The first thing you wonder when you own two houses and sell one is, “Will I be hit with a tax bomb?”Fortunately, there are cases where even two-home owners can receive tax exemption if the conditions are met.We have organized the principles, exceptions, and calculation structures together.⚠️ Capital gains tax is an area where taxes can vary by tens of millions of won or more in just one day.This article is a reference to understand the overall structure, and we recommend that you consult a tax accountant before actually selling.Principle: Two houses are not tax-exempt.In principle, the capital gains tax exemption only applies to one homeowner per household.Even for a single home owner who meets the tax exemption requirements, if the transfer value exceeds KRW 1.2 billion, tax is imposed on the excess amount.In principle, if you sell a house while owning two houses, tax exemption is not applied and the entire capital gain is taxed.In addition, if a house is located in an area subject to adjustment, a heavy tax rate of up to 20% points may be applied to the basic tax rate.💡 Things to keep in mind as of 2026: The increased transfer tax for multiple homeowners is temporarily suspended until May 9, 2026.If you transfer within this period, the basic tax rate (6-45%) will be applied without additional penalties, and you can also receive a special deduction for long-term holding.However, since this is a limited-time measure, you must check the latest policy at the time of sale.Exception 1: Temporary two-home tax exemption — ‘1·2·3 rule’For reasons such as moving, studying, or employment, people often buy a new home first and sell the old home later.This type of ‘temporary second home’ can be exempted from taxation when selling an existing home if the conditions below are met.Acquiring a new home more than 1 year after acquiring the previous homeThe previous house itself must have met tax-exemption requirements (holding period, residence period, etc.)Dispose of the previous home within a certain period of time (usually 3 years) from the date of acquisition of the new home.The key is the selling order.This special exception applies only if you sell your existing home first.If you have an inherited home, you must sell the home you originally lived in first to receive a tax exemption, rather than selling the inherited home first.If the disposal deadline is missed by just one day, the tax exemption will disappear and taxes will be imposed on the entire capital gain, so it is important to calculate the disposal deadline in advance based on the date of acquisition of the new home.Exception 2: Special case for two houses created for special reasonsIf you are forced to own two houses for the following reasons, a separate tax exemption applies.2nd house due to inheritance: If you transfer the house you originally lived in (general house) first, even if you have an inherited house, it is recognized as tax-exemptTwo houses due to marriage: If two people who each own one house get married and have two houses, the house sold first within 5 years from the date of marriage is exempt from tax.Two houses due to support of parents (cohabitation support): If the owner of one house has two houses by combining the household with a direct ascendant over the age of 60, the house sold first within 10 years from the date of joint ownership is exempt from tax.2 houses due to pre-sale rights: Pre-sale rights acquired after August 12, 2020 are included in the number of houses, but if the existing house is sold within a certain period (usually 3 years) after acquiring the pre-sale right, special tax exemption can be applied.Since the disposal deadline and detailed requirements are different for each special case, you must first check exactly what reason you fall under.How is capital gains tax calculated?The basic calculation flow is as follows:Transfer gain = transfer price − acquisition price − necessary expenses (brokerage fee, acquisition tax, capital expenditure, etc.)Application of special deduction for long-term holding: A certain percentage is deducted depending on the holding/residence period (for two-home owners who do not meet tax-free requirements, the deduction rate is often applied lower than for one-home owners)Calculate tax base by subtracting basic deduction (KRW 2.5 million per year) from capital gains amountCalculate the tax amount by multiplying the tax base by the tax rate (basic tax rate 6-45%, additional tax rate if subject to heavy tax)10% of the calculated tax amount is separately levied as local income taxBecause the calculation structure itself is complex and has many variables, it is recommended to use the National Tax Service’s Hometax or the capital gains tax simulation calculation service provided by the National Tax Service to obtain an accurate estimate of the tax amount.Deadline for reportingIf you transfer real estate, you must report and pay capital gains tax to the tax office with jurisdiction over your address within two months from the end of the month in which the transfer date belongs.For example, if you receive the balance on July 15th, the reporting and payment deadline is September 30th.Local income tax must be reported and paid separately from national tax, and if it is not reported within the deadline, a penalty tax may be imposed for non-reporting.finishing tipsThe order of sale and disposal deadline can vary by one day, so be sure to calculate the date accurately and mark it on your calendar.If you have an inherited home, check which one you need to sell first.If you mistake the order, you may miss out on tax exemption.Temporary measures with a set deadline, such as deferral of tax burden for multiple homeowners, must be rechecked at the time of sale.Since this is an area where the amount is large and the requirements are complex, it is safest to consult with a tax accountant in advance if you are planning to sell.This article has been written for general information purposes and is not a substitute for individual tax advice.The exact tax exemption requirements and tax amount vary greatly depending on individual circumstances, so be sure to check with the National Tax Service’s Hometax (hometax.go.kr) or a tax expert before selling.
