July is known as "Tax Month" in South Korea, as the government prepares to unveil its tax reform proposals. Speculation and forecasts about potential tax changes are rampant. The Ministry of Economy and Finance has been issuing daily clarifications stating that the specifics of the 2026 tax reform plan have not yet been decided. It remains uncertain what taxes will change and how; only time will tell.
In the Yeouido financial district, tax issues are also a hot topic. The stock market is as sensitive to tax changes as the real estate market. There is a precedent for this sensitivity, particularly regarding the controversy surrounding the introduction of the Financial Investment Income Tax (known as the “금투세”) from 2022 to 2024. This tax applies to profits made from stock investments, while stock transactions are currently taxed only for major shareholders.
The introduction of the financial investment tax has sparked significant debate over the past two administrations. It was first introduced at the end of 2020 under the Moon Jae-in administration, with implementation set for early 2023. However, retail investors, often referred to as “개미,” strongly opposed it, with over 70% of public opinion polls reflecting opposition. A petition campaign demanding the repeal of the tax was also launched.
The Yoon Suk Yeol administration, which took office in 2022, postponed the implementation of the tax by two years to early 2025, again in response to retail investors' concerns. In 2024, the government officially decided to abolish the tax through the tax reform plan. The then-opposition party, the Democratic Party, faced internal conflict over how to respond to the government's decision to abolish the tax but ultimately agreed to its repeal.
Now, there are questions about whether the controversial financial investment tax could be reintroduced. As the stock market experiences a boom, concerns about asset polarization in the investment market have led to renewed discussions about the tax's potential revival.
The government maintains that no decisions have been made yet. However, there are signs of shifting sentiments, particularly from lawmakers in the ruling party who have begun to hint at possible changes to stock market-related taxes.
The discussion was initiated by Jin Sung-jun, a member of the Democratic Party and a prominent advocate for the financial investment tax. In a radio appearance on June 16, he reiterated his support for the tax, stating, "The financial investment tax not only serves to redistribute wealth but also modernizes the irrational aspects of our financial tax system. Since it only taxes profits exceeding 50 million won, it is actually beneficial for most small investors."
At a forum held on June 23 in the National Assembly, discussions about reforming capital market taxation included proposals for taxing unrealized gains on both real estate and stocks. For instance, it was suggested that taxes should be levied on substantial unrealized gains from stock investments even if the stocks are not sold.
The prospect of the financial investment tax's revival has already stirred anxiety among retail investors. Major online forums related to stocks are filled with comments warning that the reintroduction of the tax could lead to a significant market crash. The argument that the tax aligns with the fundamental principle of taxation—"taxation where there is income"—does not resonate with retail investors, who feel that any new tax would diminish the attractiveness of domestic stock investments, potentially driving away foreign investors and large stakeholders.
In this context, the financial investment tax has become a matter of belief rather than mere speculation and analysis. Proponents of the tax have failed to assuage fears that its introduction would lead to a market collapse, and arguments for correcting an irrational tax system do not alleviate concerns about the potential exodus of major investors. Like real estate, the stock market and its investors are highly sensitive to tax changes.
As the KOSPI index fluctuates dramatically, experiencing both sharp declines and surges, the market remains highly reactive to negative news. As 2026 unfolds, it remains to be seen what conclusions the government will reach regarding the financial investment tax.
* This article has been translated by AI.
Copyright ⓒ Aju Press All rights reserved.