Sustainable Growth Rate Calculator: Growth Calculated Using ROE and Payout Ratio

Determine a company’s maximum growth rate without external financing by providing its Return on Equity (ROE) and Dividend Payout Ratio.

What is a Sustainable Growth Rate (SGR)?

The Sustainable Growth Rate (SGR) is a crucial financial metric that represents the maximum rate of growth a company can achieve without increasing its financial leverage (i.e., without borrowing more money or issuing new equity). The concept of growth calculated using ROE and payout ratio is fundamental to strategic planning, as it helps stakeholders understand how quickly a company can expand using only its own generated profits.

This growth rate is ‘sustainable’ because it’s financed internally. If a company grows faster than its SGR, it will be forced to seek external funding, such as taking on debt or selling more shares, which can increase risk and dilute existing shareholders’ ownership. Conversely, growing slower than the SGR might indicate missed opportunities or inefficient use of capital. Investors and managers use the SGR to assess the viability of long-term growth targets.

The Sustainable Growth Rate Formula and Explanation

The calculation is straightforward and relies on two key performance indicators: Return on Equity (ROE) and the Dividend Payout Ratio. The formula is:

SGR = ROE × (1 – Dividend Payout Ratio)

The second part of the formula, (1 – Dividend Payout Ratio), is also known as the Retention Rate. It represents the proportion of earnings that the company reinvests back into the business instead of paying out to shareholders. Therefore, the formula can be simplified to:

SGR = ROE × Retention Rate

This shows that a company’s ability to grow sustainably depends on both its profitability (ROE) and its policy on reinvesting profits (Retention Rate).

Description of variables used in the SGR formula.

Variable	Meaning	Unit	Typical Range
SGR	Sustainable Growth Rate	Percentage (%)	2% – 20%
ROE	Return on Equity	Percentage (%)	10% – 25%
Payout Ratio	Dividend Payout Ratio	Percentage (%)	0% – 100%
Retention Rate	Proportion of earnings reinvested	Percentage (%)	0% – 100%

Practical Examples

Example 1: A Stable, Mature Company

Imagine a well-established utility company, “Stable Power Inc.”

• Inputs:
  • Return on Equity (ROE): 12%
  • Dividend Payout Ratio: 60% (Mature companies often pay higher dividends)
• Calculation:
  1. Calculate Retention Rate: 1 – 0.60 = 0.40 (or 40%)
  2. Calculate SGR: 12% × 0.40 = 4.8%
• Result: Stable Power Inc. can grow its earnings and operations by 4.8% annually without needing to borrow money or issue new shares.

Example 2: A High-Growth Tech Company

Now consider a fast-growing technology firm, “Innovate Corp.” It’s in a growth phase and prefers to reinvest profits.

• Inputs:
  • Return on Equity (ROE): 25% (Highly profitable on its equity)
  • Dividend Payout Ratio: 10% (Reinvests most of its earnings)
• Calculation:
  1. Calculate Retention Rate: 1 – 0.10 = 0.90 (or 90%)
  2. Calculate SGR: 25% × 0.90 = 22.5%
• Result: Innovate Corp. has a very high sustainable growth rate of 22.5%, reflecting its high profitability and commitment to reinvestment. You can explore more scenarios with our dividend payout ratio calculator.

How to Use This Growth Rate Calculator

Using this calculator for growth calculated using ROE and payout ratio is simple. Follow these steps:

1. Enter Return on Equity (ROE): In the first input field, type the company’s ROE as a percentage. For instance, if the ROE is 18%, simply enter “18”. ROE measures how effectively a company generates profit from its shareholders’ equity.
2. Enter Dividend Payout Ratio: In the second field, provide the percentage of net income the company pays out as dividends. If the company pays out 30% of its earnings, enter “30”.
3. Review the Results: The calculator instantly updates. The primary result is the Sustainable Growth Rate (SGR). You can also see intermediate values like the Retention Rate, which is crucial for the calculation.
4. Interpret the Chart: The chart below the calculator visualizes how the SGR changes as ROE varies, providing a dynamic view of the relationship.

Key Factors That Affect Sustainable Growth

Several underlying business factors influence the growth calculated using ROE and payout ratio. These are best understood by breaking down ROE itself (often done using the DuPont analysis).

• Profit Margin: The higher the net profit margin, the more profit is generated from each dollar of sales. This increases ROE and, consequently, the SGR.
• Asset Turnover: This measures how efficiently a company uses its assets to generate sales. Higher asset turnover leads to a higher ROE and a higher SGR.
• Financial Leverage: Using debt can amplify returns on equity (and also risk). Higher leverage can increase ROE, thus increasing the SGR, assuming the returns generated exceed the cost of debt.
• Dividend Policy: This is the most direct lever. A lower dividend payout ratio means a higher retention rate, directly increasing the SGR as more capital is reinvested.
• Net Income: The absolute profitability of the firm. Higher net income directly translates to a higher ROE, assuming equity remains constant.
• Capital Structure: Changes in a company’s mix of debt and equity can affect ROE and influence the sustainable growth path. For a deeper analysis, see our tools related to {related_keywords}.

Frequently Asked Questions (FAQ)

1. What is considered a “good” Sustainable Growth Rate?

A “good” SGR is relative to the industry, company maturity, and economic conditions. A high-growth industry might see SGRs above 15-20%, while a mature industry might have SGRs in the 3-8% range. Generally, a rate that matches or slightly exceeds the long-term GDP growth rate is considered healthy.

2. Can the Sustainable Growth Rate be negative?

Yes. A negative SGR can occur if the Return on Equity (ROE) is negative, meaning the company is unprofitable and losing money. In this scenario, the company is shrinking its equity base through losses and cannot sustain any growth without external capital.

3. What’s the difference between SGR and the internal growth rate?

The Sustainable Growth Rate assumes the company maintains a stable capital structure (debt-to-equity ratio). The internal growth rate is more conservative; it calculates the maximum growth achievable with *no external financing of any kind*, including new debt. SGR allows for new debt to be issued to maintain the target capital structure.

4. Why is Return on Equity so important for this calculation?

ROE is the engine of growth in this model. It measures the profitability of the capital that shareholders have invested. Without a positive ROE, retained earnings would not generate value, and there would be no internally financed growth. A good ROE is often considered to be between 15% and 20%.

5. How does a company’s dividend policy affect its growth?

A company’s dividend policy directly impacts the retention rate. Paying out more earnings as dividends (a higher payout ratio) leaves less money for reinvestment, thus lowering the SGR. Conversely, retaining more earnings fuels higher potential growth. This is a classic trade-off between rewarding shareholders today (dividends) and investing for tomorrow (growth).

6. What happens if a company grows faster than its SGR?

If a company’s actual growth exceeds its SGR, it will face a “financing gap.” It must fund this extra growth by either taking on more debt (increasing financial risk) or issuing new shares (diluting existing shareholders). Maintaining growth above SGR for long periods is often unsustainable without strategic changes.

7. Does this calculation apply to companies that don’t pay dividends?

Yes, absolutely. For a company that pays no dividends, its Dividend Payout Ratio is 0%. In this case, its Retention Rate is 100% (1 – 0 = 1), and the formula simplifies to SGR = ROE. This means its sustainable growth rate is equal to its return on equity. Check out our related tools for more on this.

8. Are there any limitations to the SGR model?

Yes. The model assumes that ROE and the payout ratio remain constant, which may not be true in reality. It also doesn’t account for external factors like economic shifts or competitive pressures. It’s a planning tool, not a perfect forecast. For other financial metrics, you can use our Return on Equity (ROE) Calculator.