To sue someone after a car accident, you file a civil complaint against the at-fault driver in the right court, serve them with the paperwork, and move the case through discovery toward settlement or trial. Before any of that, you need to confirm your state’s rules allow the suit, meet the filing deadline, and usually try to settle with the insurer first. Most car accident disputes never reach a courtroom; a lawsuit is what you file when the insurance company denies the claim, disputes fault, or offers far less than your losses are worth.
Confirm You Can Actually Sue
Not every injured driver has the right to file. Thirteen states run “no-fault” insurance systems that restrict lawsuits after a crash. In those states, your own policy pays your medical bills and lost wages regardless of fault, and you can sue the other driver only if your injuries clear a specific threshold. Some states use a dollar threshold on medical expenses, ranging from roughly $1,000 to $50,000. Others require a serious injury like permanent disability, significant disfigurement, or a bone fracture. The no-fault states are Florida, Hawaii, Kansas, Kentucky, Massachusetts, Michigan, Minnesota, New Jersey, New York, North Dakota, Pennsylvania, and Utah. Check your state’s threshold before you invest time in a suit you may not be allowed to bring.
Every personal injury claim also has a filing deadline called a statute of limitations. It ranges from one to six years by state, with two or three years most common. Miss it and the court dismisses your case no matter how strong the evidence. The clock usually starts on the date of the accident, though some states pause it when an injury wasn’t immediately discoverable. Find your state’s deadline early and work backward.
Start With the Insurance Claim
Filing suit is rarely the first move. You typically open a claim with the at-fault driver’s insurer, an adjuster reviews the evidence, and a settlement offer follows. That first offer is almost always low, and negotiation goes from there. A lawsuit becomes the right step when the insurer denies the claim, disputes who caused the crash, or refuses to offer anything close to your actual losses.
Many attorneys send a formal demand letter before filing. The letter lays out the facts, describes your injuries, itemizes your losses, and states a specific dollar figure you’ll accept. It isn’t legally required, but it gives the insurer one last chance to settle before litigation costs mount and creates a paper trail showing you tried in good faith. If the insurer ignores it or lowballs the response, that record helps you once you’re in front of a judge.
Know How Fault Rules Affect What You Can Recover
Your own share of fault can shrink your recovery or wipe it out entirely, and states handle this differently.
- Pure comparative fault, used in about 10 states, reduces your compensation by your percentage of fault but lets you recover something even if you were mostly responsible. Seventy percent at fault on a $100,000 loss means $30,000.
- Modified comparative fault, used in about 35 states, reduces compensation by your fault percentage up to a cutoff. Roughly half of these states bar recovery at 50% fault; the rest use a 51% cutoff.
- Pure contributory negligence, the harshest rule, bars any recovery if you were even 1% at fault. It applies in Alabama, Maryland, North Carolina, Virginia, and the District of Columbia.
The other driver’s attorney will look for any evidence you contributed to the crash: a rolling stop, distracted driving, a burned-out taillight. If you were partly at fault, the case isn’t hopeless in most states, but you need to know the math before you commit.
Build the Evidence File
Car accident cases live or die on documentation. Start collecting immediately, because memories fade and physical evidence disappears.
- The police or accident report. This is the closest thing to a neutral record: driver statements, officer observations, citations issued, and sometimes a preliminary fault determination.
- Medical records and bills covering every visit, scan, surgery, prescription, and therapy session tied to the crash. Gaps in treatment are the first thing a defense attorney will exploit.
- Proof of lost income: pay stubs, tax returns, or a letter from your employer.
- Vehicle repair estimates or, for a totaled car, documentation of its pre-accident value.
- Photos and video of the scene, damage, road conditions, signals, and visible injuries. Dashcam or surveillance footage carries real weight.
- Witness names and contact information. Witnesses get harder to find as time passes.
For non-economic damages like pain and lost quality of life, keep a daily journal describing how the injuries affect your routine. Contemporaneous notes carry more weight than testimony reconstructed months later.
Pick the Right Court
Car accident suits are filed in civil court, but which one depends on the money at stake and where the crash happened.
If your total damages are modest, small claims court may work. These courts handle disputes up to a state-set limit, ranging from $2,500 to $25,000. The process is faster, filing fees are lower, and you generally don’t need a lawyer. The trade-off: some small claims courts don’t allow attorneys at all unless both sides agree, and in some places you can’t appeal. Small claims fits fender-benders with clear fault and modest property damage, not serious injuries or contested liability.
For larger claims, you file in your state’s general civil court. Jurisdiction usually means the county where the accident occurred or where the defendant lives. Filing in the wrong county can bring delays or dismissal, so verify the rules before submitting.
Draft the Complaint
The complaint is the document that officially starts the lawsuit. It tells the court and the defendant what happened, why the defendant is legally responsible, and what you want. Every complaint has four basic parts.
The caption sits at the top and identifies the court, lists you as plaintiff and the other driver as defendant, and eventually shows a case number assigned by the clerk. Under federal rules and most state rules, the caption must name all parties.1Legal Information Institute. Federal Rules of Civil Procedure Rule 10
Next comes the statement of facts, telling the story of the accident in plain, chronological terms: where and when it happened, what each driver was doing, and how the collision unfolded. It draws on the police report, witness statements, and your own account. Then come the legal claims, explaining why the defendant owes you compensation. In most car accident cases the core claim is negligence: the other driver failed to operate their vehicle with reasonable care, and that failure caused your injuries. The last section is the request for relief, where you specify what you’re seeking, including medical expenses, lost income, property damage, and pain and suffering.
File the Lawsuit
Once the complaint is ready, you file it with the court clerk. Many courts now accept electronic filing through an online portal. Courts that don’t offer e-filing require you to bring the original plus copies in person.
Filing requires a fee. State court fees for general civil cases commonly run a few hundred dollars, depending on jurisdiction and claim type. Federal court civil filing fees are currently $405. If you can’t afford the fee, most courts allow a fee waiver through a financial hardship form, sometimes called an in forma pauperis petition. Once the clerk accepts the complaint and collects the fee, they stamp it with a filing date, assign a case number, and issue a summons, which is the official notice that the defendant must respond.
Serve the Defendant
Filing puts the case on the docket, but the defendant doesn’t officially know about it until you deliver the paperwork. This is service of process, a constitutional requirement: the defendant has the right to be notified and to respond. You can’t mail the complaint yourself or hand it over informally. Service must be performed by someone who is not a party to the lawsuit.2Legal Information Institute. Federal Rules of Civil Procedure Rule 4
The two most common options are the county sheriff’s office and a private process server. Either will personally deliver the summons and a copy of the complaint. If the defendant can’t be found at home or work, most states allow substitute service, which usually means leaving the documents with another adult at the defendant’s residence. Costs run from around $40 to a few hundred dollars depending on method and location. After delivery, the server files a proof of service with the court, a sworn statement of when, where, and how the papers were delivered. Without that filing, the court has no record the defendant was notified, and the case can’t move forward.
What Happens After Service
The Answer or a Default
The defendant has a limited window to respond. In federal court the deadline is 21 days after service.3Legal Information Institute. Federal Rules of Civil Procedure Rule 12 State court deadlines vary but typically fall between 20 and 30 days. The response, called an answer, goes through the complaint point by point, admitting or denying each allegation and raising defenses. Common defenses in car accident cases include arguing you were partly or fully at fault, that your injuries predated the accident, or that you failed to mitigate damages by delaying treatment.
If the defendant ignores the lawsuit entirely, you can ask the court for a default judgment, which is essentially a win by forfeit. In practice, most defendants (or their insurers’ attorneys) do respond, so defaults are uncommon in car accident cases. It remains an important backstop if the other driver disappears.
Discovery
Once the defendant answers, both sides exchange evidence in discovery. This is often the longest phase. The tools include interrogatories (written questions answered under oath), document requests (for records like phone logs, vehicle maintenance history, or insurance correspondence), and depositions (face-to-face questioning transcribed by a court reporter). Discovery is where cases take shape. Both sides see how strong the evidence really is, and that clarity often pushes the case toward settlement.
Pre-Trial Motions and Settlement
Before trial, either side can file motions to resolve parts of the case early. The most significant is a motion for summary judgment, arguing the evidence is so one-sided there’s nothing for a jury to decide. If the judge finds any genuine factual dispute, the motion is denied and the case continues.
Many courts require or strongly encourage mediation before trial, where a neutral third party helps both sides negotiate. It’s not binding unless both parties agree to a settlement. Most car accident lawsuits settle before trial, either during discovery or after mediation, because litigation is expensive and trial outcomes are unpredictable on both sides. A well-prepared case with strong evidence creates leverage that often makes trial unnecessary.
What a Lawsuit Costs
Most car accident attorneys work on a contingency fee. There’s no upfront charge; the attorney takes a percentage of what you recover, typically around 33% if the case settles before trial and 40% or more if it goes to trial. If you lose, you owe nothing in attorney fees.
Beyond attorney fees come case costs: the filing fee, process server charges, fees for obtaining medical records and police reports, expert witness fees for accident reconstruction or medical testimony, and deposition transcripts. In a contingency arrangement the attorney usually advances these costs and deducts them from the settlement or verdict. Read the fee agreement carefully to see who pays costs if you lose, because practices vary. In small claims, you can typically handle the case yourself, keeping costs limited to filing and service.
Liens Against Your Settlement
Winning doesn’t mean you pocket the full amount. If your health insurer, Medicare, or Medicaid paid for accident-related care, those payers have a legal right to be reimbursed from your recovery. This is subrogation: the insurer steps into your shoes and claims part of your settlement to recover what it spent on treatment.
Medicare’s reimbursement right is backed by federal law with real teeth. If Medicare’s conditional payments aren’t repaid from a settlement, the program can pursue the money from you, your attorney, or even the defendant’s insurer, with penalties that can include double the amount owed. Medicaid and private health insurers with subrogation clauses have similar recovery rights, with specifics varying by state and policy.
These claims are paid off the top before you see the remaining funds. On a $50,000 medical bill paid by your health insurer and an $80,000 settlement, the subrogation claim comes out first, along with the attorney’s fee and case costs. What’s left is yours. Ignoring these obligations can freeze the funds, trigger collection actions, and jeopardize future government benefit eligibility. When a lien exists, an attorney can often negotiate it down, but it has to be resolved before the money is distributed.