CoStar GroupMIL:1CSGP 56 PS Ratio is 3.88 as of Jun. 29, 2026, which is 71% below its 10-year median of 13.17. GuruFocus rates MIL:1CSGP with a GF Score™ of 56/100 and a GF Value™ of €90.73 (Significantly Undervalued). The stock has 1 warning sign investors should review. Among 1,743 Real Estate companies, CoStar Group ranks worse than 61.85% on this metric.
The PS Ratio, or Price-to-Sales ratio, or Price/Sales, is a financial ratio used to compare a company's market price to its Revenue per Share. As of today, CoStar Group's share price is €26.90.
CoStar Group's Revenue per Share for the trailing twelve months (TTM) ended in Mar. 2026 was €6.94. Hence, CoStar Group's PS Ratio for today is 3.88.
Good Sign:
CoStar Group Inc stock PS Ratio (=3.75) is close to 10-year low of 3.73.
The historical rank and industry rank for CoStar Group's PS Ratio or its related term are showing as below:
MIL:1CSGP'
s PS Ratio Range Over the Past 10 Years
Min: 3.73 Med: 13.17 Max: 21.73
Current: 3.75
During the past 13 years, CoStar Group's highest PS Ratio was 21.73. The lowest was 3.73. And the median was 13.17.
MIL:1CSGP's PS Ratio is ranked worse than 61.85% of 1743
companies
in the Real Estate industry
Industry Median: 2.38
vs MIL:1CSGP: 3.75
During the past 12 months, the average Revenue per Share Growth Rate of CoStar Group was 17.30% per year.
During the past 3 years, the average Revenue per Share Growth Rate was 12.10% per year.
During the past 5 years, the average Revenue per Share Growth Rate was 11.80% per year.
During the past 10 years, the average Revenue per Share Growth Rate was 13.10% per year.
During the past 13 years, CoStar Group's highest 3-Year average Revenue per Share Growth Rate was 41.60% per year. The lowest was -0.50% per year. And the median was 13.75% per year.
Back to Basics: PS Ratio
CoStar Group (MIL:1CSGP) PS Ratio Explanation
The PS Ratio is an excellent valuation indicator if you want to compare a stock with its historical valuation or with the stocks in the same industry. The PS Ratio works especially well when you want to compare the stock's current valuation with its historical valuation. The PS Ratio is a great valuation tool for evaluating cyclical businesses where the PE Ratio works poorly. It works the best when comparing the current valuation with the historical valuation because over time, a company's profit margin tends to revert to the mean.
When the PS Ratio is applied to the whole stock market, it can be used to evaluate the current market valuation and projected returns. In this case, the price is the total market cap of all stocks that are traded, and sales are the GDP of the country. This is how Warren Buffett estimates the broad market valuation and project future returns.
The PS Ratio does not tell you how cheap or expensive the stock is. It cannot be used to compare companies in different industries. It works better for companies within the same industry because these companies tend to have similar capital structures and profit margins. It works the best when comparing a company with itself in the past.
CoStar Group PS Ratio Related Terms
CoStar Group PS Ratio Historical Data
* Premium members only.
The historical data trend for CoStar Group's PS 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.
For the Real Estate Services subindustry, CoStar Group's PS Ratio, along with its competitors' market caps and PS 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.
CoStar Group PS Ratio vs Real Estate Industry
For the Real Estate industry and Real Estate sector, CoStar Group's PS Ratio distribution charts can be found below:
* The bar in red indicates where CoStar Group's PS Ratio falls into.
The PS Ratio, or Price-to-Sales ratio, or Price/Sales, is a financial ratio used to compare a company's market price to its Revenue per Share. It is a ratio widely used to value stocks and it was first used by Ken Fisher.
CoStar Group's PS Ratio for today is calculated as
CoStar Group's Share Price of today is €26.90. CoStar Group's Revenue per Share for the trailing twelve months (TTM) ended in Mar. 2026 adds up the quarterly data reported by the company within the most recent 12 months, which was €6.94.
* 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.
It can also be calculated from the numbers for the whole company:
CoStar Group (MIL:1CSGP) has a PS Ratio of 3.88 as of Jun. 29, 2026. Price-to-Sales ratio is the ratio of share price to a company's revenue per share. View historical data on CoStar Group and its competitors. This is 71% below median its historical median of 13.17. Over the past decade, CoStar Group's PS Ratio has ranged from 3.73 to 21.73. According to the industry distribution chart, CoStar Group ranks #1078 out of 1743 companies in the Real Estate industry, placing it in the top 61.8%.
Is CoStar Group's PS Ratio too high?
CoStar Group's current PS Ratio of 3.88 is 71% below median its 10-year median of 13.17. Over the past 10 years, this metric has ranged from a low of 3.73 to a high of 21.73. The Real Estate industry median PS Ratio is 2.38. CoStar Group's value of 3.88 is 63% above this industry median. Based on the distribution chart, CoStar Group ranks #1078 out of 1743 companies in the Real Estate industry, which is below the industry midpoint. Overall, CoStar Group has a GF Score™ of 56/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does CoStar Group's PS Ratio compare to JLL and BEKE?
According to the Real Estate industry distribution chart, CoStar Group ranks #1078 out of 1743 companies for PS Ratio. This places CoStar Group in the lower half of its industry. The industry median PS Ratio is 2.38. CoStar Group's value of 3.88 is 63% above this benchmark. Historically, CoStar Group's own PS Ratio has ranged from 3.73 to 21.73 over the past decade. While the company's 10-year median is 13.17 vs. the industry median of 2.38, CoStar Group 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 PS Ratio for a Real Estate company?
The median PS Ratio among Real Estate companies is 2.38, based on 1,743 companies in the industry. Companies in the top quartile (top 25%) have a PS Ratio significantly above this median, while those in the bottom quartile fall well below. However, PS Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. CoStar Group's current PS Ratio of 3.88 is 63% 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 PS Ratio mean?
A high PS Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Sales ratio is the ratio of share price to a company's revenue per share. View historical data on CoStar Group and its competitors. For the Real Estate industry, the median PS Ratio is 2.38 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. CoStar Group's current PS Ratio is 3.88, which is 71% below median its own 10-year median of 13.17. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is CoStar Group stock overvalued right now?
Based on GuruFocus' analysis, CoStar Group (MIL:1CSGP) is currently considered Significantly Undervalued. The stock's GF Value™ is €90.73, compared to a current price of €26.90 — trading 70.4% below its estimated fair value. The current PS Ratio is 3.88, which is 71% below median its 10-year median of 13.17 and 63% above the Real Estate industry median of 2.38. CoStar Group's overall GF Score™ is 56/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PS Ratio calculated?
PS Ratio is calculated from a company's financial statements. For CoStar Group (MIL:1CSGP), the current PS Ratio is 3.88 as of Jun. 29, 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 CoStar Group (MIL:1CSGP) Overvalued in 2026?
Based on GuruFocus' analysis, CoStar Group stock appears to be undervalued.
The current stock price of €26.90 is trading 70.4% below its estimated GF Value™ of €90.73.
GuruFocus considers CoStar Group to be Significantly Undervalued.
Key valuation signals for MIL:1CSGP:
PS Ratio: 3.88 (71% below median its 10-year median of 13.17)
GF Value™: €90.73 vs. price of €26.90 (70.4% below fair value)
Industry Position: 63% above the Real Estate median (#1078 of 1743)
No single metric tells the full story. See the MIL:1CSGP stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage. It primarily sells high-margin software-as-a-service subscriptions that provide institutional clients with forensic property data and premium advertising visibility. With operations across North America, Europe, and Asia-Pacific, CoStar maintains the industry's most comprehensive centralized real estate database, functioning as a critical information utility for brokers, lenders, and owners worldwide.
56GF Score
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