The fundamental equation
Everything in accounting flows from one identity:
Assets = Liabilities + Shareholders' Equity
Assets are what the company controls — cash, property, patents, receivables. Liabilities are obligations to others — loans, unpaid bills, deferred revenue. Equity is the residual: what shareholders would theoretically receive if all assets were sold and all debts repaid. The equation always balances — hence "balance sheet."
A simplified balance sheet
| Assets | £m | Liabilities & Equity | £m |
|---|---|---|---|
| Current assets | Current liabilities | ||
| Cash | 500 | Accounts payable | 300 |
| Receivables | 800 | Short-term debt | 400 |
| Inventory | 400 | Long-term liabilities | |
| Non-current assets | Long-term debt | 1,200 | |
| Property & equipment | 2,000 | Shareholders' equity | |
| Intangibles & goodwill | 500 | Share capital + retained earnings | 2,300 |
| Total assets | 4,200 | Total liabilities + equity | 4,200 |
Key ratios from the balance sheet
The balance sheet powers several critical metrics. The current ratio (current assets ÷ current liabilities) measures short-term liquidity — can the company pay its bills? A ratio above 1 is generally healthy. The debt-to-equity ratio (total debt ÷ equity) shows how leveraged the company is. The book value per share (equity ÷ shares outstanding) gives a floor valuation.
What the balance sheet can't tell you
The balance sheet shows position at one moment — not momentum. A company can look healthy on its balance sheet while its income is collapsing. It also relies on accounting judgements: the value of intangibles like brand equity or patents, or provisions for future losses, are estimates. Always read the balance sheet alongside the income statement and cash flow statement.
"A strong balance sheet doesn't guarantee success, but a weak one dramatically raises the probability of failure." — Howard Marks
What this means for you
For investors, the balance sheet answers one question above all: can this company survive a downturn? Companies with lots of cash, manageable debt, and assets that can be sold if needed are resilient. Companies with heavy debt and few liquid assets are fragile. Learning to read a balance sheet is the single most useful financial literacy skill for anyone evaluating stocks or business health.