PrenupsAI

MA · Manually written guide

Prenup laws in Massachusetts

Massachusetts combines a statutory written-contract authorization with Supreme Judicial Court authority addressing voluntariness, disclosure, counsel, and fairness.Mass. Gen. Laws ch. 209, § 25DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

The DeMatteo source points to review at both execution and enforcement, so a historical signing file and current circumstances can both matter.DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Evidence tiersection verified
Package versionma-2026-07-23.3
Authorities24
Reviewed2026-07-23
Effective through2026-07-23
On this pageExecutionSubjects and limitsFinancial reviewExamplesQuestionsAuthorities

Formation and lifecycle

Execution requirements to investigate

formalities

Massachusetts premarital property-contract authorization

Before marriage, parties may make a written contract concerning property or rights of action held when marriage occurs; its limitations take effect upon marriage as if in a deed.

Mass. Gen. Laws ch. 209, § 25
effective date

Massachusetts enforcement-time conscionability review

Changed circumstances may make enforcement unconscionable if they leave a spouse without sufficient property, maintenance, or employment capacity for self-support.

DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)
effective date

Massachusetts statutory effect at marriage

For a qualifying written property contract, limitations upon property rights take effect when marriage occurs as if contained in a deed.

Mass. Gen. Laws ch. 209, § 25

What the agreement addresses

Permitted subjects and legal limits

property

Massachusetts property schedule and recording rule

A clearly descriptive property schedule must be annexed, and the contract and schedule recorded before marriage or within ninety days afterward in the specified registry and where affected land lies.

Mass. Gen. Laws ch. 209, § 26
permitted subjects

Massachusetts recognition of divorce-related premarital settlements

Massachusetts recognizes premarital settlement of divorce-related property and spousal-support consequences, subject to validity, conscionability, and nonwaivable limits.

Osborne v. Osborne, 384 Mass. 591, 428 N.E.2d 810 (1981)
child support

Massachusetts custody and best-interest boundary

Courts retain authority over custody, care, maintenance, and education of minor children under child-focused standards and continuing modification power.

Mass. Gen. Laws ch. 208, § 28
child support

Massachusetts child-support guideline boundary

Child-support orders follow current law and the guideline presumption, subject to lawful deviation findings rather than a prospective private waiver.

Mass. Gen. Laws ch. 208, § 28
child support

Massachusetts postjudgment child-support agreement limit

A postjudgment child-support agreement cannot bar modification without statutory findings, including guideline consistency and the child's best interests.

Mass. Gen. Laws ch. 119A, § 13

Process evidence

Financial disclosure, voluntariness, counsel, and timing

Hypotheticals, not outcomes

Practical examples

These examples show how document facts can intersect with the cited sources. They do not predict a court result.

Example 01

The old agreement, new circumstances

An agreement was signed decades ago and current finances look very different. The cited Massachusetts framework calls for counsel to distinguish circumstances at execution from circumstances at enforcement.DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Ask local counsel

What evidence is relevant at each stage of the current Massachusetts review?

Common starting points

Massachusetts prenup FAQs

Answers are deliberately scoped to the cited evidence package and should be checked against current law.

Does Massachusetts require a written agreement?

Massachusetts General Laws chapter 209, section 25 authorizes a written contract made before marriage concerning property rights.Mass. Gen. Laws ch. 209, § 25

Why are present circumstances relevant?

The cited DeMatteo authority discusses fairness at execution and at enforcement.DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Is the statute alone enough for review?

No. The package identifies Massachusetts appellate authority as essential to the validity and enforcement analysis.Mass. Gen. Laws ch. 209, § 25DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Prepare for independent advice

Questions for a Massachusetts lawyer

Bring the agreement, every exhibit, prior drafts, disclosure records, and a signing timeline. Then use the source-linked questions as an interview guide.

  1. 01

    Is the complete property arrangement written, and which interests does it identify?Mass. Gen. Laws ch. 209, § 25

  2. 02

    Does section 26 govern, and was the complete instrument timely recorded in every required registry?Mass. Gen. Laws ch. 209, § 26

  3. 03

    Which property or support consequence does each clause address?Osborne v. Osborne, 384 Mass. 591, 428 N.E.2d 810 (1981)

  4. 04

    What evidence satisfies each distinct stage of DeMatteo review?DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

  5. 05

    What was disclosed or actually known before the specific waiver?Rosenberg v. Lipnick, 377 Mass. 666, 389 N.E.2d 385 (1979)

  6. 06

    Did either party exploit trust, superior knowledge, or control of drafting and disclosure?Rosenberg v. Lipnick, 377 Mass. 666, 389 N.E.2d 385 (1979)

  7. 07

    Was the agreement fair and reasonable under the complete execution circumstances?DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

  8. 08

    What conflict-free representation or meaningful opportunity for it did each party receive?DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

  9. 09

    What does the complete drafting-to-wedding timeline show?DeMatteo v. DeMatteo, 436 Mass. 18 (2002); Austin v. Austin, 445 Mass. 601 (2005)

  10. 10

    Which exact default-law right does each operative clause waive?Rosenberg v. Lipnick, 377 Mass. 666 (1979); DeMatteo v. DeMatteo, 436 Mass. 18 (2002)

  11. 11

    What changed during marriage, and what resources remain after enforcement?DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

  12. 12

    Would enforcement create public dependency or conflict with a child-focused determination?DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

  13. 13

    Did later conduct defeat an expected benefit or leave a spouse unable to self-support?Rudnick v. Rudnick, 102 Mass. App. Ct. 467, 285 N.E.3d 857 (2023)

  14. 14

    What resources would the resisting spouse retain under the agreement?Austin v. Austin, 445 Mass. 601, 839 N.E.2d 837 (2005)

  15. 15

    What does the complete instrument cover when read as a whole?DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

  16. 16

    What act or instrument allegedly changed or superseded the agreement?DeMatteo v. DeMatteo, 436 Mass. 18 (2002); Mass. Gen. Laws ch. 209, §§ 25–26

  17. 17

    Did the contemplated marriage occur, and which property limitations became effective?Mass. Gen. Laws ch. 209, § 25

  18. 18

    Does any term attempt to bind a future child-focused determination?Mass. Gen. Laws ch. 208, § 28

  19. 19

    Would the term satisfy the current guideline calculation and required findings?Mass. Gen. Laws ch. 208, § 28

  20. 20

    Does a later child-support agreement satisfy every section 13 finding?Mass. Gen. Laws ch. 119A, § 13

  21. 21

    Does a fee term attempt to prevent meaningful validity litigation or override court authority?DeMatteo v. DeMatteo, 436 Mass. 18 (2002); Mass. Gen. Laws ch. 208, §§ 17, 38

  22. 22

    Does the death-triggered language clearly reach the property and benefit claimed?Matter of the Estate of Stacy, 96 Mass. App. Ct. 447, 136 N.E.3d 486 (2019)

  23. 23

    Was the agreement executed before or after Rosenberg's prospective line?Rosenberg v. Lipnick, 377 Mass. 666, 389 N.E.2d 385 (1979)

  24. 24

    Which law governed each instrument when executed?Mass. Gen. Laws ch. 209, §§ 25–26; DeMatteo v. DeMatteo, 436 Mass. 18 (2002)

Inspect the evidence

Principal statutes and cases

Every citation label above resolves to one of these records. Open the linked authority and verify the current text with licensed counsel.

formalitiesofficial guidance

Mass. Gen. Laws ch. 209, § 25

Massachusetts premarital property-contract authorization

Before marriage, parties may make a written contract concerning property or rights of action held when marriage occurs; its limitations take effect upon marriage as if in a deed.

  • Section 25 is not a comprehensive divorce-prenup validity code.
propertyofficial guidance

Mass. Gen. Laws ch. 209, § 26

Massachusetts property schedule and recording rule

A clearly descriptive property schedule must be annexed, and the contract and schedule recorded before marriage or within ninety days afterward in the specified registry and where affected land lies.

  • Nonrecording has the statute's stated third-party consequences; section 26 is not a universal divorce-enforcement rule.
permitted subjectscase reporter

Osborne v. Osborne, 384 Mass. 591, 428 N.E.2d 810 (1981)

Massachusetts recognition of divorce-related premarital settlements

Massachusetts recognizes premarital settlement of divorce-related property and spousal-support consequences, subject to validity, conscionability, and nonwaivable limits.

  • DeMatteo discusses Osborne and supplies the modern framework; not every personal term is enforceable.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
voluntarinesscase reporter

DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Massachusetts controlling two-stage framework

DeMatteo requires a first look at execution-time fairness and reasonableness and a second look at enforcement-time conscionability.

  • Neither stage can be replaced by a generic fairness label.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
financial disclosurecase reporter

Rosenberg v. Lipnick, 377 Mass. 666, 389 N.E.2d 385 (1979)

Massachusetts disclosure and knowledge requirement

The waiving party must be informed of the other's worth or have adequate knowledge, and disclosure must permit a reasonable decision whether to proceed.

  • Exact valuations are not invariably required, but material omissions or misleading information remain consequential.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
limitationscase reporter

Rosenberg v. Lipnick, 377 Mass. 666, 389 N.E.2d 385 (1979)

Massachusetts premarital confidential relationship

Prospective spouses stand in a confidential relationship and must deal fairly and understandingly when making a premarital agreement.

  • The relationship informs agreement validity; it does not decide every later transaction.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
voluntarinesscase reporter

DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Massachusetts execution-time fairness review

The first look considers knowledge, disclosure, waiver language, counsel, review opportunity, understanding, and absence of overreaching.

  • One-sidedness alone is insufficient, but stripping substantially all marital interests presents a serious issue.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
independent counselcase reporter

DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Massachusetts independent-counsel factor

Separate counsel and meaningful review opportunity strongly inform knowing and voluntary execution but are not categorical execution formalities.

  • Counsel participation does not automatically cure deficient disclosure, misunderstanding, or pressure.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
timingcase reporter

DeMatteo v. DeMatteo, 436 Mass. 18 (2002); Austin v. Austin, 445 Mass. 601 (2005)

Massachusetts review-time inquiry

Massachusetts has no fixed waiting period; courts assess delivery, drafts, negotiation, counsel work, wedding pressure, and understanding on the full chronology.

  • Austin's two-day and DeMatteo's roughly two-week intervals were fact-specific, not safe harbors.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
limitationscase reporter

Rosenberg v. Lipnick, 377 Mass. 666 (1979); DeMatteo v. DeMatteo, 436 Mass. 18 (2002)

Massachusetts express-waiver requirement

The agreement must set forth the rights relinquished so the waiver can be evaluated as knowing, fair, and understanding.

  • A broad recital cannot substitute for construing the actual waiver and asserted right.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
effective datecase reporter

DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Massachusetts enforcement-time conscionability review

Changed circumstances may make enforcement unconscionable if they leave a spouse without sufficient property, maintenance, or employment capacity for self-support.

  • The second look is a conscionability safeguard, not ordinary discretionary division under section 34.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
limitationscase reporter

DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Massachusetts public-charge and child-interest limits

Potential public-charge consequences and conflict with a child's best interests exemplify limits private premarital terms cannot conclusively control.

  • These examples require current facts and law; they do not automatically invalidate the entire agreement.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
spousal supportcase reporter

Rudnick v. Rudnick, 102 Mass. App. Ct. 467, 285 N.E.3d 857 (2023)

Massachusetts current second-look application

Rudnick found enforcement unconscionable where breached title promises and the agreement left an elderly spouse without marital property, alimony, or sufficient resources.

  • Rudnick is fact-specific and creates no categorical age or duration rule.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
spousal supportcase reporter

Austin v. Austin, 445 Mass. 601, 839 N.E.2d 837 (2005)

Massachusetts support-waiver application

Austin enforced a negotiated waiver after finding execution validity and enforcement-time conscionability because meaningful assets and resources remained.

  • Austin supplies no universal formula for an enforceable support waiver.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
propertycase reporter

DeMatteo v. DeMatteo, 436 Mass. 18, 762 N.E.2d 797 (2002)

Massachusetts contract interpretation of premarital terms

An enforceable agreement remains a contract whose language, definitions, schedules, triggers, and integrated obligations must be construed.

  • Validity and interpretation are separate; a valid agreement may not reach the asserted asset or remedy.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
amendment revocationcase reporter

DeMatteo v. DeMatteo, 436 Mass. 18 (2002); Mass. Gen. Laws ch. 209, §§ 25–26

Massachusetts later-change classification boundary

Massachusetts has no UPAA-style general amendment section; a claimed change must satisfy the agreement, contract doctrine, and transaction-specific writing, deed, probate, or recording rules.

  • Do not infer a universal amendment method from section 25 or marital conduct.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
effective dateofficial guidance

Mass. Gen. Laws ch. 209, § 25

Massachusetts statutory effect at marriage

For a qualifying written property contract, limitations upon property rights take effect when marriage occurs as if contained in a deed.

  • This is specific to section 25, not a uniform-act applicability schedule.
child supportofficial guidance

Mass. Gen. Laws ch. 208, § 28

Massachusetts custody and best-interest boundary

Courts retain authority over custody, care, maintenance, and education of minor children under child-focused standards and continuing modification power.

  • Private terms may supply context but cannot displace the court's statutory responsibility.
child supportofficial guidance

Mass. Gen. Laws ch. 208, § 28

Massachusetts child-support guideline boundary

Child-support orders follow current law and the guideline presumption, subject to lawful deviation findings rather than a prospective private waiver.

  • An agreement cannot freeze a future child's support entitlement.
child supportofficial guidance

Mass. Gen. Laws ch. 119A, § 13

Massachusetts postjudgment child-support agreement limit

A postjudgment child-support agreement cannot bar modification without statutory findings, including guideline consistency and the child's best interests.

  • Section 13 concerns postjudgment agreements, not general prenup execution.
limitationscase reporter

DeMatteo v. DeMatteo, 436 Mass. 18 (2002); Mass. Gen. Laws ch. 208, §§ 17, 38

Massachusetts nonwaivable litigation-fee authority

A premarital agreement cannot eliminate statutory authority to award funds or expenses needed to litigate validity and the domestic-relations proceeding.

  • The amount and basis remain discretionary; fees are not guaranteed in every case.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
propertycase reporter

Matter of the Estate of Stacy, 96 Mass. App. Ct. 447, 136 N.E.3d 486 (2019)

Massachusetts premarital probate-waiver application

Stacy enforced plain premarital language waiving claims to identified separate property at death and excluded it from the surviving spouse's intestate-share calculation.

  • Probate construction is distinct from divorce enforcement and requires current-law review.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
effective datecase reporter

Rosenberg v. Lipnick, 377 Mass. 666, 389 N.E.2d 385 (1979)

Massachusetts Rosenberg prospective-rule boundary

Rosenberg made its revised rules prospective for instruments executed after publication, requiring historical-law analysis for earlier agreements.

  • Counsel must retrieve the actual historical authorities for older instruments.
Justia reproduction of published Massachusetts appellate opinionOpen source ↗
effective dateofficial guidance

Mass. Gen. Laws ch. 209, §§ 25–26; DeMatteo v. DeMatteo, 436 Mass. 18 (2002)

Massachusetts statutory and common-law applicability map

Massachusetts has no enacted UPAA or UPMAA schedule; execution date, marriage date, Rosenberg's line, amendments, and remedy determine governing law.

  • Reserved code sections and proposed bills are not current premarital-agreement law.

Known boundaries

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