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Costco WholesaleCOST -2.24%96 Shiller PE Ratio is 67.19 as of Aug. 27, 2026, which is 19% above its 10-year median of 56.29. GuruFocus rates COST with a GF Score™ of 96/100 and a GF Value™ of $1,035.84 (Modestly Undervalued). The stock has 1 warning sign investors should review. Among 193 Retail - Defensive companies, Costco Wholesale ranks worse than 93.78% on this metric.
As of today (2026-08-27), Costco Wholesale's current share price is $934.66. Costco Wholesale's E10 for the quarter that ended in May. 2026 was $13.91. Costco Wholesale's Shiller PE Ratio for today is 67.19.
The historical rank and industry rank for Costco Wholesale's Shiller PE Ratio or its related term are showing as below:
COST'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 35.07 Med: 56.29 Max: 94.02
Current: 67.19
During the past years, Costco Wholesale's highest Shiller PE Ratio was 94.02. The lowest was 35.07. And the median was 56.29.
COST's Shiller PE Ratio is ranked worse than 93.78% of 193
companies
in the Retail - Defensive industry
Industry Median: 18.02
vs COST: 67.19
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Costco Wholesale's adjusted earnings per share data for the three months ended in May. 2026 was $4.930. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $13.91 for the trailing ten years ended in May. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Costco Wholesale (NAS:COST) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Costco Wholesale Shiller PE Ratio Related Terms
Costco Wholesale Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Costco Wholesale's Shiller PE Ratio can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
COST vs TGT, DG, DLTR: Shiller PE Ratio Comparison
For the Discount Stores subindustry, Costco Wholesale's Shiller PE Ratio, along with its competitors' market caps and Shiller PE Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Costco Wholesale Shiller PE Ratio vs Retail - Defensive Industry
For the Retail - Defensive industry and Consumer Defensive sector, Costco Wholesale's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Costco Wholesale's Shiller PE Ratio falls into.
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Costco Wholesale's E10 for the quarter that ended in May. 2026 is calculated as:
For example, Costco Wholesale's adjusted earnings per share data for the three months ended in May. 2026 was:
Add all the adjusted EPS together and divide 10 will get our E10.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
Costco Wholesale (COST) has a Shiller PE Ratio of 67.19 as of Aug. 27, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Costco Wholesale and its competitors. This is 19% above median its historical median of 56.29. Over the past decade, Costco Wholesale's Shiller PE Ratio has ranged from 35.07 to 94.02. According to the industry distribution chart, Costco Wholesale ranks #181 out of 193 companies in the Retail - Defensive industry, placing it in the top 93.8%.
Is Costco Wholesale's Shiller PE Ratio too high?
Costco Wholesale's current Shiller PE Ratio of 67.19 is 19% above median its 10-year median of 56.29. Over the past 10 years, this metric has ranged from a low of 35.07 to a high of 94.02. The Retail - Defensive industry median Shiller PE Ratio is 18.02. Costco Wholesale's value of 67.19 is 272.9% above this industry median. Based on the distribution chart, Costco Wholesale ranks #181 out of 193 companies in the Retail - Defensive industry, which is in the bottom quartile relative to peers. Overall, Costco Wholesale has a GF Score™ of 96/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Costco Wholesale's Shiller PE Ratio compare to TGT and DG?
According to the Retail - Defensive industry distribution chart, Costco Wholesale ranks #181 out of 193 companies for Shiller PE Ratio. This places Costco Wholesale in the lower half of its industry. The industry median Shiller PE Ratio is 18.02. Costco Wholesale's value of 67.19 is 272.9% above this benchmark. Historically, Costco Wholesale's own Shiller PE Ratio has ranged from 35.07 to 94.02 over the past decade. While the company's 10-year median is 56.29 vs. the industry median of 18.02, Costco Wholesale has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Shiller PE Ratio for a Retail - Defensive company?
The median Shiller PE Ratio among Retail - Defensive companies is 18.02, based on 193 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Costco Wholesale's current Shiller PE Ratio of 67.19 is 272.9% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Costco Wholesale and its competitors. For the Retail - Defensive industry, the median Shiller PE Ratio is 18.02 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Costco Wholesale's current Shiller PE Ratio is 67.19, which is 19% above median its own 10-year median of 56.29. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Costco Wholesale stock overvalued right now?
Based on GuruFocus' analysis, Costco Wholesale (COST) is currently considered Modestly Undervalued. The stock's GF Value™ is $1,035.84, compared to a current price of $934.66 — trading 9.8% below its estimated fair value. The current Shiller PE Ratio is 67.19, which is 19% above median its 10-year median of 56.29 and 272.9% above the Retail - Defensive industry median of 18.02. Costco Wholesale's overall GF Score™ is 96/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Costco Wholesale (COST), the current Shiller PE Ratio is 67.19 as of Aug. 27, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Costco Wholesale (COST) Overvalued in 2026?
Based on GuruFocus' analysis, Costco Wholesale stock appears to be undervalued.
The current stock price of $934.66 is trading 9.8% below its estimated GF Value™ of $1,035.84.
GuruFocus considers Costco Wholesale to be Modestly Undervalued.
Key valuation signals for COST:
Shiller PE Ratio: 67.19 (19% above median its 10-year median of 56.29)
GF Value™: $1,035.84 vs. price of $934.66 (9.8% below fair value)
Industry Position: 272.9% above the Retail - Defensive median (#181 of 193)
No single metric tells the full story. See the COST stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Founded in 1983, Costco Wholesale now operates a global chain of membership-based warehouse clubs, delivering high-quality goods and services at consistently low prices. As of its most recent fiscal year, Costco operated approximately 910 warehouses, serving more than 80 million members across its three geographic segments: Costco US (approximately 73% of total revenue), Costco Canada (13%), and Costco International (14%).Costco's core value proposition—quality products at unbeatable prices—has yielded consistently strong member renewal rates (93% in the US and Canada and nearly 90% internationally). About 55% of Costco's fiscal 2025 revenue came from its grocery offerings, and another 25% from general merchandise.
96GF Score
Get the complete analysis for COST
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