- Partial summary judgment applies the same basic test as full summary judgment — is there a genuine issue requiring a trial — but to a slice of the case rather than the whole thing.
- - The issue is genuinely severable — deciding it doesn't require the same facts, witnesses, or credibility findings as what's left for trial - Resolving it early would meaningfully…
- - The issue overlaps too closely with facts or credibility questions still headed to trial - Deciding it now risks the same evidence being presented twice — once on the motion, once at…
Not every lawsuit is all-or-nothing. Some cases involve multiple claims, multiple defendants, or several distinct issues bundled into one action — and sometimes only one piece of that puzzle is clear-cut enough to decide without a full trial.
That's where partial summary judgment comes in: instead of asking the court to decide the entire case early, a party asks it to resolve just one claim, one defendant's liability, or one discrete issue, while everything else continues toward trial. Ontario courts will grant it — but only in the right circumstances.
What Partial Summary Judgment Actually Means
Partial summary judgment applies the same basic test as full summary judgment — is there a genuine issue requiring a trial — but to a slice of the case rather than the whole thing. It's useful when a lawsuit has several moving parts and only some of them are ready to be decided on the paper record.
When Courts Are Willing to Grant It
- The issue is genuinely severable — deciding it doesn't require the same facts, witnesses, or credibility findings as what's left for trial
- Resolving it early would meaningfully narrow the case, reduce cost, or remove an entire claim or party
- There's little risk that a later trial could reach a finding that conflicts with the earlier partial judgment
When Courts Will Refuse
- The issue overlaps too closely with facts or credibility questions still headed to trial
- Deciding it now risks the same evidence being presented twice — once on the motion, once at trial
- The efficiency gained doesn't clearly outweigh the added cost and delay of running a separate motion on top of the eventual trial
Ontario courts have generally been cautious about slicing cases up this way unless the benefit is clear, because a motion that doesn't genuinely simplify the case can end up adding an extra procedural step rather than removing one.
Partial Summary Judgment vs. Other Ways to Narrow a Case
| Tool | What it targets | Effect on the rest of the case |
|---|---|---|
| Full summary judgment | The entire claim or defence | Ends the action, subject to appeal, if granted |
| Partial summary judgment | One claim, defendant, or discrete issue | Resolves that piece; the rest proceeds to trial |
| Simplified Procedure | The whole case, if the amount claimed qualifies | Streamlines the entire process, not just one issue |
Before Bringing a Partial Summary Judgment Motion, Ask Yourself
- [ ] Is the issue truly separate from the facts still going to trial, or does it overlap?
- [ ] Would winning meaningfully end part of the dispute, or just delay the same fight?
- [ ] What would the motion cost compared with simply proceeding to trial on everything?
- [ ] Could a partial win still leave you arguing the same underlying facts anyway?
Frequently asked questions
Can a defendant use this to knock out just one claim in a multi-claim lawsuit?
Yes — a defendant facing several claims in one action can move for partial summary judgment on the claim they believe has no real chance of success, while the other claims proceed. Whether the court agrees to decide it separately depends on how cleanly that claim can be separated from the rest.
Does a partial summary judgment get appealed differently than a full trial decision?
Appeal routes can differ depending on the nature of the order and the court that made it. Because partial judgments leave part of the case ongoing, the appeal timing and process can raise its own questions — worth confirming with a lawyer before assuming the usual trial-appeal timeline applies.
Is partial summary judgment available in Small Claims Court?
Small Claims Court runs on its own simplified procedure, distinct from the ordinary Superior Court process this kind of motion typically involves. Ask a lawyer familiar with that court about what tools are actually available there for your situation.
What happens to costs if I only win part of my motion?
Costs on a partially successful motion are discretionary, and a judge can apportion them to reflect the mixed result rather than awarding one side the full amount. Don't assume a partial win produces a full costs award.
This is a litigation question
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