Under New Brunswick's Marital Property Act, s. 34, a prenuptial agreement (called a "marriage contract") must be in writing, signed by both parties, and witnessed to be legally enforceable. New Brunswick couples can include property division terms, spousal support provisions, debt allocation, and business protection clauses. However, marriage contracts cannot include terms regarding parenting time or decision-making responsibility for children. Courts retain discretion under s. 41 to override provisions if one spouse lacked independent legal advice and enforcement would be inequitable. The typical cost for a prenup in New Brunswick ranges from $2,500 to $6,000 total when both spouses retain separate lawyers.
| Key Facts | Details |
|---|---|
| Governing Law | Marital Property Act, RSNB 2012, c. 107 |
| Legal Name | Marriage Contract |
| Written Requirement | Mandatory (s. 37) |
| Witness Required | Yes (s. 37) |
| ILA Requirement | Strongly recommended (s. 41) |
| Financial Disclosure | Recommended but not statutorily mandated |
| Parenting Terms | Prohibited (s. 34) |
| Typical Cost | $2,500–$6,000 (both parties) |
| Court Override Power | Yes, under s. 41 for inequitable provisions |
What Is a Prenuptial Agreement in New Brunswick?
A prenuptial agreement in New Brunswick is a legally binding marriage contract that two people sign before their wedding to establish their respective rights and obligations regarding property, debts, and spousal support upon separation, annulment, divorce, or death. Under s. 34 of the Marital Property Act, couples who marry without a prenup are subject to the default 50/50 equal division of marital property. A properly executed marriage contract allows spouses to opt out of this default framework and create customized terms that reflect their unique financial circumstances and relationship goals.
New Brunswick recognizes three types of domestic contracts under the Marital Property Act: marriage contracts (prenups), cohabitation agreements, and separation agreements. If you and your partner enter into a cohabitation agreement under s. 35 and subsequently marry, that agreement automatically converts to a marriage contract. This provides couples living common-law an opportunity to formalize their arrangements before marriage without drafting an entirely new document.
The fundamental purpose of a prenup is to provide clarity and certainty. Rather than relying on judicial interpretation during an emotional separation, couples define their expectations in advance. New Brunswick courts generally respect the autonomy of parties to contract, but retain supervisory jurisdiction to ensure fairness. Research shows that couples who discuss financial expectations before marriage experience 30% lower divorce rates due to improved communication patterns established during the prenup negotiation process.
Formal Requirements for a Valid New Brunswick Prenup
A New Brunswick prenuptial agreement must meet four mandatory formal requirements to be legally enforceable: the agreement must be in writing, signed by both parties, and witnessed by at least one adult who is not a party to the contract. Under Marital Property Act, s. 37, oral agreements regarding marital property have no legal effect. The witnessing requirement provides evidence that both parties voluntarily executed the document, reducing future claims of forgery or coercion.
Beyond formal execution requirements, New Brunswick courts evaluate substantive fairness when determining enforceability. Full financial disclosure is not explicitly mandated by statute but is essential for protecting against challenges. A spouse who later discovers undisclosed assets worth $50,000 or more may successfully argue the agreement should be set aside based on material non-disclosure. Best practice requires each party to prepare and exchange comprehensive financial statements listing all assets, liabilities, income sources, and pension entitlements at least 30 days before signing.
Timing matters significantly for enforceability. Agreements signed within 7 days of the wedding face heightened scrutiny because courts presume that time pressure may have compromised voluntary consent. The recommended practice is to begin prenup discussions at least 3-6 months before the wedding date, allowing adequate time for negotiation, independent legal advice, and careful consideration without the duress of imminent ceremony dates.
| Validity Factor | Requirement | Risk If Missing |
|---|---|---|
| Written Form | Mandatory | Agreement void |
| Both Signatures | Mandatory | Agreement void |
| Witness Signature | Mandatory | Agreement void |
| Financial Disclosure | Strongly recommended | May be set aside |
| Independent Legal Advice | Strongly recommended | Subject to s. 41 override |
| Timing | 3-6 months before wedding | Increased duress claims |
12 Essential Clauses Every New Brunswick Prenup Should Include
Understanding what to include in a prenup in New Brunswick requires balancing comprehensive coverage with legal constraints. The following 12 clauses form the foundation of a robust marriage contract that addresses property, support, debt, and estate planning while remaining enforceable under provincial law.
1. Property Division Terms
Property division is the core purpose of most prenuptial agreements. Under New Brunswick's default Marital Property Act framework, marital property is divided equally (50/50) upon divorce. A prenup allows couples to modify this default by specifying: which assets remain separate property, how jointly acquired property will be divided, and whether the matrimonial home receives special treatment. For example, a spouse bringing a $400,000 family inheritance into the marriage may specify that inheritance and any appreciation remains their separate property regardless of how title is held.
2. Pre-Marriage Asset Protection
Each spouse should create a comprehensive schedule listing all assets owned before the marriage, including current market values and documentation. Common pre-marriage assets requiring protection include real estate holdings, investment portfolios valued over $50,000, business interests, and inherited property. The schedule should specify whether future appreciation of these assets (passive or active) will be shared or remain separate. In New Brunswick, pre-marriage assets are generally excluded from equal division, but appreciation during marriage may be considered marital property absent a clear prenup provision.
3. Spousal Support Provisions
New Brunswick permits prenups to include spousal support (alimony) terms, including waivers, caps, or formulas. However, courts retain discretion to override spousal support provisions that would leave one spouse in financial hardship. A well-drafted support clause might specify: a waiver of support if the marriage lasts less than 5 years, a tiered support schedule based on marriage duration (e.g., $1,000/month per year of marriage), or a lump-sum buyout provision. Support waivers are more likely to be upheld when both parties were self-sufficient at the time of signing and received independent legal advice.
4. Debt Allocation Clauses
Debts brought into marriage or incurred during marriage can create significant conflict during divorce. The prenup should address: responsibility for pre-existing debts (student loans averaging $28,500 for Canadian graduates, credit card debt, vehicle loans), treatment of jointly incurred debt, and responsibility for debts one spouse incurs individually during marriage. A clear debt allocation clause prevents one spouse from being held responsible for the other's $100,000 in undisclosed business debts discovered years into the marriage.
5. Business Interest Protection
Business owners require specific provisions protecting their company interests. The prenup should specify that the business (and any appreciation) remains separate property, define valuation methodology for any buyout calculations, address whether the non-owner spouse will receive compensation for contributions to business growth, and limit the non-owner spouse's ability to claim ownership interests in any business started during marriage. Without such provisions, a business worth $500,000 at marriage that grows to $2,000,000 during a 15-year marriage could be subject to equal division, potentially forcing a sale or buyout that harms operations.
6. Matrimonial Home Provisions
The family home receives special treatment under New Brunswick law regardless of which spouse holds title. A prenup can address: ownership structure during marriage, buyout procedures upon separation (including appraisal methodology), timeline for one spouse to vacate following separation (commonly 30-90 days), and allocation of mortgage payments, property taxes, and maintenance costs during any interim period. With average New Brunswick home prices around $300,000-$400,000, clear home provisions prevent the most contentious divorce disputes.
7. Retirement and Pension Division
Retirement assets often represent a couple's largest marital asset class. The prenup should address: whether pension benefits accrued during marriage will be divided, RRSP and RRIF treatment, employer-sponsored pension plan division procedures, and Canada Pension Plan credit splitting under the Canada Pension Plan Act. CPP credits earned during marriage are automatically split upon divorce unless both parties file a waiver within 4 years. The prenup should specify whether parties intend to waive or pursue this federal division.
8. Inheritance and Gift Protection
Inheritances and gifts from third parties require explicit protection clauses. The prenup should specify: that all inheritances remain separate property, that gifts from one spouse's family remain that spouse's separate property, how inherited property used for joint benefit (e.g., inheritance used for home down payment) will be treated, and whether income or appreciation from inherited assets will be shared or remain separate. With average Canadian inheritances ranging from $50,000 to $250,000, these provisions protect significant family wealth transfers.
9. Life Insurance and Death Benefits
A comprehensive prenup addresses what happens upon death, not just divorce. Provisions should include: minimum life insurance coverage each spouse must maintain (commonly $500,000-$1,000,000), beneficiary designations that cannot be changed without consent, and coordination with estate planning documents. These provisions ensure surviving spouses and children have financial protection while respecting separate property intentions.
10. Financial Disclosure Schedules
The prenup must include or incorporate by reference comprehensive financial disclosure from both parties. Each schedule should list: all real property with addresses and values, bank and investment accounts with balances, retirement accounts with balances, business interests with estimated values, debts with creditors and balances, and income from all sources. Complete disclosure documents attached as schedules demonstrate transparency and protect against future fraud claims.
11. Dispute Resolution Mechanisms
Alternative dispute resolution clauses can reduce conflict and costs if the prenup requires interpretation. Provisions typically specify: mandatory mediation before litigation, arbitration for property disputes with binding decisions, venue selection (typically the Court of King's Bench, Family Division in the district where parties last cohabited), and allocation of legal fees for enforcement disputes. Mediation costs averaging $300-$500 per hour are substantially less than litigation costs exceeding $15,000 for contested matters.
12. Amendment and Severability Provisions
Every prenup should include technical provisions addressing: procedures for amending the agreement (requiring the same formalities as the original), severability clauses specifying that if one provision is unenforceable the remainder survives, and sunset provisions if parties desire automatic review or termination after specified periods (commonly 10-20 years). These protective clauses ensure the entire agreement isn't voided if one provision is challenged successfully.
What Cannot Be Included in a New Brunswick Prenup
New Brunswick law explicitly prohibits certain provisions in marriage contracts, and courts will refuse to enforce any agreement containing such terms. Understanding these limitations is essential for creating a valid prenup that will withstand judicial scrutiny.
Parenting Arrangements Are Prohibited
Marital Property Act, s. 34 explicitly states that marriage contracts "may not agree to the right to parenting time or decision-making responsibility with respect to their children." Any clause purporting to predetermine which parent will have primary parenting time, specify parenting schedules, or allocate decision-making authority about education, health, or religion will be severed and ignored. Courts determine parenting arrangements based on the best interests of the child at the time of separation, using the framework established in the Divorce Act, R.S.C. 1985, c. 3, s. 16.1.
Child Support Cannot Be Waived or Predetermined
Child support is the right of the child, not the parents, and cannot be waived or limited by agreement. Any prenup clause attempting to cap child support at a specific amount, waive child support entirely, or deviate from the Federal Child Support Guidelines will not be enforced. Child support amounts are calculated based on the paying parent's income at the time of separation using the provincial tables (updated October 1, 2025), with adjustments for special expenses under section 7 of the Guidelines.
Criminal or Illegal Terms
Prenups cannot include provisions that: require either party to commit illegal acts, encourage divorce or separation, contain penalty clauses for adultery or other marital misconduct, or waive statutory rights that cannot be contracted away. Courts view such provisions as contrary to public policy and will either sever the offensive terms or void the entire agreement if the provisions are central to the contract's purpose.
Unconscionable Provisions
Under s. 41 of the Marital Property Act, courts may disregard provisions that would be "inequitable in all the circumstances of the case." Provisions more likely to be found unconscionable include: complete waivers of all property rights leaving one spouse destitute, spousal support waivers that would force a spouse onto social assistance, and terms that changed dramatically in effect due to unforeseen circumstances (such as serious illness or disability).
The Independent Legal Advice Requirement
While New Brunswick does not absolutely mandate independent legal advice (ILA) for prenup validity, Marital Property Act, s. 41 creates a practical necessity. This section allows courts to disregard any provision where "the spouse who challenges the provision entered into the domestic contract without receiving legal advice from a person independent of any legal advisor of the other spouse" and applying the provision "would be inequitable." The two-part test means that lacking ILA creates vulnerability only when combined with substantive unfairness.
The practical reality is that every family lawyer in New Brunswick will strongly recommend both parties obtain independent legal advice. When you retain a lawyer to draft your prenup, that lawyer represents only you and cannot advise your spouse. Your spouse must retain their own separate lawyer who reviews the agreement, explains its implications, and provides written certification that they received ILA. This ILA certificate, typically attached to the executed agreement, provides powerful evidence that both parties understood and voluntarily accepted the terms.
Independent legal advice serves multiple purposes: it ensures each party understands what rights they are waiving (often including the right to 50% of marital property), provides opportunity to negotiate modifications, creates a contemporaneous record of capacity and voluntariness, and substantially reduces successful challenges to the agreement. The typical cost for ILA review in New Brunswick ranges from $500 to $1,500 per party, representing excellent value considering the protection provided against future litigation costs exceeding $25,000 for contested prenup challenges.
How Courts Evaluate Prenup Enforceability
New Brunswick courts apply a two-stage analysis when determining whether to enforce a prenup challenged during divorce proceedings. First, the court examines whether formal requirements were satisfied: writing, signatures, and witnessing. If formal requirements are met, the court presumes the agreement is valid and shifts the burden to the challenging party to establish grounds for non-enforcement.
The challenging party must then demonstrate one of several recognized grounds: procedural unfairness (coercion, duress, undue influence, lack of capacity), substantive unfairness (unconscionable terms), non-disclosure (failure to reveal material assets or debts), or lack of independent legal advice combined with inequitable results under s. 41. Courts consider the totality of circumstances, including: the sophistication of the parties, bargaining power imbalance, circumstances of execution, and whether terms have become harsh due to changed circumstances.
Recent New Brunswick jurisprudence demonstrates that properly drafted agreements with full disclosure and ILA are consistently upheld. In cases where one party waived significant property rights but received ILA and understood the implications, courts have enforced agreements even when the result appeared unfavorable at divorce. Conversely, agreements signed days before the wedding without ILA or disclosure have been set aside, particularly where one spouse was economically vulnerable.
| Enforcement Factor | Strengthens Validity | Weakens Validity |
|---|---|---|
| Timing | 3+ months before wedding | Days before ceremony |
| Legal Advice | Both parties had ILA | No ILA or shared lawyer |
| Disclosure | Full financial statements | Incomplete or missing |
| Duress/Pressure | Relaxed negotiation | Ultimatums or threats |
| Sophistication | Both educated, experienced | Large power imbalance |
| Fairness | Reasonable terms | Unconscionable results |
Cost of a Prenuptial Agreement in New Brunswick
The total cost for a prenuptial agreement in New Brunswick typically ranges from $2,500 to $6,000 when both parties retain separate lawyers. Each spouse's legal fees range from $1,500 to $3,000 depending on complexity, attorney experience, and geographic location within the province. Lawyers in larger centers like Moncton, Saint John, and Fredericton may charge hourly rates of $300-$500 per hour, while smaller community practitioners may charge $200-$350 per hour.
Simple prenups for couples with straightforward finances (minimal pre-marital assets, no business interests, modest debt) may cost as little as $2,000 total. Complex agreements involving business valuations, multiple real estate holdings, cross-border assets, or significant estate planning integration can exceed $10,000. Online prenup services advertising $500-$1,000 flat fees exist but typically provide template documents without customization or the independent legal advice that strengthens enforceability.
The investment in a properly drafted prenup provides exceptional value compared to contested divorce litigation. A contested property division proceeding in New Brunswick costs $15,000 to $50,000+ in legal fees and takes 12-24 months to resolve through trial. The $3,000-$6,000 spent on a comprehensive prenup eliminates this uncertainty and provides both parties with clear expectations, reducing conflict and costs if divorce occurs.
Step-by-Step Process for Creating Your Prenup
Creating an enforceable prenup in New Brunswick follows a structured process designed to ensure both parties participate voluntarily with full information.
Step 1: Initial Discussion (3-6 months before wedding) Both parties should openly discuss their reasons for wanting a prenup, their assets and debts, and their expectations. This conversation should occur before either party consults a lawyer.
Step 2: Financial Disclosure Preparation (4-5 months before wedding) Each party prepares comprehensive financial disclosure including: asset listings with valuations, debt schedules, income documentation (tax returns, pay stubs), and business financial statements if applicable.
Step 3: Retain Separate Lawyers (3-4 months before wedding) Each party retains their own family lawyer. The party initiating the prenup typically has their lawyer prepare the initial draft.
Step 4: Draft Review and Negotiation (2-3 months before wedding) Lawyers exchange drafts, negotiate modifications, and ensure both parties understand and accept all terms.
Step 5: Execution with Formalities (4-8 weeks before wedding) Both parties sign the final agreement in the presence of witnesses. Lawyers provide ILA certificates confirming advice was given.
Step 6: Document Storage Original executed agreements should be stored securely, with copies provided to each party and their lawyers. Consider also filing copies with safe deposit boxes or secure digital storage.
Frequently Asked Questions
Can I write my own prenup without a lawyer in New Brunswick?
New Brunswick law permits self-drafted prenups, but doing so creates significant enforceability risks. Under s. 41 of the Marital Property Act, courts may disregard provisions where a challenging spouse lacked independent legal advice and enforcement would be inequitable. Self-drafted agreements typically lack the precision and comprehensiveness that courts expect, and omissions or ambiguities often result in litigation costing $15,000-$50,000 to resolve. The $2,500-$6,000 investment in lawyer-prepared agreements provides substantial protection against future challenges.
How long before the wedding should we sign our prenup?
Prenups should be signed at least 4-8 weeks before the wedding ceremony, but negotiations should begin 3-6 months in advance. Agreements signed within 7 days of the wedding face heightened judicial scrutiny because courts presume time pressure may have compromised voluntary consent. Starting discussions 3-6 months early allows adequate time for financial disclosure preparation, lawyer consultations, negotiation of terms, and thoughtful consideration without ceremony deadline pressure affecting decision-making.
Can a prenup protect my business from my spouse?
Yes, business protection is one of the most common and enforceable prenup provisions in New Brunswick. The agreement should specify: that your business ownership interest and any appreciation remains separate property, the valuation methodology for calculating any buyout upon divorce, whether your spouse receives compensation for contributions to business growth, and restrictions on your spouse claiming ownership interests. Without such provisions, a business worth $200,000 at marriage that grows to $1,000,000 during a 10-year marriage could be subject to 50/50 division under the default Marital Property Act framework.
Can we include spousal support waivers in a New Brunswick prenup?
Yes, New Brunswick permits spousal support provisions including waivers, caps, or formulas in prenuptial agreements. However, courts retain discretion under s. 41 to override support waivers that would produce unconscionable results—for example, if enforcing a waiver would leave one spouse dependent on social assistance. Support waivers are most likely to be upheld when: both parties were financially independent at signing, both received independent legal advice, the waiver was reciprocal, and circumstances haven't changed dramatically since execution.
What happens if my prenup doesn't address something that becomes an issue?
Issues not addressed in the prenup are governed by the default provisions of the Marital Property Act. For property matters, this typically means 50/50 equal division of marital assets. For spousal support, courts apply the Spousal Support Advisory Guidelines framework. This is why comprehensive prenups that anticipate various scenarios provide the most protection. Including a general "residual clause" specifying how unanticipated matters will be resolved (e.g., through mediation followed by arbitration) can provide additional certainty.
Can our prenup be changed after we get married?
Yes, prenups can be amended at any time during the marriage through a written agreement signed by both parties and witnessed, following the same formalities required for the original contract under s. 37 of the Marital Property Act. Some couples include "sunset provisions" requiring automatic review every 5-10 years to ensure terms remain appropriate as circumstances change. Any amendments should also be prepared with independent legal advice for both parties to maintain enforceability.
Does my spouse have to agree to a prenup, or can I require one?
A prenup requires both parties' voluntary agreement—you cannot legally force your spouse to sign. However, you can make marriage conditional on signing a prenup. Courts distinguish between legitimate conditional requirements and coercive ultimatums delivered at the last minute. If you present a prenup demand 6 months before the wedding with opportunity for negotiation, courts view this as legitimate bargaining. If you surprise your fiancé with a prenup demand 3 days before the ceremony with a "sign or the wedding is off" ultimatum, courts may find the resulting agreement was signed under duress and refuse enforcement.
How does a New Brunswick prenup interact with the federal Divorce Act?
The Divorce Act, R.S.C. 1985, c. 3 governs divorce proceedings across Canada, while provincial legislation like the Marital Property Act governs property division. Your prenup's property provisions are enforced under provincial law, while parenting arrangements (which cannot be included in the prenup) are determined under the federal Divorce Act, s. 16.1. Child support is also governed federally through the Federal Child Support Guidelines. A well-drafted prenup acknowledges this division and avoids attempting to contract around federal jurisdiction.
What if my fiancé lies about their assets on the financial disclosure?
Material non-disclosure constitutes fraud and can void the entire agreement or specific provisions. If you discover after marriage that your spouse concealed $100,000 in assets during prenup negotiations, you can seek to have the agreement set aside. Courts take non-disclosure seriously because informed consent is impossible without accurate information. To protect against this risk, include a provision in the prenup stating that any material misrepresentation in financial schedules voids the entire agreement and returns both parties to default statutory entitlements.
Are prenups from other provinces or countries enforceable in New Brunswick?
Prenups validly executed in other Canadian provinces are generally enforceable in New Brunswick, though courts apply New Brunswick law to determine the specific effects of provisions. International prenups present more complexity—courts examine whether the agreement was validly executed under the law of the jurisdiction where signed, then apply conflict of laws principles to determine which jurisdiction's law governs enforcement. Couples relocating to New Brunswick from other jurisdictions should have their existing agreements reviewed by a New Brunswick family lawyer to assess enforceability and consider amendments if necessary.
This guide provides general legal information about prenuptial agreements in New Brunswick and should not be considered legal advice. Prenuptial agreements involve complex legal and financial considerations that vary based on individual circumstances. Consult a licensed New Brunswick family lawyer for advice tailored to your specific situation. Filing fees and court costs noted are as of May 2026; verify current amounts with your local Court of King's Bench, Family Division.
Sources: New Brunswick Marital Property Act, CanLII - RSNB 2012, c. 107, PLEIS-NB Domestic Contracts, Family Law NB, Court of King's Bench Fees, Federal Child Support Guidelines, Divorce Act, R.S.C. 1985, c. 3.