Capital Gains Tax in Korea 2026: One Home Exemption Guide

Summary

A practical 2026 guide to Korean capital gains tax for one-home owners, covering exemption rules, the KRW 1.2 billion threshold, and calculation order.

Quick answer

For a Korean resident selling a home in 2026, the first question is not the tax rate. The first question is whether the sale qualifies as a one-household, one-home case. The basic framework is domestic one home at the transfer date, at least two years of holding, and a sale price that does not exceed KRW 1.2 billion. If the home was acquired in a regulated area after August 3, 2017, a two-year residence requirement may also matter.

Calculation order

Start with the sale price, subtract the acquisition price and documented necessary expenses, then calculate the capital gain. After that, review the long-term holding deduction, the basic deduction, and the applicable tax rate. This order matters because many taxpayers jump to a tax rate before confirming whether most of the gain is exempt.

High-priced homes

A sale price above KRW 1.2 billion does not automatically make the entire gain taxable. In a one-home case, only the portion corresponding to the amount above KRW 1.2 billion is treated as taxable capital gain. For example, if the sale price is KRW 1.5 billion and the gain is KRW 500 million, the first taxable ratio starts from KRW 300 million divided by KRW 1.5 billion.

Practical insight

The safest workflow is household test, home-count test, holding period, residence period, high-price threshold, and expense evidence. Owners often make mistakes because they assume a one-home sale is automatically exempt. The actual result depends on acquisition date, regulated-area status, evidence of residence, and whether renovation costs are accepted as capital expenses.

Internal next steps

Use the real estate tax tool, the finance hub, the blog archive, and the tool directory to compare related calculations before making a final filing decision. This draft is educational and should be checked against the latest National Tax Service guidance before publication or real filing.

Internal links

• /tools/real-estate-tax
• /hubs/finance
• /blog
• /tools

FAQ

Q1. Is this tax advice?

No. It is an educational draft and should be checked against current official guidance.

Q2. Does one home always mean exempt?

No. Household status, holding period, residence period, and sale price must be checked.

Q3. What is the key threshold?

KRW 1.2 billion is the core high-price threshold in this guide.

Q4. Why do documents matter?

Expenses and residence facts need evidence.

Q5. Can laws change?

Yes. Recheck before filing.

Q6. Should this row publish now?

No. It remains unpublished until the quality gate approves it.