A PE ratio is a price divided by earnings per share, and websites disagree because they choose different earnings. Some use the last four reported quarters (trailing), some use forecasts (forward), some use consolidated group profit and others standalone, and each updates on a different reporting date. The price is the same, so almost every difference comes from which earnings figure sits in the denominator.
Key takeaways
- The PE ratio is one number (price) divided by another (earnings per share), so any disagreement almost always comes from the earnings figure, not the price.
- Trailing PE uses the last four reported quarters; forward PE uses analyst forecasts, and the two can differ widely for a fast-changing company.
- Consolidated earnings include subsidiaries and joint ventures, while standalone earnings cover only the parent, so the same company has two valid EPS figures.
- One-off items, different share counts, and the exact date a site last refreshed its data all shift the ratio without anything changing at the company.
What actually goes into a PE ratio?
The P/E Ratio is simply the share price divided by the earnings per share. The price is a live, public number that every website reads from the same exchange feed, so two sites almost never disagree on price for more than a few seconds.
That leaves the denominator, the EPS, as the source of nearly every difference you see. Earnings per share is a company's profit divided by its number of shares, and there is no single "official" version of that figure at any given moment. A site chooses which profit to use, over which period, and adjusted in which way, and each of those choices moves the ratio.
Why does trailing PE differ from forward PE?
Trailing PE uses earnings the company has already reported, usually the sum of the last four quarters. It describes what has happened and is the same for everyone who adds up the same four quarters.
Forward PE uses an estimate of the next year's earnings, drawn from analyst forecasts. Because forecasts differ between analysts and change over time, forward PE varies from site to site and moves even when the price is flat.
For a company whose profit is growing or falling quickly, the two can look very far apart. A fast-growing company can show a high trailing PE and a much lower forward PE, because the market is paying today for earnings expected next year rather than the smaller earnings already booked. This is the same expectations-versus-results gap that drives Why prices fall on good results.
Open any stock on Artha Terminal to see its PE ratio alongside the earnings basis and underlying figures used to calculate it.
Why do consolidated and standalone earnings both exist?
Indian companies publish two sets of accounts. Standalone results cover only the parent company. Consolidated results add in the profits (or losses) of subsidiaries, associates, and joint ventures the parent controls or influences.
For a group such as a large conglomerate or a bank with several arms, consolidated and standalone profit can differ substantially, which means there are two legitimate EPS figures and therefore two legitimate PE ratios. One website may default to consolidated, another to standalone, and both can be technically correct while showing different numbers.
Neither is more "true" than the other. They answer different questions: standalone asks how the parent alone performed, and consolidated asks how the whole group performed.
How do reporting dates and one-off items shift the ratio?
A trailing PE is only as fresh as the last quarter a site has loaded. Around results season, one website may already include the newest quarter while another still shows the previous four, so their trailing PE ratios differ purely because of timing, not disagreement.
Earnings also contain one-off, or exceptional, items: a gain from selling a building, a write-off, a tax settlement, or a provision. Some providers strip these out to show "core" or adjusted earnings, while others leave the reported profit as it is. A single large exceptional item can swing EPS sharply, and whether a site adjusts for it changes the PE ratio meaningfully.
Why can the share count itself differ?
Earnings per share divides profit by the number of shares, and that share count is not always the same across sites. A company may have issued new shares, bought some back, or granted stock options that are counted in a "diluted" share count but not a "basic" one.
Providers that use basic shares and providers that use diluted shares will produce slightly different EPS, and therefore slightly different PE ratios, even from identical profit. The gap is usually small, but for companies with large option pools or recent equity issuance it is enough to notice.
On Artha Terminal, the stock page shows which earnings basis a ratio uses and lets you see the underlying figures rather than a single unexplained number, so a difference against another site becomes something you can trace rather than guess at. You can also ask the built-in assistant, Ask Warren, to explain why a specific ratio looks the way it does.