A prenup business owner New Brunswick couples sign is called a marriage contract, authorized under Marital Property Act § 34. It lets a business owner opt out of the default 50/50 marital property split, protecting an LLC, corporation, or partnership. Without one, a spouse can claim an equal share of business growth during the marriage.
Key Facts: Business Owner Prenups in New Brunswick
| Factor | New Brunswick Rule |
|---|---|
| Filing Fee (divorce) | $110 total ($100 petition + $10 clearance certificate) |
| Waiting Period | Property application within 60 days of divorce judgment |
| Residency Requirement | One spouse ordinarily resident 12 months before filing |
| Grounds | Marriage breakdown (1-year separation, adultery, or cruelty) |
| Property Division Type | Equal division (presumptive 50/50) under Marital Property Act |
As of March 2026. Verify with your local clerk and the Court of King's Bench, Family Division.
Why Business Owners in New Brunswick Need a Prenup
A business owner in New Brunswick needs a marriage contract because the Marital Property Act presumes an equal 50/50 division of marital property, and the increase in a business's value during marriage is generally divisible. Under Marital Property Act § 2, each spouse is entitled to an equal share of marital property and bears an equal share of marital debts.
New Brunswick is unusual among Canadian provinces because it applies a strict equal-division presumption rather than a purely discretionary equitable model. For a business owner, this means that if your company grows from $200,000 to $1.2 million during a 10-year marriage, the $1 million in appreciation may be subject to a 50% claim by your spouse upon separation. A marriage contract is the primary legal mechanism that allows spouses to opt out of this default rule and define their own arrangement. The entrepreneurial prenup New Brunswick founders rely on does not eliminate fairness obligations, but it does let the parties pre-agree on how a business is characterized, valued, and divided, replacing an uncertain court outcome with a negotiated one.
What a Marriage Contract Can and Cannot Cover
A New Brunswick marriage contract can address property division, spousal support, and the financial rights of each spouse, but it cannot deal with parenting arrangements or child support. Under Marital Property Act § 34, two persons may agree on their respective rights and obligations before or during marriage.
The statute draws a firm line at children. A marriage contract cannot deal with the right to decision-making responsibility or parenting time, and any clause attempting to waive or cap child support is unenforceable because support is the right of the child. Courts determine child support under the Federal Child Support Guidelines at the time of need, regardless of contract language. For a business owner, the protectable subject matter is therefore the company itself: ownership shares, the appreciation in value during the marriage, retained earnings, and any spousal support obligation tied to the business income. A protect-business prenup New Brunswick couples sign typically classifies the business as separate property, fixes a baseline valuation date, and specifies whether a spouse shares in future growth. These business-related terms are fully enforceable when the contract meets the formal and fairness requirements set out below.
Formal Requirements for a Valid New Brunswick Prenup
A New Brunswick marriage contract must be in writing, signed by both parties, and witnessed to be valid. The Marital Property Act requires these three formalities for every domestic contract; an oral or unwitnessed agreement is unenforceable regardless of how clearly the parties intended to be bound.
These formalities are the minimum, not the safeguard. Three additional practices protect a business owner from a later challenge. First, full and frank financial disclosure: each party should exchange a written statement of assets, debts, income, and—critically for a business owner—a current valuation of the company. Second, independent legal advice (ILA): although ILA is not strictly required by statute, Marital Property Act § 41 lets a court disregard a provision where the challenging spouse signed without legal advice independent of the other spouse's lawyer and enforcing the term would be inequitable. Third, timing: signing well before the wedding (not days before) reduces any argument of duress. An LLC prenup New Brunswick founder who follows all three practices builds an agreement that is far more likely to survive scrutiny.
How Courts Can Set Aside a Business Owner's Prenup
A New Brunswick court can disregard a provision of a marriage contract under Marital Property Act § 41 if the challenging spouse lacked independent legal advice and enforcing the provision would be inequitable in all the circumstances. The strongest statutory trigger is the combination of no ILA plus an inequitable outcome.
Beyond the statute, New Brunswick courts apply the national framework from the Supreme Court of Canada in Miglin v. Miglin, 2003 SCC 24, and Anderson v. Anderson, 2023 SCC 13. These cases identify several grounds to set aside a contract: inadequate financial disclosure, unconscionability, duress or undue influence, and a material change in circumstances. For a business owner, the most common attack is a disclosure failure—concealing or understating the value of a business interest. If a spouse can show the company was worth $900,000 but was disclosed at $300,000, a court may treat the resulting division as inequitable and set the relevant clause aside. Anderson confirms that missing ILA or disclosure is not automatically fatal where no prejudice results, but a business owner cannot rely on that exception; an accurate, contemporaneous business valuation is the single best protection against a successful challenge.
Business Valuation in a New Brunswick Prenup
A proper business valuation prenup New Brunswick founders use should fix a baseline value as of the marriage date and specify the method for valuing future growth. Because the Marital Property Act divides the appreciation in marital property equally, documenting the pre-marriage value of the business protects that amount from a 50% claim.
Valuation is where business owner prenups succeed or fail. A marriage contract should answer four questions in writing. What is the company worth today? A Chartered Business Valuator (CBV) report dated near signing provides defensible evidence. Which valuation method applies on separation—fair market value, book value, or a formula based on revenue or EBITDA? Does the business spouse keep all future appreciation, or does the other spouse share a defined percentage? How are retained earnings, shareholder loans, and personal guarantees treated? A clause that fixes a baseline value of, for example, $400,000 at marriage and limits the other spouse's claim to 25% of growth above that figure converts an open-ended 50% exposure into a capped, predictable number. Vague clauses inviting later valuation disputes are precisely what courts scrutinize for unconscionability.
Prenup vs. No Prenup: Business Owner Outcomes Compared
With a marriage contract, a New Brunswick business owner can cap or eliminate a spouse's claim to business appreciation; without one, the Marital Property Act presumes the spouse receives 50% of the increase in value during the marriage. The difference on a business that grows $1 million can be a $500,000 swing.
| Scenario | No Prenup | With Business Owner Prenup |
|---|---|---|
| Business growth claim | Up to 50% of appreciation | Capped or excluded by contract |
| Valuation date | Determined by court | Fixed in the agreement |
| Disclosure dispute risk | High | Low (documented at signing) |
| Cost of litigation | $15,000-$75,000+ | Largely avoided |
| Outcome certainty | Court discretion (§ 7) | Pre-negotiated terms |
| Spousal support exposure | Determined at separation | Pre-defined or waived (subject to fairness) |
Courts retain discretion under Marital Property Act § 7 to order unequal division when an equal split would be inequitable, so even without a prenup a short marriage or asset dissipation can shift the result. A prenup simply moves that decision out of the courtroom.
Common-Law Business Owners and Cohabitation Agreements
Common-law business owners in New Brunswick are not covered by the Marital Property Act's equal-division rule, so a cohabitation agreement, not a marriage contract, is the correct tool. The Act applies only to married spouses, leaving unmarried partners without an automatic property claim—but also without the clarity a written contract provides.
New Brunswick differs sharply from British Columbia, Alberta, and Manitoba, which extend property-division rules to qualifying common-law couples. In New Brunswick, an unmarried partner generally cannot claim a share of the other's business under the Marital Property Act. However, that partner may still pursue claims in unjust enrichment or constructive trust if they contributed to the business—working unpaid in the company, for instance. A cohabitation agreement protects both sides: it defines the business as separate property, records any contributions and how they are compensated, and removes the uncertainty of trust litigation. If the couple later marries, a well-drafted cohabitation agreement can convert into or be replaced by a marriage contract. Business owners in committed unmarried relationships should treat a cohabitation agreement as essential, not optional.
Steps to Create a Business Owner Prenup in New Brunswick
Creating an enforceable business owner prenup in New Brunswick involves five steps, ideally completed at least 30 days before the wedding to avoid any appearance of duress. The process centers on disclosure, valuation, and independent legal advice for each spouse.
- Obtain a business valuation. Engage a Chartered Business Valuator to produce a dated report establishing the current fair market value of the company.
- Exchange full financial disclosure. Each party provides a written statement of assets, debts, income, and business interests, attaching the valuation.
- Retain separate lawyers. One lawyer drafts the agreement; the other spouse takes the draft to an independent lawyer for review, satisfying the ILA expectation under Marital Property Act § 41.
- Negotiate the business terms. Decide the baseline value, the treatment of future appreciation, retained earnings, and any spousal support provision.
- Sign with witnesses. Both parties sign in writing before a witness, meeting the statutory formalities, and each retains an original. The cost typically ranges from $1,500 to $5,000 per side depending on business complexity.