Model the maximum organic growth achievable without external debt or equity financing, and calculate External Financing Needed (EFN).
| Growth & Capital Metric | Value | Formula / Managerial Interpretation |
|---|---|---|
| Return on Assets (ROA) | 18.00% | Net Income ÷ Total Assets |
| Return on Equity (ROE) | 18.00% | Net Income ÷ Stockholders' Equity |
| Plowback Retention Rate (b) | 100.0% (Payout: 0.0%) | 1 - Dividend Payout Ratio |
| Internal Growth Rate (IGR) | 21.95% | (ROA × b) ÷ (1 - (ROA × b)) (Zero Debt Speed Limit) |
| Sustainable Growth Rate (SGR) | 21.95% | (ROE × b) ÷ (1 - (ROE × b)) (Constant Debt/Equity) |
| Target Growth Spread (g - IGR) | -6.95% (Self-Funded) | Surplus retention capacity above planned growth |
| Projected Addition to Retained Earnings | $103.50M | Projected Net Income × Plowback Rate (b) |
| Required Capital Asset Expansion | $75.00M | Total Assets × Target Growth Rate |
| External Financing Needed (EFN) | -$28.50M | Required Assets - Reinvested Profits (Surplus) |
Examine how shifts in operating profitability (ROA) and dividend distribution policy (Retention Rate b) alter the Internal Growth Rate (IGR %).
1. What is the fundamental assumption of the Internal Growth Rate (IGR)?
2. Why is Higgins Sustainable Growth Rate (SGR) higher than Internal Growth Rate (IGR)?
3. What does a positive External Financing Needed (EFN > 0) indicate?
4. Which managerial action directly expands a firm's Internal Growth Rate without altering its dividend payout?
The Internal Growth Rate (IGR) is the maximum annual percentage rate at which a company can expand sales and balance sheet assets without issuing any external financing—neither new debt nor new equity: IGR = (ROA × b) ÷ (1 - (ROA × b)), where ROA is Return on Assets (Net Income ÷ Total Assets) and b is the retention (plowback) rate (1 - Dividend Payout Ratio).
The key distinction is debt financing. IGR assumes zero external debt borrowing, meaning assets expand strictly by retained earnings. SGR (Higgins Sustainable Growth Rate) assumes the company issues debt at a constant debt-to-equity ratio, allowing assets to expand by both retained earnings and proportional debt borrowing (SGR = (ROE × b) ÷ (1 - (ROE × b))). Consequently, SGR is always greater than or equal to IGR.
External Financing Needed (EFN) measures the funding shortfall when a firm's target growth rate exceeds its self-financed capacity: EFN = Required Asset Expansion - Projected Additions to Retained Earnings. When actual growth exceeds IGR, operating cash retention cannot cover the working capital and equipment required, creating an EFN deficit that must be funded via bank debt, bonds, or equity dilution.
Bootstrapped founders and private operators often have zero access to corporate bond markets or choose not to dilute equity ownership. For these businesses, IGR defines the absolute speed limit of sustainable organic expansion. Attempting to grow faster than IGR without external financing leads directly to cash depletion, inventory stockouts, and insolvency.
Because IGR is driven by ROA and retention, management can raise IGR by: (1) increasing net profit margins through pricing power or cost discipline, (2) accelerating total asset turnover (reducing working capital, shortening DSO, increasing inventory turns), or (3) reducing dividend distributions to increase the plowback retention rate (b).
Overtrading occurs when a business expands revenues at a rate far exceeding its financial capacity (Projected Growth >> SGR > IGR). Because receivables and inventory grow with sales before cash receipts arrive, cash is rapidly exhausted, leading to severe liquidity crises despite reporting high accounting profits.