Could China Railway Signal & Communication Corporation Limited (HKG:3969) be an attractive dividend share to own for the long haul? Investors are often drawn to strong companies with the idea of reinvesting the dividends. Yet sometimes, investors buy a popular dividend stock because of its yield, and then lose money if the company's dividend doesn't live up to expectations.

China Railway Signal & Communication yields a solid 3.2%, although it has only been paying for three years. A 3.2% yield does look good. Could the short payment history hint at future dividend growth? When buying stocks for their dividends, you should always run through the checks below, to see if the dividend looks sustainable.

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Payout ratios

Dividends are typically paid from company earnings. If a company pays more in dividends than it earned, then the dividend might become unsustainable - hardly an ideal situation. As a result, we should always investigate whether a company can afford its dividend, measured as a percentage of a company's net income after tax. Looking at the data, we can see that 38% of China Railway Signal & Communication's profits were paid out as dividends in the last 12 months. This is a medium payout level that leaves enough capital in the business to fund opportunities that might arise, while also rewarding shareholders. Besides, if reinvestment opportunities dry up, the company has room to increase the dividend.

Another important check we do is to see if the free cash flow generated is sufficient to pay the dividend. Unfortunately, while China Railway Signal & Communication pays a dividend, it also reported negative free cash flow last year. While there may be a good reason for this, it's not ideal from a dividend perspective.

We update our data on China Railway Signal & Communication every 24 hours, so you can always get our latest analysis of its financial health, here.

Dividend Volatility

From the perspective of an income investor who wants to earn dividends for many years, there is not much point buying a stock if its dividend is regularly cut or is not reliable. The company has been paying a stable dividend for a few years now, but we'd like to see more evidence of consistency over a longer period. During the past three-year period, the first annual payment was CN¥0.025 in 2016, compared to CN¥0.15 last year. Dividends per share have grown at approximately 82% per year over this time.

We're not overly excited about the relatively short history of dividend payments, however the dividend is growing at a nice rate and we might take a closer look.

Dividend Growth Potential

The other half of the dividend investing equation is evaluating whether earnings per share (EPS) are growing. Growing EPS can help maintain or increase the purchasing power of the dividend over the long run. It's good to see China Railway Signal & Communication has been growing its earnings per share at 15% a year over the past 5 years. A company paying out less than a quarter of its earnings as dividends, and growing earnings at more than 10% per annum, looks to be right in the cusp of its growth phase. At the right price, we might be interested.

We'd also point out that China Railway Signal & Communication issued a meaningful number of new shares in the past year. Trying to grow the dividend when issuing new shares reminds us of the ancient Greek tale of Sisyphus - perpetually pushing a boulder uphill. Companies that consistently issue new shares are often suboptimal from a dividend perspective.

Conclusion

Dividend investors should always want to know if a) a company's dividends are affordable, b) if there is a track record of consistent payments, and c) if the dividend is capable of growing. First, we like China Railway Signal & Communication's low dividend payout ratio, although we're a bit concerned that it paid out a substantially higher percentage of its free cash flow. Second, the company has not been able to generate earnings growth, and its history of dividend payments too short for us to thoroughly evaluate the dividend's consistency across an economic cycle. While we're not hugely bearish on it, overall we think there are potentially better dividend stocks than China Railway Signal & Communication out there.

Earnings growth generally bodes well for the future value of company dividend payments. See if the 14 China Railway Signal & Communication analysts we track are forecasting continued growth with our free report on analyst estimates for the company.

Looking for more high-yielding dividend ideas? Try our curated list of dividend stocks with a yield above 3%.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.