EPS (earnings per share, or BPA in Spanish) is a company's profit divided by its number of shares. It answers a simple question: of everything the company earns, how much belongs to each share?
How it's calculated
EPS is found by dividing net income by the number of shares outstanding:
- EPS = Net income ÷ Number of shares
If a company earns $1 billion and has 500 million shares, its EPS is $2 per share. It's profit "seen from a shareholder's perspective": not what the whole company earns, but what belongs to each share you hold.
What it's for: it's the basis of the P/E
EPS on its own says little. Its real use appears when you compare it with the share price: that ratio is the P/E (price ÷ EPS), the most-used multiple to judge whether a stock is cheap or expensive. If a stock costs $40 and its EPS is $2, its P/E is 20: you're paying twenty years of current profit. Without EPS, there's no P/E.
On top of that, the evolution of EPS over time is one of the best signs of a good business: a company whose earnings per share grow year after year is creating value for its owners.
The catch: watch out for splits and buybacks
Here's the most common trap. EPS depends on the number of shares, and that number can change without the business getting better or worse:
- Splits: if a company divides each share into ten, EPS drops to a tenth overnight. It's not earning less: it simply spreads the same profit across ten times more shares. Comparing EPS before and after a split without adjusting gives absurd readings (a false collapse).
- Buybacks: when a company buys back and retires its own shares, profit is split across fewer of them and EPS rises, even if total profit is unchanged. It's a legitimate way to reward shareholders, but it inflates EPS growth.
A real case: Netflix did a ten-for-one split in 2025. Its EPS "fell" from about $12 to about $2.5, yet its total profit kept growing. That's why, at StockSemáforo, to measure growth we use total profit (immune to splits) when it diverges sharply from per-share EPS: this way a split isn't mistaken for a drop in earnings.
How to use it well
Don't look at EPS in isolation or for a single year: check whether it grows steadily, discount the effect of splits and buybacks, and always use it alongside price (the P/E) to judge valuation. To see the EPS, its growth and the P/E of any stock at a glance, type its ticker into the analyzer, or first review the fundamental analysis guide.