Costco P/E Ratio: Why the Market Pays a Premium for These Earnings

Divide a share price by a year's earnings per share and you get a number that looks like a verdict on value. For a warehouse retailer sitting in the mid-forties, the instinct is to call it expensive and move on. The instinct skips the interesting part, which is that not all earnings are built the same way, and a multiple is partly a judgement about construction.

Figures on MarketBeat's page for the stock, checked on 12 October 2026, put a P/E of 46.16 on trailing earnings and 43.9 on forward estimates, at a quoted price of $958.65, with a dividend yield of 0.61 per cent and a 52-week range of $844.06 to $1,096.50. Those figures move with the price every day, so take the live version from Yahoo Finance or Stockanalysis.com before you use one.

What the Ratio Divides, and What It Assumes

The calculation is price per share over earnings per share. Costco's results release for the 52 weeks to 30 August 2026 reports diluted earnings of $20.76 per share, up from $18.21 the year before. Any quoted price divided by that figure gives the trailing multiple.

Read literally, the result is the number of years of current earnings you are paying for. Read properly, it is a statement about three things at once: how fast those earnings are expected to grow, how reliable they are, and what return investors will accept for owning them. The first is a forecast. The second is a judgement about the business model. The third is about interest rates and risk appetite, and has nothing to do with the company at all.

Confusing those three is why the ratio misleads so often, a problem taken apart in the case against trusting a P/E on its own.

Where Roughly Half the Operating Profit Comes From

Here is the structural fact that explains the premium better than any growth forecast. The same results release reports membership fees of $5.907 billion for the fiscal year against operating income of $11.685 billion. Roughly half of the operating profit arrived as subscription revenue rather than as a margin on goods sold.

Look at the merchandise side and you see why that matters. The release shows net sales of $297.247 billion against merchandise costs of $264.279 billion, which leaves a thin gross margin by the standards of almost any other industry. The retail operation is close to a break-even machine for moving goods at low prices. The profit engine is the annual fee people pay for permission to shop there.

That arrangement produces earnings with a different character. Fee income is collected in advance, renews on a schedule, and does not depend on how much any individual member spends in a given quarter. Merchandise profit depends on footfall, mix, freight and petrol prices. Markets pay more for the first kind than the second, and they do so consistently across industries, not just here.

The balance sheet makes the timing visible. The same release lists deferred membership fees of $3.006 billion at the year end, against $2.854 billion a year earlier. That line is cash already received for access not yet used, sitting as a liability until the months it covers have passed. A business with a growing balance of money collected in advance has a different risk profile from one that has to earn every dollar at the till, and a multiple that ignores the distinction is doing less work than it appears to.

Trailing, Forward, and the Gap Between Them

Two multiples were quoted above, and the difference between them is a forecast rather than a fact. The trailing figure uses earnings already reported. The forward figure uses an estimate of next year's, so a forward multiple below the trailing one is simply analysts expecting earnings to rise.

One detail matters when using the trailing version here. The company's release notes that the fourth quarter was helped by 15 cents a share of non-recurring tariff refunds, partly offset by reinvesting those refunds in member value, and that the fourth quarter earned $6.75 a share. A denominator containing an item the company itself calls non-recurring will make the multiple look marginally lower than the underlying business justifies. Which version to use, and when, is covered in the difference between forward and trailing earnings multiples.

Comparing the Multiple With the Right Thing

A multiple is meaningless in isolation and nearly meaningless against the wrong comparison. Three comparisons are worth making, in this order.

• Against the company's own history. A multiple well above a business's long-run average is a different situation from one in line with it, even if the absolute figure looks high.

• Against businesses with similar earnings quality, rather than similar products. A subscription-heavy profit stream belongs next to other subscription businesses, which is the argument behind reading multiples by sector rather than against one market average.

• Against the market as a whole, over a long window. Robert Shiller publishes free monthly United States stock price, earnings and dividend data, along with the cyclically adjusted earnings multiple, running back to January 1871. It is the cheapest way to see whether the whole market is carrying a high multiple or just one company.

Skipping that third comparison is how people end up attributing a market-wide repricing to a single company's story.

Read the Renewal Rate Before You Read the Multiple

Most commentary on this company starts with the multiple and works backwards to a story that justifies it or condemns it. That ordering produces the same argument every quarter and settles nothing. The multiple is an output. Start with the input that produces it.

If half of operating profit is subscription income, then the number that decides whether the premium has any foundation is the proportion of members who renew. MarketBeat's coverage of the fiscal 2026 results listed a United States and Canada renewal rate of 92.3 per cent, paid members up 3.8 per cent to 84.1 million and executive members up 9.4 per cent to 42.3 million. A renewal rate in the low nineties is what makes fee income behave like a contract rather than a hope, and executive members growing faster than the overall base is the mix shifting toward the higher-fee tier.

So the discipline is to read those three figures first, each quarter, and only then look at what the market is charging for the earnings they produce. A premium multiple on a renewal rate that is drifting down is a very different proposition from the same multiple on a renewal rate holding steady, and the multiple alone cannot tell those two apart. Comparable sales is the companion check, which is why the way comparable sales is calculated at this retailer deserves reading before any valuation work.

This ordering stops holding in one case. Should membership income ever fall to a small share of operating profit, through fee changes or faster growth in merchandise margin, then renewal would stop being the controlling variable and the usual retail inputs would take over. Until the split in the release says otherwise, renewal is the number the premium rests on.

The Job the Ratio Leaves to You

A P/E reports what buyers will pay today for a dollar of last year's profit. Whether that price is sensible is not in the number, and the number cannot tell a dollar of fee income collected in advance from a dollar scraped off a pallet of paper towels. Working out which kind of dollar is on offer remains an exercise for the reader.

This article is for educational and informational purposes only. It is not financial advice, and Investor Muse is not a registered investment advisor. Historical figures describe the past and do not predict future results. Speak with a qualified professional before you make decisions about your money.

Position disclosure: neither Investor Muse nor its editorial team holds a position in any company, fund or security named in this article.