Dividends are cash leaving the company. Two ways a yield rises, which dates matter, sustainability, tax, reinvesting and common dividend-stock mistakes.
A dividend distributes part of what a company earned to its shareholders. Cash that was inside the company moves out, so the company's assets fall by that amount. That is why the share price generally drops by roughly the dividend on the day the entitlement disappears. Receiving a dividend is not purely additional gain.
Dividend yield is the dividend divided by the share price. It rises when the numerator grows, and equally when the denominator falls. A stock whose price has collapsed on bad news suddenly showing a high yield is the classic case. Looking at yield alone cannot distinguish the two.
Receiving a dividend requires being on the shareholder register on a set record date. Since settlement takes days after a trade, buying on the record date itself is too late. The day the entitlement disappears is the ex-dividend date, and the price tends to start lower by roughly the dividend, though the actual open also reflects that day's orders and news. Korean trades settle two business days later, so you must buy at least two business days before the record date. Buying for a dividend and missing it through a date mix-up is common.
To judge whether a dividend is stable, look at how much of earnings goes out as dividends. When that share is very high, even a small fall in earnings makes the payment hard to maintain. Measuring against cash flow rather than earnings is often more accurate. A dividend maintained by borrowing is unlikely to last.
Dividends are decided by the company and can be reduced or suspended at any time. Even companies that raised them for years cut when conditions worsen. Treating dividends as living expenses needs to account for that. This explains the structure and does not address which stocks are appropriate.
Dividends arrive with tax already taken out. Dividends on Korean shares have 15.4% withheld (14% income tax plus 1.4% local income tax) before reaching your account, and if combined interest and dividend income exceeds 20 million won in a year, the excess is taxed together with your other income. US dividends usually have 15% withheld in the US first; Korea typically takes nothing further, but the amount still counts toward your financial income total. From 2026, dividends from listed high-dividend companies that meet set conditions can also be taxed separately at 14 to 30% instead of being added to other income (for fiscal years up to the one containing 2028). So the dividend yield on screen is not the yield you actually keep. These rates and thresholds are as of October 2026 and can change with tax law amendments; if the amounts are large, confirm with the National Tax Service's guidance or a tax professional.
If you put dividends back into the same asset instead of spending them, your holding grows and the next dividend is paid on the larger number of shares. Over long periods this works like compounding. But each reinvestment carries a purchase cost, and tax has already been taken, so results come in below simulations based on pre-tax yields. Reinvesting also doesn't remove the risk of losing principal: if the share price falls sharply, the paper loss can outweigh all the dividends collected. When modelling reinvestment in a calculator, use after-tax dividends and costs, and include a scenario where the dividend is cut.
People who focus on dividends often make the same mistakes. One is thinking you can buy just before the ex-dividend date, collect, and sell straight after for a profit; the price adjusts by the dividend and tax and trading costs apply, so usually nothing is left. Picking only the top of the yield rankings tends to pull in stocks whose prices have collapsed. Concentrating dividend payers in one industry means dividends shrink together when that industry struggles. And watching only the dividend without looking at profit and cash flow makes cuts hard to see coming. This guide explains the structure and recommends no stock.
Check it live