Postnuptial Agreements in Alberta: Restructuring Your Financial Arrangement After Marriage

A postnuptial agreement is a family property agreement made by spouses after they have already married, as opposed to a prenuptial agreement, which is made before the wedding. While prenuptial agreements are more commonly discussed, postnuptial agreements serve an equally important function for couples whose financial circumstances have materially changed after the marriage began, or who did not address their financial arrangements before the wedding and now wish to do so.

For high-net-worth couples in Alberta, postnuptial agreements are a sophisticated and underutilized planning tool. A significant inheritance received during the marriage, a business acquisition that creates new wealth, a major change in one spouse’s earning capacity, a restructuring of the family’s financial arrangements, or simply the belated recognition that the default property division regime does not reflect the couple’s actual intentions are all valid reasons to consider a postnuptial agreement.

This article explains what a postnuptial agreement can accomplish in Alberta, the circumstances in which one makes sense, the legal requirements for enforceability, and the specific issues that arise for couples with significant assets, business interests, or complex financial structures.

What a Postnuptial Agreement Can Accomplish in Alberta

Alberta’s Family Property Act specifically authorizes postnuptial agreements under the same framework that governs prenuptial agreements and separation agreements. A postnuptial agreement can address any aspect of the spouses’ property rights that is within the scope of the Family Property Act, including the designation of specific assets as exempt from division, the modification of the presumptive equal division regime, the treatment of future inheritances, the protection of business interests acquired during the marriage, and the establishment of support arrangements.

Circumstances in which a postnuptial agreement is commonly used by high-net-worth couples include:

• One spouse receives a significant inheritance during the marriage and wishes to protect it from division
• One spouse acquires a new business interest during the marriage, whose growth they wish to protect
• The couple’s financial circumstances have changed significantly, and the default regime no longer reflects their intentions
• One spouse is about to receive a significant equity event, such as the sale of a business or the vesting of a large option grant
• The couple wishes to provide certainty about property division without the adversarial context of separation
• One spouse is entering a high-risk business venture and wishes to protect the family’s assets from potential business creditors
• The couple wishes to restructure their financial arrangements as part of an integrated estate plan

A postnuptial agreement can also provide prospective protection for assets not yet acquired. A couple can agree in advance how a future inheritance, a future business interest, or the proceeds of a future sale will be treated under the Family Property Act, providing certainty that does not otherwise exist under the default statutory regime.

Legal Requirements for an Enforceable Postnuptial Agreement in Alberta

The enforceability requirements for a postnuptial agreement in Alberta are the same as those that apply to prenuptial agreements and separation agreements under the Family Property Act. Both parties must receive independent legal advice from their own lawyers, both lawyers must execute ILA certificates confirming that the agreement was reviewed and understood, the agreement must be entered into voluntarily without duress or undue influence, and adequate financial disclosure must have been provided by both parties.

The voluntariness requirement is particularly important in the postnuptial context. Courts have recognized that marital agreements made during the marriage involve a different dynamic than agreements made at arm’s length between strangers, and that pressure within a marriage relationship can compromise the genuine voluntariness of consent in ways that are difficult to detect from the face of the agreement. Evidence that one spouse pressed the other to sign, that the agreement was presented as a condition of continuing the marriage, or that one spouse was in a position of significantly greater financial sophistication than the other can all affect the court’s assessment of voluntariness.

Adequate financial disclosure is equally important. A postnuptial agreement made without complete disclosure of each spouse’s financial position gives the court reason to question whether the agreement reflects genuine informed consent. Both parties must know what they are agreeing to and what they are giving up before the agreement can be treated as a genuine expression of their mutual intentions.

Protecting Inheritances Through a Postnuptial Agreement

An inheritance received during the marriage is generally exempt property under the Family Property Act and is not subject to equal division on separation. However, exempt property can lose its exempt status if it becomes commingled with matrimonial property, is contributed to joint accounts, or is used in ways that destroy its separate character.

A postnuptial agreement made at the time an inheritance is received can specifically designate the inheritance as exempt property, describe how it will be held and managed to preserve its exempt status, and address what happens to any growth in value of the inherited asset during the marriage. This provides legal certainty that does not automatically exist from the fact of the inheritance alone.

For large inheritances that are invested or used to acquire real estate or other assets during the marriage, the tracing requirements for establishing exempt status on separation can be complex and costly. A postnuptial agreement that specifically addresses the inheritance at the time it is received eliminates much of the evidentiary difficulty that would otherwise arise years later.

Postnuptial Agreements and Business Interests

For a spouse who acquires a significant business interest during the marriage, whether through founding a new company, acquiring shares in an existing business, or receiving equity compensation through a professional role, a postnuptial agreement can address how that business interest will be treated if the marriage breaks down.

Without a postnuptial agreement, a business interest acquired during the marriage is generally matrimonial property subject to equal division. The growth in value of that interest during the remaining years of the marriage is similarly subject to division. For a rapidly growing business, the financial exposure from this default outcome can be very substantial.

A postnuptial agreement can designate the business interest as the property of the owning spouse, limit the other spouse’s entitlement to the value of the interest at the date of the agreement rather than its value at the date of separation, or establish a formula for calculating what portion of the business value will be subject to division if the marriage ends. Each of these approaches has different implications and requires specific legal analysis of the couple’s circumstances.

Postnuptial Agreements in the Context of Estate Planning

A postnuptial agreement can be an important component of an integrated estate plan for high-net-worth couples. The agreement can address how assets will be treated on death and upon separation, coordinate with the terms of each spouse’s will and any testamentary trusts, and address specific estate-planning concerns such as protecting assets for children from a prior relationship or ensuring that specific family heirlooms pass in a particular way.

The interaction between a postnuptial agreement and the couple’s wills must be carefully managed. Provisions in a postnuptial agreement that are inconsistent with the terms of a will can create uncertainty and dispute during estate administration. The postnuptial agreement should be reviewed alongside the will and any existing family trust arrangements to ensure that all documents work together coherently.

Frequently Asked Questions About Postnuptial Agreements in Alberta

How Keystone Legal Can Help with Postnuptial Agreements in Alberta

Keystone Legal drafts and provides independent legal advice on postnuptial agreements for high-net-worth couples across Alberta. Every postnuptial agreement engagement involves a specific analysis of the assets at issue, the couple’s financial circumstances, and the applicable legal framework.