Determining Realistic Company Growth Rates

When valuing a company, predicting future growth is crucial but challenging. The growth rate you use will dramatically impact your valuation calculations.

"The investor of today does not profit from yesterday's growth." - Warren Buffett

Consider this: Two identical companies both earning $10 million this year will be worth very different amounts if one grows at 15% annually while the other grows at only 5%. After 10 years, the first company would earn $40.5 million, while the second would earn just $16.3 million.

Here are the main methods for estimating realistic growth rates:

1. Analyst Estimates

Wall Street analysts study companies and provide growth projections that are easily accessible.

Example: On Yahoo Finance, you might find that analysts expect Apple (AAPL) to grow earnings at 12.24% annually for the next 5 years.

Warning: Research by McKinsey found analyst forecasts are typically 100% too high. A predicted 10% growth rate might realistically be closer to 5%.

2. Historical EPS Growth

Examining past performance can provide context but cannot simply be extrapolated forward.

Example: Google (GOOGL) grew from $0.73 EPS in 2004 to $19.37 EPS later, an impressive 38.8% annual growth rate. However, expecting this rate to continue would mean Google would need to earn 26 times more in ten years—highly unrealistic due to the Law of Large Numbers.

3. Return on Equity (ROE)

In theory, if a company reinvests all earnings, its growth rate equals its ROE.

ROE = Net Income / Shareholders' Equity

Example: If Toothpick Inc. invests $20 million and generates $5 million in net income, its ROE is 25%. If all earnings are reinvested, the company could theoretically grow by 25% annually.

However, this oversimplifies real-world conditions since some earnings go to dividends and maintenance.

4. Sustainable Growth Rate

This formula accounts for dividends paid out to shareholders:

Sustainable Growth Rate = ROE × (1 - dividend payout ratio)

Example: If Toothpick Inc. has a 25% ROE but pays out 40% of earnings as dividends, its Sustainable Growth Rate would be 15% (25% × 60%).

5. Sustainable Growth Rate+ (Most Comprehensive)

This refined approach accounts for debt and maintenance costs:

(Net Income - Dividends - Depreciation & Amortization) / (Shareholders' Equity + Long-Term Debt)

Example: If a company has:

Net Income: $10 million
Dividends: $2 million
Depreciation & Amortization: $1.5 million
Shareholders' Equity: $50 million
Long-Term Debt: $20 million

Its Sustainable Growth Rate+ would be: ($10M - $2M - $1.5M) / ($50M + $20M) = $6.5M / $70M = 9.29%

Best Practices

Compare multiple estimation methods rather than relying on a single approach
Be conservative in your projections—lower estimates are safer than optimistic ones
Examine earnings consistency over the past decade—steady earnings provide more confidence
Apply a margin of safety to your calculations
Check if the growth rate has been stable or volatile in recent years

The key takeaway is that determining growth rates requires multiple approaches and conservative judgment, especially for companies with inconsistent earnings. As Warren Buffett noted, "In the business world, the rearview mirror is always clearer than the windshield."