What Happens When a Marriage Contract Conflicts With Your Will in Ontario

A marriage contract governs what happens between spouses while they're both alive, and often on separation. A will governs what happens to a person's estate on death. Most couples sign these two documents years apart, with different lawyers, for different reasons — which is exactly how a marriage contract conflicts with your will without anyone noticing until it matters.

Both documents can touch overlapping ground: what a spouse is entitled to, and what happens to specific property. When they say different things, sorting out which one controls is a real legal question, not something to assume from either document alone.

Two Documents, Two Different Purposes

A marriage contract is a Family Law Act domestic contract negotiated between spouses, typically addressing property division, support, and sometimes what happens to specific assets on death or separation. A will is a separate estate planning document that says who receives your property when you die, and who administers your estate. The two are governed by different bodies of law, and are often drafted without any reference to each other.

Where Conflicts Typically Show Up

• A release clause vs. a bequest. A marriage contract may include a spouse's release of certain claims against the other's estate, while an outdated will still leaves that same spouse a share of the estate — or the reverse, where a will assumes a release was signed when it wasn't.
• Specific property promises. A marriage contract might promise a spouse a particular asset on death, while the will leaves that same asset to someone else entirely.
• Outdated assumptions. A will drafted before the marriage contract, or before the marriage itself, may not reflect the terms the couple later negotiated.
• Silence on one side. The marriage contract addresses an issue the will doesn't mention, or the will addresses something the marriage contract never contemplated.

How This Usually Gets Sorted Out

When the two documents genuinely conflict, resolving it depends heavily on the specific wording of both, when each was signed, and what each spouse validly agreed to give up or receive. A validly signed release in a marriage contract is a real legal commitment, and it can significantly limit what a later will can effectively achieve with respect to whatever was released. Whether that's actually what happened in your case, though, is a fact-specific legal question, not something to assume from either document alone. This is exactly the kind of situation where family law and wills-and-estates advice need to work together rather than in isolation.

Keeping the Two Documents Aligned

• [ ] Review your will every time you sign or update a marriage contract, and vice versa
• [ ] Make sure any release of estate-related claims in a marriage contract is mirrored, or at least acknowledged, in the will
• [ ] Don't assume a lawyer who drafted one document automatically reviewed the other — flag both documents explicitly when you meet with either a family lawyer or a wills lawyer
• [ ] Keep copies of both documents together, with dates clearly marked, so it's obvious which was signed first
• [ ] If your circumstances change — remarriage, a new child, a major asset — revisit both documents at the same time rather than updating just one

When to Revisit Both Documents

Getting married, signing or amending a marriage contract, separating, or a major change in assets are all natural checkpoints to look at both documents together. Waiting until a dispute arises after death is the worst time to discover the two documents don't line up — by then, the person who could clarify their intentions is no longer available to do so.

Frequently asked questions