Prenuptial Agreements

How Prenuptial Agreements Work in the United States

Prenuptial agreements in the United States are governed by state law, with 28 states and the District of Columbia having adopted the Uniform Premarital Agreement Act (UPAA) since its creation in 1983. States following the UPAA include Arizona, California, Colorado, Connecticut, Delaware, Florida, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Montana, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, North Dakota, Oregon, Rhode Island, South Dakota, Texas, Utah, Virginia, and Wisconsin.

Universal Legal Requirements

Every state requires prenuptial agreements to meet these basic standards under common law and statutory frameworks:

• Written form: Oral prenuptial agreements are unenforceable in all 50 states
• Voluntary execution: Both parties must sign without coercion or duress
• Financial disclosure: Most states require fair and reasonable disclosure of assets and debts
• No illegal provisions: Agreements cannot include terms that violate public policy or criminal statutes

California: The Strictest Requirements

California Family Code § 1615, amended in 2020, imposes the nation's strictest prenuptial agreement requirements. The seven-day rule mandates that both parties receive the final agreement at least seven calendar days before signing, regardless of whether they have legal counsel. This waiting period cannot be waived.

For spousal support waivers, California Family Code § 1615(c)(1) requires that the waiving party be represented by independent legal counsel at the time of signing. Without attorney representation, any provision limiting or eliminating spousal support is unenforceable. California courts have invalidated approximately 12% of prenuptial agreements due to unfair terms or procedural violations.

Texas: Community Property Framework

Texas Family Code Chapter 4 (Sections 4.001–4.006) governs prenuptial agreements under the state's Uniform Premarital Agreement Act. As one of nine community property states, Texas law presumes equal ownership of assets acquired during marriage unless a valid prenuptial agreement states otherwise.

Under Texas Family Code § 4.006, a prenuptial agreement is unenforceable only if the challenging party proves either: (1) involuntary execution, or (2) unconscionability combined with inadequate financial disclosure. Since 1993 amendments, Texas has excluded common-law defenses, making these the exclusive grounds for challenging enforcement.

New York: Acknowledgment and Notarization

New York Domestic Relations Law § 236(B)(3) requires prenuptial agreements to be in writing, subscribed by both parties, and acknowledged or proven in the manner required to record a deed. This effectively mandates notarization for enforceability in New York courts.

New York applies a two-tiered analysis: property division provisions receive standard contract enforcement, while spousal maintenance provisions undergo greater scrutiny. Courts examine whether maintenance terms were fair and reasonable at execution and remain conscionable at the time of divorce under the DRL § 236(B)(3) standard.

Florida: UPAA Adoption with Florida-Specific Standards

Florida Statute § 61.079 codifies the Uniform Premarital Agreement Act effective October 1, 2007. Florida law permits prenuptial agreements to address property rights, spousal support, life insurance beneficiaries, and estate planning arrangements.

Under Florida Statute § 61.079(7), a prenuptial agreement is unenforceable if the challenging party proves: the agreement was not executed voluntarily; the agreement was the product of fraud, duress, coercion, or overreaching; or the agreement was unconscionable when executed and the party was not provided fair disclosure and did not waive disclosure in writing.

What Cannot Be Included in Any State

No state permits prenuptial agreements to predetermine child custody, parenting time, or child support obligations. Courts in all jurisdictions retain authority to determine children's best interests at the time of separation. Provisions attempting to encourage divorce, waive child-related rights, or include illegal terms render those specific provisions—and potentially the entire agreement—unenforceable.

Average Costs by Complexity

Prenuptial agreement costs vary significantly based on asset complexity and geographic location:

• Simple agreements (few assets, no business interests): $1,200–$3,000
• Mid-range agreements (multiple assets, some investments): $3,000–$5,000
• Complex agreements (business interests, trusts, prior marriages): $5,000–$10,000+
• High-net-worth in major metro areas: $7,500–$10,000+ per spouse

Online platforms offer flat-fee alternatives ranging from $500–$600, though these require careful review for state-specific compliance. Each party should have independent legal counsel—agreements where only one party had an attorney face increased invalidation risk.

How Marriage Contracts Work in Canada

In Canada, prenuptial agreements are called "marriage contracts" or "domestic contracts" and are governed by provincial and territorial family law statutes. While the federal Divorce Act (R.S.C., 1985, c. 3) governs divorce proceedings, spousal support, and parenting arrangements, property division and contract enforceability fall under provincial jurisdiction.

Ontario: Family Law Act Framework

Ontario's Family Law Act, Part IV (Sections 51–60) provides the statutory framework for domestic contracts. Section 52 explicitly permits spouses or prospective spouses to enter marriage contracts addressing:

• Ownership and division of property during or after marriage
• Support obligations
• Direction of children's education and moral training (but not decision-making responsibility or parenting time)
• Any other matter in settlement of their affairs

Under Section 55(1) of the Ontario Family Law Act, a marriage contract must be in writing, signed by both parties, and witnessed. Section 56(4) permits courts to set aside marriage contracts where a party failed to disclose significant assets or debts, a party did not understand the nature or consequences of the agreement, or the agreement is otherwise unconscionable.

Critical limitation: Under Section 52(2), provisions purporting to limit a spouse's equal right to possession of the matrimonial home are unenforceable. Only a separation agreement, divorce order, or court order can affect matrimonial home rights in Ontario.

British Columbia: Family Law Act Standards

British Columbia's Family Law Act, Section 93 governs marriage agreements (effective March 18, 2013). BC distinguishes between "excluded property" (pre-relationship assets, inheritances, gifts) and "family property" (assets acquired during the relationship).

Under Section 93(1), enforceable agreements must be written with signatures witnessed by at least one other person. The Supreme Court may set aside agreements under Section 93(3) if:

• A spouse failed to disclose significant property, debts, or relevant information
• A spouse took improper advantage of the other's vulnerability, ignorance, need, or distress
• A spouse did not understand the agreement's nature or consequences
• Other circumstances would void the contract under common law

The Supreme Court of Canada has confirmed that BC's Family Relations Act (predecessor to the Family Law Act) has a lower threshold for judicial intervention than other provinces, giving courts broader discretion to re-divide assets on fairness grounds.

Quebec: Civil Code Notarization Requirement

Quebec operates under a civil law system distinct from the common law provinces. Marriage contracts in Quebec must be notarized to be valid under the Civil Code of Québec. The notary must also register a notice in the register of personal and movable real rights.

Since July 1, 1970, Quebec's default matrimonial regime is "partnership of acquests" (société d'acquêts), under which property acquired during marriage is divided equally upon dissolution. Couples may instead choose "separation as to property" (séparation de biens) through a notarized marriage contract, where each spouse administers their own property.

Marriage contracts in Quebec typically cost CA$400–$1,000 for simple agreements, with complex contracts billed at the notary's hourly rate. Contracts can be signed before or after marriage, though post-marriage contracts take effect upon signing rather than on the wedding date.

Alberta: Family Property Act Requirements

Alberta's Family Property Act, Sections 37–38 establishes strict requirements for enforceable marriage agreements. Section 38(1) mandates that each party must acknowledge in writing, separately from the other:

• Awareness of the agreement's nature and effects
• Awareness of possible future property claims under the Act
• Intention to give up such claims to effectuate the agreement
• Signing freely and voluntarily without compulsion

Independent legal advice is required in Alberta—each partner must receive and sign a certificate confirming they obtained advice from their own separate lawyer. The agreement must be signed in the presence of their respective lawyers. Failure to comply with Sections 37–38 renders the agreement non-binding, though Section 8(g) requires courts to still consider the agreement's terms when distributing family property.

Parenting Arrangements and Child Support

No Canadian province permits marriage contracts to predetermine decision-making responsibility, parenting time, or child support. The 2021 Divorce Act amendments replaced "custody" and "access" terminology with "decision-making responsibility" and "parenting time." Courts determine parenting arrangements based on the child's best interests at the time of separation.

The Federal Child Support Guidelines (SOR/97-175) establish mandatory child support calculation formulas. Section 7 expenses (special or extraordinary expenses for childcare, education, health) cannot be waived or predetermined in a marriage contract.

Canadian Costs and Timeline

Marriage contract costs in Canada vary by province and complexity:

• Quebec notarization: CA$400–$1,000 (simple), hourly rate for complex
• Ontario/BC with lawyers: CA$2,500–$7,500 per party for negotiated agreements
• Alberta with mandatory ILA: CA$1,500–$5,000 per party

Couples should begin the marriage contract process at least 2–3 months before the wedding to allow adequate time for disclosure, legal review, and negotiation without pressure.