Second Marriage Legal Planning in Ontario

A second marriage brings both the joy of a new beginning and the practical reality of greater complexity. You may have assets from your previous marriage, children who depend on you, a business you have built, or a prior separation agreement still in effect. Without the right legal planning, a second marriage can inadvertently put all of these at risk.

At Soica & Associates, our family lawyers help individuals entering second marriages put the agreements in place that allow them to move forward with confidence — protecting their assets, their children, and their financial future.

Why Legal Planning Is More Important in a Second Marriage

People entering second marriages often have significantly more at stake than they did the first time. They typically have more assets, more complex financial structures, and — often — children from a prior relationship whose interests must be protected alongside those of a new spouse. Key issues include:

Protecting children from your first relationship.

Ontario’s intestacy and family property rules do not automatically distinguish between your new spouse’s interests and the interests of children from a prior relationship. Without proper planning, assets you intended for your children can be redirected to a new spouse’s claims or consumed by property division proceedings.

Prior separation agreements.

If you have an existing separation agreement with a former spouse — particularly one containing ongoing support obligations — a new marriage can affect those obligations in complex ways. Review your prior agreement carefully with legal advice before remarrying.

Blended family dynamics.

When both partners have children from prior relationships, questions of financial support, inheritance, and asset division become significantly more complex. A clearly structured legal framework established at the outset prevents disputes later.

Business protection.

If you have built a business since your first separation, a second marriage without a marriage contract could expose that business to equalization on separation.

Accumulated assets.

People entering second marriages later in life often have substantially more assets than they did when they first married — and correspondingly more to lose without protection.

The Marriage Contract

Why a Marriage Contract Is Essential for a Second Marriage in Ontario

A marriage contract — Ontario’s equivalent of a prenuptial agreement — is the single most important legal planning tool for second marriages. It allows both partners to define their own financial arrangement rather than relying on Ontario’s default property division rules. It can be entered into before the marriage or at any time during it.

Key things a marriage contract can address for a second marriage:

Protecting pre-marriage assets.

Assets you bring into the second marriage — property, investments, a business, or savings built since your prior separation — can be protected from equalization on separation if specified in a marriage contract.

Protecting your children’s inheritance.

A marriage contract can specify that certain assets will pass to your children from a prior relationship rather than to your new spouse, ensuring your estate planning intentions are legally enforceable.

Defining spousal support obligations.

The contract can limit or establish support obligations in the event the second marriage ends, providing both parties with clarity and predictability.

Addressing the matrimonial home.

If one partner owns the home that will become the family residence, a marriage contract can address how the home will be treated on separation — including whether and how any equity appreciation will be shared. Without such a provision, the matrimonial home is fully included in the owning spouse’s NFP with no deduction for pre-marriage ownership.

A marriage contract for a second marriage must be carefully drafted to reflect specific circumstances, negotiated openly between both parties, and signed with independent legal advice on each side. Courts are more likely to uphold a contract where both parties had independent advice and where the process was transparent.

Updating Your Estate Documents

Estate Planning for a Second Marriage in Ontario

A new marriage in Ontario automatically revokes any prior will. This means that if you enter a second marriage and have not prepared a new will, you will be treated as having died without a will — with your estate distributed according to Ontario’s intestacy rules. For people with children from a prior relationship, this can produce outcomes that are the exact opposite of what they intended.

Before or immediately after your second marriage, you should:

• Prepare a new will that reflects your current family circumstances and clearly addresses the interests of children from both relationships
• Update your powers of attorney to name your new spouse or another trusted person
• Review and update all beneficiary designations on registered accounts, insurance policies, and pension plans
• Consider a testamentary trust if you have children from a prior relationship who you want to benefit from your estate after your death

The matrimonial home, registered accounts, and life insurance policies all require specific attention. A new will alone is insufficient — each asset class has its own legal mechanism, and a comprehensive review covering all of them is essential.

Effect of Second Marriage on Prior Support Obligations

Does Remarrying Affect Your Prior Spousal Support Obligations?

If you are paying spousal support to a former spouse under a court order or separation agreement, remarrying does not automatically end that obligation. However, remarriage has different consequences depending on whose remarriage it is:

Your former spouse’s remarriage

typically does end or reduce a spousal support obligation — particularly periodic support — as it is a significant change in the recipient’s circumstances. This is a basis for a variation application.

Your own remarriage

does not automatically end your obligation to a former spouse. However, a significant change in your financial circumstances — including taking on financial responsibilities for a new spouse — may support a variation application if the change is material.

Separation agreement terms control.

If your separation agreement specifically addresses the effect of remarriage on support, those terms govern. Review your agreement carefully with your lawyer before remarrying, so you understand the obligations that survive into your new marriage.

Common Law Second Relationships

If you are entering a second common law relationship rather than a legal marriage, Ontario’s equalization framework does not automatically apply. However, common law couples face their own legal risks — including unjust enrichment claims, constructive trust disputes, and support obligations — particularly where the relationship is long and the parties’ finances become intertwined.

A cohabitation agreement performs the same protective function for a common law relationship as a marriage contract does for a legal marriage. It should be entered into before cohabitation begins or as early as possible in the relationship.