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Find a Lawyer » Canada Legal Guides » Manitoba Legal Guides » Family Law & Divorce Manitoba » Marriage Contracts & Prenups Manitoba » What cannot be included in a prenuptial agreement in Manitoba?

What cannot be included in a prenuptial agreement in Manitoba?

17 Apr 2026 4 min read No comments Marriage Contracts & Prenups Manitoba
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In Manitoba, you cannot include legally binding rules about future child support or decision-making responsibility (formerly custody) in a prenuptial agreement. The Court of King’s Bench will always prioritize the best interests of the child at the time of separation, ignoring any private contracts that say otherwise.

Drafting a marriage contract (commonly known as a prenuptial agreement) is an excellent way to protect your financial future. However, many couples mistakenly believe they can control every aspect of their future separation through a private contract. If you are wondering what cannot be included in a prenuptial agreement in Manitoba, it is vital to understand that provincial and federal laws place strict limits on what spouses can privately agree upon. 🚫

Whether you live in Winnipeg, Brandon, or Dauphin, Manitoba’s family law system operates under specific rules, primarily guided by The Family Property Act and the Divorce Act. While you have broad freedom to divide property and debts, matters concerning children and fundamental fairness are closely guarded by the courts. In this guide, we will explore the boundaries of marriage contracts in Manitoba and why having a local lawyer review your document is absolutely essential. 💼

Step-by-Step Guide to Exclusions in a Manitoba Prenup

Understanding what to leave out of your agreement is just as important as knowing what to put in. Including illegal or unenforceable clauses can sometimes jeopardize the validity of the entire document. 📝

Step 1: Exclude Child Support Provisions

You cannot contract out of your legal obligation to financially support your children. In Canada, child support is the right of the child, not the parent. Any clause in a Manitoba prenuptial agreement that attempts to limit, waive, or pre-determine child support amounts will be completely ignored by the Court of King’s Bench. 💰 Judges strictly follow the Federal Child Support Guidelines based on your income at the time of separation.

Step 2: Exclude Parenting Time and Decision-Making

Similarly, you cannot dictate who gets the children if you separate. Terms like “parenting time” (visitation) and “decision-making responsibility” (custody) must be determined based on the “best interests of the child” at the exact moment the relationship ends. 👪 A contract signed years before a separation cannot predict what will be best for the children in the future.

Step 3: Be Cautious with Spousal Support Waivers

While you can legally include terms about spousal support in Manitoba, you must be extremely careful. If your agreement includes a complete waiver of spousal support, but one spouse becomes severely disabled or gives up their career to raise children, a judge might overturn that clause. ⚔️ Courts generally refuse to enforce spousal support terms that lead to unconscionable hardship or leave a former spouse relying on social assistance.

Step 4: Avoid Behavioural or “Lifestyle” Clauses

Some couples try to include penalties for infidelity, weight gain, or social media usage. These “lifestyle clauses” are highly problematic in Canadian law. Manitoba operates on a “no-fault” divorce system, meaning bad behaviour during the marriage generally does not impact property division or support. 🚩 Judges view these clauses as frivolous and rarely enforce them.

How Much Does a Proper Prenup Cost in Manitoba?

Hiring a legal professional to ensure your marriage contract only contains enforceable clauses is an investment in your peace of mind. If you try to write it yourself and include banned terms, the court fights later on will cost tens of thousands. 💵

Service TypeEstimated Cost (CAD)Description
Drafting the Contract$1,500 – $3,500+Lawyer fees to properly draft the agreement based on Manitoba law.
Independent Legal Advice (ILA)$500 – $1,500The second spouse must hire their own lawyer to review the contract.
Financial Appraisals$300 – $1,000+Cost to professionally value businesses or real estate before signing.

How Long Does the Process Take?

Do not wait until the week of your wedding. Drafting a fair and legally sound prenuptial agreement in Manitoba usually takes 1 to 3 months. 📅 This timeline allows for full financial disclosure, drafting, revisions, and giving both spouses enough time to obtain Independent Legal Advice (ILA) without feeling pressured.

Frequently Asked Questions (FAQ)

What happens if I put an illegal clause in my prenup?

Usually, the judge will simply sever (cut out) the illegal clause, such as a child support waiver, and enforce the rest of the contract. However, if the contract is riddled with unfair or illegal terms, the entire agreement could be thrown out.

Can we agree to keep our debts completely separate?

Yes. Protecting yourself from a spouse’s future debts is one of the most common and legally enforceable uses for a marriage contract in Manitoba.

Do we have to disclose all our finances?

Absolutely. If you hide assets or lie about your debts during the drafting process, the court will likely invalidate the entire marriage contract later due to lack of financial transparency.

Is a lawyer mandatory for a prenup in Manitoba?

While not strictly mandatory by statute, a prenup without Independent Legal Advice (ILA) from two separate lawyers is extremely vulnerable to being overturned by a judge. It is practically essential.

Protecting your future requires careful planning and a deep understanding of Manitoba family law. To ensure your marriage contract is rock-solid and free of unenforceable clauses, you should seek professional guidance. Browse our directory today to find a trusted Manitoba family lawyer who can protect your interests. 🔍

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