Starting a Small Claims Claim: The Full Process, Decision to Service

"How do I start a Small Claims Court claim?" usually gets answered as if it were one action — fill out a form, pay a fee, done. In practice, starting a claim in Ontario is a short sequence of separate decisions, each of which can go wrong in its own way if you rush it. This article walks through that full sequence in more depth than a checklist usually allows, so you understand not just what to do, but why each step matters.

The decision most people skip past

Before any paperwork, there's a decision worth slowing down for: is going to court actually the right move for this dispute, right now? Small Claims Court exists because plenty of everyday disputes — an unpaid invoice, a damage deposit, a botched repair — are too small to justify the cost and formality of a higher court, but still deserve a real forum when informal efforts fail. That doesn't mean every unresolved disagreement belongs in front of a judge. Weigh the amount genuinely at stake against the time, effort, and filing fee involved, and be honest with yourself about whether you've truly exhausted the easier paths first.

This isn't about talking yourself out of a legitimate claim. It's about sequencing your effort sensibly, so that if you do end up filing, you're doing it because it was the right next step, not the first thing you reached for.

Confirm the basics fit Small Claims Court

Two threshold questions decide whether Small Claims Court is even available to you at all. Get comfortable with both before you invest more time.

The first is the monetary limit. Small Claims Court can generally hear claims for money, property, or services worth up to $50,000, exclusive of costs and interest — a limit that increased from $35,000 effective October 1, 2025. If your loss is larger than that, you can still choose to cap your claim at the limit and give up the difference, or pursue the full amount through the Superior Court of Justice instead. See the Ontario government's overview of suing someone in Small Claims Court for the official description of what the court can hear.

The second is your limitation period — the window of time the law gives you to actually sue. Ontario's basic limitation period, under the Limitations Act, 2002, is generally two years, running from the day you knew, or reasonably should have known, about the claim.

Demand letter first, or file right away?

Most people aren't legally required to send a demand letter before filing a claim, but plenty of experienced self-represented litigants send one anyway, for a simple reason: it costs almost nothing and it sometimes works. A clear, specific, written demand — stating what's owed, why, and by when you expect payment — occasionally resolves a dispute outright, and even when it doesn't, it creates a documented record that you tried to resolve things reasonably before going to court.

That said, a demand letter isn't always the right move. If you're close to your limitation period, if the other side has already made clear they won't engage, or if you're worried about tipping someone off before you can properly document your position, filing directly may make more sense.

Gathering your evidence and your number

Before drafting anything, pull together whatever documents support your version of events: contracts or agreements, invoices, receipts, photos, repair estimates, and any written communication with the other side. A claim built on documented figures is generally far more defensible than one built on a rounded estimate or a vague sense of what feels fair.

This is also when you arrive at the actual number you'll claim. Add up what you're genuinely owed or what your loss is genuinely worth, and keep that separate from any interest you may also be entitled to — interest and costs generally sit outside the $50,000 monetary limit, so they don't need to be squeezed into that figure.

Naming the plaintiff and the defendant correctly

Two names matter enormously on a Plaintiff's Claim: yours, and the defendant's. Use your full legal name, or your business's exact registered name, as the plaintiff. For the defendant, take real care to identify the correct legal person or entity — an individual, a sole proprietorship, or a corporation — since naming the wrong one can create delays or objections later, including when it comes time to enforce a judgment. This question deserves its own deep dive; see who can you sue in Ontario Small Claims Court for the full treatment of individuals, corporations, and sole proprietorships as defendants.

Preparing the actual Plaintiff's Claim

The heart of a Plaintiff's Claim is its "particulars" — the written account of what happened, when, and why you're owed what you're claiming. Write this section in plain, specific, chronological language: what was agreed, what went wrong, and how you arrived at your number. Avoid vague statements like "the defendant treated me unfairly" in favour of concrete facts a stranger reading the claim for the first time could actually follow.

The official claim forms and current instructions are available through Ontario Court Forms and through the Ontario Superior Court of Justice's own guide to starting a case. This site's own court forms page also links to the forms you'll need, without naming specific form numbers here, since the exact forms in use can be updated by the court from time to time.

Choosing the correct court location

You generally file at the Small Claims Court location that covers either where the defendant lives or carries on business, or where the events giving rise to your claim happened. If more than one location could apply — for example, an agreement made in one city for work performed in another — you can typically choose whichever is more convenient. See where to file for the fuller explanation of how this works, and the Ontario Superior Court of Justice's Small Claims Court page for current court location information.

Filing and paying the fee

Filing a Plaintiff's Claim requires a court fee. This is generally $108 for most individuals and small businesses, or $228 for a frequent claimant filing 10 or more claims at the same court office within a calendar year. See filing fees for the fuller current schedule, including fees for later stages of a case.

Once your claim is filed and issued by the court, it becomes an official document with a case number — but filing alone doesn't put the defendant on notice. That's the job of the next step.

Serving the defendant

Service is the formal act of delivering your issued claim to the defendant in a way the court's rules recognize as valid. This matters because a defendant generally can't be expected to respond to a claim they were never properly given, and a case can stall or be challenged if service wasn't done correctly. See serving the defendant for the detailed walkthrough of accepted methods and timing.

Once served, the defendant generally has a set window to respond with a Defence. If they don't respond in time, you may be able to request a default judgment; if they do respond, the case moves toward the next stages of the process.

What happens after you file

Filing and serving your claim is the beginning of the case, not the end of your involvement. From here, most contested cases move toward a settlement conference — a required early step aimed at resolving the dispute without a full trial — before potentially proceeding further. For the complete map of everything that can happen after this point, see the Small Claims Court process, step by step.

Common mistakes when starting a claim

• Filing before confirming the monetary limit or limitation period actually allow the claim to proceed.
• Naming the wrong defendant — an individual instead of their corporation, or vice versa.
• Writing vague or emotional particulars instead of a clear, factual account.
• Assuming filing is the same as serving, and delaying service afterward.
• Guessing at the correct court location instead of confirming it.
• Claiming a rounded, undocumented figure instead of a number built from real records.

What to do next

1. Confirm your limitation period and the monetary limit apply to your situation before doing anything else.
2. Gather your documentation and calculate a specific, defensible claim amount.
3. Decide whether a demand letter makes sense first, based on your timing and the other side's likely response.
4. Confirm the correct legal name for the defendant and the correct court location.
5. Prepare and file your Plaintiff's Claim, paying the applicable fee.
6. Arrange service on the defendant promptly once your claim is issued.

Frequently asked questions

This article is general legal information, not legal advice about your specific situation. See our disclaimer for more detail, and consider speaking with a lawyer or licensed paralegal if you need guidance tailored to your own circumstances.