What a Prenuptial Agreement Actually Does Under Michigan Law
A prenuptial agreement – sometimes called an antenuptial agreement in Michigan statutes – is a contract signed before marriage that governs how certain financial matters will be handled if the marriage ends or if one spouse dies. It is not a document that predicts divorce. It is a document that removes uncertainty.
Under MCL 557.28, Michigan courts will enforce a prenuptial agreement if it meets the following criteria:
It was entered into voluntarily and without fraud, duress, or coercion.
Both parties had full and fair disclosure of each other’s financial assets and liabilities.
The agreement was not unconscionable – meaning it was not grossly one-sided when it was signed.
It does not promote or encourage divorce.
That last point matters more than most people realize. Michigan courts have struck down provisions that create financial incentives to end a marriage. An experienced attorney knows how to structure spousal support and asset terms so they reflect planning for the future – not a reward for walking out.
Common provisions in a well-drafted prenuptial agreement include: designation of separate property (assets owned before marriage or received as gifts or inheritance), handling of debts each party brings to the marriage, spousal support terms or waivers, protection of family businesses or professional practices, and estate planning coordination for children from prior relationships.
Postnuptial Agreements: When Circumstances Change After the Wedding
Not every couple knows what they own when they get married. A postnuptial agreement addresses the same core issues as a prenuptial, but is signed after the wedding – sometimes years or decades later.
Life creates new financial realities. One spouse starts a business, the couple receives a significant inheritance, and a real estate portfolio grows substantially. A partner steps back from a career to raise children, which can create ambiguity about how assets will be divided if the marriage ends. A postnuptial agreement replaces this ambiguity with a clear, negotiated framework.
Postnuptial agreements in Michigan are governed by the same enforceability standards that apply to prenups: voluntariness, full disclosure, and fairness. Courts look closely at whether both spouses have independent legal counsel – and if one does not, they scrutinize the terms more carefully. That is why we strongly recommend that each party retains separate counsel when negotiating a post-nup. This protects both spouses and significantly strengthens the enforceability of the document.
Postnuptial Agreements: When Circumstances Change After the Wedding
Business owners in Novi face a specific risk that standard financial planning does not address. Without a prenuptial agreement, a business built before or during marriage may be subject to equitable distribution in divorce. Michigan courts divide marital property, not separate property, but courts can characterize business appreciation differently depending on contributions made during marriage.
A prenuptial or postnuptial agreement can specify that business and its growth remains separate property. This is especially important if there are partners, investors or employees whose interests may be affected by divorce proceedings. Addressing this issue in advance – before any conflict occurs – is far cleaner than trying to value the business during a divorce case.
The same logic applies to professional licenses, equity compensation, stock options, and commercial real estate holdings. These assets can be difficult to value and even harder to divide without disruption. A marital agreement defines the terms before anyone is emotionally invested in a particular outcome.
Spousal Support Terms: Setting Expectations Before They Become Disputes
Spousal support – what Michigan law calls alimony – is one of the most controversial issues in divorce. Courts weigh many factors under MCL 552.23, including the length of the marriage, both parties’ earnings, standard of living and contributions to the household. The outcome can be unpredictable.
A marital agreement can remove that uncertainty from the table. Couples can agree in advance on whether spousal support will be paid, how it will be calculated, how long it will last, and under what circumstances it might be modified or terminated. For couples where one spouse plans to leave the workforce – whether to raise children or support the other’s career – this kind of provision protects the spouse who makes that financial sacrifice.
Waiver of spousal support is also possible under Michigan law, but courts can set aside a waiver provision if enforcing it would leave one spouse in a financially devastating position. We draft these provisions carefully, keeping that review standard in mind.
How Michigan Courts Evaluate These Agreements – and What Can Go Wrong
Even a sincerely negotiated agreement can be subject to judicial review if there are procedural problems. Here are some of the most common issues that can lead to a challenge:
One party may have failed to disclose significant assets. Financial disclosure is taken seriously by courts, and an agreement without a full understanding of both parties’ financial situation can be vulnerable.
The agreement may have been signed too close to the wedding date, raising concerns that one party felt pressure to sign or did not have enough time to review the document with an attorney.
Only one attorney may have been involved in drafting and reviewing the agreement, raising questions about whether the interests of both parties were truly protected.
The terms of the agreement may be unconscionable, leaving one spouse with almost nothing, especially after a long marriage, and these provisions may be invalidated even if they were technically voluntary.
Protecting Children From Prior Relationships
For blended families, prenuptial and postnuptial agreements can serve as essential estate planning tools. If you have children from a previous marriage or relationship, you may want to ensure that specific assets – real estate, savings, heirlooms, and investment accounts – remain available for the inheritance of your children regardless of what happens to your marriage.
Without a marital agreement, divorce can cause real tension between the intentions of the parents for their children and the equitable distribution of assets that Michigan’s laws would otherwise provide. Defining property rights clearly in writing before a dispute occurs is one of the best ways to protect the financial future of your children.
These agreements closely coordinate with estate planning. We often recommend that clients who are working on prenups or postnups also review or update their wills and beneficiary designations, so that all the documents work together as a coherent plan.
Working With Melissa Pearce & Associates in Novi
Our office serves Novi residents and the wider Oakland County community. We handle divorce, legal separation, and the full range of family law matters – but prenuptial and postnuptial agreements occupy a distinct place in our practice. They are one of the few areas where we can genuinely help clients avoid litigation rather than simply navigating it.
Our process is straightforward. We start with a consultation to understand your assets, your goals, and what you want the agreement to accomplish. We explain what Michigan law permits, what courts scrutinize, and where provisions tend to create problems. Then we draft an agreement that reflects both parties’ interests as clearly and fairly as possible.
Do you have questions about how a postnuptial agreement will interact with your existing estate plan, or concerns about a business that you own with a partner outside of marriage? These are the types of conversations we are here to help you with during our initial consultation. It’s better to address these issues now than to let them become contentious later.
Ready to Protect Your Family’s Financial Future?
Melissa Pearce & Associates, PLC helps Novi couples create prenuptial and postnuptial agreements that hold up when it matters. Schedule a confidential consultation with us today to discuss your options and get the information you need to make an informed decision.

