Same-Sex Life Partnership in South Korea
Protected Under South Korean Law?
Table of Contents
- 1. Did the court recognize same-sex de facto marriage?
- 2. How can liability arise if de facto marriage is denied?
- 3. What facts are required to establish a protected life partnership?
- 4. When does a third party become liable?
- 5. How does this differ from the Supreme Court health insurance ruling?
- 6. What should foreign residents in the IFEZ know?
- 7. Frequently Asked Questions
Two people shared a life for seven years. Their salaries went into one account. One partner’s parents bought them rings and called them engagement gifts. They kept vigil together in the family home as a father died. When the relationship ended, the surviving partner held no legal status at all — neither spouse nor de facto spouse.
In June 2026, a South Korean court answered the question this situation raises. The answer came in two parts. A same-sex couple cannot form a de facto marriage. But the life partnership they build is an interest the law will protect. Compared with a 2004 ruling that called such a relationship something that “cannot be accepted in terms of family order under social norms,” the shift in judicial reasoning is unmistakable.
1. Did the court recognize same-sex de facto marriage?
It did not. The Seoul Central District Court held that because the parties were of the same sex, it was difficult to conclude that their relationship constituted a de facto marriage that could be evaluated as a marital community in terms of family order under social norms within the current Korean legal framework. Reading this judgment as recognizing same-sex marriage in South Korea contradicts its actual holding.
Under South Korean law, a de facto marriage requires both a subjective intention to marry and an objective reality of marital life recognizable as a marital community in terms of family order under social norms (Supreme Court of Korea, Judgment of February 10, 1987, 86Meu70). The court applied this standard while noting that the Korean Constitution and Civil Act use gender-specific terms — both sexes, husband and wife, father and mother — in provisions on marriage and family life, which makes it difficult to recognize same-sex legal or de facto marriage as a matter of statutory interpretation.
This follows established precedent. The Incheon District Court dismissed in full the claims of a same-sex partner who had cohabited for roughly twenty years and sought consolation money and property division for wrongful termination of a de facto marriage, holding that such cohabitation “cannot be accepted in terms of family order under social norms” (Incheon District Court, Judgment of July 23, 2004, 2003Deuhap292). A challenge to the rejection of a same-sex marriage registration was likewise dismissed on the ground that under the ordinary interpretation of current law, the agreement of same-sex applicants cannot be treated as an agreement to marry (Seoul Western District Court, Decision of May 25, 2016, 2014Hopa1842).
2. How can liability arise if de facto marriage is denied?
The court separated two doors. Whether a de facto marriage exists and whether the relationship qualifies as a legally protected interest are, in the court’s words, questions to be discussed in different contexts, and denying the former does not necessarily lead to denying the latter.
The starting point is the concept of illegality in tort. The Supreme Court of Korea has held that an unlawful act under Article 750 of the Korean Civil Act is “a flexible concept that is not limited to violations of statute but may also include conduct deemed unlawful under social norms from the perspective of the legal order as a whole,” and that a tort may be established where a legally protected interest is infringed, not only where an absolute right such as ownership is violated (Supreme Court of Korea, Judgment of July 11, 2024, 2023Da314022). A parallel line of authority holds that a third party who knowingly harms another’s interest through unlawful conduct commits a tort (Supreme Court of Korea, Judgment of March 14, 2003, 2000Da32437).
A constitutional foundation was added. The Supreme Court has declared that every person has the right to form a personality and lead a life according to their own gender identity, and that this right “constitutes the essence of the right to pursue happiness as a fundamental right derived from human dignity and worth, and must therefore be guaranteed to the greatest extent possible” (Supreme Court of Korea, Decision of November 24, 2022, 2020Seu616 en banc). Relying on this, the Seoul Central District Court reasoned that a same-sex couple forming a life partnership with the intention to marry is itself a right recognized under the right to pursue happiness, so the need to protect the resulting interest cannot be denied outright.
The final element is the duty of sexual fidelity. A third party who engages in an affair with one spouse, thereby infringing on the marital community that lies at the essence of marriage and causing emotional distress to the other spouse, in principle commits a tort (Supreme Court of Korea, Judgment of November 20, 2014, 2011Meu2997 en banc). The court reasoned that even parties who do not meet the statutory requirements for marriage may freely form a life partnership premised on mutual sexual fidelity, and extended this doctrine to same-sex life partnerships.
3. What facts are required to establish a protected life partnership?
The threshold is demanding. The court required a mutual intention to marry along with an emotional, physical, and economic union, supported here by an unusually thick record of objective facts. Ordinary dating or cohabitation does not clear this bar.
On the intention to marry and emotional union, the court noted that the plaintiff had disclosed his sexual orientation to family and close acquaintances before the relationship began and that his family understood and respected it; that the partner formally greeted the plaintiff’s parents when cohabitation began; that they traveled to France together with the plaintiff’s parents; that they lived in the plaintiff’s family home as his terminally ill father’s condition worsened; that the plaintiff’s parents purchased rings as engagement gifts which the couple wore as a pair; and that the partner referred to the plaintiff as her husband among colleagues.
On economic union, the record was more concrete. The plaintiff transferred his salary to the partner’s account, from which she paid shared living expenses, investments, and interest on the plaintiff’s loans. They jointly discussed apartment subscriptions and financing, and the plaintiff contributed approximately KRW 150 million toward the intermediate and final payments on an apartment purchase in his name. He covered part of the partner’s tuition while she prepared for a licensing examination, supported her with living expenses, provided KRW 10 million toward the security deposit for her office lease, paid monthly into a pension savings plan in her name, and designated her as beneficiary of a mutual aid benefit.
| Stage | Date found by the court | Supporting facts |
|---|---|---|
| Economic community formed | September 2019 | Salary transferred to partner’s account for joint management |
| Life partnership formed (at the latest) | June 2023 | Living with family in the family home; engagement rings from parents |
| Relationship ended | October 2024 | Separation announced after the partner’s involvement with a third party |
The court found that from September 2019 at the earliest, and from June 2023 at the latest, the parties had moved beyond an ordinary romantic relationship and formed a life partnership comparable to a de facto marriage. The converse follows: without proof of a union of this depth, no protection attaches.
4. When does a third party become liable?
Liability arises where the third party knew of the life partnership and, through an affair with one partner, obstructed its continuation or caused its breakdown. Without knowledge, there is no liability. Here the court found knowledge because the defendant regarded the partner as a married woman.
The court’s reasoning runs as follows. Where two persons of the same sex form a life partnership on the basis of an agreement to marry and an emotional, physical, and economic union comparable to a de facto marriage, each owes the other a duty to cooperate in maintaining that partnership, including a duty of sexual fidelity. A third party who, with knowledge of this, engages in an affair with one partner and thereby obstructs the partnership or causes its breakdown commits a tort by infringing a protected interest.
How knowledge was established matters in practice. The partner referred to the plaintiff as her husband when speaking with the defendant and the defendant’s spouse; the plaintiff gave gifts to the defendant and her son through the partner, and the defendant conveyed thanks in return. The court concluded that although the two could not marry because they were of the same sex, the defendant could sufficiently recognize that her own involvement might cause the relationship to break down.
The award falls within the trial court’s discretion. The amount of consolation money for emotional distress caused by a tort is fixed by the trial court after considering all relevant circumstances (Supreme Court of Korea, Judgment of November 26, 2002, 2002Da43165). Weighing the roughly seven-year relationship, the plaintiff’s financial support while the partner prepared for a licensing examination, his efforts to repair the relationship after learning of the affair, and the sense of betrayal he experienced during litigation, the court set consolation money at KRW 10 million. The claim had sought KRW 30,000,100, and the plaintiff bore two thirds of the total litigation costs.
5. How does this differ from the Supreme Court health insurance ruling?
The domains differ. The Supreme Court decision was an administrative case about National Health Insurance dependent status; this case concerns private-law damages between individuals. The two rulings do not replace each other but operate on separate layers.
The Supreme Court held that the National Health Insurance Service’s practice of granting dependent status to persons in a de facto marital relationship while denying it to same-sex partners “constitutes discrimination against an essentially identical group on the basis of sexual orientation.” It further held that excluding a same-sex partner from dependent status solely because the partner is of the same sex “is discriminatory conduct that infringes human dignity and worth, the right to pursue happiness, the freedom of private life, and the right to equality before the law, and the degree of that infringement is serious” (Supreme Court of Korea, Judgment of July 18, 2024, 2023Du36800 en banc). The appellate court below likewise found the differential treatment arbitrary and contrary to the principle of equality while declining to recognize a de facto marriage (Seoul High Court, Judgment of February 21, 2023, 2022Nu32797).
The Supreme Court nonetheless confined the reach of its holding. It emphasized that the case concerned equity in dependent recognition under the particular social insurance scheme of health insurance, that other social security programs must be assessed separately according to their own purposes, and that recognizing a same-sex partner as a health insurance dependent and interpreting the scope of spouse under the Civil Act and family law are questions that “can well be discussed in different contexts.”
| Aspect | Supreme Court 2023Du36800 | Seoul Central District Court 2025Na10110 |
|---|---|---|
| Domain | Social insurance / administrative | Tort / private law |
| Opposing party | National Health Insurance Service | Private individual |
| Analytical tool | Constitutional principle of equality | Legally protected interest |
| De facto marriage recognized | No | No |
| Level | Supreme Court en banc | Appellate panel (lower court) |
6. What should foreign residents in the IFEZ know?
Foreign nationals living in the Incheon Free Economic Zone (IFEZ) should not assume that a partnership registered or married abroad carries the same status in South Korea. A same-sex marriage validly formed in another jurisdiction is not recognized as a marriage under current Korean law, and this ruling does not change that.
What the ruling does establish is narrower and defensive: a life partnership meeting the described threshold is an interest South Korean courts will protect against interference by a third party. It does not create inheritance rights, survivor pension eligibility, authority to consent to medical treatment, or succession to residential lease rights. Each of those follows the purpose and structure of its own statutory scheme.
For residents of Songdo International Business District, Cheongna International City, and Yeongjong International City, the practical response is documentary rather than declaratory. Wills, gifts upon death (sain-jeungyeo), life insurance beneficiary designations, joint titling of real property, and voluntary guardianship agreements each address one piece of what marriage would otherwise cover in a single instrument. Assembling those instruments in advance is what closes the gap that the current legal framework leaves open.
7. Frequently Asked Questions
Q. Did this ruling recognize same-sex marriage or de facto marriage in South Korea?
A. No. The Seoul Central District Court expressly held that neither a legal marriage nor a de facto marriage can be established between persons of the same sex under the current Korean legal framework. The court treated the question of establishing a de facto marriage and the question of evaluating the relationship as a legally protected interest as two separate issues, and held that denying the former does not necessarily mean denying the latter.
Q. Is long-term cohabitation alone enough to receive protection?
A. No. The court required a mutual intention to marry together with an emotional, physical, and economic union. In this case the court relied on numerous objective facts: the plaintiff transferred his entire salary to the partner’s account for joint management, contributed approximately KRW 150 million toward an apartment purchase, received engagement rings from his parents, lived with his family in the family home, and designated the partner as beneficiary of a mutual aid benefit. Mere dating or cohabitation is not sufficient.
Q. Is a third party liable even without knowing about the relationship?
A. No. Liability requires knowledge. The court found that the defendant referred to the plaintiff as the partner’s husband and had exchanged gifts through the partner, and therefore could sufficiently recognize that her involvement could cause the relationship to break down. Liability does not extend to a third party who had no knowledge of the life partnership.
Q. How was the KRW 10 million award calculated?
A. Under Korean law, the amount of consolation money for emotional distress is determined by the trial court in its discretion after considering all relevant circumstances (Supreme Court of Korea, Judgment of November 26, 2002, 2002Da43165). The court weighed the roughly seven-year relationship, the financial support provided while the partner prepared for a licensing examination, the plaintiff’s efforts to repair the relationship, and the sense of betrayal experienced during litigation. The claim sought KRW 30,000,100.
Q. How does this differ from the Supreme Court ruling on health insurance dependents?
A. The Supreme Court case was an administrative matter holding that treating a same-sex partner differently from an opposite-sex de facto spouse for National Health Insurance dependent status violates the constitutional principle of equality (Supreme Court of Korea, Judgment of July 18, 2024, 2023Du36800 en banc). This case concerns private-law damages between individuals. The Supreme Court also confined its holding, noting that interpreting the scope of spouse under the Civil Act and family law is a matter for a different context.
Q. Does this ruling create inheritance rights or survivor benefits?
A. Not directly. This ruling addresses the defensive dimension of protecting a life partnership against third-party interference. Inheritance, survivor pensions, medical consent, and succession to residential lease rights must be assessed separately under each statutory scheme. Foreign nationals and their partners residing in the Incheon Free Economic Zone should plan through wills, gifts upon death, insurance beneficiary designations, joint titling, and voluntary guardianship agreements.
Q. Is this judgment final?
A. No. This is an appellate panel judgment of the Seoul Central District Court, not a final ruling of the Supreme Court of Korea. Because it is a lower court decision, it should be cited on the understanding that the outcome could change on further appeal. Anyone anticipating a dispute on the same issue should first confirm whether the judgment has become final.
This article summarizes the Seoul Central District Court judgment of June 5, 2026 in case 2025Na10110 and the Supreme Court precedents it cites, based on the original texts. Outcomes in individual cases depend on their specific facts.
