Preventing Intentional Stock Price Suppression: Key Details of the Inheritance Tax Premium and Market Impact
The government has announced the 2026 tax reform plan to prevent intentional stock price suppression for inheritance and gift tax reduction, introducing a new valuation method and up to a 30% tax premium.
Through the 2026 tax reform plan, the government is moving to completely block the practice of intentional "stock price suppression" aimed at reducing inheritance and gift taxes. Underperforming companies meeting specific criteria will face mandatory stock revaluation and a minimum 30% inheritance tax premium.
Criteria for Stock Price Suppression and Taxation Method
According to the recently announced tax reform plan, the criteria for classifying companies suspected of "stock price suppression" are divided into two main categories:
- Long-term undervalued companies: Companies whose Price-to-Book Ratio (PBR) over the past 6 years falls within the bottom 25% of KOSPI or bottom 10% of KOSDAQ.
- Short-term plunging companies: Companies that have engaged in value-destructive actions (e.g., duplicate listings) within the past year, causing their market valuation to drop by more than 30% compared to the 3-year average.
Companies meeting these conditions will undergo stock revaluation by the National Tax Service. Instead of the current "2-month average around inheritance," the government will apply a long-term closing price average of up to 6.5 years or add a 30% premium to the valuation, significantly increasing the tax burden.
Market Impact and Investment Strategy
This policy is widely seen as a positive signal for resolving the chronic "Korea Discount."
- Expectation of Expanded Shareholder Returns: Major shareholders are increasingly likely to implement active stock boosting measures, such as expanding dividends and buying back/canceling treasury shares, to avoid heavy tax penalties.
- Spotlight on Low PBR Value Stocks: Chronically undervalued companies with excessively low PBRs may enter a "value-up" trajectory due to policy pressure, increasing the investment appeal of financials, holding companies, and premium low-PBR stocks.
Frequently Asked Questions (FAQ) on the Anti-Suppression Law
Q1. Do companies have to pay extra tax unconditionally if they meet the criteria?
No, a low PBR or stock price drop does not result in immediate taxation. If the company can prove that the decline was due to legitimate management decisions, the current taxation method will be applied.
Q2. When will this tax reform plan take effect?
This announcement is part of the 2026 tax reform plan. Pending approval by the National Assembly, it is expected to be fully implemented as early as the beginning of next year.