Phillips 66 (NYSE:PSX) stock is about to trade ex-dividend in 4 days. Typically, the ex-dividend date is one business day before the record date, which is the date on which a company determines the shareholders eligible to receive a dividend. It is important to be aware of the ex-dividend date because any trade on the stock needs to have been settled on or before the record date. In other words, investors can purchase Phillips 66's shares before the 18th of August in order to be eligible for the dividend, which will be paid on the 1st of September.

The company's next dividend payment will be US$1.27 per share. Last year, in total, the company distributed US$5.08 to shareholders. Based on the last year's worth of payments, Phillips 66 stock has a trailing yield of around 2.3% on the current share price of US$225.58. We love seeing companies pay a dividend, but it's also important to be sure that laying the golden eggs isn't going to kill our golden goose! That's why we should always check whether the dividend payments appear sustainable, and if the company is growing.

Dividends are typically paid from company earnings. If a company pays more in dividends than it earned in profit, then the dividend could be unsustainable. Fortunately Phillips 66's payout ratio is modest, at just 28% of profit. Yet cash flow is typically more important than profit for assessing dividend sustainability, so we should always check if the company generated enough cash to afford its dividend. It distributed 31% of its free cash flow as dividends, a comfortable payout level for most companies.

It's encouraging to see that the dividend is covered by both profit and cash flow. This generally suggests the dividend is sustainable, as long as earnings don't drop precipitously.

Click here to see the company's payout ratio, plus analyst estimates of its future dividends.

Have Earnings And Dividends Been Growing?

Companies with consistently growing earnings per share generally make the best dividend stocks, as they usually find it easier to grow dividends per share. If earnings fall far enough, the company could be forced to cut its dividend. With that in mind, we're encouraged by the steady growth at Phillips 66, with earnings per share up 3.3% on average over the last five years. Earnings per share growth in recent times has not been a standout. Yet there are several ways to grow the dividend, and one of them is simply that the company may choose to pay out more of its earnings as dividends.

Many investors will assess a company's dividend performance by evaluating how much the dividend payments have changed over time. Phillips 66 has delivered 8.5% dividend growth per year on average over the past 10 years. We're glad to see dividends rising alongside earnings over a number of years, which may be a sign the company intends to share the growth with shareholders.

The Bottom Line

Is Phillips 66 an attractive dividend stock, or better left on the shelf? Earnings per share growth has been growing somewhat, and Phillips 66 is paying out less than half its earnings and cash flow as dividends. This is interesting for a few reasons, as it suggests management may be reinvesting heavily in the business, but it also provides room to increase the dividend in time. We would prefer to see earnings growing faster, but the best dividend stocks over the long term typically combine significant earnings per share growth with a low payout ratio, and Phillips 66 is halfway there. It's a promising combination that should mark this company worthy of closer attention.

With that in mind, a critical part of thorough stock research is being aware of any risks that stock currently faces.

Generally, we wouldn't recommend just buying the first dividend stock you see. Here's a curated list of interesting stocks that are strong dividend payers.

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.