"A second paycheck: ₩1,000,000 a month in dividends." It's the goal almost every dividend investor starts with. But ask "so how much money does that take?" and the answers get fuzzy — one article says ₩200 million, a video says ₩400 million. Both are right, actually: the required capital nearly doubles depending on the yield and tax assumptions. Let's work through the math step by step.
The formula: target dividends ÷ dividend yield
Once you fix a monthly target, the required capital is a single division.
₩1,000,000 a month means ₩12,000,000 a year. By yield:
| Dividend yield | Required capital (pre-tax) |
|---|---|
| 3% | ₩400,000,000 |
| 4% | ₩300,000,000 |
| 5% | ₩240,000,000 |
| 7% | ~₩171,000,000 |
Between a 3% and a 7% yield, the required capital differs by more than 2× — which is exactly why every "how much for ₩1M a month" article quotes a different number.
Trap 1: forget the 15.4% tax and you miss the target
In Korea, dividends are withheld at 15.4% (14% income tax + 1.4% local tax) before they reach your account. If your goal is ₩1,000,000 after tax, you need roughly ₩1,180,000 a month pre-tax — about ₩14,180,000 a year.
| Dividend yield | Required capital (₩1M/month after tax) |
|---|---|
| 3% | ~₩473,000,000 |
| 4% | ~₩355,000,000 |
| 5% | ~₩284,000,000 |
| 7% | ~₩203,000,000 |
One tax adjustment pushed every number up by 18%. And once your annual financial income (including dividends) exceeds ₩20,000,000, comprehensive financial income taxation may apply on top — worth checking as your portfolio grows.
Trap 2: a high yield usually has a reason
Looking at the table, "just buy the 7% one" feels obvious. But dividend yield is dividends ÷ share price — it often looks high not because the numerator grew, but because the denominator collapsed. That's the classic dividend trap.
- Falling-price type: when earnings deteriorate and the stock halves, the yield doubles automatically. A dividend cut usually follows.
- Overpaying type: companies paying out more than they earn (payout ratio above 100%) can't sustain it.
- Distribution confusion: the high distribution rates of covered-call ETFs mix in option premium — a different animal from traditional dividends.
So dividend investing is less about "today's yield" and more about the strength to maintain and grow the dividend — earnings, payout ratio, and dividend growth history.
The accumulation-phase weapon: DRIP compounding
The target may look far away, but while you're accumulating, reinvesting every dividend (DRIP) shortens the distance dramatically. Dividends buy new shares, and those shares produce new dividends — a compounding loop.
For example: ₩10,000,000 initial + ₩500,000 monthly contributions, assuming a 4% dividend yield + 5% price growth over 20 years (before tax and fees). Total contributions are ₩130,000,000, and:
- With reinvestment: balance of roughly ₩400,000,000
- Taking dividends in cash: balance of ~₩230,000,000 plus ~₩80,000,000 of collected dividends = just over ₩300,000,000
Same money in, and reinvestment alone opens up a gap of about ₩80,000,000. And ₩400 million puts you right on the "₩1M a month at 4%" line from the table above. In other words, monthly dividend income isn't a lump-sum game — it's a contributions + reinvestment + time game.
Run your own numbers — the dividend simulator
The scenarios above are just representative. What you really want to know is "with my initial amount, my contributions, my yield — how many years?" That's a job for a tool.
- Enter your initial amount, monthly contribution, dividend yield, price growth rate, and horizon
- Compare DRIP vs no-DRIP balances side by side on a chart
- See cumulative dividends and total principal year by year
👉 Open the Dividend Reinvestment Simulator — try moving the yield 1% at a time and watch how the timeline shifts.
Curious about the math of recurring investing itself? 👉 The DCA Calculator is a good companion.
Conclusion
The ₩1M-a-month math has three steps. ① Frame it with required capital = annual target dividends ÷ yield → ② re-anchor the target after the 15.4% tax → ③ during accumulation, let DRIP compounding shrink the timeline. Sustainable dividends and time — not the temptation of the highest yield — are what eventually build a dividend paycheck.
⚠️ This article is for informational purposes only and is not a recommendation to buy or sell any security or product. Tax rates described are general 2026 figures for Korea and may differ by individual circumstances. All investment decisions and their outcomes are your own responsibility.
