Massachusetts Prenup Laws: Guide for Engaged Couples

Getting married in Massachusetts? A prenuptial agreement lets you set clear expectations about property, debt, and (where allowed) support—so you’re not relying only on default state rules.

Key points

  • Prenups are recognized if they’re voluntary, in writing, and signed by both partners.
  • Massachusetts applies a “two-look” test. At execution, the agreement must be fair and reasonable.
  • Massachusetts prenups must be in writing, signed by both parties, and executed voluntarily before the marriage.

Are prenups legal in Massachusetts?

Massachusetts prenups must be in writing, signed by both parties, and executed voluntarily before the marriage. While notarization is not strictly required by statute, it is strongly advised to prove authenticity. Full and fair financial disclosure is expected — either through detailed schedules of assets and liabilities or a clear written waiver. Independent legal counsel is not mandatory but is highly recommended.

What makes a Massachusetts prenup enforceable?

Massachusetts applies a “two-look” test. At execution, the agreement must be fair and reasonable. At enforcement (divorce), it must still be conscionable in light of circumstances. The agreement will not be enforced if it leaves one spouse without sufficient means of support or is unconscionably one-sided at divorce.

What you can—and can’t—include

Parties can waive property rights, inheritance rights, and spousal support. However, provisions affecting child custody or support are unenforceable. Alimony waivers may be set aside if they would leave a spouse unable to support themselves at divorce.

Simple process

Draft and sign well before the wedding to avoid claims of duress. Provide full disclosure, attach asset schedules, and use independent counsel on both sides. Notarize and keep original copies safe.

Next steps

Start your Massachusetts prenup

General information only, not legal advice. Laws and cases change—consider speaking with a local attorney about your situation.

Browse other states in our State Guides hub.

Common Questions:

How do MA courts evaluate a prenup?

They look at fairness when signed and, in some situations, at whether enforcement later would be unconscionable. Good disclosure and counsel matter.

What disclosure should we exchange in Massachusetts?

Attach schedules for assets, debts, and income; include summaries or statements for major items.

Can we address alimony?

Yes—within public‑policy limits. Courts may scrutinize extreme outcomes at enforcement.

What about a family business or partnership interest?

Confirm it as separate, define how profits and appreciation are treated, and plan for any involvement of the other spouse.

Do we need a notary?

Yes—execute before a notary and keep signed copies safe.

Is a postnup an option if we’re short on time?

Yes—Massachusetts recognizes postnuptial agreements; follow similar fairness and disclosure practices.

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