Free Sustainable Growth Rate Calculator

What Is the Sustainable Growth Rate?

Sustainable growth rate (SGR) is the maximum pace a company can expand using only its internally generated profits, without needing to issue new equity or take on additional debt. This free online SGR calculator applies the sustainable growth rate formula, which combines the retention ratio (the fraction of net income kept rather than paid as dividends) with the return on equity (ROE). The result helps investors and analysts gauge how much organic growth a firm can support. Because SGR is a key input in valuation models such as the dividend discount model (DDM) and discounted cash flow (DCF) analysis, understanding how to compute and interpret it is essential.

How to Calculate SGR: A Step-by-Step Example

Consider Company Alpha, with the following financial details:

Financial Item	Value
Net Income	$2,000,000
Dividends Paid	$1,000,000
Shareholders' Equity	$10,000,000

1. Retention Ratio

The retention ratio measures the share of earnings a company keeps after distributing dividends. It is given by:

$$\text{Retention Ratio} = 1 - \frac{\text{Dividends Paid}}{\text{Net Income}}$$

For Company Alpha:

$$1 - \frac{1{,}000{,}000}{2{,}000{,}000} = 1 - 0.5 = 0.5 = 50\%$$

2. Return on Equity (ROE)

ROE indicates how efficiently a company uses its equity base to produce profit:

$$\text{ROE} = \frac{\text{Net Income}}{\text{Shareholders' Equity}}$$

Applying the data:

$$\frac{2{,}000{,}000}{10{,}000{,}000} = 0.2 = 20\%$$

3. Sustainable Growth Rate

The SGR is simply the product of the two components:

$$\text{SGR} = \text{Retention Ratio} \times \text{ROE} = 50\% \times 20\% = 10\%$$

This means Company Alpha can grow at a maximum internal rate of 10 % per year without seeking external financing. The calculator handles all three steps instantly for any set of input numbers.

Interpreting the Sustainable Growth Rate

While SGR is a straightforward metric, two points are worth noting:

• Sustainability and investment. Maintaining a high SGR is challenging because growth often requires heavy spending—on research, capacity, or marketing—which can reduce net income and ROE. Economic downturns also limit internal capital generation.
• Financial leverage risk. Some companies increase debt purely to raise their ROE, thereby inflating their SGR. When leverage, rather than operational strength, drives the rate, the growth is not truly sustainable and may signal greater risk.
• Benchmarking against the economy. A common practice is to compare a company's SGR with the GDP growth rate of its home country. An SGR above GDP indicates the firm is outperforming the broader economy, while a lower figure suggests constrained internal growth.

This tool therefore serves not only as a maximum growth rate calculator but also as a diagnostic aid for evaluating the quality of a company's expansion prospects.