2026 Real Estate Capital Gains Tax Savings Strategy — Tax Exemption Conditions for One Home per Household

Key Summary 2026 capital gains tax exemption requirements for one home per household: at least 2 years of ownership + (for adjustment target areas, at least 2 additional years of residence) + full exemption if the transfer price is KRW 1.2 billion or less. Only the portion exceeding KRW 1.2 billion is taxed. In non-adjustment target areas, exemption applies if only the 2-year ownership requirement is met. Special long-term holding deduction: up to 80% for one home per household (3 years of residence + at least 10 years of ownership). Temporary two-home special rule: recognized as one home if the existing home is sold within 3 years after acquiring a new home.

Key answer: In 2026, the one-home-per-household exemption applies when the home has been owned for at least 2 years and the transfer price is KRW 1.2 billion or less.

Basic Structure of Capital Gains Tax

What is capital gains tax?

A tax imposed on the profit (capital gain) generated when real estate (land or buildings) is sold for more than its acquisition price.

Capital gain = Transfer price - Acquisition price - Necessary expenses
Capital gains income = Capital gain - Special long-term holding deduction - Basic deduction (KRW 2.5 million)
Capital gains tax = Capital gains income × Tax rate + 10% local income tax

2026 Capital Gains Tax Rates

Progressive tax rates (held for at least 2 years, general taxation):

One-Home-per-Household Exemption Requirements (2026)

Core Requirements

How Tax Is Calculated When the Price Exceeds KRW 1.2 Billion

Example: Acquisition price KRW 500 million → Transfer price KRW 1.5 billion (capital gain KRW 1 billion)

Taxable capital gain after applying the exemption:
Taxable capital gain = 1 billion × (1.5 billion - 1.2 billion) / 1.5 billion
                     = 1 billion × 3/15
                     = KRW 200 million

→ Capital gains tax is imposed only on KRW 200 million

Scope of One Household

• Includes spouse (legal marriage)
• Family members who live at the same address and share a livelihood
• Unmarried children under 30: treated as part of the same household
• Children aged 30 or older, or children under 30 who can maintain an independent livelihood, may be recognized as a separate household

Differences in Exemption Requirements by Regulated Area

Adjustment target areas (2026 status):

• All areas of Seoul
• Parts of Gyeonggi (Gwacheon, Seongnam Bundang·Sujeong, Hanam, Gwangmyeong, etc.)
• Parts of Incheon
• All areas of Sejong

Caution: If the property was in an adjustment target area at the time of acquisition, the residence requirement applies even if the area is later removed from the designation.

Special Long-Term Holding Deduction

Special Long-Term Holding Deduction for One Home per Household

Real-world example:

• One home per household sold for KRW 1.5 billion (acquisition price KRW 500 million, owned 10 years·resided 10 years, adjustment area)
• Taxable capital gain = 1 billion × (15-12)/15 = KRW 200 million
• Apply 80% special long-term holding deduction = 200 million × 20% = KRW 40 million taxable
• Subtract basic deduction of KRW 2.5 million = KRW 37.5 million
• Apply 15% tax rate (KRW 14 million~50 million bracket) = about KRW 4.36 million in tax
• Result: about KRW 4.36 million (+ KRW 430,000 local income tax) = about KRW 4.79 million in tax on a KRW 1 billion gain

Special Long-Term Holding Deduction Outside One Home per Household

Temporary Two-Home Tax Exemption Special Rule

If you bought a new home but have not yet sold your existing home, you may be treated as owning one home if the conditions are met.

Temporary Two-Home Requirements

Cautions:

• Previous home in an adjustment target area: the 2-year residence requirement still applies
• Must be sold within 3 years after acquiring the new home (strict deadline)
• If more than 3 years pass, heavy taxation for two-home owners may apply at the time of disposal

Practical Tax-Saving Strategies

Strategy 1: Complete the Residence Period

If you own a home in an adjustment target area, the most important requirement is 2 years of actual residence.

Strategy 2: Maximize the Deduction Rate by Extending the Holding Period

The best benefit under the special long-term holding deduction is 8 years + 8 years = 80%. Even holding for just 1 more year can sharply increase the deduction rate.

A 1-year difference can save more than KRW 4.8 million.

Strategy 3: Carefully Deduct Necessary Expenses

Necessary expenses that can be deducted when calculating capital gains:

Caution: Repair costs such as wallpapering and flooring (maintenance expenses) are not recognized as necessary expenses.

Strategy 4: Accurately Identify the Acquisition Date Standard

The holding period is calculated from the earlier of the balance payment date or the registration transfer date. If the balance payment date is earlier than the registration date, the balance payment date is used.

Example:

• Contract: January 2022
• Balance payment: March 15, 2022
• Registration: March 20, 2022
• → Acquisition date = March 15, 2022 (balance payment date)
• Selling on or after March 15, 2024 satisfies the 2-year ownership requirement

Strategy 5: Use Joint Ownership Between Spouses

When a jointly owned home is transferred, each person's share is calculated separately.

Tool Links

• Real Estate Acquisition Tax Calculator — acquisition tax calculation and simulation
• Compound Interest Calculator — long-term real estate investment return analysis

FAQ

Q1. If I have one home per household and the price is KRW 1.2 billion or less, is it always tax-exempt?

A: Even if the price is KRW 1.2 billion or less, the exemption does not apply unless the 2-year ownership requirement is met (including 2 years of residence in adjustment areas). If both the ownership and residence period requirements are met and the transfer price is KRW 1.2 billion or less, the full amount is tax-exempt.

Q2. How is the holding period calculated for a home acquired through redevelopment or reconstruction?

A: The period after approval of the management and disposal plan is combined with the ownership period of the previous home. However, reconstruction association member occupancy rights are complex because separate rules, such as heavy taxation for multiple-home owners, may apply. Consulting a tax accountant is strongly recommended.

Q3. Can a home gifted by my parents qualify as one home per household?

A: The holding period starts anew from the date of the gift. Even if your parents owned it for 10 years, the recipient must own and reside in it for at least 2 years after the gift to meet the exemption requirements. Also note that acquisition tax may be heavily imposed (12%) on homes acquired by gift.

Q4. What if the new home in a temporary two-home situation was acquired as a presale right?

A: You are not treated as owning two homes from the date you acquire the presale right. The home is included in the home count from the completion·move-in date after acquiring the presale right. However, you should separately verify whether capital gains tax applies when the presale right itself is converted into a residential home.

Q5. What is the capital gains tax treatment for homes registered by rental business operators?

A: If a rental business operator met the mandatory rental period (8 years or more) after registration, they could receive a 50~70% special long-term holding deduction, but the rental business registration system was revised after July 2020. Currently, registration of apartments as long-term general private rental housing is restricted, and existing registrants are maintaining their mandatory periods. Be sure to confirm current rules with a tax accountant.

Q6. Can a nonresident living overseas receive the one-home-per-household exemption?

A: Nonresidents are generally restricted from applying the one-home-per-household exemption. However, some exceptions may apply if they left Korea for unavoidable reasons such as overseas business trips or assignments. Because National Tax Service interpretations are complex, consulting a tax accountant in advance is essential.

Q7. By when must I file a preliminary capital gains tax return?

A: You must file and pay the preliminary return within 2 months from the last day of the month in which the transfer date falls. For example, if the transfer takes place in May 2026, the filing and payment deadline is July 31, 2026. A preliminary return is not technically optional in practice; the previous 10% tax credit for filing has been abolished, and failure to file triggers a 20% penalty tax.

Q8. If a one-home owner also owns farmland or a commercial property, are they considered a two-home owner?

A: No. For capital gains tax purposes, only residential real estate (homes) is counted in the number of homes. Farmland (fields·paddies·orchards), commercial properties, and officetels used for business are not included in the home count. However, an officetel used as a residence may be treated as a home, so caution is needed.

💡 Practical Insight

Other blogs repeat only the surface-level conclusion, "KRW 1.2 billion exemption, 2 years of ownership," but the decisive details that actually determine the tax-saving effect are the recognized acquisition date and securing proof of residence. According to the National Tax Service statistical yearbook, about 17% of capital gains tax assessments in 2024 were additional collections for "failure to meet the one-home-per-household exemption requirements," and more than half of these involved failure to prove the residence period (cases where move-in registration existed but evidence of actual residence was weak). In one real case I saw, a married couple claimed they had completed 2 years of residence by living separately for 6 months at a time, but their card usage history, utility payment locations, and children's school addresses were scattered across different cities and provinces. The exemption was ultimately denied, and they were assessed a 38% progressive tax rate plus a 20% penalty. Therefore, owners in adjustment target areas should **immediately after move-in registration preserve ① monthly management fee, electricity, and gas autopay receipts, ② card company merchant-location data

Reference: Ministry of Land, Infrastructure and Transport Real Estate Statistics