We signed a prenup in California before marrying — will a Korean court honor it now that my Korean wife has filed for divorce here?

Your colleague is half right, and the half he is wrong about matters. Korean law does recognize marital property agreements, but with limits — most importantly, a contract about how property is owned during the marriage is not the same thing as a waiver of property division at divorce, and Korean courts have been reluctant to treat a prenup as a complete bar to division. What a California prenup with full disclosure and independent counsel can do, in a Korean court, is prove that specific assets were meant to remain separate, and that evidence goes a long way under Korean rules that already exclude pre-marital and gifted property from the divisible pool. The apartment bought with trust funds is the contested piece. Freeze nothing yet; document everything now.

Which law governs the prenup, and which governs the divorce

The divorce itself is under Korean law: your wife is a Korean national habitually resident here, so under Article 66 of the Act on Private International Law (국제사법, gukje sabeop) Korean law applies, and Korean law governs property division on divorce.

The agreement is a different question. The marital property regime — the rules on ownership between spouses during the marriage — is governed under Article 65 of the same Act by the law that governs the marriage's general effects, with an exception: spouses may choose the law of either's nationality or habitual residence to govern their property, if the choice is in writing, signed and dated. A California prenup executed with those formalities is a candidate for that exception, meaning California law may govern what the agreement means and whether it is valid. But even where a foreign law governs the agreement, its effect on a Korean court's power to divide property at divorce is a Korean-law question — and that is where the limits come in.

What Korean courts do with prenups

The Civil Act permits spouses to make a marital property contract (부부재산계약, bubu jaesan gyeyak) before marriage; it is effective against third parties only if registered, and it can be changed after marriage only with court approval. Korean courts treat such contracts as governing ownership during the marriage. Whether they can exclude the court's power of property division (재산분할, jaesan bunhal) under Article 839-2 at divorce is the contested point: division is seen as a statutory right that also serves post-divorce support, and courts have generally held that a pre-marital waiver of it is not simply enforced as written. The prenup is therefore evidence, not a verdict.

Here is what that means in practice. Pre-marital assets and property received by gift or inheritance are already excluded from the pool under Korean law as separate property (특유재산, teugyu jaesan), unless the other spouse contributed to maintaining or increasing them. Your trust and its distributions are, on the face of it, exactly that; the prenup confirms the intent and the separateness. The apartment is harder: it was acquired during the marriage, in Korea, with funds traceable to the trust. A Korean court asks whether the funding was separate and whether your wife contributed — through income, through supporting the household, through her career being the reason you both live here. Tracing wins the first argument; the second is decided on the facts of your marriage.

Which route: agreement, mediation, litigation

Property disputes of this kind usually resolve in mediation (조정, jojeong) once both sides see the tracing evidence and understand what the court is likely to do with the prenup. A properly presented tracing file changes what her lawyer asks for.

Children, property and support

You did not mention children. Consolation money (위자료, wijaryo) is separate and depends on fault.

What this means for your stay in Korea

Your F-6 continues during the case; the divorce judgment matters afterward, and how depends on the Immigration Office. MEGA X handles the divorce; where the result affects your stay, we coordinate with an immigration specialist as part of the case.

What to do now

Assemble the trust documents, every distribution with dates and amounts, the bank records showing distributions flowing to the apartment purchase, and the purchase contract and registration. Get the prenup translated and, if California law is to govern it, a short opinion from California counsel on its validity there. Do not move trust funds or encumber the apartment; a transfer now invites a provisional attachment (가압류, gaapnyu) and looks like dissipation. If you fear she will attach the apartment, that is a reason to file the tracing evidence early, not to move assets.

Practical insight

Foreign spouses with prenups lose in Korea by arguing the document instead of the money. A court that will not simply enforce a waiver of division will still exclude separate property it can see was separate. The file that wins is the bank trail from the trust to the apartment; the file that loses is a certified translation of the prenup and an argument about California law. Build the first, bring the second as support.

Send us the prenup, the trust distribution history and the apartment purchase records, and we can tell you what the pool is likely to contain — by text consultation or at +82-2-522-3959.

— MEGA X Law Firm Korea, International Family Law Team