What EPS means

EPS — earnings per share — takes PAT (profit after tax), the number we’ve used throughout the profitability posts, and slices it into one share’s worth: how much profit does the company earn for each individual share outstanding? It’s the building block the next post, P/E, is built directly on top of.

Desi Bites’ IPO from the last post makes this a genuinely useful example, because it raises a real distinction: pre-issue EPS uses the share count that actually existed while the profit was being earned (the pre-IPO count); post-issue EPS uses the full share count an investor buying at listing actually owns a claim on, including the freshly issued shares. For a company that just raised fresh capital, these two numbers can differ meaningfully — and the post-issue figure is the one a listing-day buyer should look at.

Don’t confuse this with the basic vs diluted EPS you’ll see in annual reports. Those are defined by the accounting standard (Ind AS 33):

  Divides PAT by
Basic EPS The weighted-average number of shares outstanding during the year
Diluted EPS That same weighted average, plus potential shares that could be created — employee stock options, warrants, convertible bonds

The weighted average matters in a year when shares are issued: shares that existed for only three months of the year count as a quarter of a share. So in the year Desi Bites actually lists, its reported basic EPS will divide that year’s profit by a share count somewhere between the pre-IPO and post-IPO counts, depending on when in the year the new shares arrived.

The formula

EPS = PAT / Shares Outstanding

Worked example: Desi Bites Foods Ltd, FY25

   
FY25 PAT (₹ Lakh) 209
÷ Pre-IPO shares (Lakh) 10
Pre-issue EPS ₹20.9
÷ Post-IPO shares (Lakh) 12.5
Post-issue EPS ₹16.72

Same ₹209 lakh of profit, two different EPS figures depending on which share count you divide by. An investor who bought shares at the IPO owns a claim on the post-issue figure — the 2.5 lakh new shares are real, outstanding shares from day one of trading, even though the FY25 profit was earned before they existed.

Worked example: Britannia Industries, FY25

From Britannia Industries’ audited consolidated FY25 results (year ended 31 March 2025, filed 8 May 2025). For illustration only.

   
EPS (basic and diluted) ₹90.45

Britannia’s basic and diluted EPS are the same number here because it has no material dilutive potential shares — no big pool of stock options or convertibles waiting to become new shares. Its share count also didn’t change during FY25, so there’s no pre-issue/post-issue gap of the kind Desi Bites’ IPO creates either.

🧒 Explain it like I'm 10 (optional — skip if this is already clear)

Imagine 10 friends win a pizza with 20 slices — 2 slices each. Now 2 more friends join the team just as the pizza arrives, and everyone agrees to share it 12 ways — about 1.7 slices each. The pizza (profit) didn’t get bigger; it just got cut into more shares. Post-issue EPS is what each person’s share is worth after the new friends joined.

Common mistakes

  • Using pre-issue EPS to value a stock right after a fresh issue. As shown above, it overstates what each share currently trading actually earns — post-issue EPS better reflects what a listing-day buyer is paying for in P/E (the price-to-earnings ratio, covered in the next post) and other valuation ratios.
  • Treating EPS growth as automatically good. EPS can rise because profit genuinely grew, or because a company bought back shares and shrank the denominator — the same EPS number, very different underlying story.
  • Comparing EPS across companies directly. EPS depends on how many shares a company happens to have outstanding, which is arbitrary — a ₹5 stock and a ₹5,000 stock can have wildly different EPS for reasons that have nothing to do with which business is better. EPS is only meaningful relative to price, which is exactly what P/E does next.
  • Ignoring one-off items baked into PAT. A one-time gain or exceptional charge flows straight through into EPS for that year — the same caveat already flagged back in the net margin post.

Takeaway: EPS slices profit into one share’s worth, and which share count you slice by matters a lot. On its own it’s a building block, not a valuation verdict.