What Is EPS? Understanding Earnings Per Share

The Number That Drives Everything

Earnings Per Share is the single metric that connects all of stock valuation together. When analysts calculate intrinsic value, they are projecting future EPS. When you look at a P/E ratio, the E is EPS. When Graham built his growth formula (V = EPS x (8.5 + 2g)), EPS was the anchor. The formula is simple:

It tells you how much profit the company generated for each share of stock. If a company earned $10 billion and has 1 billion shares outstanding, EPS is $10. If you own 100 shares, "your" portion of the company's profits was $1,000 that year.

The Problem with Accounting Earnings

Here is what Graham, Buffett, and Munger all understood: the EPS number on a financial statement is an accounting construction, not a direct measure of cash. Accountants follow rules (GAAP) that sometimes produce earnings figures that overstate or understate the true economic reality of a business.

Depreciation is the classic example. A company that bought a factory 10 years ago deducts depreciation expense every year, reducing reported earnings. But depreciation is a non-cash charge -- no money actually left the building. Meanwhile, a company that must constantly replace expensive equipment may report the same EPS as one that does not, even though the second business is far more valuable because it keeps more of what it earns.

Buffett's "Owner Earnings" -- The Better Measure

In his 1986 letter to Berkshire Hathaway shareholders, Buffett introduced a concept he called "owner earnings" to address exactly this problem:

The logic: start with reported earnings, add back non-cash depreciation charges, then subtract the capital expenditures the business actually needs to maintain its competitive position. What remains is the cash that truly belongs to the owner -- the money that could be extracted from the business without damaging it.

For asset-light businesses like software companies or brands like See's Candies (which Berkshire bought in 1972), owner earnings often exceed reported EPS because the business requires minimal reinvestment. For capital-intensive businesses like airlines or steel mills, owner earnings may be far lower than reported EPS because most of the depreciation add-back gets consumed by mandatory equipment replacement.

What to Look For in EPS

• Consistent growth over 5-10 years: A company that grows EPS steadily at 8-15% per year is building real value. Erratic EPS -- up 40% one year, down 20% the next -- makes valuation unreliable and increases the margin of safety you should demand.
• EPS growing alongside revenue: If EPS rises while revenue is flat or declining, the growth is coming from cost-cutting or share buybacks, not from genuine business expansion. That is sustainable only for so long.
• Positive and growing owner earnings: A company can report positive EPS while generating negative free cash flow if its capital expenditure needs are large enough. Always check whether the reported earnings translate to actual cash.

Basic vs Diluted EPS

Basic EPS divides net income by the current number of shares outstanding. Diluted EPS accounts for all potential shares that could be created through stock options, convertible bonds, restricted stock units, and other instruments.

Always use diluted EPS. It is the more conservative number and reflects the reality that many companies, especially in technology, compensate employees heavily with stock-based compensation. A company might report strong basic EPS while simultaneously diluting existing shareholders by issuing millions of new shares to employees each year. Diluted EPS captures this hidden cost.

The Buyback Manipulation

Companies can boost EPS without improving the underlying business by repurchasing their own stock. If a company earns $10 billion with 1 billion shares outstanding, EPS is $10. If it buys back 100 million shares, EPS rises to $11.11 -- an 11% "improvement" with zero improvement in actual profitability. Share buybacks can be excellent capital allocation when the stock trades below intrinsic value. They are wasteful or even destructive when done at inflated prices just to hit EPS targets. Always check whether revenue and total net income are growing alongside EPS to distinguish real growth from financial engineering.