The fundamental equation: assets = liabilities + equity
The balance sheet is a snapshot of what a company owns (assets) and how it's funded (liabilities + equity) at a single point in time. Unlike the income statement (which covers a period), the balance sheet is a moment.
The fundamental identity is the seesaw from Track 1 lesson 1, applied to corporate finance:
Read it as: everything the company has = everything it owes to creditors + everything it owes to shareholders. The two sides of the seesaw must balance — that's where the name "balance sheet" comes from.
The left side — assets
What the company owns or has claim to. Usually grouped by liquidity (how fast they can become cash):
- Current assets — convertible to cash within a year: cash itself, accounts receivable (money customers owe you), inventory.
- Non-current (long-term) assets — used for the long haul: property, plant, equipment (PP&E), long-term investments, intangibles like goodwill, brands, patents.
Total assets = current + non-current.
The right side — liabilities + equity
How those assets are funded:
- Current liabilities — owed within a year: accounts payable (money you owe suppliers), short-term debt, taxes payable.
- Long-term liabilities — owed beyond a year: long-term debt, pension obligations, deferred taxes.
- Shareholders' equity — what's left for owners after creditors are paid: paid-in capital (money raised from issuing stock) + retained earnings (accumulated profits not paid out as dividends).
Total liabilities + equity = total assets, by construction.
Why retained earnings is the bridge
Recall lesson 5-1's connection: net income from the income statement flows into retained earnings on the balance sheet. So if a company earns ₩100 in net income and pays out ₩30 in dividends, retained earnings grows by ₩70 that period. Over decades, retained earnings becomes the cumulative undistributed profit of the company — which is why mature, profitable companies have huge retained earnings on their balance sheets.
What the balance sheet tells you (and doesn't)
Tells you:
- How leveraged the company is (total liabilities vs. equity)
- How liquid it is (current assets vs. current liabilities — the current ratio)
- Asset composition (heavy fixed assets like a factory? mostly intangibles like a software company?)
- Capital structure (how much debt vs. equity finances operations)
Doesn't tell you:
- How profitable the company is (income statement)
- How much cash actually moved (cash flow statement)
- Future prospects directly (you have to combine all three statements with judgment)
Quick health checks
Two ratios that come straight from the balance sheet:
- Debt-to-equity = Total debt / Equity. High = leveraged (more risk; more reward when things work). Low = conservative.
- Current ratio = Current assets / Current liabilities. Below 1 = trouble paying short-term obligations. 1.5-2 is typical for healthy companies.
Both are numerator-denominator play. Both will appear again in lesson 5-5.
The takeaway
Balance sheet = snapshot of state right now. Assets = liabilities + equity (the seesaw). Assets grouped by liquidity. Liabilities by maturity. Equity = paid-in capital + retained earnings. Net income from income statement flows into retained earnings. Useful for assessing leverage, liquidity, and capital structure — less useful for current period profitability or cash movement.