Postnuptial Agreement Guidance - Gastelum Attorneys

Reviewed by Jennifer Setters, J.D. — Managing Attorney, Gastelum Attorneys | Nevada Bar No. 13126 | Boyd School of Law, UNLV

What is a postnuptial agreement in Nevada?

A postnuptial agreement is a legally binding written contract between spouses that is signed after the marriage has already taken place. In Nevada, postnuptial agreements are recognized under NRS 123.070 and general contract law principles. Like a prenuptial agreement, a postnuptial agreement can define how assets, debts, and financial responsibilities will be divided if the marriage ends in divorce or death — overriding Nevada’s default community property rules under NRS 125.150. Unlike a prenup, a postnuptial agreement can also address circumstances that arose during the marriage — a new business, a large inheritance, a significant income change, or a reconciliation after a period of separation.

Key Takeaways

Nevada recognizes postnuptial agreements under NRS 123.070 and general contract law. They must be voluntary, supported by consideration, in writing, and not unconscionable to be enforceable.
A postnuptial agreement can protect a business started during the marriage, define how an inheritance is classified, establish spousal support terms, and separate individual debt liability — all things a prenup cannot address after the fact.
Nevada courts scrutinize postnuptial agreements more closely than prenups because they are executed within an existing fiduciary relationship. Full financial disclosure and independent legal counsel for each party are essential to enforceability.
A postnuptial agreement cannot predetermine child custody or waive child support — those decisions belong to Nevada courts at the time of divorce under NRS 125C.0035.
Without a postnuptial agreement, Nevada’s community property rules under NRS 125.150 apply — all assets and debts acquired during the marriage are presumed to be equally owned by both spouses.
A postnuptial agreement is one of the most effective mid-marriage protections available to business owners who did not execute a prenup — particularly in Las Vegas, where many businesses are founded or scaled during marriage.

This page is for you if:

You are already married and want to protect assets, a business, or an inheritance that you did not address in a prenuptial agreement
Your financial circumstances have changed significantly since marriage — a new business, major income shift, or a large inheritance — and you want those changes reflected in a binding agreement
You and your spouse are in a period of reconciliation and want to establish clear financial boundaries going forward
You are a business owner who started or significantly grew a company during the marriage and want to limit your spouse’s community property claim
You want to protect assets intended for children from a prior marriage without disrupting your current marriage
Your spouse has accumulated significant debt during the marriage and you want to formally separate financial liability

Gastelum Attorneys drafts and reviews postnuptial agreements for married clients throughout Las Vegas, Henderson, and North Las Vegas. Our six-attorney Nevada family law team has handled more than 5,000 Clark County cases since 2018, including high net worth divorces where the enforceability of marital agreements — and the consequences of not having them — determined the outcome of the case.

Call (702) 979-1455 to speak with a Las Vegas postnuptial agreement attorney. Same-week consultations available.

New Beginnings, Brighter Tomorrows.

Postnuptial Agreement vs. Prenuptial Agreement — Key Differences

Feature	Prenuptial Agreement	Postnuptial Agreement
When signed	Before marriage	After marriage — any time during the marriage
Governing law	NRS 123A (Uniform Premarital Agreement Act)	NRS 123.070 and general contract law
Court scrutiny level	Standard — parties not yet in fiduciary relationship	Higher — spouses owe fiduciary duties to each other; courts examine fairness more closely
Can address mid-marriage events	No — limited to circumstances at time of signing	Yes — can address business growth, new inheritance, debt accumulation, changed income
Consideration required	Marriage itself is consideration	Must include separate consideration — something of value exchanged beyond the existing marriage
Common uses	Protecting premarital assets, business interests, debt separation before marriage	Protecting business started during marriage, post-marriage inheritance, reconciliation terms, mid-marriage financial restructuring

What Can a Postnuptial Agreement Cover in Nevada?

Nevada postnuptial agreements can address a wide range of financial matters, subject to the same limits that apply to prenuptial agreements. Under Nevada law, a postnuptial agreement can cover:

Property characterization. Reclassify community property as separate property, or define how future assets acquired during the marriage will be characterized. For example, an agreement can specify that business growth after a certain date belongs solely to the business-owner spouse as separate property under NRS 123.130.
Division of assets in divorce. Specify how real estate, bank accounts, investment portfolios, retirement accounts, and business interests will be divided if the marriage ends — overriding Nevada’s default 50/50 community property division under NRS 125.150.
Debt responsibility. Assign responsibility for debts incurred during the marriage, protecting one spouse from the other’s business loans, credit card debt, or personal liabilities.
Spousal support (alimony). Establish whether spousal support will be paid upon divorce, in what amount, and for how long. Use our Nevada alimony calculator to model exposure before drafting these terms.
Business interests. Define the business-owner spouse’s interest as separate property and limit the community property claim to earnings already divided through salary. For business owners, this is frequently the most valuable provision. See our business valuation in Nevada divorce guide for how Nevada courts value businesses without an agreement.
Inheritance protection. Ensure that an inheritance received during the marriage — or expected in the future — is classified as separate property not subject to division.
Children from prior marriages. Protect assets intended to pass to children from a prior relationship, ensuring those assets remain outside the community estate.
Retirement accounts. Define how retirement accounts accumulated during the marriage will be divided — or protected — in the event of divorce. For QDRO mechanics when no agreement exists, see our Nevada QDRO divorce guide.

What Cannot Be Included in a Nevada Postnuptial Agreement?

Child custody. A postnuptial agreement cannot predetermine custody arrangements. Nevada courts decide custody at the time of divorce based solely on the best interest of the child under NRS 125C.0035. See our child custody lawyer Las Vegas page for how Nevada family courts make these determinations.
Child support. Child support belongs to the child, not the parents. A postnuptial agreement cannot waive or limit child support obligations. Nevada courts calculate support using the statutory formula under NRS 125B.070.
Unconscionable terms. A court may refuse to enforce a postnuptial agreement, or specific provisions within it, if enforcement would be fundamentally unfair at the time enforcement is sought.
Terms that encourage divorce. Provisions that create a financial incentive for one spouse to initiate divorce — such as a large payment triggered by filing — may be found to violate public policy and be declared unenforceable.
Illegal terms. Any provision that violates Nevada law or public policy is void.

Are Postnuptial Agreements Enforceable in Nevada?

Yes — Nevada courts recognize and enforce postnuptial agreements, but they apply greater scrutiny to them than to prenuptial agreements. The reason is the existing fiduciary relationship between spouses: married parties owe each other duties of good faith and fair dealing that do not exist between parties to a prenuptial agreement who are not yet married.

To be enforceable in Nevada, a postnuptial agreement must satisfy these requirements:

In writing and signed by both parties. Oral postnuptial agreements are not enforceable in Nevada.
Voluntary. Both spouses must enter the agreement freely, without duress, coercion, or undue influence. An agreement presented during a period of marital crisis — when one spouse is particularly vulnerable — is at elevated risk of challenge on voluntariness grounds.
Full financial disclosure. Both parties must fully disclose their assets, debts, income, and liabilities. Failure to disclose significant assets is grounds to void the agreement. The disclosure standard mirrors the obligations imposed in divorce proceedings under NRCP 16.2.
Supported by consideration. Unlike a prenuptial agreement — where marriage itself is consideration — a postnuptial agreement executed during an existing marriage requires separate consideration: something of value exchanged between the parties beyond the marriage that already exists. Courts examine whether genuine mutual consideration was present.
Not unconscionable. The terms must not be so one-sided that enforcement would be fundamentally unjust. Unconscionability is evaluated at the time enforcement is sought — a postnuptial agreement that seemed fair when signed may be challenged if circumstances changed dramatically.
Independent legal counsel for each party. Nevada does not legally require each spouse to have their own attorney, but courts give substantially more weight to postnuptial agreements where both parties had independent legal advice. Without it, the agreement is vulnerable to challenge on the grounds that one spouse did not fully understand what they were agreeing to.

Important: Because postnuptial agreements are executed within an existing fiduciary relationship, Nevada courts examine them more critically than prenuptial agreements. An agreement that was “close enough” before marriage may fail after marriage. The enforceability requirements above are not aspirational — they are the checklist courts use when one spouse seeks to void an agreement. Every element must be present and documented.

Common Situations That Trigger Postnuptial Agreements in Nevada

One Spouse Starts or Acquires a Business During the Marriage

A business founded during the marriage with marital funds and marital labor is community property under NRS 125.150 — subject to equal division if the marriage ends. A postnuptial agreement can designate the business as the owner-spouse’s separate property going forward, limit the community property claim to a fixed dollar amount or percentage, and establish a buyout formula that prevents a contested business valuation dispute in a future divorce. This is one of the most common and financially significant postnuptial scenarios in Las Vegas, where businesses are routinely founded and scaled during marriages. For a complete guide to how Nevada courts value businesses without an agreement, see our business valuation in Nevada divorce page.

Receiving a Large Inheritance or Gift

An inheritance received during the marriage is separate property under NRS 123.130 — but only if it is kept separate from community funds. A postnuptial agreement can formally document the inherited asset’s separate character, establish how the inheritance will be invested or used going forward, and specify that any growth attributable to the inheritance remains separate property. This is particularly important for anticipated inheritances — a postnuptial agreement executed before the inheritance is received establishes intent and protects the asset from the moment it arrives.

Significant Change in Income or Financial Status

When one spouse’s income increases dramatically — a major career advancement, a business becoming highly profitable, or a substantial equity event — the income disparity between spouses creates potential spousal support exposure in a future divorce. A postnuptial agreement can establish agreed-upon spousal support terms in advance, providing both spouses with certainty and limiting litigation risk. This protects the higher-earning spouse while ensuring the lower-earning spouse has defined, enforceable rights.

One Spouse Accumulates Significant Debt

Debt incurred during the marriage is presumed to be community debt — both spouses may be liable. When one spouse starts a business that takes on significant debt, or accumulates personal liabilities the other spouse did not know about, a postnuptial agreement can formally separate debt responsibility — protecting the non-debtor spouse from obligations that are not theirs. For cases involving suspected financial concealment, see our hidden assets in Nevada divorce guide.

Reconciliation After a Period of Separation

When spouses reconcile after separating — particularly in cases where divorce proceedings were initiated and then discontinued — a postnuptial agreement can establish the financial terms of the reconciliation, define how assets accumulated during the separation period are characterized, and provide both parties with clarity about their financial rights going forward. Courts recognize reconciliation as a valid consideration for a postnuptial agreement.

Protecting Assets Intended for Children From a Prior Marriage

In second marriages where one or both spouses have children from prior relationships, a postnuptial agreement can designate specific assets as separate property intended to pass to those children — ensuring that blended family inheritance does not become a community property dispute if the marriage ends.

How to Make a Nevada Postnuptial Agreement Enforceable

Start with complete financial disclosure from both parties. Attach a detailed financial schedule to the agreement listing all assets, debts, income, and liabilities for each spouse. This is not optional — it is the foundation of enforceability. Courts void postnuptial agreements where one spouse concealed significant assets during the process.
Both parties should retain independent legal counsel. Each spouse should have their own attorney review and explain the agreement before signing. This is the single most important step to prevent a successful challenge. An agreement reviewed only by the drafting attorney — who represents one spouse — is inherently vulnerable to challenge by the other.
Identify and document the consideration. Unlike a prenup, a postnuptial agreement requires consideration beyond the existing marriage. The agreement should clearly state what each party is giving and receiving in exchange for the other’s agreement. Consideration can take many forms — a promise not to pursue a business interest claim, a commitment to fund a life insurance policy, or mutual agreement on specified financial terms — but it must be present and documented.
Ensure neither party is signing under pressure. Do not present the agreement during a period of marital crisis, immediately following a significant financial event, or at a moment when one spouse is emotionally vulnerable. Courts look closely at the circumstances surrounding execution. Document the timeline — when the agreement was first proposed, how much time each party had to review it, and when it was signed.
Have the agreement notarized and witnessed. Nevada does not legally require notarization for a postnuptial agreement, but notarization provides additional evidence that both parties signed voluntarily and understood the document’s significance.
Store the agreement properly. Keep the original in a secure location. Provide certified copies to both spouses and their attorneys. Consider including a reference to the agreement in your estate planning documents.

How Much Does a Postnuptial Agreement Cost in Nevada?

Complexity	Typical Cost Per Party	Common Situations
Simple	$1,500–$3,500	Straightforward property reclassification, debt separation, or basic inheritance protection
Moderate	$3,500–$7,000	Business protection, real estate characterization, spousal support terms, inherited assets
Complex	$7,000–$15,000+	Business valuation required, multiple asset classes, significant income disparity, contested terms requiring negotiation

Each spouse should retain independent legal counsel — meaning total cost covers both attorneys. Postnuptial agreements involving business interests may require a preliminary business valuation to establish a baseline value, which is a separate cost. The cost of a postnuptial agreement is substantially less than contested high net worth property division in a litigated divorce — which can run $50,000–$150,000 or more.

Postnuptial agreements are typically more expensive than prenuptial agreements of equivalent complexity because Nevada courts subject them to greater scrutiny, requiring more rigorous documentation of disclosure, consideration, and voluntariness.

Postnuptial Agreements and Asset Protection

A postnuptial agreement is one of several legal tools available to protect assets in a Nevada marriage. It works in conjunction with — not as a replacement for — other protective strategies: proper titling of separate property, documented separate property records, and appropriate business entity structure.

For a complete guide to all asset protection strategies available in Nevada — before, during, and after a divorce filing — see our how to protect assets in a Nevada divorce page. For couples who did not execute a prenuptial agreement and want to understand the full range of options, see our Nevada prenuptial agreement page for a comparison of what prenups and postnups can accomplish.

Why Choose Gastelum Attorneys for Your Nevada Postnuptial Agreement

Six Nevada family law attorneys. 5,000+ Clark County cases since 2018. Bilingual English and Spanish.

Gastelum Attorneys drafts postnuptial agreements from the perspective of attorneys who litigate the enforceability of marital agreements in Clark County Family Court. We know which provisions survive challenge, which disclosure practices courts scrutinize, and how to structure consideration to withstand the heightened review Nevada courts apply to post-marriage agreements.

We represent both the spouse proposing the agreement and the spouse reviewing one presented to them. If your spouse — or their attorney — has proposed a postnuptial agreement, independent review by Gastelum Attorneys before you sign protects your rights and ensures you fully understand what you are agreeing to.

Our bilingual team serves clients in English and Spanish throughout Las Vegas, Henderson (see our Henderson divorce lawyer page), and North Las Vegas.

Jennifer Setters, J.D. — Managing Attorney. Licensed by the State Bar of Nevada (Bar No. 13126). William S. Boyd School of Law, UNLV. Exclusive practice in Nevada family law since 2018.

718 S 8th Street, Las Vegas, NV 89101 · Monday–Friday, 9:00 AM–5:00 PM · (702) 979-1455

Frequently Asked Questions — Postnuptial Agreements in Nevada

What is a postnuptial agreement?

A postnuptial agreement is a legally binding written contract between spouses executed after the marriage has taken place. It defines how assets, debts, and financial responsibilities will be managed during the marriage and divided if the marriage ends in divorce or death. In Nevada, postnuptial agreements are recognized under NRS 123.070 and general contract law principles.

Are postnuptial agreements enforceable in Nevada?

Yes, with conditions. Nevada courts enforce postnuptial agreements that are voluntary, in writing, supported by consideration, backed by full financial disclosure from both parties, and not unconscionable. Courts apply greater scrutiny to postnuptial agreements than to prenuptial agreements because spouses owe each other fiduciary duties. Independent legal counsel for each party significantly strengthens enforceability.

What is the difference between a prenuptial and postnuptial agreement in Nevada?

A prenuptial agreement is signed before marriage and is governed by NRS 123A. A postnuptial agreement is signed after marriage and is governed by NRS 123.070 and general contract law. Postnuptial agreements require separate consideration and face greater court scrutiny. They can address circumstances that arose during the marriage — like a new business or inheritance — that a prenup cannot.

Can a postnuptial agreement protect my business in Nevada?

Yes. A postnuptial agreement can designate a business started during the marriage as the owner-spouse’s separate property, limit the other spouse’s community property claim, and establish a buyout formula. Without an agreement, a business grown during the marriage using marital funds or labor is community property under NRS 125.150. See our business valuation in Nevada divorce guide for what happens without protection.

Can a postnuptial agreement be challenged in Nevada?

Yes. A postnuptial agreement can be challenged on grounds of lack of voluntariness, insufficient financial disclosure, absence of consideration, unconscionability, or improper execution. The party challenging the agreement bears the burden of proving one of these grounds. Agreements with full financial disclosure, independent counsel for each party, and clearly documented consideration are substantially harder to overturn.

Does a postnuptial agreement require notarization in Nevada?

Nevada does not legally require notarization for a postnuptial agreement to be valid. The agreement must be in writing and signed by both parties. However, notarization and witness signatures are strongly recommended — they provide documented evidence that both parties signed voluntarily and understood the agreement, which is particularly important given the heightened scrutiny Nevada courts apply to post-marriage agreements.

How long does it take to draft a postnuptial agreement in Nevada?

A straightforward postnuptial agreement can be drafted and finalized in 2–4 weeks when both parties are cooperative and financial disclosure is complete. More complex agreements — involving business interests, multiple asset classes, or significant income disparity requiring negotiation — typically take 4–8 weeks. The timeline is driven by the completeness of financial disclosure and the speed of review by each party’s independent counsel.

Can we modify a postnuptial agreement after signing it?

Yes. A postnuptial agreement can be amended or revoked by mutual written agreement of both spouses at any time during the marriage. Any modification must meet the same enforceability requirements as the original agreement — it must be voluntary, in writing, supported by disclosure, and backed by consideration. Circumstances change over the course of a marriage, and postnuptial agreements should be reviewed periodically — particularly after significant financial events — to ensure they still reflect the parties’ intentions.

Reviewed By

Jennifer Setters, J.D.
Managing Attorney, Gastelum Attorneys
State Bar of Nevada — Bar No. 13126
William S. Boyd School of Law, UNLV — J.D.
University of Nevada, Las Vegas — B.A., Criminal Justice
Practice: Nevada Family Law — Exclusively since 2018

Postnuptial Agreement Nevada | Las Vegas | Gastelum Attorneys