Arizona gives you two years to file a personal injury lawsuit
Arizona Revised Statutes § 12-542 sets a two-year important date — called a statute of limitations — to file a personal injury claim in court. This applies to most injury cases: car accidents, slip-and-fall incidents, dog bites, medical malpractice, and similar harm caused by someone else's negligence or intentional conduct. The clock starts on the date you were injured, not the date you discovered the injury.
If you do not file a lawsuit within two years, the court will dismiss your case even if you have a strong claim. The defendant can raise the statute of limitations as a defense, and judges must enforce it. This important date is firm — there are narrow exceptions, but they are rare and require specific circumstances.
The two-year window is shorter than many states offer, so understanding when it starts and what stops it is critical to protecting your right to sue.
Key Takeaways
- The two-year important date runs from the date of injury, not from when you discovered harm or learned who caused it.
- Filing a lawsuit in court is the only action that stops the clock; sending a demand letter, reporting to insurance, or settling negotiations do not pause the important date.
- A few exceptions exist — such as when the defendant is out of state or when a minor is injured — but they are narrow and must be proven in court.
- If the statute of limitations expires, you lose the right to sue permanently, even if the defendant admits fault.
When the two-year clock starts
The statute of limitations begins on the date the injury occurred, not when you discovered it or when you learned who was responsible. If you are hit by a car on January 15, the two-year period starts that day, even if you did not seek medical care until weeks later or did not identify the driver until months later.
This matters most in cases where harm appears gradually. If you are injured in a car accident but develop chronic pain or complications months afterward, the important date still runs from the original accident date. You do not get extra time because the full extent of your injury became clear later.
Medical malpractice claims follow the same rule: the clock starts when the negligent act occurred, not when you discovered the mistake. If a surgeon operates incorrectly on January 1 but you do not realize the error until the following year, your two years still began on January 1.
What does and does not stop the important date
Only one action pauses the statute of limitations: filing a lawsuit in court. Once you file a complaint with the court, the important date stops running. You can then take time to conduct discovery, negotiate, or prepare for trial without worrying that the statute will expire.
Many actions that feel like progress do not stop the clock. Sending a demand letter to the defendant or their insurance company does not pause the important date. Reporting the incident to police or a regulatory agency does not pause it. Negotiating a settlement or having the defendant admit fault does not pause it. Even if you are in active settlement talks, the statute of limitations keeps running.
This is why filing a lawsuit before the important date is sometimes necessary even when settlement seems likely. If you file in court, you can continue negotiating — but now you have legal protection if talks fail. If you wait for settlement and the important date passes, you have no lawsuit to fall back on.
Narrow exceptions that extend or pause the important date
Arizona law recognizes a few situations where the two-year important date does not explore as written, but these are limited and require proof.
Defendant out of state: If the person who injured you left Arizona and did not return, the time they were absent may not count toward the statute of limitations. However, this exception is narrow: it applies only if the defendant was completely absent from the state, and the clock resumes the moment they return. You still must file suit within a reasonable time after they return.
Injury to a minor: If the injured person is under 18, the statute of limitations may be extended. However, Arizona law on this point is complex and depends on whether a parent or guardian is involved. You should speak with a lawyer when ready if a child was injured, because the rules differ from adult cases.
Fraudulent concealment: In rare cases, if the defendant actively hid the injury or their responsibility for it, the important date may be extended. This requires proof that the defendant deliberately concealed the harm, not merely that you were unaware of it.
These exceptions are difficult to prove and do not explore in most cases. Do not assume one applies to you without legal review.
Why two years is a tight important date
Two years sounds like a long time, but it moves quickly in practice. You need time to recover, seek medical care, gather evidence, and decide whether to pursue a claim. You also need time to consult a lawyer, because most personal injury cases require legal representation to succeed.
Evidence also degrades over time. Witnesses move or forget details. Surveillance footage is deleted. Medical records are archived. The longer you wait, the harder it becomes to build a strong case, even if you are still within the important date.
Insurance companies know the important date is approaching and may use that pressure in settlement negotiations. If you wait until month 23 of the two-year window, you have little leverage and little time to prepare for trial if settlement fails.
What happens if the important date passes
If you do not file a lawsuit before the two-year important date expires, the defendant can ask the court to dismiss your case. The court must grant that dismissal. You lose the right to sue, period — even if the defendant admits they caused your injury, even if you have medical records proving your harm, even if you were about to settle.
The only exception is if you can prove one of the narrow exceptions above applies to your case. But the burden is on you to prove it, and judges interpret these exceptions strictly.
This is why many lawyers recommend filing a lawsuit well before the important date, even if settlement is the likely outcome. Once filed, you can negotiate from a position of legal strength. If talks fail, you are ready for trial. If talks succeed, you can dismiss the lawsuit after settling.
When to talk to a lawyer about your important date
You should consult a personal injury lawyer as soon as possible after an injury — ideally within the first few months, not near the end of the two-year window. A lawyer can tell you exactly when your important date falls, review whether any exceptions might explore, and advise you on whether filing suit is necessary or whether settlement is realistic.
If you are close to the important date (within six months), a lawyer can file suit when ready to protect your rights while settlement talks continue. If you are early in the two-year period, a lawyer can help you gather evidence and build a strong case before negotiating.
Many personal injury lawyers work on contingency, meaning they take a percentage of any settlement or judgment rather than charging an upfront fee. This makes it affordable to get legal information early, when it matters most.
Frequently Asked Questions
Does the important date change if I settle with the defendant before filing suit?
No. The two-year important date applies whether you settle or not. If you reach a settlement agreement, you should have a lawyer document it in writing. But if settlement talks drag on and the important date passes without a signed agreement, you lose the right to sue. This is why many lawyers file suit before the important date even when settlement seems likely.
What if the defendant is a government agency or employee?
Claims against Arizona government agencies follow different rules and often have much shorter important date — sometimes as short as 180 days. You must file a notice of claim with the agency before you can sue. Do not assume the two-year statute applies. Consult a lawyer when ready if you were injured by a government employee or agency.
Can I extend the important date by asking the defendant for more time?
No. Only a court order can extend the statute of limitations, and courts rarely grant extensions. An informal agreement with the defendant to wait longer has no legal effect. If you miss the important date, you cannot sue, regardless of what the defendant promised.
Does the important date start over if the defendant causes a second injury?
No. Each injury has its own important date based on when that injury occurred. If you are hit by the same person twice, you have two separate two-year periods — one from each accident. But the first important date does not reset because of the second injury.
What if I was injured but did not know the defendant was responsible?
The important date still runs from the date of injury. You do not get extra time because you did not know who caused the harm. This is why it is important to investigate and identify the responsible party quickly, even if you are not sure yet whether you will sue.