Sustainable Growth Rate (SGR) Calculator
Calculate a company’s growth rate using its Return on Equity and Retained Earnings.
What is Sustainable Growth Rate (SGR)?
The Sustainable Growth Rate (SGR) is a financial metric that measures the maximum rate of growth a company can sustain without raising external equity or increasing its financial leverage (debt). In simpler terms, it tells you how fast a company can grow using only its own internally generated funds—specifically, the profits it retains and reinvests back into the business. To calculate the growth rate using return on equity and retained earnings is to determine this very figure.
This metric is crucial for investors, financial analysts, and business owners. It provides a realistic benchmark for growth expectations. If a company tries to grow faster than its SGR, it will need to find additional funding, either by issuing more stock (diluting ownership) or taking on more debt (increasing risk). Conversely, if a company grows slower than its SGR, it may be a sign of missed opportunities or inefficient use of capital.
Sustainable Growth Rate Formula and Explanation
The formula to calculate the growth rate using return on equity and retained earnings is elegantly simple, combining profitability and reinvestment policy into a single powerful figure.
The formula is: SGR = Return on Equity (ROE) × Retention Rate
This shows that a company’s ability to grow is driven by two key factors: how profitably it uses its shareholders’ equity and how much of those profits it plows back into the business.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Return on Equity (ROE) | Measures how efficiently a company generates profit from the money shareholders have invested. | Percentage (%) | 5% – 25% (varies by industry) |
| Retention Rate (b) | The proportion of net income kept by the company for reinvestment, calculated as (1 – Dividend Payout Ratio). | Percentage (%) | 20% – 100% |
| Sustainable Growth Rate (SGR) | The maximum growth rate achievable without external financing. | Percentage (%) | 2% – 20% |
Practical Examples
Example 1: Established Tech Company
A mature technology firm has a stable market position and decides to balance growth and shareholder returns.
- Input (ROE): 20% (The company is highly profitable and efficient).
- Input (Retention Rate): 40% (It pays out 60% of its earnings as dividends and retains the rest).
- Calculation: SGR = 20% * 40% = 8.0%
Result: The company can sustainably grow its sales and earnings by 8.0% per year without needing to borrow money or issue new shares. This is a healthy growth rate for a stable company. For more on company growth potential, see our business valuation models.
Example 2: High-Growth Startup
A newer company in a fast-growing industry is focused on expansion and reinvests all its profits.
- Input (ROE): 15% (It’s profitable, but still scaling and not as efficient as a mature leader).
- Input (Retention Rate): 100% (The company pays no dividends, reinvesting every dollar of profit).
- Calculation: SGR = 15% * 100% = 15.0%
Result: This startup can support a 15.0% annual growth rate. If it wants to grow even faster (e.g., 30%), it must seek external capital from venture capitalists or lenders.
How to Use This Sustainable Growth Rate Calculator
This calculator helps you quickly determine a company’s SGR. Follow these simple steps:
- Enter Return on Equity (ROE): Find the company’s ROE from its latest financial statements. Enter this value as a percentage. For instance, an ROE of 0.18 should be entered as 18. To better understand this metric, you can use a return on equity calculator.
- Enter Retention Rate: Determine the company’s retention rate. This is calculated as `(Net Income – Dividends) / Net Income` or simply `1 – Dividend Payout Ratio`. If a company pays no dividends, its retention rate is 100%.
- Calculate: Click the “Calculate Growth Rate” button.
- Interpret the Results: The primary result is the SGR. The calculator also shows the intermediate values used in the calculation, providing transparency. The dynamic chart helps you visualize how changes in ROE or retention rate would impact the growth potential.
Key Factors That Affect Sustainable Growth Rate
Several underlying financial levers influence a company’s SGR. Understanding these helps in strategic decision-making.
- Profit Margin
- A higher net profit margin increases net income, which boosts ROE and thus the SGR, assuming all else is equal. Operational efficiency is key.
- Asset Turnover
- This measures how efficiently a company uses its assets to generate sales. Higher turnover leads to a higher ROE, which increases the SGR.
- Financial Leverage
- Using debt (leverage) can amplify ROE. However, too much debt increases financial risk and can become unsustainable. Finding the right capital structure is critical. You can explore this with our WACC calculator.
- Dividend Policy
- This directly impacts the retention rate. A lower dividend payout means a higher retention rate, channeling more funds into growth and increasing the SGR. A dividend payout ratio calculator can clarify this relationship.
- Reinvestment Opportunities
- A high SGR is only valuable if the company has profitable projects to reinvest in. Without good opportunities, retaining earnings is less effective.
- Economic Conditions
- Broader economic trends can affect a company’s profitability and growth opportunities, indirectly influencing its SGR.
Frequently Asked Questions (FAQ)
1. What is the difference between sustainable growth rate and actual growth rate?
The SGR is a theoretical maximum growth rate without external financing, while the actual growth rate is what the company actually achieved. If actual growth > SGR, the company likely took on debt or issued equity. If actual growth < SGR, it may have excess cash or be underutilizing its capital.
2. Can a company have a negative SGR?
Yes. A negative SGR occurs if the Return on Equity (ROE) is negative, meaning the company is unprofitable. In this scenario, the company is destroying value, and any retention of “earnings” (which are actually losses) would lead to further contraction.
3. Why is it called “sustainable”?
It’s “sustainable” because it represents a pace of growth that can be maintained indefinitely without altering the company’s financial structure (debt-to-equity ratio) or requiring new outside investment.
4. How is the retention rate calculated?
The retention rate is the percentage of net income not paid out as dividends. The formula is `1 – (Dividends / Net Income)`. For example, if a company earned $10 million and paid $3 million in dividends, its dividend payout ratio is 30%, and its retention rate is 70%.
5. Is a higher SGR always better?
Not necessarily. A very high SGR might indicate high risk, for example, if it’s driven by high financial leverage. It’s also only beneficial if the company can find profitable ways to reinvest the retained earnings. A balanced growth rate is often more desirable for long-term stability. For more context, you can read about financial statement analysis.
6. What are the limitations of the SGR formula?
The model assumes that the key ratios (profit margin, asset turnover, leverage, and payout ratio) remain constant, which is rarely the case in the real world. It is a planning tool, not a precise forecast.
7. How does ROE affect the growth rate?
ROE is a direct multiplier in the SGR formula. A higher ROE means the company is more effective at generating profits from its equity base. This provides more fuel for reinvestment, leading to a higher potential growth rate.
8. What if a company doesn’t pay dividends?
If a company pays no dividends, its dividend payout ratio is 0%, and therefore its retention rate is 100%. In this case, the SGR is equal to its ROE. This is common for growth-stage companies.