Prenuptial agreements across Canada and the United States
Select your province or state to understand the rules that apply to your prenup.
Ontario: Marriage Contracts
In Ontario, prenuptial agreements are called "marriage contracts" under the Family Law Act. The agreement must be in writing and signed by both parties. Witness requirements are not strictly mandated by law, but having a witness strengthens enforceability if challenged later. Full financial disclosure of assets, liabilities, and income is mandatory for both parties.
Independent legal advice is strongly recommended but not legally required. However, without ILA documentation, courts may be more inclined to set aside the agreement if circumstances change significantly. A marriage contract cannot waive or limit a child's right to support, but it can address spousal support, property division, and equalization rights. Many couples choose to waive their equalization rights if both parties have had full financial disclosure and understand what they're giving up.
The agreement becomes enforceable immediately upon signing and remains in force regardless of where you live later.
British Columbia: Marriage Agreements
British Columbia recognizes prenuptial agreements as "marriage agreements" under the Family Law Act. These must be in writing and signed by both parties. Financial disclosure is required, and courts expect both parties to have had meaningful opportunity to review and understand the agreement and its financial implications.
Independent legal advice is technically not required by statute, but it's strongly recommended and significantly strengthens enforceability. Without documented ILA, a court may be more likely to set aside the agreement if it's challenged. A marriage agreement can address property division, spousal support, and the calculation of family property. It cannot limit or eliminate child support obligations.
BC's Family Law Act grants common-law partners significant automatic rights (equivalent to married couples after 2 years), so a prenup is especially important if you want to modify or opt out of those defaults.
Alberta: Domestic Contracts
In Alberta, prenuptial agreements are called "domestic contracts" under the Matrimonial Property Act. The contract must be in writing and signed by both parties. Full financial disclosure is essential, and both parties must clearly understand the terms and their implications.
Independent legal advice is not statutorily required, but it's strongly recommended. Alberta courts take enforceability seriously, and documented ILA significantly strengthens the agreement's validity. A domestic contract cannot predetermine or waive a child's right to support. It can, however, address spousal support, property division, and the treatment of specific assets.
The agreement applies to assets acquired during the engagement and marriage, but not to assets either party owned before the relationship.
Quebec: Marriage Contracts
In Quebec, a prenuptial agreement is called a "contrat de mariage" (marriage contract) and is governed by the Civil Code. Unlike the rest of Canada, Quebec's marriage contract must be notarised by a Quebec notary. This is not optional, without notarisation, the contract has no legal effect in Quebec.
This is especially significant because Quebec law defaults to the "partnership of acquests" regime, which means assets acquired during the marriage are automatically shared equally. A properly notarised marriage contract can modify these default rules entirely. The agreement can address property division, the treatment of inheritances, debts, and business interests. Independent legal advice is not legally required, but it's highly recommended given the binding nature of a notarised contract.
If you marry without a notarised contract, Quebec's partnership of acquests rules apply automatically, which may not protect what either party brought into the marriage.
California: Premarital Agreements
California prenuptial agreements are governed by California Family Code Section 721 and the Uniform Premarital Agreement Act. The agreement must be in writing and signed by both parties. California law requires a 7-day waiting period between presenting the agreement to the other party and signing, this is mandatory and cannot be waived.
Both parties must have independent legal advice or at least the opportunity to consult with a lawyer before signing. Full financial disclosure is required. A premarital agreement cannot limit or waive rights to child support. It can address spousal support (with limits), property division, and debt allocation.
California courts scrutinise prenups heavily. The agreement must be fair, not unconscionable, and must reflect informed consent. Having documentation of the 7-day waiting period and each party's opportunity for ILA is critical for enforceability.
New York: Prenuptial Agreements
New York prenuptial agreements are governed by the Domestic Relations Law. The agreement must be in writing and signed by both parties. Both signatures must be acknowledged before a notary public, which creates a formal record of execution.
Full financial disclosure is essential and should be documented. Independent legal advice is not statutorily required but is critical in practice. New York courts scrutinise prenups more heavily than many states, particularly if one party waives significant spousal rights. Without documented ILA for the less-advantaged party, courts are more likely to find the agreement unconscionable and unenforceable.
The agreement cannot limit or waive child support rights. It can address spousal support, property division, and asset allocation. The agreement should clearly address how it applies to separate property, community property principles, and inheritances.
Texas: Premarital Agreements
Texas prenuptial agreements are called "premarital agreements" and are governed by Texas Family Code Chapter 4. The agreement must be in writing and signed by both parties. Unlike some states, Texas does not require witness or notary signatures by statute, though both are strongly recommended for clarity and proof of execution.
Texas does not strictly require financial disclosure by statute, but disclosure is essential for enforceability in practice. A court may refuse to enforce an agreement if one party can show they had no knowledge of the other party's assets or liabilities. The agreement cannot adversely affect a child's right to support. It can address spousal support, property division, and the treatment of community property.
Texas is a community property state, meaning property acquired during marriage is generally split equally unless an agreement says otherwise. A prenup is the mechanism for opting out of community property rules or defining separate property boundaries.
Florida: Prenuptial Agreements
Florida prenuptial agreements are governed by the Florida Uniform Prenuptial Agreement Act (Florida Statutes 61.079). The agreement must be in writing and signed by both parties. Florida law does not require notarisation or witness signatures by statute, though both are strongly recommended to avoid later disputes about execution.
Full financial disclosure is not statutorily required but is practically essential. Courts are more likely to enforce an agreement if both parties had full knowledge of the other's financial position. The agreement cannot limit or waive child support rights. It can address spousal support, property division, and the characterisation of assets as separate or marital property.
Florida is an equitable distribution state, not a community property state. Without a prenup, the court divides assets "fairly" based on multiple factors, a prenup provides certainty.
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