Key Takeaways
New Hampshire law recognizes prenuptial agreements. RSA 460:2-a allows two people contemplating marriage to enter into a written interspousal agreement addressing their rights and obligations.
Postnuptial agreements can also be enforceable. Although New Hampshire has no statute specifically authorizing them, the New Hampshire Supreme Court recognizes that spouses may enter into enforceable agreements during marriage.
Courts presume prenuptial agreements are valid. The person challenging the agreement bears the burden of establishing a recognized basis for invalidation.
Fair disclosure and voluntariness matter. Fraud, duress, material misrepresentation, or nondisclosure can undermine an agreement.
Timing carries weight. Although signing shortly before a wedding does not automatically invalidate a prenuptial agreement, timing becomes significant when combined with pressure or other circumstances affecting voluntariness.
Independent legal advice is valuable. Allowing both people sufficient time to obtain separate legal advice can substantially reduce later disputes over fairness and voluntariness.
Parents cannot contract away their children’s rights. RSA 460:2-a expressly prevents a prenuptial agreement from eliminating the statutory or common-law rights of minor children.
What Prenuptial and Postnuptial Agreements Can Accomplish
Prenuptial and postnuptial agreements allow couples to decide in advance how they will handle certain financial issues if their marriage ends. Couples make a prenuptial agreement in contemplation of marriage, and couples enter into a postnuptial agreement after they have already married.
These conversations can feel uncomfortable. Asking for a prenuptial agreement may seem inconsistent with planning a lifelong marriage. A spouse asked to sign a postnuptial agreement may wonder why financial rules need to change after the wedding. Those emotional reactions are understandable, but they can obscure the practical purpose of these agreements.
For many couples, the goal is not to predict divorce, but rather to reduce uncertainty. Agreements may address separate property, businesses, inheritances, retirement assets, debts, property acquired during marriage, and financial rights if the parties eventually separate or divorce.
The legal issues are more complicated than simply writing down what each person wants. New Hampshire courts examine these agreements more closely than ordinary business contracts because of the personal and confidential relationship between the parties. Questions about financial disclosure, voluntariness, fairness, timing, and changed circumstances become important years after the parties signed the agreement.
Understanding those requirements can help couples create agreements that accurately reflect their intentions and are more likely to withstand later scrutiny. It also helps someone facing divorce understand why an agreement is not automatically enforceable, or automatically invalid, simply because one spouse no longer likes its terms.
How New Hampshire Law Treats Prenuptial and Postnuptial Agreements
New Hampshire Statutory Law Recognizes Prenuptial Agreements
New Hampshire law refers to prenuptial agreements as “antenuptial agreements.” Under RSA 460:2-a, two people contemplating marriage may enter into a written interspousal contract. The statute also addresses finding validity of agreements entered into in other jurisdictions, as well as expressly states that an otherwise enforceable agreement cannot contain terms attempting to eliminate the statutory or common-law rights of minor children.
That last limitation is important. Parents can make agreements concerning their own financial rights, but they do not have unrestricted authority to predetermine matters concerning their children.
Prenuptial agreements frequently address what happens to property if the marriage ends. A person entering marriage with a business, substantial investments, real estate, family wealth, or children from a previous relationship may want greater predictability about how the parties will treat those assets.
Agreements can also be useful for couples with relatively ordinary finances. One spouse may enter marriage with a home while the other has significant student debt. Both may simply want to establish expectations before combining their financial lives.
Prenuptial Agreements Are Presumed Valid
New Hampshire appellate decisions establish an important starting point: a prenuptial agreement carries a presumption of validity.
To rebut this presumption, the New Hampshire Supreme Court explained that the party seeking to invalidate an agreement bears the burden of establishing one of three grounds for invalidation. The challenger may show that the agreement resulted from fraud, duress, mistake, material misrepresentation, or material nondisclosure; that it is unconscionable; or that circumstances have changed sufficiently since execution to make enforcement improper. MacFarlane v. Rich, 132 N.H. 608, 614 (1989); In the Matter of Yannalfo and Yannalfo, 147 N.H. 597 (2002); In the Matter of Nizhnikov & Nizhnikov, 168 N.H. 525 (2016).
This means a spouse generally cannot invalidate a prenuptial agreement merely by arguing that the divorce would have produced a better financial result without it.
At the same time, the presumption does not make these agreements untouchable. Courts examine the circumstances surrounding their creation and enforcement.
Voluntariness, Duress, and Timing
A prenuptial agreement should represent a genuine agreement between the parties.
Duress can arise when circumstances show that someone did not meaningfully and voluntarily accept the agreement. New Hampshire cases discuss factors such as wrongful pressure, coercive circumstances created by the other party, and whether the person realistically had an alternative to accepting the proposed terms to determine duress.
Courts may consider the timing between presentation of the agreement and the wedding when assessing voluntariness. In In re Estate of Hollett, 150 N. H. 39, 43 (2003), the Supreme Court emphasized that fairness requires that a party has the opportunity to seek independent advice and reasonable time to consider the proposed agreement.
At the same time, New Hampshire does not follow a rule automatically invalidating every agreement signed immediately before a wedding. Instead, the total circumstances must be examined. Yannalfo illustrates this point. There, shortly before the wedding, one party presented the agreement concerning a $70,000 contribution toward the marital home. However, the Supreme Court rejected automatic invalidation based simply on proximity to the wedding and examined the surrounding circumstances.
The practical lesson is straightforward: waiting until the last few days before a wedding creates unnecessary risk. Negotiating well in advance gives both parties time to review financial information, obtain separate legal advice, consider proposed revisions, and make a thoughtful decision.
Financial Disclosure and Good Faith
Financial disclosure is another central concern.
A person cannot make an informed decision about waiving potential rights without a meaningful understanding of the financial circumstances involved. If one future spouse owns a company worth several million dollars but materially misrepresents its value or conceals its existence, that nondisclosure could become highly significant in a later challenge.
New Hampshire courts scrutinize prenuptial agreements more closely than ordinary commercial contracts because the parties occupy a confidential relationship. The Supreme Court set the expectation as requiring a high degree of good faith, candor, and sincerity, with fairness serving as the ultimate measure. In re Estate of Hollett.
For practical purposes, detailed written financial schedules are valuable. Listing real estate, investment accounts, retirement assets, business interests, debts, and significant income sources creates evidence of what each party knew when the agreement was executed.
Unconscionability and Changed Circumstances
An agreement may also face challenges based on unconscionability or circumstances that have materially changed.
The fact that an agreement produces unequal results does not automatically make it unconscionable. People often create prenuptial agreements precisely because they want a result different from what might otherwise occur under divorce law.
In MacFarlane, the Supreme Court recognized that changed circumstances may potentially create an “unconscionable hardship” sufficient to affect enforcement. Later decisions have continued to recognize changed circumstances as one of the grounds that challenge enforceability.
Changed circumstances become especially important in long marriages. Health problems, disability, major changes in financial circumstances, or other developments the parties could not reasonably have anticipated decades earlier may become part of the analysis.
The court does not simply rewrite an agreement because hindsight makes one side unhappy. Rather, the question is whether the circumstances satisfy New Hampshire’s legal standard for declining to enforce the agreement as written.
Postnuptial Agreements Are Different
Postnuptial agreements deserve separate attention because New Hampshire’s antenuptial agreement statute does not expressly govern them.
The New Hampshire Supreme Court addressed postnuptial agreements in In re Estate of Wilber, 165 N.H. 246, 249 (2013). The Court observed that while postnuptial agreements are neither specifically prohibited nor specifically authorized by New Hampshire statute, the Court recognized the modern rule allowing married people to enter contractual relationships with one another if they satisfy contract formation necessities and are fair.
The Court considers principles governing prenuptial agreements for guidance while also recognizing that the situations are not necessarily identical. Before marriage, either person remains free not to marry. After marriage, the spouses already have an established legal and fiduciary relationship.
That distinction makes careful drafting and fair negotiation especially important. Couples should not treat a postnuptial agreement as simply a prenuptial agreement they signed a few years late, but as a thoughtful, voluntary, and consequential agreement.
Common Examples of Prenuptial and Postnuptial Agreements
Protecting a Business Started Before Marriage
Taylor owns a successful engineering company before becoming engaged. Taylor wants the business to remain separate if the marriage later ends, while Taylor’s fiancé wants protection if marital income or efforts contribute substantially to its growth.
A prenuptial agreement could identify the existing business interest and establish rules for its future treatment. The parties might distinguish Taylor’s premarital ownership from future compensation or other assets accumulated during the marriage.
Detailed disclosure of the business and its approximate value would be important. The agreement should also address future circumstances rather than merely declaring, “The business is mine.”
A Second Marriage with Children from Prior Relationships
Morgan and Casey are both in their fifties and have adult children from previous marriages. Each owns a home and retirement assets.
Their primary concern is not mistrust. They want to build a life together while preserving certain property for their respective children.
A prenuptial agreement can establish financial expectations if the marriage ends and coordinate with thoughtful estate planning. Because divorce rights and inheritance rights are related but not identical, the parties should consider the agreement alongside wills, trusts, beneficiary designations, and other estate documents.
A Prenuptial Agreement Presented Days Before the Wedding
Chris gives Sam a lengthy prenuptial agreement four days before a large wedding. Chris has had an attorney working on it for months. Sam sees it for the first time after family members have traveled to New Hampshire and the couple has already paid substantial wedding expenses.
Signing the agreement close to the wedding does not automatically make it invalid. New Hampshire rejects such a categorical rule.
But timing combined with the lack of meaningful opportunity for independent advice, unexpected terms, pressure, or inadequate disclosure could become important evidence of involuntariness. This is precisely why last-minute agreements create avoidable litigation risk.
An Agreement With Very Different Financial Outcomes
Jamie enters marriage with $4 million in investments. Riley has relatively few assets. Their agreement provides that each keeps premarital property and its appreciation.
Twenty years later, Jamie’s investments are worth substantially more than Riley’s assets.
The disparity alone does not necessarily invalidate the agreement. New Hampshire courts recognize that agreements may intentionally produce unequal outcomes. The analysis would focus on the agreement’s terms, circumstances surrounding execution, disclosures, and whether subsequent developments satisfy the legal standards for nonenforcement.
A Postnuptial Agreement After a Business Changes
Several years into marriage, one spouse starts a company and outside investors require clarity concerning ownership. The spouses want to establish how how they will treat the business without ending their marriage.
A carefully negotiated postnuptial agreement may provide that clarity. Because the parties are already married, however, the legal analysis differs somewhat from a premarital negotiation. Wilber confirms that New Hampshire can recognize postnuptial agreements while emphasizing contractual fairness and the special relationship between spouses.
Fictional Fact Pattern: A Prenuptial Agreement Challenged During Divorce
Consider a fictional couple, Emma and Noah. They marry in New Hampshire when Emma is 34 and Noah is 39.
Noah owns a construction company that he founded eight years before the marriage. The company is worth approximately $1.8 million when the parties become engaged. Emma works in healthcare and has retirement savings of approximately $120,000.
Six months before the wedding, Noah tells Emma that he would like a prenuptial agreement protecting his existing ownership of the company. His attorney prepares a draft four months before the ceremony. Attached schedules identify Noah’s business, real estate, investment accounts, income, and debts, as well as Emma’s major assets.
Emma hires her own attorney. Her attorney proposes several changes, including provisions concerning the marital home and retirement contributions. The parties negotiate for approximately six weeks and sign the final agreement two months before the wedding.
Fifteen years later, they divorce.
Noah’s company is now worth $7 million. Emma argues that enforcing the agreement would be unfair because the business increased dramatically in value during the marriage. She also points out that she assumed greater responsibility for the children during several years when Noah worked long hours expanding the company.
The court would first examine the agreement itself and New Hampshire’s presumption of validity. Emma’s dissatisfaction with the economic result would not, standing alone, invalidate it.
The evidence surrounding execution would likely matter considerably. Noah disclosed the business and its approximate value. Emma had independent counsel. Negotiations occurred over several weeks. She received the proposed agreement months before the wedding and successfully negotiated changes.
Those facts would make a claim of fraud, material nondisclosure, or duress considerably more difficult.
Emma could still argue that circumstances changed so dramatically during the marriage that enforcement would create the type of hardship recognized by New Hampshire law. The court would need to evaluate the actual language of the agreement, what developments were reasonably contemplated, the parties’ circumstances, and the evidence supporting the claimed hardship.
The outcome would not turn simply on whether $7 million is “too much” for Noah to retain. The central question would be whether Emma proved a recognized legal basis for overcoming the agreement’s presumptive validity.
The scenario demonstrates why the drafting process matters so much. Financial schedules, negotiation records, independent counsel, sufficient time, and careful language can become critical evidence many years after everyone has forgotten the details of the original conversation.
Frequently Asked Questions
Do prenuptial agreements hold up in New Hampshire?
Yes, they can. New Hampshire law recognizes written antenuptial agreements, and the state’s appellate decisions state that prenuptial agreements are presumed valid. The spouse challenging one bears the burden of proving a recognized ground for invalidation.
Do both people need separate attorneys?
New Hampshire law does not make the mere absence of separate attorneys automatically dispositive in every case. However, independent legal advice can provide strong evidence that each person understood the agreement and had a meaningful opportunity to evaluate it.
How far before the wedding should we sign?
New Hampshire does not impose a simple rule invalidating every agreement signed within a specified number of days. Nevertheless, the Supreme Court has emphasized the importance of timing and a reasonable opportunity for independent advice and reflection. Starting this process months rather than days before the wedding is a far better practice.
Can a prenuptial agreement determine child custody?
Parents cannot use a prenuptial agreement to eliminate the legal rights of their minor children. RSA 460:2-a expressly prohibits terms attempting to abrogate children’s statutory or common-law rights.
Can we address alimony?
Financial rights between spouses may be addressed in an agreement, but enforceability ultimately depends on the agreement’s terms and applicable New Hampshire law. Parties should draft these provisions carefully with an understanding that circumstances may look very different years later.
Can we change our prenup after marriage?
Potentially. Couples may agree to modify their financial arrangements, but changes made after marriage raise postnuptial agreement considerations. A casual handwritten amendment or verbal understanding can create significant uncertainty.
Are postnuptial agreements valid in New Hampshire?
They can be. In In re Estate of Wilber, the New Hampshire Supreme Court recognized that postnuptial agreements are not prohibited and may be enforceable even though no New Hampshire statute specifically authorizes them.
What if my fiancé will not marry me unless I sign?
That fact alone does not necessarily establish legal duress. New Hampshire courts examine the totality of the circumstances, including timing, wrongful pressure, opportunity for legal advice, disclosure, and whether the party signed the agreement voluntarily.
Can a court invalidate only part of an agreement?
That may depend on the agreement’s language, the challenged provision, and applicable law. Well-drafted agreements often contain severability provisions addressing what happens if a court cannot enforce a particular term.
What financial information should we disclose?
The appropriate disclosure depends on the circumstances, but parties commonly identify significant real estate, bank and investment accounts, retirement assets, business interests, income, and debts. Clear written disclosure can substantially reduce later disagreement about what each person knew.
Final Thoughts
Prenuptial and postnuptial agreements provide valuable financial clarity, but their strength depends on much more than signatures on a document.
New Hampshire courts consider the circumstances surrounding an agreement, including voluntariness, disclosure, fairness, and subsequent changes. Prenuptial agreements carry a presumption of validity, but that presumption can be challenged on recognized legal grounds. Postnuptial agreements can also be enforceable, although they arise within an existing marital relationship and deserve particularly careful treatment.
The best time to address these issues is usually when both people have time to think clearly, exchange meaningful financial information, obtain independent advice, and negotiate without artificial pressure.
A well-designed marital agreement should not merely anticipate divorce. It should give both people a clear understanding of the financial rules they have chosen for their marriage.
About the Author: Damian Turco is the Founder and Managing Partner of Turco Legal and has practiced divorce and family law since 2008.
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This article is for informational purposes only and should not be interpreted as legal advice. Articles on our blog are written at a historical point in time and the information presented accurately reflects the law at the time of the article’s writing. If you’d like to better understand how the law applies to your case, schedule an attorney consultation by calling any of our offices or by clicking the Schedule a Consultation link on this page.