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№ 77 Family Law

Can a Prenup Waive Spousal Support in Alberta?

Find out whether a prenup can waive spousal support in Alberta, when a court can override the clause, and how the Divorce Act treats these waivers.

Family Law5 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 1, 2026
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Key takeaways
  • Alberta law allows spouses to agree in writing that one releases the other from spousal support.
  • Under Alberta's Family Law Act, a court can depart from a support agreement only if it is inequitable and a listed circumstance exists, such as no independent legal advice, while a divorce court weighs the agreement under the Divorce Act.
  • Complete waivers are often fairly easily overridden or set aside, especially where there are children.

Many people who sign a marriage contract want to limit or exclude spousal support. The idea is simple: if the relationship ends, neither of you can claim support from the other.

The law is less simple. A waiver is permitted, but courts keep some power to look at it again. This article explains how Alberta law and the Divorce Act treat these clauses.

This article covers the law of Alberta.

What the law allows

Under Alberta's Family Law Act, spouses or adult interdependent partners may enter into a written agreement in which one agrees to pay support or one agrees to release the other from liability for support. So a spousal support waiver is permitted by statute, but it is subject to section 62(3).

A support agreement also has limits. It cannot vary an existing spousal or adult interdependent partner support order.

When a court can depart from the agreement

Under the Family Law Act, a court may not make a spousal support order that differs from the agreement unless it is satisfied that the agreement is inequitable and one of the listed circumstances exists. Under that Act's test, both parts are needed. If you are divorcing, the Divorce Act sets out a different weighing approach, described in the next section.

This independent legal advice ground is a different test from the one for property agreements. A property agreement needs a lawyer-witnessed written acknowledgment under the Family Property Act, while the support ground asks whether the challenging spouse received independent legal advice.

How the Divorce Act approaches support waivers

If you divorce, a court can order lump-sum or periodic spousal support on application. It takes into account the condition, means, needs and other circumstances of each spouse, including any order, agreement or arrangement relating to support. So the agreement is an important factor, but it is not the only one.

A support order should recognize economic advantages or disadvantages from the marriage or its breakdown, apportion the financial consequences of child care, relieve economic hardship, and as far as practicable promote economic self-sufficiency within a reasonable time. A waiver is weighed against these objectives. The court does not consider misconduct of a spouse in relation to the marriage.

Justice Canada's Spousal Support Advisory Guidelines guide says the Guidelines give no power to invalidate or override prior agreements. It also says final agreements such as a waiver are treated differently from those with a variation or review clause, and complete waivers are often fairly easily overridden or set aside, especially where there are children.

What courts look at in practice

Courts applying the Miglin approach consider whether the agreement substantially complied with the objectives of the Divorce Act at the time of negotiation, and whether the result still reflects the parties' intentions in current circumstances. Hardship for the support claimant makes departure more likely.

FactorEffect on a waiver
Children of the relationshipComplete waivers are often more easily overridden
Hardship to the person claimingDeparture is more likely
Review or variation clauseTreated differently from a final waiver
Child support claimGiven priority; spousal support may be lower or none, with reasons recorded

What a prenup cannot settle on its own

Spousal support is only one part of a separation, and a prenup does not decide everything else. Child support is set under the applicable guidelines, not by the parents' private agreement alone. Under Alberta's Family Law Act, a parent may enter into a written child support agreement, but it does not prevent anyone from applying for a child support order, and a child support order ends any earlier child support agreement.

If you are thinking about a waiver, it helps to keep these pieces separate. How each one applies depends on your situation, so it is worth confirming with a lawyer.

What to do next

Frequently asked questions

Is a spousal support waiver in a prenup automatically valid?

No. It is permitted by statute, but a court can depart from it if it is inequitable and a listed circumstance exists. In a divorce, the court also weighs the waiver against the objectives of the Divorce Act.

Does a lack of independent legal advice matter?

It can. A support agreement can be overridden if the spouse challenging it entered into it without independent legal advice and the agreement is inequitable.

Can a prenup control support if we already have a support order?

No. A spousal support agreement cannot vary an existing spousal or adult interdependent partner support order.

Does having children change how a waiver is treated?

It can. Justice Canada's guide describes complete waivers as often fairly easily overridden or set aside, especially where there are children. A court considering both child and spousal support gives priority to child support.

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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