If you and your spouse are considering a postnuptial agreement, commonly referred to as a “postnup,” you’re taking a practical and proactive step. Life changes constantly, prompting a need or desire for a postnup. Changes can include one partner starting a business, receiving an inheritance, taking on significant debt, facing immigration issues, or wanting to protect family property. A postnup lets couples agree, after marriage, how assets, debts, and sometimes support will be handled during the marriage or if it ends. How do I make sure my prenup will be upheld in the future? And, what does Massachusetts require for a valid postnup? Read on to find the answers to your questions and to learn more about postnuptial agreements in Massachusetts.
What is a postnuptial agreement in Massachusetts?
A postnuptial agreement is simply a written contract between spouses created after marriage that allocates property and responsibility for debts, and can address spousal support. Massachusetts treats postnups under general contract and family law principles. Courts evaluate whether the agreement was entered voluntarily, with adequate disclosure, and whether its terms are unconscionable or against public policy. Unlike some states with a single codified premarital agreements statute, Massachusetts relies on a mix of statutory guidance, like provisions of Chapter 208 of the Massachusetts General Law and case law to determine enforceability. So careful drafting and thorough documentation are crucial.
Basic legal requirements and practical drafting tips
There are several steps you should take to help ensure that your postnuptial agreement is enforceable and valid in a court of law. In addition to the contract’s terms being clear and unambiguous, here are a few legal requirements you must follow:
- A postnup must be in writing and signed. Both spouses must sign the agreement. Writing is critical as verbal deals are unreliable and hard to prove.
- Full and fair financial disclosure is essential. This is central to a valid prenup. Attach schedules that list assets, debts, income, and recent tax returns or account statements. Courts closely scrutinize whether both spouses understood what they were signing.
- Voluntary signatures is a must. Voluntariness matters. Avoid pressure, unfair timing, or last‑minute demands. Give each spouse time to review and consult counsel.
- The terms cannot be unconscionable. An extremely one‑sided agreement entered into under duress or without disclosure can be invalidated.
It’s also highly advisable to sign the postnup in front of a notary to increase authentication. And, both parties should consider hiring separate attorneys. These steps help prove that the signatures were voluntary and that both parties fully understood the consequences of what they were signing.
Why would I even need a postnup in Massachusetts?
Postnups aren’t just for the wealthy. They’re helpful when life changes create new financial realities. If one spouse starts a business, a postnup can define how that business will be treated on divorce and protect premarital investments. If a spouse inherits family property, a postnup can preserve that inheritance as separate property. Couples facing immigration timing may want clear financial arrangements that won’t undermine a marriage‑based petition. Postnups can also allocate responsibility for student loans, protect a family home, or set expectations for spousal support to avoid costly litigation later.
Another important reason to have a postnup in Massachusetts, is because in a divorce, property is divided through the priniple of equitable distribution. This means that a court won’t necessarily divide the property equally, but will look closely at the circumstances of the marriage and the treatment of assets in order to determine what distribution is most fair. It’s very likely in a Massachusetts divorce, a judge will made decisions regarding property that do not align with either spouse’s true wishes. A clear, unambiguous agreement reduces uncertainty and keeps both spouses in the driver’s seat when it comes to their property.
Can I draft my own postnup?
Yes, you can draft your own, but be cautious. Online templates may provide a starting point, but they often overlook state-specific requirements, lack detailed disclosure schedules, and fail to anticipate complex issues such as business valuation or tax consequences. DIY postnups are more vulnerable to attack later on, especially if the other spouse claims they didn’t understand the terms or weren’t told about key assets. If you’re set on using an online DIY template, make sure that your provider provides a state-specific template and asks pointed and detailed questions that get to the heart of what matters most to you and your partner. Whether you draft your postnup yourself or use an online template, you should seriously consider consulting a family law attorney experienced in postnups.

Can we share a postnup attorney?
Sharing a single attorney for both spouses is generally not recommended. In Massachusetts, as elsewhere, an attorney representing both parties creates a conflict of interest. Each spouse needs independent advice about legal rights, tax implications, and long‑term consequences. Courts may look skeptically on agreements created under shared counsel, especially if a dispute arises later, because it can undermine the appearance of voluntariness and informed consent. Best practice is for each spouse to be advised of the right to independent counsel. If one spouse declines legal advise after being advised to seek it, document the their decision to waive legal representation in writing to reduce later challenges.
Where can I find a postnup lawyer in Massachusetts?
Start by asking trusted friends and family for referrals in your area. If you’re spending money on an attorney, make sure they have experience in drafting marital agreements and in how to handle divorce and support matters. Also, check with the Massachusetts Bar Association referral service, local county bar lists, and trusted lawyer directories. Read reviews for a prospective attorney. And when interviewing a lawyer, ask about their experience with postnuptial agreements, how they handle financial disclosure and valuations, and whether they coordinate with tax, estate, or business counsel when needed. Another important question to ask a prospective attorney is how they charge for postnup services. You want to make sure you have a clear understanding of their fees and that you won’t be hit with hidden fees.
The bottom line on what’s required for a valid postnup in Massachusetts
A Massachusetts postnuptial agreement is an effective tool for creating a roadmap for the future. When drafted thoughtfully, with clear disclosure and independent advice, a postnup reduces future conflict, protects family interests, and brings peace of mind to both spouses. Because Massachusetts courts pay close attention to voluntariness and fairness, consult an experienced attorney to ensure your agreement reflects your goals and will hold up if tested in court. If you’re considering entering into a postnup, sit down with your spouse and have these important conversations now. Drafting and signing a postnuptial agreement should be a collaborative process that encourages transparency and can end with you both being on the same page and at ease about the future.

Nicole Sheehey is the Head of Legal Content at HelloPrenup, and an Illinois licensed attorney. She has a wealth of knowledge and experience when it comes to prenuptial agreements. Nicole has Juris Doctor from John Marshall Law School. She has a deep understanding of the legal and financial implications of prenuptial agreements, and enjoys writing and collaborating with other attorneys on the nuances of the law. Nicole is passionate about helping couples locate the information they need when it comes to prenuptial agreements. You can reach Nicole here: Nicole@Helloprenup.com

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