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Prenup for a Second Marriage in Alberta: Protecting Children and Assets

See how a prenup can protect children, a home and a pension in a second marriage in Alberta, and what child support and parenting rules it cannot override.

Family Law4 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 13, 2026
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Key takeaways
  • A prenup that meets the Family Property Act requirements can set how property is divided if the marriage ends, including property you own now or acquire later.
  • A prenup cannot fix child support or parenting arrangements in advance, because the court applies the child's best interests and the guidelines.
  • A spousal support waiver is allowed by statute but can be overridden in limited circumstances, including where a spouse had no independent legal advice and the agreement is inequitable.

When you remarry, you often bring a home, savings, a pension or children from an earlier relationship. A prenup is one way to plan for what happens to those assets if the new marriage ends.

It is also important to know its limits. Some matters, especially those involving children, are not something two adults can settle in advance.

This article covers the law of Alberta.

What a prenup can do for property

Without an agreement, property acquired during the marriage that is not exempt is distributed equally unless that would not be just and equitable. Exempt property, such as gifts from third parties, inheritances and property acquired before the marriage, is excluded at market value, though the Court distributes in a just and equitable manner any increase in its value.

A written agreement that is enforceable replaces those default rules for the property it covers. It can set out how property is distributed on separation or on dissolution of the marriage, and it can cover property owned at signing or acquired later. That makes it a tool for a home you bring into the marriage or assets you want kept for your children. How a pension is treated depends on the details, so ask a lawyer how to describe it in the agreement.

Making it enforceable

If these steps are missed, the default rules can apply and the Court may only treat the agreement's terms as one factor. An agreement is also unenforceable by a spouse who knew or had reason to believe the marriage was void when it was made.

What a prenup cannot override: children

Child support is set under the Child Support Guidelines, not by the parents' private agreement alone. A written child support agreement does not prevent anyone from applying for a child support order, and a child support order ends any earlier agreement.

Parenting is decided on the child's best interests, and parents cannot bind the court in advance on parenting time or decision-making. Before varying a parenting order, the court must be satisfied that the child's needs or circumstances have changed. A prenup can't lock in a parenting schedule for children from either of your earlier relationships.

What a prenup cannot guarantee: spousal support

Spouses may agree in writing that one releases the other from liability for support. But a court may not make a different support order unless it is satisfied the agreement is inequitable and one of the listed circumstances exists. One is that the person challenging it signed without independent legal advice.

Even a waiver that follows the formalities is weighed against the objectives of the Divorce Act, such as relieving economic hardship. Complete waivers are described as often fairly easily overridden or set aside, especially where there are children. Treat any support term with caution.

What to do next

Frequently asked questions

Can a prenup keep my home for my children?

It can set out how property is distributed if the marriage ends, including property owned at signing. It must meet the formal requirements to replace the default rules. Planning for your children after death is a separate question for a lawyer.

Can we agree on child support in the prenup?

You may sign a written child support agreement, but it does not stop anyone from applying for an order. The amount is set by the Child Support Guidelines.

Can a prenup set parenting time?

No. The court considers only the child's best interests, and parents cannot bind it in advance. A parenting term in a prenup has no binding force over that assessment.

Does the prenup need to say it lasts after the wedding?

Yes. An agreement made before marriage is unenforceable after it unless the agreement makes clear the parties intended it to apply or continue to apply.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Alberta laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in Alberta. Reach us at 1-844-900-1070 or send our Team a message.

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