South Korea imposes a tax on "paper" profits: stock market crashes on "Black Tuesday"
On June 23, 2026, South Korea experienced a real financial shock. Authorities proposed taxing unrealized profits from stocks and real estate—meaning income that investors haven't even received yet. Markets reacted with an immediate crash, and the day has already been dubbed "Black Tuesday."
This involves a radical change in fiscal policy. Lawmakers, united in a powerful coalition of representatives from the Democratic, Progressive, and Social Democratic parties, as well as the "Rebuilding Korea" movement, propose levying a tax on so-called "paper" profits. An investor no longer needs to sell an asset for the state to consider it income. The mere increase in the value of a portfolio becomes grounds for tax deductions.
The initiative is a continuation of a broader reform. In February, lawmakers already proposed lowering the tax-free threshold for real estate sales from 1.2 billion won to 800 million won (from ~$780,000 to $520,000). In April, cutting tax benefits for long-term asset holders was discussed. Now, authorities have set their sights on the holy of holies—the investor's right to manage their capital until it is actually realized.
Panic on KOSPI and Capital Flight
The financial sector's reaction was swift and extremely painful. Leading companies on the KOSPI exchange literally plummeted in just a couple of hours. Panic gripped all retail investors. The logic is simple: if tax has to be paid on non-existent money, investors will be forced to sell off assets to find liquidity for annual payments. This would knock out long-term investments, deliver a devastating blow to pension savings, and trigger a massive outflow of capital to other Asian jurisdictions.
There is already a precedent in the world. On February 12, 2026, the Netherlands passed a similar law, setting a fixed rate of 36% per year on unrealized profits from stocks, bonds, and crypto assets. The result was immediate: local markets and startups began to rapidly lose ground. Skeptics already cite this experience, arguing that such a regime stifles innovation, pushes talented specialists abroad, and increases pressure on the budgets of ordinary families.
The Battle of Fairness and Common Sense
Supporters of the initiative call it fair. In their view, owners of large assets can afford to pay the tax in advance, while ordinary workers pay from every paycheck. Civil organizations believe that narrowing the gap between these groups is a necessary step for forming a modern tax system.
Expert opinion: The initiative of the South Korean authorities is a time bomb for the local capital market. A tax on unrealized profits creates an absurd situation where the state demands money for income that may never materialize—the market can correct itself at any moment. If the law is passed, South Korea risks losing its status as a regional financial hub, and investors will begin to migrate en masse to Singapore or Hong Kong. The experience of the Netherlands has already shown where such a policy leads—to stagnation and capital flight.