Regular readers will know that we love our dividends at Simply Wall St, which is why it's exciting to see Tetra Tech, Inc. (NASDAQ:TTEK) is about to trade ex-dividend in the next two 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. The ex-dividend date is of consequence because whenever a stock is bought or sold, the trade takes at least one business day to settle. Thus, you can purchase Tetra Tech's shares before the 14th of May in order to receive the dividend, which the company will pay on the 2nd of June.

The company's next dividend payment will be US$0.072 per share. Last year, in total, the company distributed US$0.26 to shareholders. Looking at the last 12 months of distributions, Tetra Tech has a trailing yield of approximately 0.9% on its current stock price of US$30.29. 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! We need to see whether the dividend is covered by earnings and if it's growing.

Dividends are typically paid out of company income, so if a company pays out more than it earned, its dividend is usually at a higher risk of being cut. Tetra Tech is paying out just 15% of its profit after tax, which is comfortably low and leaves plenty of breathing room in the case of adverse events. 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. What's good is that dividends were well covered by free cash flow, with the company paying out 10% of its cash flow last year.

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?

Businesses with strong growth prospects usually make the best dividend payers, because it's easier to grow dividends when earnings per share are improving. Investors love dividends, so if earnings fall and the dividend is reduced, expect a stock to be sold off heavily at the same time. That's why it's comforting to see Tetra Tech's earnings have been skyrocketing, up 21% per annum for the past five years. Tetra Tech earnings per share have been sprinting ahead like the Road Runner at a track and field day; scarcely stopping even for a cheeky "beep-beep". We also like that it is reinvesting most of its profits in its business.'

Another key way to measure a company's dividend prospects is by measuring its historical rate of dividend growth. Since the start of our data, 10 years ago, Tetra Tech has lifted its dividend by approximately 15% a year on average. It's exciting to see that both earnings and dividends per share have grown rapidly over the past few years.

Final Takeaway

From a dividend perspective, should investors buy or avoid Tetra Tech? Tetra Tech has been growing earnings at a rapid rate, and has a conservatively low payout ratio, implying that it is reinvesting heavily in its business; a sterling combination. Overall we think this is an attractive combination and worthy of further research.

Wondering what the future holds for Tetra Tech? See what the seven analysts we track are forecasting, with this visualisation of its historical and future estimated earnings and cash flow

If you're in the market for strong dividend payers, we recommend checking our selection of top dividend stocks.

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.