P/E Ratio — what is Price to Earnings ratio?

Definition

P/E ratio (Price to Earnings) is one of the most popular valuation metrics for publicly traded companies. It shows how much an investor pays for each zloty of company profit.

P/E = Share price ÷ Earnings per share (EPS)

Example

A share costs 100 PLN, earnings per share is 10 PLN: P/E = 100 ÷ 10 = 10

This means the investor pays 10 PLN for each 1 PLN of profit. In other words: at the current pace of earnings, the "return" on investment will occur in 10 years.

How to interpret P/E?

Note: P/E should be compared within the same industry. Technology companies naturally have higher P/E than energy companies.

Types of P/E

• Trailing P/E — based on earnings from the last 12 months (historical)
• Forward P/E — based on forecast earnings for the next 12 months

Forward P/E is more useful but based on forecasts that may not materialize.

P/E for indices

P/E can also be calculated for entire indices:

• S&P 500: historical average around 15–17
• WIG20: historically around 10–14
• NASDAQ: often 25–35 (tech dominance)

P/E limitations

• Doesn't work for unprofitable companies — negative profit = negative P/E, which makes no interpretive sense
• Doesn't consider debt — a company may have low P/E but be heavily indebted
• One-time events — net income may be distorted by one-time profit or loss
• Different accounting standards — make international comparisons difficult

For Polish investors, be especially careful when comparing P/E of companies listed on GPW with international peers due to different accounting standards and tax environments.

How Freenance can help?

Freenance shows fundamental indicators of companies in your portfolio, helping you assess whether your investments are valued high or low relative to the market.

👉 Analyze company valuations in your portfolio — freenance.io