If you’ve been injured in Ontario, strict limitation periods determine how long you have to file a personal injury claim. Learn the key deadlines — and why waiting too long can cost you your right to compensation.
One of the most important — and often overlooked — parts of a personal injury case is time.
In Ontario, there are strict legal deadlines for starting a lawsuit or notifying the appropriate parties about your injury. Missing these deadlines can permanently eliminate your right to recover compensation, no matter how strong your case is.
At Mirian Law Firm, many injured clients contact us only days or weeks before their limitation period expires — putting their case at serious risk. This blog explains the timelines you need to know to protect your rights.
The General Limitation Period: 2 Years
Under Ontario’s Limitations Act, 2002, most personal injury claims must be filed within two years from the date of the accident or from the date you first knew you were injured.
This applies to injuries from:
- Car accidents
- Slip and falls
- Dog bites
- Assaults
- Product defects
- Medical errors (with exceptions)
If you miss the two-year limitation period, you lose the right to file a lawsuit — even if the other party was clearly negligent.
The Discoverability Rule: When the Clock Starts
Not all injuries are obvious immediately. For example:
- A concussion may worsen days later
- Chronic pain may develop over time
- Psychological trauma may appear weeks after the accident
Ontario law uses the discoverability rule, which means the limitation period begins when:
- You knew you were injured
- You knew the injury was caused by someone else
- You knew a legal proceeding would be appropriate
A lawyer can help determine the exact start date in complex cases.
Shorter Deadlines You Must Not Miss
Some cases have much shorter notice periods — some as low as 7–10 days.
1. Claims Against Municipalities (Sidewalks, Roads, Snow/Ice) — 10 Days
If you slip on an icy city sidewalk or trip on a road defect, you must provide written notice to the municipality within 10 days of the accident.
Missing this deadline may bar your claim completely unless you can prove a valid excuse and no prejudice to the municipality.
2. Car Accidents — Insurance Deadlines
Ontario’s no-fault accident benefits system has its own timelines:
- 7 days → Report the accident to your insurer
- 30 days → Submit your accident benefits application
- 2 years → Start a lawsuit against the at-fault driver (tort claim)
Need an Ontario Personal Injury Lawyer? Start your personal injury claim today!
3. Medical Malpractice Cases
These still follow the 2-year general rule, but discoverability is often debated because symptoms may appear much later. Expert review is usually required to determine timing.
4. Claims Involving Minors
If the injured person is under 18, the 2-year limitation clock does not start until they turn 18 — unless they have a litigation guardian.
5. Claims Involving Incapacity
If a person is mentally incapable of starting a lawsuit, the limitation period may be paused (tolled) until capacity is restored.
Why Limitation Periods Matter So Much
Filing early protects your case because:
- Evidence is easier to collect
- Witness memories are more accurate
- Surveillance footage is more likely to exist
- Insurance companies take your claim more seriously
- There’s more time to obtain medical reports and expert opinions
Waiting too long can severely weaken — or destroy — your claim.
What Happens If You Miss the Deadline?
In most situations:
❌ The court will dismiss your case
❌ You cannot sue the at-fault party
❌ You lose the right to compensation permanently
Very limited exceptions exist, but courts rarely grant them.
This is why contacting a personal injury lawyer as soon as possible after an accident is crucial.
How Mirian Law Firm Protects Your Rights
At Mirian Law Firm, we carefully track all limitation periods and ensure your claim is filed on time. When you retain us:
- We immediately notify all parties
- We preserve evidence
- We ensure your insurance forms are submitted before deadlines
- We file your lawsuit within the statutory period
- We act quickly if short deadlines (e.g., municipal claims) apply
You focus on recovery — we take care of everything else.
When to Contact a Lawyer
You should contact a personal injury lawyer immediately if:
- You were injured in any accident
- You’re unsure when your limitation period expires
- The insurance company is delaying or denying your claim
- You have ongoing symptoms weeks or months after the incident
Delays can cost you your entire case — and insurers know this.
Contact Mirian Law Firm Today
If you or a loved one has been injured, don’t wait.
Our team at Mirian Law Firm will review your case, explain your limitation period, and protect your right to compensation.
📞 Call us: 647-588-5666
📧 Email: info@mirianlaw.com
🌐 Visit: mirianlaw.com
📍 Serving clients across Ontario: Toronto, Vaughan, Richmond Hill, Markham, Thornhill, and the GTA.
Free consultation. No fees unless we win.