South Korea wants to return unrealized investments in stocks and real estate at a meeting of the National Assembly on Tuesday. The push triggered what local traders are already calling Black Tuesday for the entire Korean market.
The decision could tax investors on paper they have never realized before, and redefine the way assets are used in Asia’s fourth-largest economy.
What the New South Korean Tax Code Says
Unrealized profit is the paper profit an investor has before selling the stock and converting its value into cash. South Korea’s new push they can claim the profit of the paper as taxable incomeeven the bottom goods or goods have never changed hands.
The meeting brought about a strong partnership. Lawmakers from the Democratic Party, Progressive Party, Rebuilding Korea Party, and Social Democratic Party signed it.
In addition, civil society groups, including the Korea Confederation of Trade Unions and the Federation of Korean Trade Unions, joined them.
The forum title puts it well. The organizers organized the event as “Looking at Differences in Taxes on Property Profits and Transitioning to a General Income Tax.” The argument rests on a simple assumption: economic growth reflects an increase in the ability to pay, regardless of whether goods are sold.
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The proposal is the latest step in a broader campaign. In February, lawmakers floated down Home purchase prices range from â‚©1.2 billion to â‚©800 million (~$780,000 to $520,000).
In addition, April’s push focuses on long-term homeowner discounts.
“We need to revive the income tax, reduce taxes and deductions for the highest income earners, and increase the tax brackets to raise the best tax rate for the highest earners,” he said Park Ki-san, director at the Federation of Korean Trade Unions.
Tuesday is the first time the campaign will hit the milestone gains.
Under current law, investors pay tax only when they sell shares and lock in profits. The amendment will also redefine the tax system in all of Korea’s major sectors.
The larger story is important. President Lee Jae Myung it replaced the old plan in September 2025 lowering the income tax rate from â‚©5 billion to â‚©1 billion (~$3.26 million to $652,000) after the bankruptcy of the traders wiped billions off the market value in one trading week.
Why This Petition Started Black Tuesday in Korea
The market reaction was swift and brutal. Traders called June 23 the second Tuesday of Korean products, and the main lists that are passing through the KOSPI is a larger index. As a result, the market sentiment changed drastically just a few hours from the forum.
The fear among investors is constant. The acquisition of tax papers will force the owners to sell shares to pay the annual debt.
Moreover, these policies could disrupt long-term savings, hurt the retirement environment, and accelerate the flight of capital to markets outside of Asia.
All over the world, there is now a visible example. The Netherlands passed a similar law on February 12, 2026, imposing an annual tax rate of 36% on unrealized gains in stocks, bonds, and crypto assets. The Dutch retreat hit the local markets and took off immediately.
The critics are already there pointing to the Dutch example. He says the case of the Netherlands shows how an unsustainable dictatorship can stifle creativity, drive talent abroad, and pressure families.
As a result, opposition lawmakers are expected to step up opposition in the coming weeks.
Supporters rate this process as fair. They say the wealthy can pay upfront before selling, while wage earners pay tax on all wages. Civil society groups insist that closing the gap is essential to modern tax reform.
The way forward is uncertain. Any law must completely abolish the House of Commons, where the parties are divided.
A note South Korea’s Impractical Tax Plan Causes Market Turmoil on Tuesday appeared for the first time BeInCrypto.
