Cintas Corporation's (NASDAQ:CTAS) price-to-earnings (or "P/E") ratio of 41x might make it look like a strong sell right now compared to the market in the United States, where around half of the companies have P/E ratios below 16x and even P/E's below 9x are quite common. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so lofty.

Recent times have been pleasing for Cintas as its earnings have risen in spite of the market's earnings going into reverse. The P/E is probably high because investors think the company will continue to navigate the broader market headwinds better than most. If not, then existing shareholders might be a little nervous about the viability of the share price.

See our latest analysis for Cintas

Does Growth Match The High P/E?

In order to justify its P/E ratio, Cintas would need to produce outstanding growth well in excess of the market.

If we review the last year of earnings growth, the company posted a worthy increase of 12%. The latest three year period has also seen an excellent 53% overall rise in EPS, aided somewhat by its short-term performance. So we can start by confirming that the company has done a great job of growing earnings over that time.

Shifting to the future, estimates from the analysts covering the company suggest earnings should grow by 9.3% each year over the next three years. That's shaping up to be materially lower than the 13% each year growth forecast for the broader market.

In light of this, it's alarming that Cintas' P/E sits above the majority of other companies. It seems most investors are hoping for a turnaround in the company's business prospects, but the analyst cohort is not so confident this will happen. There's a good chance these shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the growth outlook.

The Bottom Line On Cintas' P/E

It's argued the price-to-earnings ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

We've established that Cintas currently trades on a much higher than expected P/E since its forecast growth is lower than the wider market. When we see a weak earnings outlook with slower than market growth, we suspect the share price is at risk of declining, sending the high P/E lower. This places shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

Before you take the next step, you should know about the 1 warning sign for Cintas that we have uncovered.

If P/E ratios interest you, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.