A Hawaii prenuptial agreement is a written contract signed before the wedding. It sets out how the couple's property, debts, and spousal support will be handled if the marriage ends. Hawaii law calls it a premarital agreement and defines it as an agreement between prospective spouses made in contemplation of marriage.[1.1]
Chapter 572D of the Haw. Rev. Stat. governs every prenup signed in the state.[1] The agreement can settle property rights, inheritance, and alimony, but it cannot reduce a child's right to support.[1.11] It takes effect only when the couple marries.[1.12] You can build one with the free prenuptial template on this page.
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You need a Hawaii prenuptial agreement if you want to decide now how your property and debts will be split later, rather than leave that to a judge. Without one, a divorce court divides the estate of the parties on whatever terms appear just and equitable.[2] A prenup fixes those terms in advance.
Three situations make the document especially useful:
Section 572D-3 of the Haw. Rev. Stat. lists eight subjects a Hawaii premarital agreement may settle. The list is broad. It reaches any property either party owns, whenever and wherever it was acquired. It also extends past property, to matters such as the law that governs how the contract is read.[1.3]
A prenup cannot cut a child's support. Hawaii law says the right of a child to support may not be adversely affected by a premarital agreement, so a clause waiving or reducing child support is unenforceable.[1.11]
Couples sometimes add conduct clauses, such as a penalty if one spouse commits adultery. The statute does not address these clauses by name, and a court may refuse to enforce one it treats as contrary to public policy.[1.10]
Chapter 572D of the Haw. Rev. Stat. is Hawaii's Uniform Premarital Agreement Act, enacted in 1987. It sets the form the document must take, the subjects it may cover, and the narrow grounds on which a court may refuse to enforce it.[1]
The chapter runs to ten sections. These are the five that decide whether your agreement holds up:
Hawaii keeps the formalities short. Section 572D-2 requires two things and nothing more.
A premarital agreement must be in writing and signed by both parties. It is enforceable without consideration.
No notary and no witnesses are required, and neither spouse has to give the other anything of value in return.[1.2] Many couples still sign in front of a notary, because an acknowledged signature is easier to prove years later.
After the wedding, the couple can change or cancel the agreement only by signing another written agreement.[1.13]
A premarital agreement becomes effective upon the marriage of the parties to each other.[1.12] Sign one and then call off the wedding, and it never takes effect. If the marriage is later held void, the agreement is enforced only so far as needed to avoid an inequitable result.[1.20]
Written agreements signed before July 1, 1987 stay valid and enforceable if they were valid as contracts.[1.22] Any limitation period for a claim under a premarital agreement is tolled while the couple remains married.[1.21]
A premarital agreement is binding unless the spouse resisting it proves a statutory defense.[1.14] Whether an agreement is unconscionable is decided by the court as a matter of law.[1.19]
One limit applies however the agreement is written. If a clause eliminating spousal support would leave a spouse eligible for public assistance, the court can order support anyway, to the extent needed to avoid that eligibility.[1.18]
A Hawaii court refuses to enforce a premarital agreement on two grounds. The first is that the spouse resisting it did not execute the agreement voluntarily.[1.14] The second is that the agreement was unconscionable when executed and that spouse was kept in the dark about the other's finances. Nothing else in the statute voids a valid prenup.
The second ground has three parts, and all three must be proved:
A clause cutting a child's support is unenforceable however the rest of the agreement was signed.[1.11] Terms setting custody or visitation do not bind the court either. It decides those questions on the child's best interests at the time of the divorce.
No. Hawaii courts do not split marital property automatically down the middle. On granting a divorce, the judge divides and distributes the estate of the parties, whether community, joint, or separate, on terms that appear just and equitable.[2] An even split is one possible outcome, not the rule.
Section 580-47 tells the judge what to weigh. The list includes the respective merits of the parties, their relative abilities, and the condition each spouse will be left in by the divorce. It also covers the burdens imposed for the benefit of the children and any concealment or failure to disclose an asset.[2]
A prenup changes the starting point. The agreement can fix the disposition of property upon separation or marital dissolution in advance, and the court works from those terms instead of building a division from scratch.[1.5]
You get a Hawaii prenuptial agreement by putting the terms in writing, exchanging full financial disclosure, and both signing before the wedding. There is no witness requirement and no notarization requirement.[1.2] The agreement becomes effective the moment you marry.[1.12]
Yes. Section 572D-2 requires only that the agreement be in writing and signed by both parties, and it does not require either spouse to hire an attorney.[1.2] A prenup drafted and signed without lawyers is enforceable on the same terms as one prepared by a firm.
The risk is not the missing lawyer. It is the disclosure. The two statutory defenses are an involuntary signature and inadequate financial disclosure.[1.14][1.15] Both are avoidable without paying for counsel, as long as you exchange written asset lists and sign well before the wedding.
Independent legal advice still earns its cost when the estate is large or one spouse owns a business.
Last Updated: September 2026. This guide is reviewed and updated regularly to reflect current Hawaii law. If you notice an error or outdated information, please contact us.
