What is the difference between a postnup and a prenup?

The primary difference is timing. A prenuptial agreement is signed before the wedding, while a postnuptial agreement is signed after the marriage has already taken place. Because postnuptial agreements are executed during a marriage where spouses owe each other fiduciary duties, courts apply stricter standards for fairness and disclosure. Additionally, the legal consideration for a prenup is the marriage itself, while postnuptial agreements may need to identify separate consideration such as mutual promises or reconciliation.

Can a postnuptial agreement include an infidelity clause?

Many postnuptial agreements include provisions addressing infidelity, often providing for enhanced property division or spousal support in favor of the faithful spouse if the marriage ends due to infidelity. However, the enforceability of such clauses varies significantly by state. Some courts enforce them as valid contractual provisions, while others decline to enforce them on public policy grounds or because they are difficult to define and prove.

Can we create a postnuptial agreement without getting divorced?

Absolutely. In fact, most postnuptial agreements are created by couples who intend to stay married. The agreement simply defines how financial matters would be handled if the marriage were to end. Many couples use postnuptial agreements as a financial planning tool, to address changed circumstances, or as part of a reconciliation plan. Creating a postnup does not require filing for divorce or separation.

Does a postnup override a prenup?

A properly executed postnuptial agreement can replace or modify a prior prenuptial agreement if both parties agree. The postnup should explicitly state whether it supersedes the prenup entirely or only modifies specific provisions. Both parties should have independent legal counsel review the changes and understand how the new agreement affects their rights under the original prenup.

Postnuptial Agreements Attorneys

Experienced legal representation for postnuptial agreements matters across all 50 states.

Request a Consultation Call: 1-844-6-NWIND-1 (1-844-669-4631)

Reported by 50%+ of family lawyers

Increase in Postnuptial Agreement Requests

Source: American Academy of Matrimonial Lawyers

All 50 states (with varying enforceability standards)

States Recognizing Postnuptial Agreements

Source: American Bar Association, Family Law Section

~60%

Divorce Rate for Second Marriages

Source: U.S. Census Bureau and academic research

About Postnuptial Agreements

A postnuptial agreement is a legally binding contract between spouses that is entered into after the marriage has already taken place. Like a prenuptial agreement, a postnup defines how assets, debts, spousal support, and other financial matters will be handled in the event of divorce, separation, or death. Postnuptial agreements serve the same fundamental purpose as prenuptial agreements but are created during the marriage, often in response to changed circumstances, relationship challenges, or the realization that financial clarity is needed after the wedding has already occurred.

Postnuptial agreements have become increasingly common as more couples recognize the value of financial planning tools within marriage. Common reasons for seeking a postnuptial agreement include situations where the couple did not execute a prenup before marriage and now wishes they had, significant changes in financial circumstances such as a business taking off or receiving a large inheritance, reconciliation after infidelity or a period of separation where one or both spouses want formal assurances, one spouse wanting to become a stay-at-home parent and seeking financial protection for that sacrifice, or the realization that a prior prenuptial agreement is outdated and needs to be replaced.

Postnuptial agreements face somewhat greater judicial scrutiny than prenuptial agreements because of the existing fiduciary relationship between spouses. Courts recognize that married couples owe each other duties of good faith, fair dealing, and full disclosure that are even more demanding than those applicable to unmarried couples negotiating a prenup. As a result, the requirements for enforceability may be stricter, including heightened disclosure requirements, a stronger expectation of fairness, and in some jurisdictions, independent counsel for each party as an absolute requirement rather than just a recommendation.

Why You Need a Postnuptial Agreements Attorney

Postnuptial agreements matter because life and marriages are dynamic. Circumstances change in ways that could not have been anticipated at the time of the wedding, and financial arrangements that seemed adequate or unnecessary when the marriage began may no longer fit the couples situation. A postnuptial agreement allows spouses to proactively address financial issues that have arisen during the marriage rather than waiting for a crisis. For couples who are experiencing marital difficulties, a postnuptial agreement can be part of a reconciliation plan, providing a structured framework that addresses the financial concerns of both spouses and allows them to move forward with greater security. For couples whose financial circumstances have evolved significantly, a postnup ensures that both spouses understand and agree upon how those new assets or obligations will be treated. Without a postnuptial agreement, couples are subject to their states default divorce laws, which may not produce outcomes that either spouse would choose.

Common Postnuptial Agreements Cases

Reconciliation After Infidelity

One of the most common triggers for a postnuptial agreement is reconciliation after one spouse has had an affair. The agreement may include financial consequences for future infidelity, adjustments to property division terms, or other provisions that help the injured spouse feel secure enough to continue the marriage.

Business Growth During Marriage

When a business owned by one spouse grows substantially during the marriage, a postnuptial agreement can define how that business interest will be treated in a divorce, potentially protecting the business from disruption while ensuring the non-owner spouse receives fair compensation.

Stay-at-Home Parent Protection

When one spouse leaves the workforce to care for children, a postnuptial agreement can provide financial protections that recognize the career sacrifice, such as enhanced spousal support provisions or a more favorable property division if the marriage ends.

Replacing an Outdated Prenup

Couples who signed a prenuptial agreement years ago may find that its terms no longer reflect their circumstances. A postnuptial agreement can replace or modify the prenup to better address the couples current financial reality.

Inheritance or Windfall

When one spouse receives a significant inheritance, lottery winnings, or other financial windfall during the marriage, a postnuptial agreement can clarify whether those funds will be treated as separate or marital property.

Debt Protection

If one spouse takes on significant debt during the marriage, such as business loans or investment losses, a postnuptial agreement can protect the other spouses assets from being used to satisfy those obligations in a divorce.

Typical Postnuptial Agreements Case Timeline

Individual Attorney Consultations

1-2 weeks

Each spouse meets with their own attorney to discuss their goals, concerns, and the circumstances driving the need for a postnuptial agreement. The attorneys explain the legal requirements and potential enforceability issues.

Financial Disclosure

2-4 weeks

Both spouses prepare comprehensive financial disclosures listing all assets, debts, income, and business interests. Full and fair disclosure is absolutely essential for enforceability and is subject to heightened scrutiny because the parties are married.

Drafting and Negotiation

3-6 weeks

One partys attorney prepares the initial draft, which is reviewed and negotiated through the attorneys until both sides reach agreement on all terms. The negotiation process should be documented to demonstrate the agreements voluntary nature.

Review and Execution

1-2 weeks

Each spouse reviews the final agreement with their attorney, confirms their understanding and agreement, and signs the document with proper notarization and witnesses as required by state law.

Post-Execution Steps

1 week

Original signed copies are provided to each spouse and their attorneys. Any assets that need to be retitled or transferred pursuant to the agreement are documented and processed.

Know Your Rights

You have the right to propose a postnuptial agreement at any point during the marriage. Your spouse cannot be compelled to agree, but the request itself is not grounds for any legal action.
You have the right to independent legal counsel, and in many states, both parties having their own attorneys is essential for the agreements enforceability.
You have the right to complete financial disclosure from your spouse. Any attempt to hide assets during the postnuptial negotiation process may constitute fraud.
A postnuptial agreement cannot waive child support or predetermine child custody, as courts retain jurisdiction over these matters.
You have the right to revoke or modify a postnuptial agreement at any time with the written consent of both spouses.
Courts apply heightened scrutiny to postnuptial agreements because of the fiduciary duty between spouses, so the agreement must be substantively fair to both parties.

What to Look for in a Postnuptial Agreements Attorney

When selecting an attorney for a postnuptial agreement, each spouse must retain their own independent counsel. This is even more critical than with prenuptial agreements because courts apply heightened scrutiny to contracts between spouses due to the fiduciary duty they owe each other. Look for a family law attorney with experience drafting and negotiating both prenuptial and postnuptial agreements, as well as experience litigating their enforceability. The attorney should understand the specific standards for postnuptial agreements in your state, which may differ from prenuptial agreement standards. They should be able to explain the heightened disclosure and fairness requirements that apply to agreements between spouses. A skilled attorney will draft an agreement that protects your interests while being fair enough to withstand judicial scrutiny if ever challenged.

Questions to Ask Your Postnuptial Agreements Attorney

1How does our state treat postnuptial agreements, and are there any special enforceability requirements compared to prenuptial agreements?
2What level of financial disclosure is required, and how should we document it?
3Can we include provisions about infidelity or other marital conduct, and would they be enforceable?
4How should we address assets that have already been commingled during the marriage?
5Can a postnuptial agreement replace our existing prenuptial agreement entirely?
6What makes a postnuptial agreement more vulnerable to challenge than a prenup, and how can we minimize that risk?

Understanding Postnuptial Agreements Legal Costs

Postnuptial agreement costs are generally comparable to or slightly higher than prenuptial agreements, reflecting the additional complexity and scrutiny involved. Attorney fees for each spouse typically range from $3,000 to $10,000 for a moderately complex agreement. Highly complex agreements involving substantial business interests, multiple properties, or significant negotiation can cost $15,000 to $30,000 or more per side. Because each spouse must have independent counsel, the total cost to the couple is double the individual amount. Additional costs may include financial advisor consultations, business valuations, or asset appraisals needed for full disclosure. Despite the upfront cost, a well-drafted postnuptial agreement can save both spouses tens of thousands of dollars in contested divorce litigation.

Key Legal Terms

Video Resources

These videos are provided for informational purposes only. The attorneys and organizations featured are not affiliated with or endorsed by Northwind Law.

Postnuptial Agreements: What You Need To Know

Cordell & Cordell

Pre and Postnuptial Agreements

Khan Academy

Frequently Asked Questions About Postnuptial Agreements

Yes, postnuptial agreements are recognized in all 50 states, but they face greater judicial scrutiny than prenuptial agreements. For a postnup to be enforceable, it typically must include full and fair financial disclosure, be entered into voluntarily without duress, be substantively fair to both parties, and be properly executed with each party having had the opportunity to consult independent legal counsel. Courts are more likely to invalidate a postnup that leaves one spouse destitute or that was obtained through exploitation of the marital relationship.

Citations & Sources

[1]
A majority of family law attorneys surveyed reported an increase in clients requesting postnuptial agreements, with reconciliation and changed financial circumstances cited as the most common reasons. — American Academy of Matrimonial Lawyers
[2]
All 50 states recognize postnuptial agreements, though enforceability standards vary significantly. Some states apply the same standards as prenuptial agreements, while others impose stricter requirements. — American Bar Association, Family Law Quarterly
[3]
Courts in most jurisdictions apply heightened scrutiny to postnuptial agreements because of the fiduciary relationship between spouses, requiring a showing of fairness, full disclosure, and voluntary execution. — Uniform Law Commission, Uniform Premarital and Marital Agreements Act
[4]
The divorce rate for second marriages in the United States is estimated at approximately 60 percent, making postnuptial agreements particularly relevant for couples in blended families. — U.S. Census Bureau and academic research

Ready to Discuss Your Postnuptial Agreements Case?

Speak with a experienced postnuptial agreements attorney. Free consultations available.

Request a Consultation 1-844-6-NWIND-1 (1-844-669-4631)