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What Is a Prenuptial Agreement?

Federal & State Law Editorial TeamLast reviewed: 2025-10-12

A prenuptial agreement (prenup) is a legally binding contract entered into before marriage that addresses financial rights and obligations during and after the marriage.

What a prenup can cover:

  • Division of property and assets acquired before and during the marriage
  • Responsibility for debts
  • Spousal support (alimony) terms
  • Protection of business interests
  • Inheritance rights
  • Financial responsibilities during the marriage
  • What a prenup cannot cover:

  • Child custody or child support (courts decide these based on the child's best interests)
  • Non-financial personal matters
  • Anything illegal or unconscionable
  • Requirements for enforceability:

  • Written and signed by both parties.
  • Voluntary — Neither party was coerced or pressured.
  • Full disclosure — Both parties fully disclosed their assets and debts.
  • Fair and reasonable — The terms are not grossly unfair or unconscionable.
  • Independent counsel — While not always required, both parties having their own attorney strengthens enforceability.
  • Proper timing — Signed well before the wedding to avoid claims of duress.
  • When a prenup may be challenged:

  • One party did not have adequate time to review it.
  • There was fraud or hidden assets.
  • One party signed under duress.
  • The terms are so one-sided as to be unconscionable.
  • Postnuptial agreements. Similar agreements can be entered into after marriage, though they may face greater scrutiny from courts.

    This is legal information, not legal advice.

    When to Talk to a Lawyer
    • You want to create a prenuptial agreement
    • You have been presented with a prenup and need independent review
    • You want to challenge a prenuptial agreement in a divorce
    Related Statutes & Laws
    • Uniform Premarital Agreement Act (UPAA)
    • State contract law

    This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.