How Long Do You Have to Sue After a Car Accident in Ontario?

If you were hurt in a car accident in Ontario, one question tends to come up fast. How long do you have to sue? The short answer most people are looking for is two years. But the full answer has more moving parts, and getting it wrong can quietly cost you everything.

Here is the honest version. There is more than one deadline after a crash. Some of them are much shorter than two years. A few of them are only a handful of days. Miss the wrong one, and the door to compensation can close for good, no matter how badly you were hurt and no matter how clearly the other driver was to blame.

This guide walks through every important time limit that can apply after an Ontario car accident. It explains the basic two year deadline to start a lawsuit, when the clock actually starts running, and the special rules for children and for people who cannot manage their own affairs. It covers the separate 120 day notice you have to give before suing over a car crash, the very short deadlines for accident benefits from your own insurer, and the tight notice periods that apply when a city road or a property owner is part of the story.

We wrote this in plain language for someone who has no legal training and is simply trying to protect their family. Please read it as general information, not as legal advice for your specific situation. Deadlines in injury law are unforgiving, and the safest move is always to get advice early, long before any clock runs out. If you are close to a deadline right now, do not wait. Speak with a car accident lawyer today.

What is the deadline to sue after a car accident in Ontario?

The main deadline to sue for a personal injury in Ontario comes from a law called the Limitations Act, 2002. Section 4 of that Act sets what lawyers call the basic limitation period. In plain words, it gives you two years to start a lawsuit.

The exact wording says that a proceeding "shall not be commenced in respect of a claim after the second anniversary of the day on which the claim was discovered." Strip away the legal language and it means this. You generally have two years, and the two years is counted from the day you discovered your claim, not always from the day of the crash. For most car accidents those two dates are the same, so for most people the deadline is two years from the date of the collision. We explain the difference in the next section, because it matters.

"Start a lawsuit" has a specific meaning here. It means issuing a document called a statement of claim at the court and having it stamped by the court office. It does not mean settling your case, finishing your treatment, or even serving the papers on the other driver. It means the claim is formally filed at court before the deadline. As long as your claim is issued in time, the case can then continue for months or years after that. What you cannot do is file it late.

So if your crash happened on, say, March 10, 2026, and you knew right away that you were hurt and who hit you, your basic deadline to issue a lawsuit is March 10, 2028. That is the date to protect. In practice a careful lawyer treats the anniversary of the accident as the working deadline and aims to have everything filed well before it, never on the last day.

One more point that surprises people. Two years sounds like a long time, and it feels even longer when you are in pain and just trying to recover. But two years passes quickly once you factor in medical treatment, gathering records, investigating fault, identifying every party who should be sued, and trying to settle before going to court. Lawyers do not treat two years as a comfortable cushion. They treat it as a firm wall that arrives sooner than clients expect.

When does the two year clock actually start?

This is the part most people get wrong, so it is worth slowing down. The two years does not always start on the day of the crash. It starts on the day your claim was "discovered." Discovery is defined in section 5 of the Limitations Act, and it has a specific meaning.

Under section 5, a claim is discovered on the day you first knew all of the following four things, or the day a reasonable person in your shoes should have known them. In everyday language, the four things are:

First, that you suffered some injury, loss, or damage. Second, that the injury was caused, at least in part, by someone's action or failure to act. Third, that this action or failure was done by the person you would be suing. And fourth, that a lawsuit is an appropriate way to deal with the harm.

When you knew, or reasonably should have known, all four of those things, the clock starts. The idea behind the rule is fairness. The law does not want to punish you for missing a deadline on a claim you did not yet know you had.

There is a catch that pulls in the other direction, and you need to know about it. Section 5 also contains a presumption. It says you are presumed to have known about your claim on the very day the accident happened, unless you can prove otherwise. In a typical car crash, this presumption is easy to understand and hard to fight. You usually know the moment it happens that you were hit, that another driver caused it, and that you were hurt. So for a typical car accident, the clock starts on the day of the collision, and the deadline is two years from that day.

The presumption is your default, not your ceiling. If your situation genuinely fits the delayed discovery rule, the start date can move later. But you should never assume that it will. Treat the accident date as your start date unless a lawyer has looked at your file and confirmed that a later date applies. Building your whole plan around a hoped for later start date is one of the riskiest things an injured person can do.

Why isn't the deadline always exactly two years from the crash?

Because injuries and information do not always arrive on the day of the crash. The discovery rule exists for real situations where one of those four pieces of knowledge came later. Here are the common ways that happens, described as illustrations rather than promises about any specific case.

Sometimes the injury shows up late. A person walks away from a low speed collision feeling shaken but basically fine. Weeks later, a serious problem emerges, such as a disc injury in the spine or symptoms of a concussion that were masked at first by the shock of the crash. If a reasonable person truly would not have connected the harm to the accident until later, the discovery date can be later. Concussions and other brain injuries are a classic example, because their effects can be subtle at first and grow clearer over time.

Sometimes you do not know who caused the harm right away. Imagine a multi vehicle pile up where it is unclear for some time which driver actually started the chain reaction. Or picture a case where you later learn that a mechanical defect or a poorly maintained road played a role. If the identity of the responsible party was genuinely unknown and could not reasonably have been known, that can affect when the clock started for a claim against that particular party.

Sometimes the "appropriate means" piece is what shifts the date. The law recognizes that in some cases a lawsuit only becomes an appropriate step once other avenues have played out. These arguments are technical, they are decided case by case, and courts do not accept them lightly. They are not a reason to relax.

Here is the practical takeaway. The delayed discovery rule is a real safety valve, but it is narrow, it is fact specific, and the burden is on you to prove it applies. It is something a lawyer might use to save a claim that would otherwise look late. It is not something you should ever rely on to justify waiting. If there is any chance your injury is connected to the crash, the safe assumption is that your clock started on the crash date.

What is the 120 day notice rule for car accident lawsuits?

Here is a deadline that many injured people have never heard of, and it arrives long before the two year mark. For a lawsuit that arises out of a motor vehicle accident, Ontario law requires you to give written notice of your intention to sue within 120 days of the accident. This rule comes from the Insurance Act, which governs auto claims in Ontario.

Think of it as an early warning letter. The idea is that the person or company you plan to sue, and their insurer, should learn reasonably soon that a claim is coming, so they can investigate while the trail is fresh. The notice is written, it identifies that you intend to bring a claim, and it has to go out within 120 days of the crash, which is roughly four months.

This is a separate deadline from the two year limitation period, and it is much earlier. The 120 day notice is not the lawsuit itself. It is a heads up that a lawsuit is coming. You still have to issue the actual lawsuit within the two year window. So a car accident claim really has two deadlines to respect. First, the early notice of intention within about four months. Second, the issued lawsuit within two years.

There is some flexibility built into the rule. The law generally allows a claim to survive a missed or imperfect notice if there is a reasonable excuse for the delay and the other side is not prejudiced by it. That is a genuine safety valve, and courts have applied it. But like the delayed discovery rule, it is a lifeline you never want to need. Relying on a judge later agreeing that your excuse was reasonable is a gamble with your own compensation. The clean approach is simple. Get advice quickly after a crash so that proper notice goes out well within the 120 days, and the question of excuses never arises.

The bigger lesson is this. Because notice can be due in as little as four months, the myth that "I have two years, so there is no rush" is dangerous. There is a rush. The earliest important deadline can land months before most people even think about calling a lawyer.

How is suing the driver different from claiming accident benefits?

To understand the deadlines, it helps to remember that an Ontario car accident usually opens two separate paths, and each path has its own clocks.

The first path is accident benefits. These are payments and services you claim from your own auto insurance company after a crash, no matter who caused it. They are sometimes called no fault benefits, which only means you go to your own insurer regardless of blame. Accident benefits are designed to help you soon after the crash, with things like treatment, and, if you carry the coverage, some replacement of lost income. You can read more about how those benefits changed recently in our guide on the 2026 accident benefits changes in Ontario.

The second path is the lawsuit, also called the tort claim. This is a claim against the driver or other party who was at fault for causing the crash. A lawsuit can seek things that accident benefits do not fully cover, such as compensation for pain and suffering, the full value of income you lost and will lose over time, and the cost of future care. For a seriously injured person, the lawsuit is often where the larger part of the recovery comes from. To see how those figures are built, read our guide on how much a car accident claim is worth.

Most seriously hurt people pursue both paths at the same time. The important thing for deadlines is that the two paths do not share a single clock. The accident benefit deadlines are short and come from your insurance policy and its rules. The lawsuit deadlines come from the Limitations Act and the Insurance Act. You can be perfectly on time with one and hopelessly late with the other. That is why it helps to map every deadline out from day one.

What are the deadlines for accident benefits after a crash?

The accident benefit deadlines are the shortest of all, and they start ticking almost immediately. If you were hurt in a crash and want benefits from your own insurer, you generally have to move within days, not months.

The first step is telling your insurer. You are generally expected to notify your auto insurance company of your intention to apply for accident benefits within seven days of the accident, or as soon as practicable after that. A phone call to report the crash and say you intend to claim benefits is the usual first move. Do not sit on this. Reporting the crash promptly to your own insurer is a basic protective step, and it is separate from any question of fault. If you are unsure whether you even have to report a crash, our guide on whether you have to report a car accident in Ontario walks through it.

After you notify your insurer, they send you an application package. Once you receive it, you generally have 30 days to complete and return the main application form, known as the OCF 1. This form is the formal start of your accident benefit claim. Missing the 30 days does not always end the claim on its own, but delay can cause real problems and can be used against you, so the goal is always to file it on time and completely.

There are other forms in the package too, including forms your employer and your treatment providers fill out, each with their own timing expectations. The system moves quickly and it can feel overwhelming right after a crash, when you are in pain and dealing with a wrecked car and time off work. This is exactly the moment when many people benefit from having a lawyer or a trusted person help them stay on top of the paperwork so nothing is missed.

The short version to remember is this. Accident benefit clocks start almost at once. Notify within about seven days. Return the application within about 30 days of getting the package. When in doubt, act sooner rather than later.

How long do I have to dispute a denied accident benefit?

Filing for accident benefits on time is one thing. Getting the insurer to actually pay is another. Insurers deny and cut off benefits often, and when they do, there is a separate deadline to challenge them.

Disputes about accident benefits in Ontario are decided by a body called the Licence Appeal Tribunal, usually shortened to the LAT. If your insurer denies a benefit or stops paying one, you generally have two years from the date of that refusal to bring your dispute to the LAT. That two years runs from the insurer's denial, not from the accident, which is a distinction people miss.

Every denial can start its own two year clock. If the insurer refuses to fund a treatment plan in one letter and cuts off your income replacement benefit in another, you may be looking at more than one deadline to track. Because these letters can arrive months or years apart, and because they are sometimes written in confusing language, it is easy to overlook that a clock has started. A denial letter is not junk mail. It is a legal trigger.

If your benefits have been denied or cut off, do not just accept it and do not let the two years slip by. You have the right to challenge the decision. Our guide on what to do when accident benefits are denied and how the LAT works explains the dispute process step by step. The key point for this article is simply that the deadline to fight a denial is separate from the deadline to sue the at fault driver, and it is triggered by the insurer's letter.

What if a government road authority or a property owner is involved?

Some car accident claims are not only about the other driver. Sometimes a poorly maintained road, a missing sign, snow that was not cleared in time, or a dangerous property condition contributed to the crash or to an injury connected with it. When a public authority or a property owner is a potential defendant, extra notice rules apply, and they are strict and short.

If your claim involves a municipality, for example a pothole, a road in poor repair, or a hazard the city was responsible for, you generally have to give the municipality written notice of your claim within 10 days. That is not a typo. Ten days. This short notice rule for claims against a municipality is one of the tightest deadlines in Ontario injury law, and missing it can seriously damage a claim against the city. A court does have some limited power to excuse a late or imperfect notice in defined circumstances, but that is never something to count on.

If your injury was caused by snow or ice, for instance a slip and fall in a parking lot or on a walkway connected with getting to or from a vehicle, a different short deadline applies. Under the Occupiers' Liability Act, you generally have to give written notice within 60 days to the occupier of the property or to the contractor who was responsible for clearing the snow and ice. The notice has to include the date, time, and location of what happened. As with the municipal rule, there is a narrow safety valve for a reasonable excuse where the other side is not prejudiced, but it is not something to count on. We cover this in detail in our guide on slip and fall on ice claims and the 60 day notice rule.

These short notice periods are exactly why early legal advice matters so much. A person focused on healing has no reason to know that a claim against a city can require notice within 10 days, or that a snow and ice injury carries a 60 day notice. A lawyer spots these possible defendants early and gets the required notices out in time, before any door quietly closes. The moment more than just another driver might be responsible, the calendar gets much tighter.

What is the deadline to sue if the injured person is a child?

Ontario law treats children differently, and for good reason. A child cannot start a lawsuit on their own, so it would be unfair to run a deadline against them while they are too young to act. The Limitations Act builds in protection for minors.

Section 6 of the Act says the basic two year limitation period does not run during any time that the injured person is a minor and is not represented by a litigation guardian. A litigation guardian is an adult, usually a parent, who is appointed to bring a lawsuit on the child's behalf. In plain terms, the two year clock generally does not even begin for a child until they turn 18, unless a litigation guardian steps in and starts the claim sooner.

So what does that mean in practice? For most childhood injury cases, the child effectively has until their 20th birthday to start a lawsuit, because the two years begins on their 18th birthday. A child hurt in a crash at age 10 does not lose the right to sue at age 12. The clock is paused while they are a minor.

There are important wrinkles. A parent or guardian can, and often should, bring the claim on the child's behalf long before the child turns 18, especially in serious cases where waiting would let evidence disappear. Also, in some situations a defendant can take a step to have a litigation guardian appointed, which can start the clock running earlier. And a parent's own separate claim connected to their child's injury, such as a claim under the Family Law Act for their loss, follows the ordinary two year rule. It is not paused by the child's age. So a family should never simply assume there is unlimited time because a child was involved. The child's own core claim is protected, but related claims may not be, and acting early is still far safer.

If a child in your family was hurt in a crash, the protective pause is real, but it is not a reason to wait years. Evidence still fades, and getting advice early lets a lawyer preserve what matters and decide the best time to start the claim.

What if the injured person cannot manage their own affairs?

There is a second group the law protects in a similar way. If the injured person is incapable of starting a lawsuit because of their physical, mental, or psychological condition, the two year clock is paused for as long as that incapacity lasts and they have no litigation guardian to act for them.

This comes from section 7 of the Limitations Act. It matters most in the very serious cases, such as a severe traumatic brain injury or a period of coma or profound cognitive impairment after a catastrophic crash, where the injured person genuinely cannot understand or manage a legal claim. In those situations, the law does not run the deadline against a person who has no ability to protect themselves.

Two cautions come with this. First, the law presumes that a person is capable unless the contrary is proved. So incapacity is not assumed just because someone is badly hurt or on medication. It has to be established, and the burden is on the person relying on it. Second, once the incapacity ends, the clock resumes, and the Act contains a rule that gives a short extension if very little time was left when capacity returned. These are technical points that a lawyer assesses carefully.

The bottom line is the same as with minors. The pause is a genuine protection for the most vulnerable injured people, but it is fact specific and it should never be treated as a casual reason to delay. If a loved one was so seriously hurt that they cannot handle their own affairs, the family should get legal advice quickly, both to protect the claim and to sort out who can act on the injured person's behalf.

Is there a final deadline no matter what?

Yes. Even the delayed discovery rule and the pauses for minors and incapacity have an outer boundary. The Limitations Act contains what is called an ultimate limitation period, and for most claims it is 15 years.

Section 15 says that no proceeding can be started more than 15 years after the day the act or omission on which the claim is based took place, even if the claim has not yet been discovered. This is a backstop. It exists so that potential defendants are not exposed to lawsuits forever over events in the distant past. For a car accident, the 15 years generally runs from the date of the crash.

For an ordinary car accident, the 15 year backstop almost never becomes the operative deadline, because the two year rule bites long before then. Where the 15 year period can matter is in unusual cases, for example an injury whose connection to an event only becomes clear many years later, or certain claims involving children. Even the ultimate period has some narrow exceptions, such as where a defendant wilfully concealed the facts, and it too is paused during a claimant's minority or incapacity. But those are edge cases.

For nearly everyone reading this, the practical deadline is the two year rule, not the 15 year one. The 15 year period is worth knowing exists, so you understand that the law does eventually close every window, but it should never be your target. Your target is the two year date.

What actually happens if I miss the deadline?

It helps to be blunt about the consequence, because it is severe. If you miss the limitation period and start your lawsuit late, the other side can bring a motion to have your claim dismissed, and in most cases the court will dismiss it. The merits of your case stop mattering. It does not matter that the other driver was clearly at fault. It does not matter that your injuries are life changing. A claim that is out of time is usually a claim that is over.

The Limitations Act reinforces this in another way. Section 21 says that if a limitation period against a person has expired, you cannot bring that person into an existing lawsuit by adding them as a party later. So if you sue the wrong party, or you only discover an additional responsible party after the deadline, you can be barred from adding the right one. This is one of the technical reasons that identifying every proper defendant early is so important. It is not always obvious who should be sued. There can be multiple drivers, a vehicle owner who is different from the driver, an employer whose worker caused the crash, a municipality, or others. Each has to be identified and, where required, given notice and sued within the applicable time.

There is no general "I did not know about the deadline" exception. Not knowing the law does not extend the limitation period. The narrow rescue arguments, such as delayed discovery, the reasonable excuse for a late notice, or a pause for minority or incapacity, are exactly that, narrow, and they have to be proven. They are the reason some late looking claims can still be saved, but they are the exception, not the plan.

That is the real reason lawyers hammer on deadlines. Miss the wrong one and the strongest injury case in the world can be worth nothing. Meeting the deadline is not a technicality. It is the thing that keeps your claim alive.

Can the deadline ever be paused or extended?

Sometimes, in defined ways. We have already covered the main ones, but it helps to gather them in a single place so you see the full picture. None of these should be treated as a reason to relax. They are safety valves, not a schedule.

The clock can start later than the crash under the delayed discovery rule, when you genuinely did not know, and could not reasonably have known, that you were hurt, that someone caused it, who they were, and that a lawsuit was appropriate. This is the section 5 point explained above.

The clock is paused while an injured person is a minor and has no litigation guardian, under section 6, and while an injured person is incapable of starting a claim and has no litigation guardian, under section 7.

The clock can also be paused by agreement in a specific situation. Under section 11 of the Limitations Act, if both sides agree to have an independent third party help them resolve the claim, the limitation period does not run during that agreed process. A formal mediation, where a neutral person helps both sides try to reach a settlement, is a common example. This is a real tool that lawyers sometimes use, but it depends on a genuine agreement to that kind of process, and it is not something an injured person should try to engineer on their own.

Parties can also, in some circumstances, agree in writing to extend or suspend a limitation period, and an acknowledgment of liability in certain kinds of claims can reset timing. These are lawyer to lawyer tools, and they come with conditions. The everyday reader does not need to master them. What you need to take away is simple. Yes, deadlines can sometimes be paused or extended, but only in defined ways, usually with legal help, and never by simply hoping. The reliable plan is always to act well before any deadline, so you never have to argue about whether one of these exceptions saves you.

Why should I act long before the deadline?

Even if your two years is nowhere near up, waiting hurts your case. There are strong reasons to get started early that have nothing to do with the raw calendar.

Evidence disappears. Skid marks fade, damaged vehicles get repaired or scrapped, and the scene changes. Video from nearby cameras, whether a doorbell camera, a business security camera, or a dash camera, is often recorded over within days or weeks. Once that footage is gone, it is usually gone for good. Getting on it early can preserve proof of exactly how the crash happened.

Memories fade. Witnesses forget details, move away, or become impossible to find. A witness who saw the other driver run a red light is powerful early, when the memory is sharp and the person is easy to locate. The same witness two years later may remember little and may have vanished. Your own memory fades too, which is why writing things down soon after the crash is so valuable.

Deadlines you did not know about may already be running. As this guide shows, the notice periods for a car accident lawsuit, for accident benefits, and for claims involving a city or a property owner can all be far shorter than two years. Some are measured in days. If you wait, one of these earlier clocks may run out before you have even thought about the two year mark.

Your recovery and your claim are connected. Getting proper medical care early, following through with treatment, and documenting your symptoms all build the record that supports both your accident benefits and your lawsuit. Gaps and delays in treatment can be used against you. Acting early on the legal side usually goes hand in hand with acting well on the medical side.

Finally, early action reduces stress. Knowing that a lawyer is protecting your deadlines, dealing with the insurer, and preserving evidence lets you focus on healing instead of worrying about paperwork and clocks. For most people that peace of mind is worth a great deal.

What steps should I take to protect my deadlines after a car accident?

Here is a practical checklist. None of it is complicated, and doing it early can protect your claim and your family for years.

Report the crash to your own insurer quickly, ideally within about seven days, and say you intend to apply for accident benefits. Ask them to send you the application package and note the date you receive it, so you can track the 30 day window to return the main application.

Get medical attention and follow through with it. Tell your doctor about every symptom, even the ones that seem minor, and keep going to your appointments. Your treatment records are the backbone of both your benefit claim and your lawsuit.

Write down what happened while it is fresh. Note the date, time, location, weather, road conditions, what each vehicle did, and anything the other driver said. Get the names and contact details of any witnesses. Take photos of the vehicles, the scene, and your visible injuries if you can.

Keep every document and receipt connected to the crash. That includes the police report or exchange of information, repair estimates, prescriptions, parking costs for medical appointments, and any proof of income you are losing. A simple folder or a phone album works.

Do not give a recorded statement to the other driver's insurer, and do not accept a quick settlement offer, before you understand what your claim is really worth. Early offers are often far below the true value of a serious injury.

Talk to a personal injury lawyer as soon as you reasonably can. A lawyer will identify every deadline that applies to your case, send the required notices on time, find every party who should be sued, deal with the insurers, and make sure the two year lawsuit deadline is met with room to spare. Most personal injury lawyers, including our team, work on a contingency fee, so you do not pay legal fees unless you recover compensation.

Doing these things does not just protect your deadlines. It builds a stronger claim, because the proof is gathered while it still exists.

How do these deadlines fit with how long a claim actually takes?

People sometimes confuse two very different questions. One is how long you have to start a claim, which is what this article is about. The other is how long the claim takes to finish once it is started. They are not the same, and mixing them up causes real anxiety.

Starting a claim in time can mean simply issuing the lawsuit at court before the two year deadline. That single step protects your rights. It does not require your treatment to be finished, your injuries to be fully understood, or your damages to be finalized. In fact, in serious cases lawyers often issue the claim to protect the limitation period while the medical picture is still developing, and then the case proceeds from there.

How long the case then takes to resolve is a separate story that depends on the severity of the injuries, how disputed fault is, how the insurer behaves, and whether the case settles or goes to trial. Some cases resolve in a year or two. Serious cases can take several years, in part because it is often wise to wait until the injuries have stabilized before valuing the claim, so that the future is properly accounted for. Our guide on how long a personal injury claim takes in Ontario walks through the stages and the typical timelines.

The key message is reassuring. You do not have to have everything figured out by the two year mark. You only have to have your claim properly started by then. Meeting the deadline is a discrete step. Resolving the case is a longer journey that begins once the deadline is safely met.

A closer look at the discovery rule, with an illustrative scenario

Because the discovery rule confuses so many people, it helps to walk through a concrete example. The scenario below is an illustration only. It is not a real client and not a real case.

Imagine a driver we will call Maria. She is rear ended at a red light on a winter evening. At the scene she feels rattled and her neck is a little sore, but she declines an ambulance and drives home, assuming she is basically fine. Over the next several weeks the neck pain does not go away, and new symptoms appear, including headaches and trouble concentrating at work. About two months after the crash, a specialist diagnoses a concussion and a soft tissue injury to her neck that are consistent with the collision.

When did Maria's two year clock start? In most cases like this, the answer is the date of the crash, because she knew right away that she was hit, that another driver caused it, and that she had at least some injury, a sore neck. The presumption in the law would place the discovery date on the accident day. The later diagnosis confirmed and named her injuries, but she already knew enough on the day of the crash to start the clock. So Maria should treat two years from the collision as her deadline.

Now change one fact. Suppose Maria truly had no symptoms at all at the scene or in the days after, felt completely normal, and only much later developed a serious problem that a doctor connected back to the crash. In that different situation, an argument could exist that the claim was discovered later, when a reasonable person would first have connected the harm to the accident. Whether that argument succeeds depends heavily on the facts, on what a reasonable person would have known, and on the medical evidence, and the burden would be on Maria to prove it.

The lesson from both versions is the same. The safe assumption is that the clock started on the day of the crash. The delayed discovery rule is a narrow argument a lawyer might use to rescue a claim, not a comfortable extension you can count on. When in doubt, protect the earlier date.

How do all the deadlines compare, side by side?

It can help to see the main deadlines together. The table below summarizes the most common time limits after an Ontario car accident. Treat it as a general guide, not a substitute for advice on your specific case, because the exact rule and any exception depend on your facts.

Read the table with one idea in mind. The two year lawsuit deadline gets the most attention, but several important deadlines land far earlier. The notice periods measured in days are the ones people miss without ever realizing a clock was running.

What are the most common mistakes people make with these deadlines?

Lawyers who handle car accident claims see the same avoidable errors again and again. Knowing them can help you steer clear.

Assuming two years means there is no rush. This is the single most common and most damaging myth. As this guide shows, the earliest deadlines can be measured in days. Waiting because you think you have two years can cause you to miss a notice period that was due in the first few months.

Waiting until treatment is finished before calling a lawyer. You do not need to be healed to start protecting your claim. Waiting can blow past notice deadlines and let evidence disappear. It is entirely normal to start the legal process while you are still recovering.

Ignoring a denial letter from an insurer. A letter cutting off a benefit is not just frustrating mail. It can start a two year clock to dispute the decision at the LAT. Set that letter aside as unimportant and you may lose the right to challenge it.

Forgetting about the other possible defendants. Focusing only on the other driver can cause you to miss a much shorter notice deadline for a municipality or a property owner who also shares blame. By the time that becomes clear, the 10 day or 60 day window may be long gone.

Trusting a later start date without confirming it. Hoping the delayed discovery rule gives you extra time, without a lawyer confirming it, is a gamble. If the argument fails, the claim is out of time.

Assuming a child's claim gives the whole family unlimited time. The child's own claim is protected while they are a minor, but a parent's related claim generally is not, and evidence still fades. Delay can still hurt.

Handling a serious claim alone to save on fees. Injury deadlines and notice rules are technical. Most personal injury lawyers work on contingency, so cost is rarely a reason to go without advice, and a missed deadline is far more expensive than any fee.

The thread running through all of these is the same. When it comes to deadlines, early and careful beats late and hopeful every time.

Key terms explained

Limitation period. The legal deadline to start a lawsuit. For most Ontario personal injury claims it is two years from the day the claim was discovered.

Discovery. The point at which you knew, or reasonably should have known, that you were injured, that someone's act or omission caused it, who that person was, and that a lawsuit was an appropriate response. The two year clock generally starts on this date.

Statement of claim. The court document that formally starts a lawsuit. Issuing it at the court before the deadline is what protects your right to sue.

Notice of intention to sue. An early written warning, generally due within 120 days of a car accident, that a lawsuit is coming. It is separate from, and earlier than, the lawsuit itself.

Accident benefits. Payments and services from your own auto insurer after a crash, available regardless of fault, with their own short application deadlines.

Licence Appeal Tribunal, or LAT. The tribunal that decides disputes about accident benefits. You generally have two years from an insurer's denial to bring a dispute there.

Litigation guardian. An adult, often a parent, appointed to bring a lawsuit on behalf of a child or a person who is incapable of doing it themselves.

Ultimate limitation period. The final backstop of 15 years, after which most claims cannot be started even if they were never discovered.

Contingency fee. A fee arrangement where your lawyer is paid a percentage of your recovery, so you pay no legal fees unless you win.

How VC Lawyers can help

Deadlines are where good car accident claims are quietly lost. The rules are technical, several of them arrive far sooner than people expect, and the consequence of missing one is usually final. That is a heavy thing to carry while you are trying to heal from a crash.

Our team handles car accident claims across Ontario, and protecting your deadlines is one of the first things we do. We identify every time limit that applies to your case, from the short notice periods to the two year limitation, and we make sure the required notices go out on time. We find every party who should be sued, deal with the insurers, protect the evidence while it still exists, and build your claim for full and fair compensation. We work on a contingency fee basis, which means there are no legal fees unless we recover money for you.

If you or a family member was hurt in a crash, the safest thing you can do is get advice early, before any clock runs out. Contact VC Lawyers for a free consultation, or learn more about how we help injured people on our car accident lawyer page. Even if you are not sure whether you have a claim, a short conversation can tell you what deadlines you are facing and what to do next.

Please remember that this article is general information about Ontario law and is not legal advice for your situation. Time limits turn on the specific facts of each case, and only a lawyer who reviews your file can tell you exactly which deadlines apply to you.