40,000
The equation balances because the company’s assets are financed by both creditor claims and the owner’s claim.
Accounting Equation Example: Purchasing Inventory for Cash
Assume an owner contributes $1,000 and the business borrows $500 from a bank. The business initially has $1,500 in cash.
| Stage | Cash | Inventory | Total assets | Bank loan | Owner’s equity |
|---|---|---|---|---|---|
| After financing | $1,500 | $0 | $1,500 | $500 | $1,000 |
| After buying $400 of inventory for cash | $1,100 | $400 | $1,500 | $500 | $1,000 |
The inventory purchase changes the composition of assets but does not change total assets. Cash decreases by $400 and inventory increases by $400.
$1,100 Cash + $400 Inventory = $500 Liabilities + $1,000 Owner’s Equity
Therefore:
$1,500 = $1,500
Accounting Equation Example: Machinery Purchased with Cash and a Loan
Suppose a business purchases machinery costing $50,000. It pays $20,000 in cash and finances the remaining $30,000 with a bank loan.
The journal entry is:
| Particulars | Debit | Credit |
|---|---|---|
| Machinery | $50,000 | |
| Cash | $20,000 | |
| Bank Loan Payable | $30,000 |
Machinery, an asset, increases by $50,000. Cash, another asset, decreases by $20,000. The bank loan liability increases by $30,000. The net increase in assets is therefore $30,000, which equals the increase in liabilities.
| Effect on assets | Effect on liabilities | Effect on equity |
|---|---|---|
| +$50,000 machinery − $20,000 cash = +$30,000 | +$30,000 bank loan | No change |
How Common Transactions Affect the Accounting Equation
| Transaction | Assets | Liabilities | Owner’s equity |
|---|---|---|---|
| Owner invests cash | Increase | No change | Increase |
| Business borrows money | Increase | Increase | No change |
| Equipment is bought for cash | One asset increases and another decreases | No change | No change |
| Supplies are purchased on credit | Increase | Increase | No change |
| Revenue is earned in cash | Increase | No change | Increase |
| An operating expense is paid | Decrease | No change | Decrease |
| A creditor is paid | Decrease | Decrease | No change |
| Owner withdraws cash | Decrease | No change | Decrease |
Expanded Accounting Equation for Revenue, Expenses, and Drawings
The basic equation can be expanded to show the activities that change owner’s equity:
Assets = Liabilities + Owner’s Capital + Revenue − Expenses − Drawings
- Owner’s capital increases equity when the owner invests resources in the business.
- Revenue increases equity because it increases the business’s net assets from earning activities.
- Expenses decrease equity because they represent resources consumed while earning revenue.
- Drawings decrease equity when the owner removes business assets for personal use.
For a corporation, the equity section may instead be expressed using share capital, retained earnings, revenues, expenses, and dividends.
Step-by-Step Accounting Equation Table
Consider the following sequence of transactions:
- The owner invests $20,000 cash.
- The business borrows $5,000 from a bank.
- Equipment costing $6,000 is purchased for cash.
- Services worth $3,000 are provided for cash.
- Rent expense of $1,000 is paid.
- The owner withdraws $500 cash.
| Transaction | Assets | Liabilities | Owner’s equity | Equation check |
|---|---|---|---|---|
| Opening balances | $0 | $0 | $0 | $0 = $0 + $0 |
| Owner invests $20,000 | $20,000 | $0 | $20,000 | $20,000 = $0 + $20,000 |
| Bank loan of $5,000 | $25,000 | $5,000 | $20,000 | $25,000 = $5,000 + $20,000 |
| Equipment bought for $6,000 cash | $25,000 | $5,000 | $20,000 | $25,000 = $5,000 + $20,000 |
| Cash revenue of $3,000 | $28,000 | $5,000 | $23,000 | $28,000 = $5,000 + $23,000 |
| Rent of $1,000 paid | $27,000 | $5,000 | $22,000 | $27,000 = $5,000 + $22,000 |
| Owner withdraws $500 | $26,500 | $5,000 | $21,500 | $26,500 = $5,000 + $21,500 |
The equipment purchase does not change total assets because one asset, cash, decreases while another asset, equipment, increases by the same amount. Revenue increases equity, while rent expense and drawings decrease equity.
Accounting Equation and the Balance Sheet
The balance sheet follows the same structure as the accounting equation. It reports assets on one side and liabilities plus equity on the other. The balance sheet balances because the two sides represent different views of the same resources:
- Assets show what resources the business controls.
- Liabilities show the portion financed by creditors.
- Equity shows the residual portion attributable to owners.
If a balance sheet does not satisfy the accounting equation, the records may contain an omitted transaction, an incorrect amount, a posting error, or a classification problem. However, a balanced equation does not by itself prove that every transaction has been recorded correctly, because equal debit and credit errors can still occur.
Common Accounting Equation Errors
- Treating a liability as a debit: A liability is an obligation and normally carries a credit balance.
- Recording a financed asset at only the cash amount: An asset purchased partly with cash and partly with a loan must be recorded at its full acquisition cost.
- Ignoring the effect of revenue and expenses on equity: Revenue increases equity, while expenses reduce it.
- Assuming every asset purchase increases total assets: A cash purchase may only exchange one asset for another.
- Confusing drawings with expenses: Owner withdrawals reduce equity but are not business operating expenses.
- Believing a balanced equation guarantees error-free records: Some mistakes affect both sides equally and therefore do not cause an imbalance.
Accounting Equation Practice Questions with Solutions
Calculate Owner’s Equity from Assets and Liabilities
A business has assets of $75,000 and liabilities of $28,000. Calculate owner’s equity.
Owner’s Equity = Assets − Liabilities
Owner’s Equity = $75,000 − $28,000 = $47,000
Calculate Liabilities from Assets and Equity
A company has assets of $120,000 and equity of $85,000. Calculate liabilities.
Liabilities = Assets − Equity
Liabilities = $120,000 − $85,000 = $35,000
Find Assets After a Credit Purchase
A business initially has assets of $40,000, liabilities of $15,000, and equity of $25,000. It purchases $4,000 of supplies on credit.
Supplies increase assets by $4,000, and accounts payable increases liabilities by $4,000. The new balances are:
$44,000 Assets = $19,000 Liabilities + $25,000 Equity
Frequently Asked Questions About the Accounting Equation
What is the accounting equation with an example?
The accounting equation is Assets = Liabilities + Owner’s Equity. If a business has $60,000 in assets, $25,000 in liabilities, and $35,000 in equity, the equation is $60,000 = $25,000 + $35,000.
What is the accounting equation for Class 11?
The basic accounting equation taught at the Class 11 level is Assets = Liabilities + Capital. Its expanded form may include revenue, expenses, and drawings to explain changes in capital during an accounting period.
Why is the accounting equation called the balance sheet equation?
It is called the balance sheet equation because the balance sheet presents assets as equal to liabilities plus equity. The equation is the underlying structure of that financial statement.
Can a transaction affect only one side of the accounting equation?
A transaction may affect accounts located on only one side, but at least two accounts must still change. For example, buying equipment for cash increases equipment and decreases cash. Both are assets, so total assets and the other side of the equation remain unchanged.
Does a balanced accounting equation mean the accounts are correct?
Not necessarily. A balanced equation confirms that the recorded totals satisfy the mathematical relationship, but errors may still exist if an incorrect amount was entered equally as a debit and a credit, or if a transaction was omitted entirely.
Accounting Equation Editorial Review Checklist
- Confirm that every example satisfies Assets = Liabilities + Owner’s Equity after each transaction.
- Check that liabilities are described as obligations rather than as debits.
- Verify that assets purchased partly with cash and partly through borrowing are recorded at their full cost.
- Confirm that revenue increases equity and that expenses and drawings decrease equity.
- Check that journal-entry debits and credits are equal and agree with the equation analysis.
- Ensure that cash purchases exchanging one asset for another do not incorrectly change total assets.
- Use consistent currency symbols and amounts throughout each accounting equation example.