Korea doesn't have a formal "common-law marriage" registration the way some countries do, but its courts have long recognized a separate legal status for couples who live together as spouses in substance — sharing a household, presenting themselves as married, and intending a marital relationship — without ever filing the marriage registration (혼인신고) that makes a marriage legally official. This status is called de facto marriage (사실혼), and it matters enormously for foreign partners, because the gap between what a registered marriage gives you and what a de facto marriage gives you is wider, and stranger, than most couples expect.
→What Actually Makes a Relationship a "De Facto Marriage"
Korean courts don't recognize de facto marriage (사실혼) just because two people have dated for a long time or share an address. They look for the objective substance of a marriage: a shared household, a mutual intent to be married, and a relationship that outsiders would recognize as a marriage in practice — family introductions, joint finances, and the general appearance of a married couple to the people around them. A long-distance relationship, or a living arrangement without the shared intent to be married, generally doesn't qualify, even if it's stable and long-running.
→Property Division Works Almost Like a Divorce — Inheritance Doesn't Work at All
This is the split that catches foreign partners off guard. If a recognized de facto marriage ends, the partner who contributed to the couple's shared assets can generally bring a property division claim (재산분할청구권), much like a divorcing spouse would — Korean courts apply similar principles to divide property built up during the relationship. But a de facto spouse has no statutory inheritance right if the other partner dies. A registered spouse automatically inherits under the Civil Code; a de facto spouse, no matter how many decades together, generally inherits nothing unless there's a will naming them specifically — and even then, a will can be challenged by the deceased's legal heirs in ways a surviving registered spouse's share cannot.
| Right | Registered Marriage | De Facto Marriage (사실혼) |
|---|---|---|
| Property division if the relationship ends | Yes | Generally yes, by analogy to divorce |
| Statutory inheritance on death | Yes, automatic | No — a will is required, and can still be challenged |
| National Pension survivor benefits | Yes | Often yes, if the relationship can be proven |
| F-6 marriage visa eligibility | Yes | No — requires a registered marriage |
| Domestic violence law protections | Yes | Generally yes, extended to recognized de facto spouses |
Immigration Doesn't Recognize It At All
A foreign partner in a long-term de facto relationship with a Korean national gets no immigration benefit from that status by itself. The F-6 marriage visa requires an actual, registered marriage (혼인신고) — cohabitation, no matter how long or well-documented, does not qualify a foreign partner for spousal immigration status. Couples who delay registering their marriage for practical reasons — waiting on document translation, an ongoing divorce from a previous marriage in the home country, or simply putting it off — should understand that the delay also means no path to a marriage-based visa during that time.
Korean law treats a de facto spouse like a real spouse when the relationship ends, and like a stranger when the other partner dies.
1Ending the Relationship Unfairly Can Itself Create a Claim
Korean case law recognizes that unilaterally and unjustifiably breaking off a recognized de facto marriage — without the kind of legitimate cause that would justify ending a registered marriage — can expose the party who ended it to a damages claim from the other partner, on top of the ordinary property division. This surprises a lot of people, because there's no formal "sacsilhon divorce" process; the relationship simply ends when one partner decides it does. But deciding to end it doesn't necessarily end the other partner's legal claims arising from how and why it ended.
2Registering the Marriage Later Doesn't Erase the Question of When It Began
Couples who eventually register their marriage after years of de facto cohabitation sometimes need the earlier period recognized for other purposes — a pension benefit calculation, or a property claim involving assets acquired before the registration date. Korean courts can, in the right circumstances, recognize the earlier start date of a genuine de facto marriage even after formal registration happens later, but this generally requires evidence establishing when the substantive marriage actually began, not just when the paperwork was filed.
→What to Actually Do If You're in This Situation
- Register the marriage (혼인신고) if immigration status matters to you — no length or quality of cohabitation substitutes for it.
- Document the relationship regardless — joint leases, shared bank records, and family communications matter if you ever need to prove a de facto marriage existed.
- Don't assume inheritance is covered — if you want a partner to inherit without a registered marriage, a properly drafted will is the only real protection, and it should account for forced heirship claims from other family members.
- Get advice before ending a long-term de facto relationship — both the property division and the potential damages exposure are real, on either side of the breakup.