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Mediation of Estate Disputes in Ontario: Mandatory Mediation

Find out when mediation is required in Ontario estate disputes, the Rule 75.1 timelines, who pays the mediator, and how to prepare for the session.

Wills & Estates4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • Rule 75.1 sends certain estate, trust and substitute decision lawsuits to mandatory mediation unless the court grants an exemption.
  • The Ontario government says the Mandatory Mediation Program operates in Toronto, Ottawa and Windsor.
  • Rule 75.1 has set timelines, including a Statement of Issues at least seven days before the session.

If you are in an estate lawsuit, you may be told the case must go to mediation. That can feel like one more hurdle when you would rather have a decision.

This article explains how mandatory mediation in estate matters works in Ontario, what the timelines look like, and how to prepare. Whether it applies to you depends on your proceeding and where it was started.

What mandatory mediation means

Mediation is a structured discussion where a neutral mediator helps the parties look for a settlement. The mediator does not decide the case.

Under Rule 75.1, certain lawsuits about estates, trusts and substitute decisions are referred to mandatory mediation unless the court grants an exemption. Rule 75.1.02(1) makes mediation mandatory in certain estates proceedings, including contested passings of accounts, claims against an estate, and proceedings under the Substitute Decisions Act, 1992.

A passing of accounts is one common way into this process. A court will not require an executor or administrator to account for the deceased's property unless a person interested in the estate or a creditor asks for it, so a beneficiary can apply to compel accounts. On a passing of accounts, the judge may inquire into any complaint or claim by any person interested in the accounts.

Where it applies

The Ontario government says the Mandatory Mediation Program operates in Toronto, Ottawa and Windsor. The rule itself sets out the areas and start dates, and those details can change, so check the current wording of Rule 75.1.02 or ask a lawyer whether your court is covered.

In the Toronto Region, the Estates List of the Superior Court of Justice hears estate, trust and capacity matters, including Rule 74 and 75 proceedings and guardianship proceedings. Procedures differ by region, so the practice direction for the court where your case will be heard is the place to look.

Where your case is heard also affects the paperwork. In the Toronto Region, a party seeking an urgent Estates List hearing must complete an Urgent Hearing Request form through the Ontario Courts Public Portal. An applicant on a passing of accounts gets a hearing date by submitting a Request Form through the same Portal. Rule 75.06 gives the court considerable discretion and flexibility to set a process for resolving a contested estate.

The timeline step by step

StepTime rule
Person who started the proceeding moves for directionsWithin 30 days after the last day for submitting a Notice of Appearance (Form 75.4)
Parties choose a mediatorWithin 30 days of the order giving directions
Mediator gives notice of the sessionAt least 20 days' notice
Each party provides a Statement of Issues (Form 75.1C)At least seven days before mediation

Missing these steps can slow a case, so keep a calendar from the date the Notice of Appearance deadline passes.

Reading the table in order helps. The first deadline belongs to the person who started the proceeding, and it runs from the last day for submitting a Notice of Appearance. Once the court gives directions, the parties have a limited window to agree on a mediator. If you are responding to a claim, check early who is responsible for each step, because different people carry different deadlines.

Cost and who pays

The court's directions order sets the cost of mediation and how it is shared. Under the program, parties pay mediators directly. If you are worried about the split, raise it when directions are sought.

Because the directions order sets how the cost is shared, the split can differ from one case to the next. Since parties pay mediators directly under the program, it is practical to ask early what the mediator's charges will be and when payment is due.

What to do next

Mediation is a chance to be heard and to test the other side's position. How it fits with the rest of your case depends on your situation, so it is worth confirming with a lawyer.

Frequently asked questions

Is mediation always required in an Ontario estate case?

No. Rule 75.1 refers certain estate, trust and substitute decision lawsuits to mandatory mediation, unless the court grants an exemption. Whether your case is covered depends on the type of proceeding and where it was started.

Which proceedings are covered?

They include contested passings of accounts, claims against an estate, and proceedings under the Substitute Decisions Act, 1992.

Who pays the mediator?

The directions order sets the cost of mediation and how it is shared, and parties pay mediators directly under the program.

What do I have to prepare?

Each party must provide a Statement of Issues (Form 75.1C) at least seven days before mediation. It helps to also gather the key documents and know your realistic goals.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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