Most people across the Greater Toronto Area book their first appointment with a family lawyer during the worst week of their year. By then the decisions that mattered most were made years earlier, usually by default, and usually without anyone realising a decision was being made at all.
Ontario family law runs quietly in the background of ordinary life. Here are five moments when it stops being background, and only one of them involves a breakup.
1. Before you move in together
This is the one that catches people out. Living together in Ontario does not create a right to share property. The equalization of net family property under Part I of the Family Law Act applies to married spouses. Common law partners sit outside it, no matter how long they have been together or whose name is on the mortgage.
Support is a separate question with a separate answer. Section 29 of the Act treats partners as spouses for support purposes once they have cohabited continuously for at least three years, or are in a relationship of some permanence together and have a child. So a long common law relationship can produce a support obligation and no property claim at the same time.
A cohabitation agreement, authorised by section 53, is how a couple sets its own terms rather than inheriting that split result by accident.
2. Before you get married
A marriage contract under section 52 lets a couple decide in advance how property will be treated if the marriage ends. It earns its keep when one partner is bringing in a business, a property, an inheritance, or a significant debt.
There is one thing it cannot do. Section 52(2) says a marriage contract cannot limit a spouse’s right to possession of the matrimonial home. The home gets special treatment in Ontario regardless of whose name is on title, and an agreement drafted as though it does not will fail on that point.
The conversation is also much easier six months before a wedding than six weeks before it. Signing under time pressure is one of the arguments raised later to challenge an agreement.
3. When a relationship ends
Separation and divorce are two different things, and confusing them costs people months.
A separation agreement is a contract. It resolves property, support and parenting arrangements. A divorce is a court order that ends the marriage itself, and under section 8 of the Divorce Act the usual ground is living separate and apart for one year. You can have a signed agreement long before you are divorced, and you can be divorced with nothing else settled.
Section 55(1) of the Family Law Act sets the formal requirements for a domestic contract. It must be in writing, signed by both parties, and witnessed. Section 56(4) is the provision that decides whether it survives: a court may set a contract aside where a party failed to disclose significant assets or debts, did not understand its nature or consequences, or on ordinary contract law grounds. Full financial disclosure is not paperwork. It is the thing that makes the agreement worth having.
Not every separation needs a courtroom. Mediated and uncontested agreements handle most low and medium conflict separations in Ontario, and they are considerably faster and cheaper than litigation. An experienced family law team can usually tell you in a single consultation which route your situation actually calls for, which is worth knowing before you start paying for the wrong one.
4. When you start a business or buy in as a shareholder
Family law and business law meet here far more often than founders expect. A business interest built up during a marriage forms part of net family property, which means a spouse can hold a financial claim against the value of a company they have never worked a day at.
That is not an argument against marrying or against incorporating. It is an argument for having the shareholder agreement and the domestic contract drafted with each other in mind, so that a personal separation does not force a business restructuring. Co-founders who have never asked each other this question are carrying a risk none of them can see on the balance sheet.
5. When someone dies, or can no longer decide for themselves
Dying without a will in Ontario hands the decision to the Succession Law Reform Act, which distributes an estate in fixed shares with no regard for what anyone intended. Common law partners do not appear on that list. A surviving partner of twenty years can be left with a claim to argue rather than an inheritance to receive.
Powers of attorney matter just as much and get postponed just as often. Under the Substitute Decisions Act, 1992 you can name who manages your property and who makes your personal care decisions if you become incapable. Without those documents in place, your family may need a court appointment to do something as ordinary as paying your bills.
A will is also not a one-time job. Marriage, separation, a new child, a new property or a death in the family can all change who should inherit and who should be named executor. Reviewing the document every few years, and after any of those events, costs far less than the litigation that follows an out-of-date one.
The common thread
Four of these five moments are happy ones. Moving in together, getting married, starting a company, planning an estate. None of them feel like legal events, which is precisely why they get handled late, or not at all.
Ontario’s default rules will apply to your situation whether or not you have ever read them. The only real choice is whether you set your own terms while everyone is still on good terms, or accept the standard result later, when the conversation is much harder.
If you are approaching any of the five, go in with a list of what you own, what you owe, and what you want protected. You will get a far more useful answer than you would from a general worry.
Note: This article is general information about Ontario law and is not legal advice. Every family’s circumstances are different, and you should speak with a lawyer about yours.