Korea's Overseas Stock Tax: The 2.5m Won Deduction and FX
Korea taxes overseas stock gains above 2.5 million won at 22%. Because the base is won-converted at settlement-date rates, an account down 5% in dollars can still owe 1.9 million won.
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Korea's National Growth Fund: Deduction Stops at 70 Million Won
The income deduction on Korea's citizen-participation National Growth Fund is tiered by investment amount — 40%, 20%, then 10% — so it maxes out at 18 million won once you contribute 70 million. Everything above that buys only the 9.9% dividend tax rate.
Low-Coupon Bond Tax Math: Same 3.5% Yield, 0.37pp Apart After Tax
In Korea, individual bonds are taxed only on coupon interest at 15.4%, while capital gains go untaxed. Two bonds with identical 3.5% pre-tax yields end up 0.37 percentage points apart after tax over three years. Here is the calculation, step by step.
Korea's 20M Won Tax Line vs the 10M Won Health Premium Trigger
Only financial income above 20 million won gets rolled into comprehensive taxation, but health insurance starts counting at 10 million won. A 1-million-won difference can create 480,000 won a year in premiums.