2026 Real Estate Tax Reform: Stronger Holding Taxes on Non-Resident Properties and Impact on the Gangnam Market
Following the announcement of the 2026 tax reform plan, increased tax burdens on non-resident homeowners and ultra-high-net-worth properties are leading to a surge in real estate listings, particularly in the Gangnam area.
Core of the 2026 Tax Reform: Shift from 'Holding' to 'Residency'
The government's tax reform plan, announced in August 2026, completely overhauls the real estate tax framework from being based on the 'number of properties held' to focusing on 'actual residency' and 'combined aggregate value'. This reform focuses on protecting single-property owners residing in their homes while normalizing taxation on non-resident real estate held for investment purposes.
Tiered Comprehensive Real Estate Holding Tax Deductions
The most prominent change is the dual structure of the base deduction limit for the Comprehensive Real Estate Holding Tax for single-property owners. The base deduction for resident single-property owners has been raised from 1.2 billion won to 1.4 billion won, significantly easing their tax burden. In contrast, the base deduction for non-resident single-property owners failing to meet residency requirements has been lowered from 1.2 billion won to 900 million won. This effectively means a sharp increase in the tax liabilities for investors holding properties in high-value residential areas without occupying them.
Changes in Property Tax Calculation and Increased Fair Market Value Ratio
The fair market value ratio, a key metric for calculating property taxes, has been increased from the current 60% to 70%. Furthermore, instead of abolishing the heavy taxation system for multiple-home owners, it has been reorganized into a progressive tax structure based on the combined assessed value of the properties. Consequently, those owning multiple properties or high-priced homes in areas with high assessed values, such as the Gangnam district, will face higher tax bases than before if they do not meet the residency requirements.
Ripple Effects on the Gangnam Real Estate Market
The residency-centric tax reform is having an immediate impact on the real estate market in key areas of Seoul, particularly the three Gangnam districts (Gangnam, Seocho, and Songpa).
Surge in Listings Due to Property Tax Burden Concerns
Immediately following the announcement of the tax reform plan, inquiries about selling apartments have noticeably increased, centered around the Gangnam area. In particular, gap investors who own properties in complexes undergoing reconstruction or ultra-high-priced apartments that have recently seen significant price appreciation, but fail to meet the residency requirements, are putting their properties on the market to avoid the increased tax burden. In some complexes, listings with lowered asking prices are being observed as owners attempt to dispose of assets before the Comprehensive Real Estate Holding Tax assessment date.
Deepening Buyer Hesitation and Concerns of a Transaction Cliff
Although listings continue to flow into the market, the conversion rate into actual transactions remains low. Prospective buyers are maintaining a wait-and-see approach, anticipating further price declines resulting from the tax reform. Compounded by recent macroeconomic uncertainties and market interest rate volatility, the Gangnam sales market is experiencing a so-called 'transaction cliff' where the spread between asking prices and actual transaction prices is widening.
Shortage of Jeonse Supply and Restructuring of the Rental Market
One of the most significant side effects of this tax reform is the instability in the jeonse (lump-sum deposit rental) market. As penalties for non-resident properties are strengthened, there is a rapid surge in cases where landlords who previously rented out their properties are transitioning to actual residency. This has led to a sharp decline in new jeonse listings in key school districts and prime infrastructure areas in Gangnam, resulting in an exacerbation of the rental supply shortage. The scarcity of jeonse listings is, in turn, accelerating the transition towards semi-jeonse (mixed deposit and monthly rent) and monthly rent formats.
Future Market Outlook and Implications
The 2026 real estate tax reform is highly likely to entrench a 'residency premium' in the asset market. While there are relief provisions (up to a 3-year grace period) for exceptional circumstances such as schooling or illness, the fundamental increase in the tax burden is forcing a restructuring of portfolios for multiple-home owners and non-resident high-priced property owners. It is time for market participants to avoid short-term gap investments and re-evaluate their asset management strategies, focusing on cash flow and actual residency value.