De Facto Marriage Inheritance Lawyer
De Facto Marriage Inheritance Lawyer | Why cohabiting partners are left out of inheritance, and what can still be done
A de facto spouse (a partner in a long-term cohabiting relationship without marriage registration) is not recognized as a legal spouse for inheritance purposes under Korean law. Only a legally registered spouse has statutory inheritance rights (민법 제1003조), so a surviving partner typically receives nothing automatically when the other partner dies without a will. Depending on the facts, claims such as a special contribution claim, a share of jointly accumulated property, or reliance on a will or life insurance beneficiary designation may offer partial relief. This page explains why the gap exists and how it is commonly addressed in practice.
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
The relationship history, the estate's assets, title records, and any will or beneficiary designations are reviewed to identify what legal theory actually applies.
Depending on the facts, the case is framed as a joint-property claim, unjust enrichment claim, forced heirship dispute, or a defense against a challenge from legal heirs.
Bank records, cohabitation proof, contribution history, and communications are compiled to support the chosen claim before any negotiation or filing.
Many disputes are resolved through direct negotiation or mediation with the deceased's legal heirs before formal litigation is filed.
If negotiation does not resolve the dispute, a civil suit (property claim) or a family court proceeding (forced heirship, will validity) is filed and pursued to judgment.
De Facto Marriage Inheritance | How fees are typically calculated in these cases
An initial review of the relationship facts, estate composition, and available evidence, which determines which legal theory the case should pursue.
Set based on the complexity of the claim (property dispute, contribution claim, or forced heirship litigation) and the estimated value of the assets in dispute.
Where applicable, calculated as a percentage of the amount actually recovered or preserved for the client, agreed in advance and confirmed in the engagement letter.
Court filing fees, appraisal costs for real property or business valuation, and any expert report fees are billed separately as they are incurred.
※ 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
1️⃣ For a surviving de facto partner
- Can you document the cohabitation period with objective records (leases, utility bills, joint accounts)?
- Did your partner leave a will, insurance designation, or any written statement about assets?
- Is any real estate or bank account jointly titled in both your names?
- Did you make specific financial contributions (renovation costs, loan payments, business investment) you can trace with records?
- Are the deceased's legal heirs already aware of your relationship, or is this likely to be disputed?
2️⃣ For legal heirs facing a claim from a de facto partner
- Has the partner asserted an inheritance right directly, or a separate property/contribution claim?
- Is there a will or beneficiary designation naming the partner, and was it properly executed?
- Could a forced heirship claim be relevant if assets were already transferred to the partner during the deceased's lifetime?
- What is the actual evidence of the cohabitation's duration and the partner's financial contributions?
3️⃣ If you are currently in a long-term cohabiting relationship (planning ahead)
- Have you and your partner discussed registering your marriage, even after many years together?
- If you choose not to register, has either of you executed a will addressing what happens to your assets?
- Are jointly used assets (home, savings, business) titled in a way that reflects your actual intentions?
- Have you kept records of financial contributions in case they become relevant later?
