The Identity That Cannot Balance
All accounting rests on one identity: . Every resource has a source. The two sides count one pool of value twice: once by what it is, once by who financed it.
| Family | What it holds | Examples |
|---|---|---|
| Assets | Resources controlled | Cash, inventory, machines, receivables |
| Liabilities | Creditors' claims | Loans, supplier invoices, taxes |
| Equity | Owners' residual | Contributed capital, retained profits |
Equity as the residual: . Owners absorb losses first. Equity is also called net worth.
Transactions preserve the identity: Buy a machine for cash: one asset up, one down. Take a loan: assets and liabilities up. No legal transaction breaks it; imbalances mean recording errors.
Two Views of One Pool
Think of a firm as a water tank. The asset side labels the water by form (cash, inventory). The financing side labels it by source (lenders, owners).
- Transactions are re-labelings: Buying inventory shifts asset forms. Borrowing adds water; both sides rise.
- Profit is a flow: Revenue pours in, expenses drain out. The net inflow settles into equity.
Pitfall: Equity is not cash. It is a residual claim. It can be trapped in machines with zero cash available.
Insolvency: If assets fall below liabilities (e.g. assets 250, liabilities 300), equity drops to -50. Owners' cushion is gone.