How to File a Personal Injury Lawsuit in Arizona: Every Step Explained (2026)

If you want to know how to file a personal injury lawsuit in Arizona, the short answer is: you must gather evidence, send a demand letter, file a complaint in the correct court before Arizona’s 2-year deadline, and then work through discovery and either settle or go to trial.

TL;DR: Key Takeaways

Arizona’s statute of limitations gives you 2 years from the injury date to file suit (A.R.S. 12-542).
If a government agency caused your injury, you must file a notice of claim within 180 days.
Cases under $10,000 go to Justice Court; cases up to $35,000 can use Limited Jurisdiction (Superior Court); larger claims go to Maricopa County Superior Court.
Evidence disappears fast, so document everything from day one.
An attorney can negotiate a higher settlement, handle procedural rules, and protect your rights at every stage.

Step 1: Seek Medical Treatment and Document Everything

Your health comes first. Go to the emergency room, urgent care, or your doctor as soon as possible after any accident. Beyond protecting your body, medical records are the single most important piece of evidence in a personal injury case. Insurers and defense attorneys look for gaps in treatment and use them to argue your injuries are not serious or were not caused by the accident.

Keep every receipt, every prescription bottle, every appointment summary, and every explanation of benefits from your health insurer. Start a pain journal the same day. Write down how your injuries affect your daily life, sleep, work, and relationships. These notes become powerful evidence later.

Step 2: Preserve Evidence Before It Is Gone

Evidence vanishes quickly. Surveillance footage is often overwritten within 24-72 hours. Skid marks fade. Witnesses forget details. Take the following steps as soon as you are physically able:

Photograph the accident scene, vehicle damage, road conditions, and your visible injuries.
Get the names and contact information of every witness.
Request a copy of the police or incident report.
Send a written evidence preservation letter to the other party and any businesses that may have footage.
Do not post about the accident on social media. Defense attorneys routinely search plaintiff profiles.

Step 3: Understand Arizona’s 2-Year Statute of Limitations

One of the most critical considerations when filing a personal injury lawsuit in Arizona is the filing deadline. Under A.R.S. 12-542, you generally have 2 years from the date of your injury to file a lawsuit. Miss that deadline and the court will almost certainly dismiss your case, no matter how strong it is.

There are important exceptions and shorter deadlines to know:

Government defendants: If a city, county, or state agency caused your injury, such as a negligent city bus driver or a poorly maintained government road, you must file a Notice of Claim within 180 days of the injury under A.R.S. 12-821.01. Skipping this step bars your lawsuit entirely.
Minors: The clock generally does not start until the child turns 18.
Discovery rule: In some cases, such as delayed-onset injuries, the 2-year period starts when you discovered, or reasonably should have discovered, the injury.

When in doubt, consult an attorney immediately. Waiting is the riskiest thing you can do.

Step 4: Send a Demand Letter to the Insurance Company

Before filing in court, most injury claims go through an insurance negotiation phase. Once you have reached maximum medical improvement (the point where your condition has stabilized), your attorney, or you, can send a formal demand letter to the at-fault party’s insurer.

A strong demand letter includes: a summary of the facts, a description of your injuries and treatment, all medical bills and lost wage documentation, and a specific dollar amount you are willing to accept to settle. The insurer will respond with an offer, a denial, or a counteroffer. Many cases resolve here. If negotiations stall or the offer is unreasonably low, filing a lawsuit is the next step.

Step 5: How to File a Personal Injury Lawsuit in Arizona, Court by Court

Choosing the right court matters. Filing in the wrong court can cause delays or dismissal.

How to file a personal injury lawsuit in Arizona based on your damages amount

Justice Court: Claims up to $10,000. Each city or precinct has its own Justice Court. Maricopa County has multiple locations listed on the Maricopa County Superior Court website.
Superior Court, Limited Jurisdiction: Claims up to $35,000. Simplified rules apply.
Superior Court, General Civil Division: Claims over $35,000. This is where most serious personal injury cases are filed.

To start your lawsuit, you or your attorney will file a Complaint that names the defendant(s), states the facts, identifies the legal theory (negligence, for example), and states the relief you are seeking. You will also file a Summons. Pay the filing fee, which varies by court and claim amount. The defendant must then be formally served with the Complaint and Summons. In Arizona, service must typically be completed within 90 days of filing.

Step 6: Navigate Discovery, Depositions, and Mediation

After the defendant files an Answer, the case enters the discovery phase. Both sides exchange information through:

Interrogatories: Written questions each side must answer under oath.
Requests for Production: Demands for documents, photos, medical records, and other evidence.
Depositions: Sworn, recorded testimony taken outside of court. You, the defendant, and expert witnesses may all be deposed.

Arizona courts strongly encourage alternative dispute resolution. Most Maricopa County Superior Court judges will order mediation before allowing a case to proceed to trial. A neutral mediator helps both sides reach a voluntary settlement. Roughly 95% of personal injury cases settle before a jury verdict, and many settle during or after mediation.

Step 7: Prepare for Trial or Finalize Your Settlement

If mediation fails, your case proceeds to trial. Your attorney will select a jury, present opening statements, call witnesses, introduce evidence, cross-examine defense witnesses, and deliver closing arguments. The jury then decides liability and damages.

If you reach a settlement at any point, you will sign a release of all claims in exchange for the agreed payment. Once signed, you generally cannot pursue further claims related to that injury. Review every settlement carefully with an attorney before signing.

Where an Attorney Changes the Outcome

You can technically handle a personal injury claim yourself, but an experienced attorney typically recovers significantly more, even after legal fees. Here is where professional help matters most:

Identifying all liable parties you might have missed.
Meeting the 180-day government notice deadline without error.
Calculating the full value of future medical costs and lost earning capacity.
Handling complex discovery disputes and depositions.
Negotiating from a position of strength because the insurer knows you are ready for trial.

Most Arizona personal injury attorneys work on a contingency fee, meaning you pay nothing unless you win.

Frequently Asked Questions

How long do I have to file a personal injury lawsuit in Arizona?

In most cases, you have 2 years from the date of your injury under A.R.S. 12-542. If a government entity is involved, you have only 180 days to file a Notice of Claim. Missing either deadline will almost certainly end your case.

Do I have to go to court to resolve my personal injury claim in Arizona?

Not necessarily. The majority of personal injury claims settle through insurance negotiations or mediation before trial. However, filing a lawsuit is often necessary to push the insurance company toward a fair settlement, even if the case never reaches a jury.

Which court do I file my personal injury lawsuit in Maricopa County?

It depends on the value of your claim. Claims up to $10,000 go to Justice Court. Claims up to $35,000 may use the Superior Court’s limited jurisdiction process. Claims above $35,000 are filed in the Maricopa County Superior Court General Civil Division in Phoenix.

What if the person who injured me works for the city or state of Arizona?

Government liability cases have strict extra requirements. You must serve a written Notice of Claim on the government agency within 180 days of your injury under A.R.S. 12-821.01. Failing to do this on time bars you from suing. Hire an attorney immediately if a government employee or agency is involved.

How much does it cost to file a personal injury lawsuit in Arizona?

Court filing fees in Maricopa County Superior Court typically range from a few hundred dollars depending on the claim type and amount. Most personal injury attorneys handle cases on a contingency fee basis, meaning you pay no upfront legal fees. The attorney takes a percentage of your recovery only if you win.