ONCA Factum Template

Last Updated: May 8, 2026
Data Source: 5,034 Ontario Court of Appeal decisions (2020-2026)

Quick Facts

📄 Page Limit: 40 pages maximum (appellant/respondent), 20 pages (leave motions), 10 pages (reply)
⚖️ Purpose: Presents your legal arguments in written form for judges to read before oral hearing
💼 Technical Skill Required: VERY HIGH - This is the most important document in your appeal
⏱️ Timeline: Due 60 days after filing Notice of Appeal
📊 Impact: Judges read factums before hearing - this is your chance to persuade them

What is a Factum?

A factum is your written legal argument. It:

✅ States the facts (briefly, from your perspective)
✅ Identifies the legal issues on appeal
✅ Presents your legal arguments with case law support
✅ Tells the court what order you want and why

⚠️ CRITICAL: The factum is MORE IMPORTANT than oral argument. Judges read it in advance and form preliminary views. If your factum is weak, oral argument cannot save you.

Key Requirements (ONCA Rules of Civil Procedure)

Format Rules:

Font: Times New Roman, size 12, or Arial size 11
Line Spacing: Double-spaced (except for quotations, which can be single-spaced and indented)
Margins: 1 inch (2.5 cm) minimum on all sides
Page Limit: 40 pages max for main factum, 10 pages for reply factum
Citations: Must use neutral citations (e.g., 2023 ONCA 456) when available
Tabs: All factums must be tab-indexed with Part I, Part II, etc. clearly marked

Content Requirements:

Part I: Overview and Facts
Part II: Issues
Part III: Arguments
Part IV: Order Sought

Fill-in-the-Blank Factum Template

COURT FILE NO.: C-[FILE NUMBER]

ONTARIO COURT OF APPEAL

BETWEEN:

[YOUR NAME]
Appellant

- and -

[RESPONDENT NAME]
Respondent

═══════════════════════════════════════════════════════

FACTUM OF THE APPELLANT

═══════════════════════════════════════════════════════

PART I — OVERVIEW AND FACTS

A. Overview

1. This appeal concerns [ONE SENTENCE DESCRIPTION OF WHAT APPEAL IS ABOUT - e.g., "the interpretation of 'loss of earnings' under section 43 of the *Workplace Safety and Insurance Act*"].

2. The appellant seeks to overturn the decision of [DIVISIONAL COURT / SUPERIOR COURT] dated [DATE], which [WHAT THE LOWER COURT DID - e.g., "dismissed the appellant's judicial review application and upheld the Workplace Safety and Insurance Appeals Tribunal's denial of loss of earnings benefits"].

3. The central issue is whether the Tribunal erred in law by [STATE THE LEGAL ERROR - e.g., "requiring the appellant to prove permanent unemployability rather than applying the correct test of 'loss of earnings capacity due to the workplace injury'"].

4. The appellant submits that [YOUR POSITION IN ONE SENTENCE - e.g., "the Tribunal's interpretation contradicts the plain wording of the statute and 40 years of consistent case law, and the appeal should therefore be allowed"].

B. Facts

[NOTE: State facts NEUTRALLY and BRIEFLY. This is not argument. Cite to record: "Appeal Book (AB), Tab X, p. Y" or "Tribunal Decision (TD), para. Z"]

5. The appellant, [YOUR NAME], was employed as a [JOB TITLE] for [EMPLOYER NAME] from [START DATE] to [END DATE]. [AB, Vol. I, Tab 3, p. 45]

6. On [INJURY DATE], the appellant suffered [INJURY DESCRIPTION] while [ACTIVITY]. [TD, para. 10]

7. [TREATING DOCTOR NAME], the appellant's treating [SPECIALTY] physician, diagnosed [DIAGNOSIS] and opined that the injury arose from [CAUSATION STATEMENT]. [AB, Vol. II, Tab 8, p. 112]

8. [KEY FACT 2 - e.g., "The appellant returned to modified duties on [DATE] but was unable to continue due to ongoing symptoms"]. [TD, para. 15]

9. [KEY FACT 3 - e.g., "WSIB initially accepted the claim and paid benefits from [DATE] to [DATE]"]. [AB, Vol. I, Tab 5, p. 67]

10. [KEY FACT 4 - e.g., "On [DATE], WSIB terminated benefits on the basis that the appellant had recovered sufficiently to return to pre-injury work"]. [WSIB Decision Letter, AB, Vol. II, Tab 10, p. 145]

11. The appellant appealed to WSIAT. The WSIAT decision, dated [DATE], dismissed the appeal. [TD, para. 75]

12. The Tribunal found that [TRIBUNAL'S KEY FINDINGS - state neutrally]. [TD, paras. 45-50]

13. The appellant sought judicial review in the Divisional Court. On [DATE], the Divisional Court dismissed the application. [Divisional Court Reasons (DCR), para. 40]

14. The Divisional Court held that [LOWER COURT'S REASONING]. [DCR, paras. 25-30]

15. The appellant was granted leave to appeal by order of this Court dated [DATE].

PART II — ISSUES

16. The issues on this appeal are:

    (a) Did the Divisional Court err in law by applying the wrong standard of review to the Tribunal's interpretation of [STATUTORY PROVISION]?

    (b) Did the Tribunal err in law by misinterpreting [STATUTORY PROVISION] as requiring [INCORRECT INTERPRETATION] rather than [CORRECT INTERPRETATION]?

    (c) Did the Tribunal breach procedural fairness by [SPECIFIC UNFAIRNESS]?

    [ADD ADDITIONAL ISSUES IF APPLICABLE]

PART III — ARGUMENTS

ISSUE 1: THE DIVISIONAL COURT ERRED IN LAW BY APPLYING THE WRONG STANDARD OF REVIEW

17. The Divisional Court erred by reviewing the Tribunal's interpretation of section [X] of the *[Statute Name]* on a standard of **correctness**, when the presumptive standard is **reasonableness**.

18. In *Canada (Minister of Citizenship and Immigration) v. Vavilov*, 2019 SCC 65, the Supreme Court held that reasonableness is the presumptive standard for reviewing administrative decisions, including questions of law. *Vavilov*, at para. 23.

19. The presumption of reasonableness applies even to questions of statutory interpretation, unless:
    
    (a) A legislatively prescribed standard applies (*Vavilov*, para. 34); or
    
    (b) The rule of law requires correctness review (e.g., constitutional questions, general law questions, jurisdictional boundaries between tribunals) (*Vavilov*, paras. 53, 62-64).

20. Neither exception applies here. The question concerns the interpretation of [PROVISION] of the *[Statute Name]*, which falls squarely within WSIAT's specialized expertise. There is no legislative mandate for correctness review, and the issue is not a general law question.

21. The Divisional Court's application of correctness review was therefore an error of law. *Vavilov*, at para. 37 ("[T]he choice of standard of review is itself reviewable").

22. [OPTIONAL - IF LOWER COURT CITED INCORRECT CASE LAW]: The Divisional Court relied on *[Old Case Name]*, which predates *Vavilov* and applied the now-discredited "true question of jurisdiction" doctrine rejected in *Vavilov*. [Cite DCR paragraph]

23. [CONSEQUENCE OF ERROR]: This error is material because applying the correct standard of reasonableness would have revealed that the Tribunal's interpretation, while perhaps not the only possible interpretation, was within the range of reasonable outcomes. See Issue 2, below.

ISSUE 2: THE TRIBUNAL ERRED IN LAW BY MISINTERPRETING [STATUTORY PROVISION]

A. The Statutory Framework

24. Section [X] of the *[Statute Name]* provides:

    "[QUOTE THE RELEVANT STATUTORY PROVISION IN FULL - USE OFFICIAL CITATION]"

25. The purpose of this provision, as stated in *[Case establishing purpose]*, is to [STATE LEGISLATIVE PURPOSE]. *[Case Name]*, at para. [X].

26. [OPTIONAL - LEGISLATIVE HISTORY]: The provision was amended in [YEAR] to [DESCRIBE AMENDMENT], which demonstrates the legislature's intent to [INTENT]. See *[Case interpreting amendment]*, at para. [X].

B. The Tribunal's Interpretation

27. The Tribunal interpreted section [X] to mean [SUMMARIZE TRIBUNAL'S INTERPRETATION]. [TD, para. X]

28. Specifically, the Tribunal held that [SPECIFIC HOLDING THAT YOU CHALLENGE]. [TD, para. X]

29. This interpretation is [UNREASONABLE / INCORRECT] because it:
    
    (a) Contradicts the plain wording of the statute;
    
    (b) Produces absurd or unjust results;
    
    (c) Conflicts with binding precedent; and
    
    (d) Undermines the statutory purpose.

C. The Correct Interpretation

30. **Plain wording**: The statute states "[QUOTE KEY WORDS]". The ordinary meaning of "[KEY WORD]" is [DEFINITION - cite dictionary if needed]. The Tribunal's interpretation requires reading in words that are not present.

31. In *[Case on statutory interpretation]*, this Court held that "[PRINCIPLE - e.g., 'courts should not add words to a statute that the legislature did not include']". *[Case]*, at para. [X].

32. **Absurd results**: The Tribunal's interpretation leads to [DESCRIBE ABSURD OUTCOME]. For example, under the Tribunal's logic, [HYPOTHETICAL SHOWING ABSURDITY].

33. The Supreme Court has repeatedly held that interpretations producing absurd results should be rejected. *Rizzo & Rizzo Shoes Ltd. (Re)*, [1998] 1 SCR 27, at para. 27.

34. **Conflict with precedent**: The Tribunal's interpretation contradicts [ONCA OR SCC CASE] in which this Court held that [PRINCIPLE FROM CASE].

35. In *[Case Name]*, the Court considered a similar provision and concluded that [HOLDING]. *[Case]*, at para. [X]. The Tribunal's decision does not cite *[Case]* and offers no explanation for departing from it.

36. **Statutory purpose**: The purpose of section [X], as discussed above, is to [PURPOSE]. The Tribunal's interpretation undermines this purpose by [HOW IT UNDERMINES PURPOSE].

37. For these reasons, the Tribunal's interpretation is unreasonable and cannot stand.

ISSUE 3: THE TRIBUNAL BREACHED PROCEDURAL FAIRNESS

38. The Tribunal denied the appellant procedural fairness by [SPECIFIC UNFAIRNESS - e.g., "relying on the medical opinion of Dr. [X] without disclosing this opinion to the appellant or providing an opportunity to respond"].

39. The duty of fairness is a well-established principle of administrative law. *Baker v. Canada (Minister of Citizenship and Immigration)*, [1999] 2 SCR 817, at paras. 21-22.

40. The content of the duty varies with context, but includes, at minimum:
    
    (a) Notice of the case to be met;
    
    (b) An opportunity to respond; and
    
    (c) A decision by an impartial decision-maker.
    
    *Baker*, at paras. 23-28.

41. [STATE SPECIFIC FACTS SHOWING BREACH]. For example:
    
    - The Tribunal's decision cites Dr. [X]'s report at paragraph [Y], stating that [QUOTE].
    
    - This report was not disclosed to the appellant prior to the hearing.
    
    - At the hearing, the appellant had no opportunity to cross-examine Dr. [X] or file responding medical evidence.
    
    - [TD, para. X; AB, Hearing Transcript, Vol. III, p. 450]

42. This Court has held that "[QUOTE PRINCIPLE ABOUT PROCEDURAL FAIRNESS FROM CASE]". *[Case Name]*, at para. [X].

43. The breach is material because [EXPLAIN PREJUDICE - e.g., "had the appellant known of Dr. [X]'s opinion, the appellant would have filed a responding report from Dr. [Y], a specialist in [FIELD], who has opined that [CONTRARY OPINION]"]. [AB, Vol. IV, Tab 20, p. 567 - affidavit of appellant]

44. The breach requires the decision to be set aside. *Cardinal v. Director of Kent Institution*, [1985] 2 SCR 643, at para. 23 ("[T]here is a duty to act fairly... [and] a failure to comply with it constitutes a denial of natural justice").

PART IV — ORDER SOUGHT

45. The appellant respectfully requests that this Honourable Court:

    (a) Allow the appeal;

    (b) Set aside the order of the Divisional Court dated [DATE];

    (c) [PRIMARY RELIEF - e.g., "Declare that the Tribunal's decision was unreasonable and of no force or effect"];

    (d) [ALTERNATIVE RELIEF - e.g., "In the alternative, remit the matter to WSIAT for reconsideration in accordance with these reasons"];

    (e) Award costs of this appeal and the proceedings below to the appellant; and

    (f) Grant such further and other relief as this Honourable Court deems just.

ALL OF WHICH IS RESPECTFULLY SUBMITTED this [DATE].

_________________________________
[YOUR NAME OR LAWYER NAME]
[LAW SOCIETY # if applicable]

Lawyer for the Appellant
[FIRM NAME]
[ADDRESS]
[PHONE]
[EMAIL]

═══════════════════════════════════════════════════════

SCHEDULE "A" — AUTHORITIES CITED

[LIST ALL CASES CITED IN NUMERICAL ORDER WITH FULL CITATIONS]

1. *Athey v. Leonati*, [1996] 3 SCR 458

2. *Baker v. Canada (Minister of Citizenship and Immigration)*, [1999] 2 SCR 817

3. *Canada (Minister of Citizenship and Immigration) v. Vavilov*, 2019 SCC 65

4. *Cardinal v. Director of Kent Institution*, [1985] 2 SCR 643

5. *Rizzo & Rizzo Shoes Ltd. (Re)*, [1998] 1 SCR 27

[CONTINUE LIST...]

═══════════════════════════════════════════════════════

SCHEDULE "B" — STATUTES CITED

[LIST ALL STATUTES CITED WITH SPECIFIC SECTIONS]

1. *Courts of Justice Act*, R.S.O. 1990, c. C.43, s. 19(1)(b)

2. *Workplace Safety and Insurance Act, 1997*, S.O. 1997, c. 16, Sch. A, ss. 13(1), 43, 126(1)

[CONTINUE LIST...]

Page Budget Strategy (40-Page Limit)

Allocate your 40 pages wisely:

Section	Recommended Pages	Purpose
Part I - Overview	1-2 pages	Hook the judges - state your case clearly
Part I - Facts	3-6 pages	Tell your story concisely with record citations
Part II - Issues	0.5-1 page	List issues clearly - judges will refer back to this
Part III - Arguments	25-30 pages	Your main legal arguments - most important section
Part IV - Order Sought	0.5-1 page	What you want the court to do
Schedules	Not counted	List of authorities and statutes

💡 TIP: If you have 3 grounds of appeal, allocate ~10 pages each. If one ground is stronger, give it more space.

Writing Style Tips

✅ DO:

Use topic sentences - First sentence of each paragraph states the point
Cite to record constantly - Every factual assertion needs a citation
Quote sparingly - Paraphrase case law unless exact wording is critical
Use headings - Break up text with clear sub-headings (A, B, C, etc.)
Anticipate counter-arguments - Address respondent’s likely arguments
Emphasize binding precedent - ONCA/SCC cases carry more weight than lower courts

❌ DON’T:

Argue in the facts section - Save argument for Part III
Overquote - Judges want your analysis, not copy-pasted paragraphs from cases
Make personal attacks - Attack the legal reasoning, not the judge/tribunal
Use inflammatory language - “The Tribunal’s outrageous decision” → “The Tribunal erred”
Repeat yourself - Make each point once, clearly
Bury your best argument - Lead with your strongest ground

Sample Paragraph (Well-Written)

Good Example:

30. The Tribunal’s interpretation contradicts the plain wording of section 43(1). The provision states that a worker is entitled to loss of earnings benefits if the injury “results in a loss of earnings” (emphasis added). Workplace Safety and Insurance Act, s. 43(1). The ordinary meaning of “results in” denotes a causal connection between injury and wage loss. Rizzo & Rizzo Shoes, at para. 27. The Tribunal, however, required the appellant to prove “permanent unemployability” — a term that appears nowhere in the statute. TD, para. 45. This interpretation adds words the legislature did not include and imposes a significantly higher threshold than the statutory text supports.

✅ Why it’s good:

Topic sentence states the point clearly
Quotes statute precisely
Cites case law appropriately
Identifies specific error with record citation
Explains why the error matters

Bad Example:

30. The decision is wrong. The law says I should get benefits if I lose earnings. The Tribunal said I needed to be permanently unemployable. That’s not fair and makes no sense. I clearly lost earnings because I couldn’t work after my injury. The Tribunal should have given me benefits.

❌ Why it’s bad:

No topic sentence
Vague references (“the law says”) - no citation
Argumentative tone (“that’s not fair”)
No case law cited
Sounds like an emotional plea, not a legal argument

Common Mistakes to Avoid

Mistake	Why It’s Fatal	How to Fix
No record citations	Judges assume you’re making facts up	Cite to AB/TD/DCR for every factual assertion
100+ page factum	Violates page limit - court may refuse to file it	Cut ruthlessly - focus on strongest 2-3 arguments
Arguing facts	ONCA defers to trial judge/tribunal on facts	Frame as legal error (“Tribunal applied wrong test”) not factual disagreement (“Tribunal should have believed me”)
No case law	Court needs precedent to support your position	Cite at least 3-5 binding ONCA/SCC cases per ground
Missing Schedule A	Court can’t verify your authorities	List every case cited with full citation

After Filing: Oral Argument Prep

Your factum is not the end — you’ll also argue orally (typically 30-60 minutes). Tips:

Know your factum cold - Judges will ask “Where in your factum do you address X?”
Lead with your strongest argument - You may not get to argument #3
Answer questions directly - Don’t evade tough questions with “I’ll get to that later”
Use your time wisely - If judges focus on Issue 1, spend time there (they’re interested)
Have a “30-second pitch” - If judges say “We’ve read your factum, what’s your best point?”, be ready

Leave to Appeal Application Template - For seeking permission to appeal
Notice of Appeal Template - Required before factum
ONCA Appellate Guide - Complete guide to ONCA procedure
ONCA Precedent Overview - Analysis of 5,034 decisions to identify winning arguments
CanLII ONCA Database - Search 5,034 ONCA cases for precedent

Important Disclaimers

⚠️ HIRE A LAWYER: Factum writing requires advanced legal training. This template provides structure but cannot replace professional legal representation.

⚠️ SUCCESS RATE: Only 13.2% of ONCA appeals succeed. A well-written factum is necessary but not sufficient.

⚠️ PAGE LIMITS ARE STRICT: ONCA will refuse to file overlong factums. Stay under 40 pages.

⚠️ DEADLINES MATTER: Late factums can result in dismissal for delay. File 60 days after Notice of Appeal.

Last Updated: May 8, 2026
Data Source: 5,034 ONCA decisions scraped from CanLII (2020-2026)
Maintained by: 3mpwr App

ONCA Factum Template

ONCA Factum Template

Quick Facts

What is a Factum?

Key Requirements (ONCA Rules of Civil Procedure)

Format Rules:

Content Requirements:

Fill-in-the-Blank Factum Template

Page Budget Strategy (40-Page Limit)

Writing Style Tips

✅ DO:

❌ DON’T:

Sample Paragraph (Well-Written)

Good Example:

Bad Example:

Common Mistakes to Avoid

After Filing: Oral Argument Prep

Related Resources

Important Disclaimers