Seoul Apartment Prices Rise for 3 Weeks: Analyzing the 'Inventory Lock-up' Following Capital Gains Tax Deferral Expiration

A New Inflection Point: The End of Capital Gains Tax Deferral

As of May 9, 2026, the capital gains tax deferral targeting multiple-home owners officially came to an end. This signifies a return to a stricter real estate taxation policy by the government, instantly impacting the psychology of market participants. Consequently, the real estate market—particularly in Seoul and key metropolitan areas where investment demand is highly concentrated—is experiencing a distinct and severe 'inventory lock-up' phenomenon. With the circulating supply of properties plummeting in a short period, Seoul apartment transaction prices have charted an upward trajectory for three consecutive weeks, further heightening tension in the market.

The Onset of Inventory Lock-up and Shifting Strategies of Homeowners

With the revival of heavy capital gains taxes, multiple-home owners face the threat of massive tax bombs reaching up to 82.5% upon selling their properties. This excessive tax burden acts as a powerful deterrent, pushing homeowners to choose 'holding' their assets or 'gifting' them to children rather than executing a sale. Ultimately, this has led to an extreme contraction in the market's available supply.

• Sharp Decline in Listings: Examining actual market indicators, within just over ten days following the end of the deferral, the number of apartment listings in Seoul plummeted by more than 5,000. This represents one of the steepest and fastest declines in recent market history.
• The 'Wait-and-See' Strategy: As the financial benefits of selling have practically vanished due to severe tax liabilities, property owners have withdrawn their listings and shifted to a long-term wait-and-see stance. They have entered a holding pattern, gripping their assets while awaiting future policy shifts.

Seoul Apartment Prices Rise for 3 Consecutive Weeks: The Direct Hit of Reduced Supply

After the few existing distressed properties were rapidly absorbed, the inflow of new listings was effectively blocked, causing the market to swiftly restructure into a seller's market. This profound supply-demand imbalance—where there are willing buyers but no sellers—immediately translated into upward price pressure.

• Structural Expansion of the Upward Trend: Seoul apartment prices have recorded distinct gains for three consecutive weeks. What is more notable is that the margin of increase is gradually expanding each week. This can be interpreted not as a temporary rebound, but as structural upward pressure driven by inventory shortages.

Buying Sentiment Spreads to Non-Gangnam and Metropolitan Areas: As asking prices in the traditionally preferred Gangnam districts (Seocho, Gangnam, Songpa) soar, the upward trend is quickly spreading to major non-Gangnam areas such as Seongbuk, Seodaemun, and Gwanak. Furthermore, a chain reaction is occurring as buying sentiment spills over into key prime areas of Gyeonggi Province, such as Gwangmyeong, Bundang, and Suji.

Market Outlook and Implications for Investors

The majority of real estate experts forecast that rather than leading to an irrational short-term spike like in the past, the current upward trend will maintain a gradual, persistent upward pressure within a constrained inventory environment. This is largely because housing buyers, having experienced steep interest rate hikes and market downturns in recent years, still maintain a cautious approach toward aggressive 'chase-buying'.

Comparative Analysis with Past Cases

When similar heavy capital gains tax policies were implemented in the early 2020s, the market inevitably witnessed an inventory lock-up and a subsequent surge in prices. At that time, the low-interest-rate environment added immense liquidity, making the upward curve much steeper. In contrast, in 2026, while there are expectations of interest rate cuts, relatively high rates are still maintained. The current market is driven strictly by the variable of 'supply-demand imbalance' rather than a liquidity-driven rally. This indicates a market restructuring centered around actual end-users, suggesting that price differentiation will become even more extreme based on intrinsic residential values such as regional development news, infrastructure, and school districts.

Concerns Over the Autumn Moving Season and Rental Market Volatility

As the properties of multiple-home owners vanish from the market, concerns are growing not only for the sales market but also regarding practical supply shortages in the rental (jeonse and monthly rent) market. In particular, if rental prices rise ahead of the autumn moving season, the possibility of rental demand shifting into purchasing demand—including gap investments—cannot be ruled out. In such a scenario, the price volatility of the housing market in the second half of the year could expand beyond current market predictions.

In conclusion, under the current circumstances where the policy variable of tax system changes has triggered a structural supply-demand imbalance, it is essential to maintain a conservative and objective perspective. Market participants must carefully monitor multifaceted factors, including the government's additional housing supply measures, loan regulations, and macroeconomic interest rate volatility.