Mediation and Arbitration in Ontario: Alternatives to Court

Court is not the only path to resolving a legal dispute. For many Ontarians — business partners in conflict, neighbours in a dispute, or parties to a commercial agreement gone wrong — mediation and arbitration in Ontario offer faster, more private, and often less expensive routes to resolution.

This guide explains how each process works, where they differ from each other and from court, when mediation is actually mandatory in Ontario, and how to decide which option fits your situation.

The Landscape: What Is Alternative Dispute Resolution?

Alternative dispute resolution (ADR) is an umbrella term for processes that resolve disputes outside of, or alongside, the public court system. The two most common forms in Ontario civil matters are:

• Mediation — a facilitated negotiation where a neutral third party (the mediator) helps the parties reach a voluntary agreement. The mediator does not decide anything; the parties decide.
• Arbitration — a private adjudication where a neutral third party (the arbitrator) hears evidence and arguments and renders a binding decision. Think of it as a private judge.

There is also med-arb (mediation first, arbitration if no deal is reached) and other hybrid processes, but mediation and arbitration cover the vast majority of ADR in Ontario.

Mediation: The Assisted Negotiation

How It Works

In a typical mediation, the parties and their lawyers meet with a mediator — usually a retired judge, experienced lawyer, or trained dispute-resolution professional. Sessions may last a few hours or a full day. The mediator may meet with everyone together, or in separate "caucuses," to explore each side's underlying interests and test possible solutions.

Nothing said in mediation can be used as evidence in court unless the parties agree otherwise. This confidentiality is one of mediation's great strengths — parties can speak frankly about what they really need without fear that candid admissions will be used against them.

The Result

If the parties reach an agreement, it is typically recorded in a signed settlement agreement at the end of the session. That agreement is a binding contract. If a party later refuses to honour it, you can enforce it in court.

If no deal is reached, the case proceeds — to court or arbitration — as if the mediation never happened.

Mandatory Mediation in Ontario

Ontario requires mediation in certain civil cases before they can go to trial. As of writing, mandatory mediation applies to most defended actions (excluding family and certain other proceedings) commenced in:

• Toronto (the Toronto Region)
• Ottawa
• Windsor

In these jurisdictions, parties in a defended civil action must attend a mediation session within a prescribed period after the defence is filed. The Rules of Civil Procedure set out the timeline and process. If the parties cannot agree on a mediator, the government maintains a roster and can assign one.

Even outside mandatory-mediation jurisdictions, courts strongly encourage parties to attempt mediation, and judges may make cost orders against a party who unreasonably refuses to participate.

Arbitration: The Private Judge

How It Works

Arbitration is adjudication — the arbitrator listens to each side, weighs the evidence, and issues a decision called an award. The parties typically agree (in a contract clause before the dispute, or in a submission agreement after) that the award will be final and binding.

The Arbitration Act, 1991 (Ontario) governs domestic arbitrations in Ontario. The parties have significant flexibility to agree on the rules, the number of arbitrators, the language of the proceeding, the timeline, and the scope of the arbitrator's powers.

Binding and Final

A binding arbitration award is enforceable in Ontario courts in the same way as a court judgment. Grounds for appeal or judicial review are deliberately narrow — generally limited to issues like procedural fairness, corruption, or the arbitrator exceeding their jurisdiction. You generally cannot appeal simply because you think the arbitrator got the law wrong, unless the parties specifically agreed to allow such appeals.

This finality is both a strength (no lengthy appeals) and a risk (errors are hard to correct).

When Is Arbitration Used?

Arbitration is particularly common in:

• Commercial contracts — many business agreements contain arbitration clauses requiring disputes to be arbitrated rather than litigated.
• Construction — construction contracts often require arbitration of payment disputes.
• Employment — some employment agreements include arbitration clauses (though these are subject to limitations under employment law).
• Condominium disputes — the Condominium Act, 1998 requires arbitration for certain disputes between condominium corporations and owners.

Mediation vs. Arbitration vs. Court: A Practical Comparison

The Case for ADR

• Speed. A mediation can be scheduled within weeks. A civil trial in Ontario Superior Court can take years to reach.
• Cost. Mediation fees and a shorter overall process typically mean lower legal fees. Arbitration costs more than mediation but can still be significantly less than full litigation.
• Privacy. Court proceedings are public. ADR keeps sensitive commercial information, personal details, and settlement amounts out of the public record.
• Control. In mediation especially, the parties shape the outcome — creative solutions that a court cannot order (such as an ongoing business relationship, a reference letter, or a payment plan) become possible.

The Limits of ADR

ADR is not always the right fit:

• If you need an urgent injunction (a court order to stop someone doing something right now), you need the court.
• If the other side won't cooperate, mediation requires willingness from both sides to participate meaningfully.
• If you need to set a public precedent or establish a point of law, a court judgment carries weight that an arbitration award does not.
• Some matters — certain family law issues, criminal charges — cannot be arbitrated.

Choosing a Mediator or Arbitrator

Look for a neutral with subject-matter expertise in your type of dispute. ADR bodies such as ADR Chambers and ADRIC maintain rosters of accredited neutrals in Ontario. Costs vary by the neutral's experience and the complexity of the dispute. As of writing, a single-day commercial mediation with an experienced mediator can cost several thousand dollars to split between the parties — still typically far less than a trial.

Frequently asked questions