Divorce itself is federal law, but in Ontario the property, court, and process rules that shape your negotiation are provincial — and a few of them work differently than almost anywhere else in Canada.
The Divorce Act (federal) ends the marriage, but property division in Ontario runs through the province's Family Law Act, using a formula called net family property (NFP) equalization. Each spouse calculates the value of everything they own on the date of separation, subtracts what they owned on the date of marriage (with some exclusions), and the spouse with the higher NFP pays half the difference to the other. It's an equalization payment, not a physical division of assets — so it's common in Ontario for one spouse to keep the house and the other to receive an equivalent payment or offsetting assets instead.
One detail that trips people up: Ontario values property as of the date of separation, not the date of trial or settlement. That means the valuation date itself can become a point of dispute — if asset values moved a lot between separation and now, both sides have an incentive to argue about exactly when 'separation' happened. Most divorce and property matters proceed through the Superior Court of Justice, though in some regions the file goes through a unified Family Court branch; smaller support or parenting-only matters can sometimes be heard in the Ontario Court of Justice. There are also time limits for bringing an equalization claim, so this isn't something to leave indefinitely — confirm current deadlines with a family lawyer or the Ontario court website.
The matrimonial home gets treatment in Ontario that surprises a lot of people, and it's worth understanding early because it changes how you should read any letter that mentions the house. Normally, property you owned before the marriage is deducted from your NFP — you don't have to share the value you brought in. The matrimonial home is the exception: if the home you and your spouse lived in at separation was owned by one of you before the marriage, that pre-marriage value is not deductible. In effect, the full value of the matrimonial home at separation is on the table for equalization, regardless of who bought it or when.
There's a related trap with excluded property like gifts and inheritances. Normally those amounts are excluded entirely from equalization. But if that money was used to buy, renovate, or pay down the matrimonial home, the exclusion can be lost. If a letter references an inheritance that went into the house, or a home owned by one spouse before the relationship, that's exactly the kind of fact worth flagging and tracking with its supporting documents rather than letting it get glossed over in correspondence.
Ontario's disclosure expectations are detailed, and preparing early is free leverage. Start pulling together: three years of tax returns and notices of assessment; recent pay statements; statements for every bank, investment, RRSP, TFSA, and pension account; mortgage and property tax records for any real estate, including anything owned before the marriage; and corporate or business financials if either spouse is self-employed or owns a company. Because the valuation date matters so much in Ontario, try to establish account and property values as close to the separation date as possible — old statements from around that time are worth tracking down now, before they're harder to find.
If a gift, inheritance, or pre-marriage asset is part of the picture, gather the paper trail showing where that money came from and where it went. Given the matrimonial-home exclusion rules above, tracing this correctly can materially change the equalization outcome.
Ontario requires most parties starting a family court case — including many divorce and parenting matters — to attend a Mandatory Information Program (MIP) session before the case can move to a case conference. MIP is a short group session, typically offered in person or virtually through the court, covering the separation process, options like mediation, and the effects of conflict on children. It's procedural, not optional in most contested cases, so it's worth booking early rather than treating it as a formality to deal with later.
Parenting matters follow the best-interests-of-the-child standard, and child support generally follows the Federal Child Support Guidelines and the applicable table amount based on income and the number of children. As elsewhere, courts and mediators respond better to specific, concrete parenting proposals than vague ones.
1) Build your disclosure binder now, prioritizing values as close to your actual separation date as possible, since that date anchors the whole equalization calculation. 2) Flag anything related to the matrimonial home immediately — pre-marriage ownership, inheritances or gifts used toward it, renovations — and gather the tracing documents. 3) Get independent legal advice early; even one consultation can clarify how the equalization formula applies to your specific assets. 4) Check whether a Mandatory Information Program session is required in your case and book it rather than waiting. 5) Track every letter and every date it sets — Ontario correspondence often proposes valuation dates, disclosure deadlines, or settlement terms, and losing track of who proposed what can cost you later.
Not exactly. Ontario uses net family property equalization: each spouse's net gain during the marriage is calculated, and the spouse with the higher amount pays half the difference to the other, rather than physically dividing every asset in half.
It can matter less than you'd expect. Ontario generally does not allow a deduction for a matrimonial home's pre-marriage value the way it does for other property, so the full value at separation is often part of the equalization calculation regardless of who owned it first. Confirm the specifics with a family lawyer.
In most contested family cases, yes — Ontario generally requires attendance at a Mandatory Information Program session early in the court process. Check with your local courthouse or the Ontario court website for how and when to book it.
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This guide is general information, not legal advice. Laws change and differ by jurisdiction — confirm specifics with a local family lawyer or your court's official website. If you use SortMyDivorce, your letters stay confidential — never shared, never sold.