Korea Capital Gains Tax Calculator (Housing)
Enter your acquisition price, necessary expenses, and sale price to calculate Korean capital gains tax on housing (current law) for one-household-one-home owners and multi-home owners. For acquisition tax, property tax, and comprehensive real estate tax, use the Acquisition Tax Calculator and Property Holding Tax Calculator.
💡 Curious how the proposed 2026 tax reform (not yet law) would change this? → 2026 Reform Preview
Legal Basis
- Basis: Income Tax Act, Article 89(1) (exemption), Article 95(2) (long-term holding deduction), Article 103 (basic deduction), Article 104 (tax rates), Enforcement Decree Article 154(1) (holding/residency requirements) — View full statute
- Basis: Local Tax Act (10% local income tax) — View full statute
Frequently Asked Questions
What counts as necessary expenses?
Costs actually incurred during acquisition and transfer — such as acquisition tax, notary fees, and brokerage fees — plus capital improvements that raise the property's value, like window replacement, balcony extension, or remodeling. Ordinary repairs like wallpaper or flooring replacement don't count. Keep receipts and contracts as proof, since you'll need them to claim these expenses when actually filing.
What if I don't know my acquisition price?
If you've lost the purchase contract or other records from long ago, the law provides a separate converted acquisition price method using the standard assessed value ratio. This calculator does not yet support that method — consult a tax professional or use the National Tax Service Hometax simulator if this applies to you.
What are the one-household, one-home exemption requirements?
You must have held the home for at least 2 years, and if it was in a regulated area at the time of acquisition, you must also have resided there for at least 2 years (for acquisitions on or after August 3, 2017, under the "8.2 measures"). Seoul's Gangnam, Seocho, Songpa, and Yongsan districts have been continuously regulated since then, and as of October 2025 the designation expanded to all of Seoul. If you meet the requirements, sale proceeds up to ₩1.2 billion are exempt; for homes sold above that, only the gain corresponding to the excess portion is taxed. If you don't meet the requirements, the entire gain is taxed even if the sale price is ₩1.2 billion or less.
When does the multi-home surcharge apply?
It applies when you own 2 or more homes and sell one located in a regulated area (regardless of how long you held it). The rate surcharge is +20 percentage points for 2 homes and +30 percentage points for 3 or more homes, and homes subject to the surcharge also lose the long-term holding deduction entirely (Income Tax Act §95(2)).
What if I sell within 2 years?
Housing sold after being held for under 1 year is taxed at a flat 70%, and 1–2 years at a flat 60%, instead of the progressive schedule. You also can't get the long-term holding deduction (requires 3+ years) or the one-home exemption (requires 2+ years). If the property is also subject to the multi-home surcharge, tax is calculated both ways and the larger amount applies.
Why might this calculator's result differ from my actual tax bill?
Various reliefs — temporary two-home ownership, win-win lease housing, regional second-homes — have detailed eligibility conditions this calculator doesn't reflect. It also doesn't support the converted acquisition price method for cases where the original purchase price is unknown. Always verify with the National Tax Service Hometax simulator or a tax professional before filing.