Sustainable Growth Rate Calculator

What Is the Sustainable Growth Rate?

The sustainable growth rate (SGR) is the maximum rate at which a company can grow its revenue using only internally generated capital — without taking on additional debt or issuing new equity. It reflects how efficiently a business reinvests its earnings to fund expansion.

This metric is particularly useful for privately held companies and startups that rely on retained earnings rather than external financing. It helps answer a fundamental strategic question: How fast can we grow without changing our capital structure?

How the Sustainable Growth Rate Is Calculated

The SGR is derived from three financial inputs that capture a company's profitability, reinvestment behavior, and capital base:

• Net Income — Total profit after all expenses and taxes
• Dividends Paid — Amount distributed to shareholders
• Shareholders' Equity — Total equity capital contributed by owners and retained earnings

The calculation follows a two-step process:

1. Retention Ratio = (Net Income − Dividends) ÷ Net Income — This measures the proportion of earnings kept in the business rather than paid out
2. Return on Equity (ROE) = Net Income ÷ Shareholders' Equity — This measures how effectively the company generates profit from its equity base

Sustainable Growth Rate = Retention Ratio × ROE

The result is expressed as a percentage. A rate of 8%, for example, means the company can grow its revenue by up to 8% annually using only internally generated funds.

Interpreting the Result

The SGR provides a baseline growth ceiling under current financial policies. Here is how to interpret different outcomes:

• SGR above actual growth rate — The company is growing below its potential. It may be underinvesting or holding excess cash that could be deployed for expansion.
• SGR below actual growth rate — The company is growing faster than its internal capital supports. This typically requires external financing (debt or equity) and may increase financial risk over time.
• SGR near zero or negative — The company retains little or no earnings, or its return on equity is low. Growth will likely require external capital or operational improvements.

The SGR assumes the company maintains its current profit margin, asset turnover, dividend policy, and capital structure. Any change in these variables will shift the sustainable growth rate.

Practical Use Cases

• Financial planning — Set realistic revenue targets aligned with internal funding capacity
• Dividend policy decisions — Evaluate how changing dividend payouts affects growth potential
• Capital structure analysis — Determine whether growth ambitions require external financing
• Investor communication — Provide stakeholders with a clear, data-backed growth expectation
• Scenario modeling — Test how changes in profitability or retention affect long-term growth

Limitations to Consider

• The SGR is a static estimate based on a single period's financial data. It does not account for future changes in profitability, market conditions, or strategic shifts.
• It assumes the company can maintain its current asset efficiency and profit margins while growing — which may not hold in practice.
• Companies with negative equity or irregular earnings patterns may produce misleading SGR values.
• The model does not consider growth funded by operational efficiencies, price increases, or asset sales.

Use the SGR as a directional benchmark rather than a precise forecast. Combine it with cash flow analysis and strategic planning for a more complete growth assessment.