## Retained Earnings
### Definition
The portion of profits not distributed as dividends but reinvested (ploughed back) into the business. An internal, long-term source of finance.
### Key Characteristics
| Characteristic | Explanation |
|---|---|
| Belongs to shareholders | Adds to net worth; increases shareholders' equity without issuing fresh shares |
| No dilution of control | No new shares issued → existing control remains intact |
| Cost-effective | No flotation cost, no interest obligation, no external risk |
| Used for expansion | Capital expenditure, diversification, modernisation |
| Legally required | Public companies must retain a reasonable portion annually |
| Opportunity cost applies | Retention is justified only if reinvested return > cost of equity capital |
### The Opportunity Cost Concept
Retained earnings are not free — shareholders forego dividends when earnings are retained. The cost of retained earnings ≈ the return shareholders could earn elsewhere (opportunity cost). If the company cannot earn more than this benchmark, it should distribute rather than retain.
### Advantages
- No external dependency
- No dilution (ownership or EPS)
- Flexible — management decides how much to retain
- Strengthens balance sheet