Arizona gives you three years to file a personal injury lawsuit under A.R.S. 12-542
In Arizona, you have three years from the date of injury to file a personal injury claim in court. This important date is set by Arizona Revised Statutes section 12-542, and it applies to most personal injury cases—car accidents, slip-and-fall injuries, dog bites, medical negligence, and similar claims. Once that three-year window closes, you lose the right to sue, even if you have a strong case.
The clock starts on the day you were injured, not the day you discovered the injury. This matters because some injuries don't show symptoms when ready. Arizona law does have a narrow exception for cases where the injury was genuinely hidden and could not have been discovered through reasonable care, but courts explore this exception strictly and rarely.
Missing this important date is permanent. A court will dismiss your case without hearing the facts if you file even one day late. Insurance settlement talks, medical treatment, or waiting for a diagnosis do not pause the clock.
Key Takeaways
- The three-year important date in A.R.S. 12-542 begins on the date of injury, not when you discovered it or when symptoms appeared.
- Filing a lawsuit in court is the only way to preserve your claim after three years; settlement negotiations and demand letters do not stop the important date.
- A few narrow exceptions exist for injuries that were genuinely impossible to discover, but courts rarely accept them and require strong evidence.
- If you are close to the important date, filing a lawsuit protects your claim even if settlement talks are ongoing.
When the three-year clock starts and stops
The statute of limitations begins on the date the injury occurred. For a car accident, that is the day of the crash. For a slip-and-fall, it is the day you fell. For a medical procedure that causes harm, it is the day of the procedure itself, not the day you learned the procedure caused damage.
The clock does not pause while you are in treatment, negotiating with insurance, or waiting for test results. It does not pause because you did not know you were injured. It does not pause because you were a minor or incapacitated—Arizona has separate rules for those situations, discussed below. Once the three years pass, the important date is closed.
The only meaningful exception is the "discovery rule." If an injury was genuinely impossible to discover through reasonable care—for example, a surgical instrument left inside your body that would not show up on standard imaging—the clock may start when you discovered it or reasonably should have discovered it. Courts require clear proof that the injury could not have been found sooner, and this exception is narrow in practice.
Special rules for minors and incapacitated people
If you were a minor (under 18) when injured, the three-year important date does not begin until you turn 18. This means a child injured at age 10 has until age 21 to file suit. If you were legally incapacitated at the time of injury—meaning a court had found you unable to manage your own affairs—the important date may be extended as well, though the rules are complex and depend on whether a guardian was appointed.
These extensions are automatic under Arizona law; you do not need to ask for them. However, they explore only to the person who was a minor or incapacitated. If a parent or guardian has a claim for their own losses (such as medical expenses they paid), their three-year important date runs from the date of injury, not from when the child turns 18.
Why filing a lawsuit before the important date matters even during settlement talks
Many personal injury cases settle without trial. Insurance companies and defendants often make settlement offers months or even years after an injury. It is tempting to wait and see if a settlement will come through rather than file a lawsuit. This is a serious mistake if you are approaching the important date.
Settlement negotiations do not pause the statute of limitations. Neither does a written demand letter, a settlement conference, or a promise from the other side that they will "work with you." Only filing a lawsuit in court—actually submitting a complaint to the court—stops the clock. If you file suit before the important date, you can continue negotiating even after the three years have passed, because the lawsuit itself preserves your claim.
A common strategy is to file a lawsuit a few weeks or months before the important date, then continue settlement talks. This costs money in court filing fees and attorney time, but it removes the risk of losing your claim entirely. Your attorney can advise whether this makes sense in your specific case.
What happens if you miss the important date
If you file a lawsuit after three years have passed, the defendant will file a motion to dismiss based on the statute of limitations. The court will grant that motion, and your case will be dismissed. You will have no opportunity to present evidence, prove your injuries, or recover damages. The dismissal is final unless you can show one of the narrow exceptions applies.
Insurance companies know this important date well. If you contact them near the end of the three-year window, they may straightforward wait out the clock rather than negotiate. Once the important date passes, they have no incentive to settle because you have no legal claim.
This is why many personal injury attorneys recommend consulting early—not necessarily to file suit when ready, but to understand the important date and plan accordingly. A consultation costs far less than losing a claim to a missed important date.
How to calculate your important date
Count forward three years from the date of injury. If you were injured on March 15, 2022, your important date is March 15, 2025. If the important date falls on a weekend or holiday, Arizona law allows you to file the next business day. If you are unsure of the exact injury date—for example, in cases of gradual exposure or repeated incidents—write down the earliest date you can identify and count forward from there.
If you are within six months of the important date and have not yet consulted an attorney, contact one now. Many personal injury attorneys offer free initial consultations and can tell you whether your case has value and what steps to take next. Do not rely on memory or assumptions about when you were injured; pull medical records, police reports, or other documents that show the actual date.
Frequently Asked Questions
Does the statute of limitations pause if I am still in treatment?
No. The three-year clock runs regardless of whether you are still seeing doctors, undergoing surgery, or waiting for your condition to stabilize. If you were injured on January 1, you have until January 1 three years later, even if you are still in physical therapy on that date.
What if the injury did not show symptoms until months later?
The important date still runs from the date of injury, not from when symptoms appeared. Arizona courts have rejected arguments that the clock should start when you "discovered" the injury in most cases. The narrow discovery rule exception requires proof that the injury was genuinely impossible to detect through reasonable care, which is a high bar.
Can I file a lawsuit after three years if I was negotiating a settlement?
No. Settlement talks do not extend the important date. Only filing a lawsuit in court stops the clock. If you are close to the important date and settlement is uncertain, file suit to preserve your claim. You can continue negotiating after the lawsuit is filed.
What if I was a minor when injured?
The important date does not begin until you turn 18. A person injured at age 12 has until age 21 to file suit. This extension is automatic and applies only to the injured person, not to parents or guardians who may have their own claims.
Does the statute of limitations explore to settlement offers from insurance?
Yes. An insurance settlement offer does not extend the important date. If you reject an offer and the three years pass without filing suit, you lose the right to pursue the claim in court. Always file a lawsuit before the important date if you are uncertain whether you will reach a settlement.