De Facto Marriage Inheritance Lawyer | Why cohabiting partners are left out of inheritance, and what can still be done

De Facto Marriage Inheritance | Why a de facto spouse has no automatic inheritance right

The Civil Act's inheritance rules are built around the legally registered spouse, not around the reality of cohabitation. This is the single most important fact for anyone in a long-term unmarried relationship to understand.

The statutory order of heirs excludes cohabiting partners

Article 1003 of the Civil Act (민법 제1003조) grants inheritance rights only to the deceased's legal spouse, together with lineal descendants or ascendants. A de facto spouse — however long the relationship lasted — is simply not on this list, because the law defines 'spouse' by marriage registration (혼인신고), not by the substance of the relationship. Courts have consistently applied this rule even where the couple lived together for decades and held themselves out publicly as married.

The distinction from divorce and support cases

Some rights recognized for de facto spouses in other contexts — such as certain social insurance benefits or wrongful death claims — do not extend to inheritance. Family courts have repeatedly declined to treat cohabitation as equivalent to marriage for purposes of Article 1003, reasoning that inheritance law requires a clear, registered status to protect legal certainty for all heirs and creditors.

What happens if there is no will

If the deceased left no will and no legal spouse, the estate passes to children, then parents, then siblings, then more distant relatives in the order set by Article 1000 and 1003 (민법 제1000조, 제1003조). The surviving de facto partner, even if they nursed the deceased through illness or managed the household finances for years, has no seat at that table unless a separate legal basis is established.

De Facto Marriage Inheritance | Remedies that may still be available to a surviving partner

Because there is no direct inheritance right, practitioners look at several indirect routes depending on the specific facts of the relationship and the estate.

Special contribution claim among co-heirs

A special contribution claim (기여분, 민법 제1008조의2) can be raised by a co-heir who specially supported the deceased or contributed to maintaining or increasing the estate, but this claim can only be made by someone who is already a legal heir. A de facto spouse cannot file this claim directly, but the existence and extent of their contribution can sometimes affect negotiations or be raised through a related party.

Claiming a share of property acquired jointly during cohabitation

Where the couple purchased or built up property together — for example a jointly titled home, joint savings, or a business run together — the surviving partner may pursue a civil claim based on joint ownership, unjust enrichment, or a quasi-partnership contribution theory, separate from inheritance law entirely. This is not an inheritance claim but a property dispute that runs alongside the estate proceedings, and the outcome depends heavily on documentary evidence of each party's financial contribution.

A will, life insurance, or gift made while the deceased was alive

If the deceased executed a valid will naming the partner as a beneficiary (유증, 민법 제1074조 이하), designated the partner as a life insurance beneficiary, or made lifetime gifts, those arrangements can transfer assets to the partner outside the statutory inheritance order. However, a will can be contested on formal validity grounds, and gifts made shortly before death may be scrutinized by other heirs asserting a forced heirship claim (유류분, 민법 제1112조 이하).

The forced heirship risk when a will favors the partner

Even a properly executed will leaving assets to a de facto partner is not immune from challenge: forced heirship rules protect a minimum share for the deceased's legal heirs, and a court may order the partner to return part of what was given. Understanding this risk in advance — on both sides — is essential before assuming a will fully resolves the issue.

De Facto Marriage Inheritance | How conflicts with the deceased's legal family typically play out

In practice, most de facto marriage inheritance disputes are not about interpreting a statute — they are practical fights over documents, bank records, and the deceased's real intentions.

Proving the relationship and the contribution

Because a de facto spouse has no automatic standing, the strength of any claim depends on evidence: joint residence records, shared utility bills, remittance history, testimony from neighbors or family, and records showing who actually paid for or managed specific assets. Legal heirs frequently dispute the very existence or duration of the cohabitation, so building a documented timeline early matters.

Negotiating with legal heirs before litigation

Because litigation over property acquired during cohabitation can be lengthy and costly for all sides, many disputes are resolved through negotiation with the legal heirs, sometimes resulting in a partial settlement recognizing the partner's financial contribution without conceding any formal inheritance right. Framing the claim correctly from the outset — as a property or contribution claim rather than an inheritance claim — often determines whether these negotiations succeed.

When the estate includes jointly registered real property

If real property was jointly registered in both partners' names, the surviving partner already owns their registered share outright and it does not enter the deceased's estate at all; only the deceased's share is inherited by the legal heirs. Confirming exactly how title was held is often the fastest way to identify what is, and is not, actually in dispute.

De Facto Marriage Inheritance | From initial consultation to resolving a de facto marriage inheritance dispute

De Facto Marriage Inheritance | How fees are typically calculated in these cases

※ Costs vary depending on case complexity and specific circumstances; exact fees will be provided during consultation. No specific outcome is guaranteed.

De Facto Marriage Inheritance | Self-Check: De Facto Marriage Inheritance Situations

Frequently Asked Questions

Official References

• Korea Law Information Center — https://www.law.go.kr
• Easy-to-Find Everyday Legal Information — https://easylaw.go.kr
• Korea Legal Aid Corporation — https://www.klac.or.kr