P/E Ratio in an IPO

The price-to-earnings ratio an IPO is asking for, how it is calculated from restated pre-listing financials, why the peer comparison in the RHP is not neutral, and the stub-period trick that can make growth look better than it is.

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Published 19 September 2026 · IPO Sahayak

The price-to-earnings ratio is the one number every IPO valuation argument comes back to, and it appears in a specific section of every RHP — usually the least-read section relative to how much it actually tells you. This is how it's built for a company with no trading history, and the two places it most often misleads.

The formula, and what's different about an IPO's

P/E is price divided by earnings per share — unchanged from how it works for any listed stock. What's different is where each half comes from. For a listed company, the price is whatever the market is quoting right now, and the EPS is drawn from audited, publicly filed results the market has already digested. For an IPO, the price is the company's own proposed band, and the EPS comes from restated financials the company itself prepared for the RHP — figures the market is seeing for the first time, from a company being asked to set its own price.

Where it lives in the RHP

The Basis for Offer Price section — usually within the first fifty pages, covered in more depth in how to read an IPO RHP — states three years of the company's own EPS and return on net worth, then the P/E implied at the floor and the cap of the band. Next to it sits a table of named listed peers with the same figures for each. This is the company's own valuation argument, made in its own document, and it's worth reading as an argument rather than a fact.

The peer table isn't neutral

The company chooses which listed businesses count as its peers. There is no rule requiring the comparison set to be a fair one, and a company with room to pick can find peers that make its own multiple look reasonable by contrast — larger, more diversified, more established businesses that command a premium the smaller IPO candidate may not deserve on its own.

• Check how many peers are named. A table with one or two peers is a weaker comparison than one with five or six — fewer names means more room to have picked favourably.
• Check how close the businesses actually are — same product category, similar scale, similar geography. A specialist manufacturer compared against a large diversified conglomerate is not really being compared to anything.
• Check the spread across the peer set itself. If listed peers trade anywhere from 15x to 60x, “in line with peers” can mean almost any number the company wants it to.

The stub-period trick

Companies often file with financials for a period shorter than a full year — six or nine months to a date other than 31 March, timed to whatever is most recently available when the RHP is prepared. To state an annual EPS from that, the figure is annualised: multiplied up as if the same rate held for the full year.

This is a reasonable approximation for a business with steady, non-seasonal earnings. It is a distortion for one that isn't — a company whose strongest quarter fell inside the stub period will show an annualised EPS higher than a genuine full year would produce, and the resulting P/E looks cheaper than it should. The reverse happens if the weak quarter is the one being annualised.

Pre-money and post-money P/E

A fresh issue increases the number of shares outstanding, so EPS calculated on the post-issue share count is lower than EPS on the pre-issue count — the same earnings divided among more shares. RHPs typically show P/E on the post-issue basis, which is the more honest number for a prospective investor, since that is the share count you'll actually be holding. Watch for any comparison that quietly switches between the two, since a pre-issue P/E always looks cheaper than the post-issue figure for the same price and earnings.

What a lower P/E than peers actually tells you

Not automatically a bargain. It can mean the issue is priced to leave something on the table for applicants — genuinely common, since underpricing an IPO relative to its eventual trading range is a well-documented pattern globally. It can also mean the market would reasonably value this specific business below its peers: thinner margins, more customer concentration, weaker competitive position, less predictable revenue — details the P/E number itself says nothing about and the rest of the RHP does.

The number is a starting point for a question, not an answer on its own. Read it against the company's fresh issue versus offer-for-sale split — a business priced cheap while insiders sell out entirely is a different signal from one priced cheap while raising fresh growth capital — and against the risk factors the RHP itself discloses, not in isolation.

Common questions