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Family Court Fees in Ontario: Filing, Motion and Trial Costs

Understand the money side of Ontario family court: filing and motion steps, witness fees, mediation charges and costs orders, and where to confirm amounts.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • Court fee amounts are set by the court system and change, so confirm the current figure with the court office before you file.
  • A party who summons a witness with Form 23 must pay that witness for every day the witness is required in court.
  • Costs orders are separate from filing fees: a successful party is presumed to be entitled to costs of a step.

Before you file or respond in Ontario family court, you probably want a clear picture of what each step will cost. The answer has several parts: fees paid to the court, other charges along the way, and the separate question of who pays whose costs at the end.

This article explains where money comes into the process and how to find the current amounts. Dollar figures change over time, so it deliberately points you to the court office rather than listing numbers that may be out of date.

Three different kinds of money

People often mix these up, so it helps to separate them.

Lawyer fees are a fourth category and are agreed between you and your lawyer. They are not court fees.

Where fees can arise at each step

StepWhat to know
ApplicationA case starts with the forms the court requires. Respondents answer using Form 10 within 30 days of being served. Ask the court office for the current fee.
MotionForms are served at least 6 business days before the motion date and filed with Form 6B at least 4 business days before. Confirm any fee with the court office.
Motion to changeUses Form 15, plus Form 35.1 for parenting or Forms 13 and 13A for support. Confirm the fee for your court.
Trial recordThe applicant serves it at least 20 calendar days before trial. Ask what fees apply at this stage.

Which fees apply can depend on the court. Procedure differs between the Ontario Court of Justice, the Family Court branch of the Superior Court of Justice and the regular Superior Court of Justice, so always check with the court where you are filing.

Other charges you may meet

Service of a motion to change must be done by special service by someone other than you who is at least 18 years old. Depending on how you arrange this, there may be a cost.

Witnesses cost money too. A party who summons a witness with Form 23 must pay the witness for every day the witness is required in court. For orders affecting a non-party, the person must be served with the notice of motion, a summons (Form 23) and the witness fee.

Mediation varies. Free on-site mediation is available at family courts on the day a matter is scheduled for court, while off-site mediation may charge user fees on a scale based on income and number of dependants.

Costs orders: who pays at the end

There is a presumption that a successful party is entitled to the costs of a step in a case, and the court decides costs promptly after each step or reserves them for later. If success is divided, the court may apportion costs as appropriate. A winner who behaved unreasonably may be deprived of all or part of their costs.

In child protection cases, the presumption that the successful party gets costs does not apply. Where a party acted in bad faith, costs must be decided on a full recovery basis and are payable immediately.

When setting the amount, the court may look at time spent, written offers, legal fees and rates, expert fees and other properly paid expenses, and claims must be supported by satisfactory documentation. Before each step, parties must confer about costs or make best efforts to do so, unless a court order prohibits it or there is a risk of domestic violence.

What to do next

Free help exists. Family Law Information Centres give information about court processes, and duty counsel may give 20 minutes of free advice at family courthouses, whether or not you are eligible for legal aid.

Frequently asked questions

How much does it cost to file in Ontario family court?

The amount depends on the form and the court, and fees change over time. Call or visit the court office where you will file to get the current figure.

Do I have to pay the other side's costs if I lose?

There is a presumption that the successful party is entitled to costs of a step, but the court can apportion costs if success is divided. The result depends on your case.

Is mediation free?

Free on-site mediation is available at family courts on the day a matter is scheduled for court, while off-site mediation may charge fees on a scale based on income and number of dependants.

Who pays a witness I summons?

A party who summons a witness with Form 23 must pay the witness for every day the witness is required in court.

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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