July 2026 Comprehensive Real Estate Tax Reform: 80% Fair Market Value Ratio Review and Tax Burden Outlook

Comprehensive Real Estate Tax Emerging as the Core of Property Tax Reform

The reform of the Comprehensive Real Estate Holding Tax is taking center stage in the government's tax reform plan, scheduled for release in late July 2026. As apartment transaction prices in major Seoul areas show a strong rebound, accompanied by rising jeonse and monthly rent prices, housing cost burdens are intensifying. Consequently, the government and political circles are actively discussing concrete measures to secure tax equity and rationally adjust excessive property tax liabilities. The core of this reform focuses on adjusting the 'fair market value ratio' used to calculate the tax base, alongside a fundamental structural shift in the taxation criteria.

Reviewing an 80% Fair Market Value Ratio and Its Revenue Impact

Currently, the fair market value ratio applied to the official valuation when calculating the tax base for residential comprehensive real estate tax stands at 60%. Because this ratio can be swiftly adjusted through government enforcement decree revisions without the complex process of legislative amendment, it serves as the most direct tool for controlling tax burdens in response to macroeconomic conditions. According to recent discussions within political circles and the Ministry of Economy and Finance, the government is strongly considering raising this ratio to approximately 80% as part of its real estate tax normalization efforts.

If the fair market value ratio is increased to 80%, the tax burden perceived by taxpayers is expected to rise steeply. According to a recent tax revenue simulation analysis published by the National Assembly Budget Office, a sudden increase of the ratio from 60% to 80% would cause the average residential comprehensive real estate tax burden per person to surge from the current 3.24 million won to approximately 6.24 million won—a 92.5% increase. Such a rapid escalation in tax liability could act as a significant financial pressure not only for multiple-home owners but also for single-home owner-occupants in the metropolitan area where official valuations have spiked.

Shifting the Tax Base from 'Number of Homes' to 'Property Value'

Beyond the short-term prescription of ratio adjustments, active discussions are underway to modernize the comprehensive real estate tax criteria itself. The primary point of contention is completely transitioning the basis for determining the targets of the tax rate from the current 'number of owned homes' to the 'total value of owned properties'.

• Structural Limitations of the Current System: Under the current system, there have been persistent issues of tax regressivity, where taxpayers owning multiple low-cost homes in regional areas are subjected to much higher penalty tax rates than those owning a single ultra-high-priced home in the affluent Gangnam areas of Seoul.
• Expected Effects of a Value-Based Reform: By levying taxes proportional to the total asset value of real estate owned by the taxpayer, regardless of the number of properties, the system can establish a rational taxation framework that adheres to the ability-to-pay principle.

Targeted Tax Increases on Ultra-High-Priced Homes and Protection for Actual Residents

Due to concerns that raising the ratio and overhauling the tax system might inadvertently trigger tax resistance from actual residents, a 'targeted tax increase' (pinset tax) is being discussed as a sophisticated supplementary measure. This represents a segmented approach that increases overall tax revenue but concentrates the burden specifically on owners of ultra-high-priced homes or non-residential properties.

To implement this, policymakers are considering drastically expanding deduction benefits in proportion to long-term holding and actual residence periods, or subdividing the tax base brackets much more densely to limit the targets subject to the highest tax rates to a very small minority. These micro-adjustments are interpreted as a policy intention to mitigate wealth inequality in the real estate market while minimizing tax resistance.

Future Outlook and Asset Market Response

How the comprehensive real estate tax reform takes shape in the July tax reform plan will mark a critical inflection point for the supply-demand structure and asset portfolio restructuring in the real estate market during the second half of the year. While legislative risks, such as delays in bill processing due to the stalled formation of the latter half of the 22nd National Assembly, remain present, market participants must exercise particular caution, as the adjustment of the fair market value ratio can be implemented immediately through decree revisions without National Assembly consent.

Investors heavily weighted in real estate assets should rigorously recalculate their expected comprehensive real estate tax liabilities relative to the official valuations of their holdings around the policy announcement. Furthermore, this is a time that demands a data-driven, conservative approach to re-evaluate and rebalance multi-home portfolios based on 'asset value' rather than simply the number of homes.