If you have been injured in a car accident, one of the first questions you probably have is: how long is this going to take? You are dealing with medical bills, lost wages, and physical pain. You want answers, and you want them now.

The honest answer is that every car accident case is different. Some resolve in a few months through a fair insurance settlement. Others take a year or more and end up in front of a jury. But most Missouri car accident cases follow a predictable path, and understanding that path can help you make better decisions about your case.

This guide walks you through the typical timeline of a Missouri car accident lawsuit, from the initial demand letter through trial, so you know what to expect at each stage.

The Big Picture: 6 to 18 Months for Most Cases

Most car accident cases in Missouri resolve within 6 to 18 months. Cases that settle before a lawsuit is filed tend to wrap up faster — sometimes in 3 to 6 months after you reach maximum medical improvement. Cases that go through litigation typically take 12 to 18 months, and cases that actually reach trial can take 18 months to 2 years or longer.

The timeline depends on factors specific to your situation: the severity of your injuries, whether fault is disputed, the insurance company's willingness to negotiate, and the court's docket. Below is a phase-by-phase breakdown of what happens and how long each step typically takes.

Phase 1: Medical Treatment and Case Investigation (1-6 Months)

Before any legal action begins, you need to focus on getting better. Your attorney cannot accurately value your case until you have either fully recovered or reached maximum medical improvement (MMI) — the point where your doctors say your condition is unlikely to improve further with additional treatment.

During this phase, your attorney will:

Gather medical records and bills from all treating providers
Collect the police report and any accident reconstruction evidence
Document lost wages and other economic losses
Investigate the accident — photographing the scene, interviewing witnesses, preserving surveillance footage
Identify all insurance policies that may apply, including underinsured motorist coverage

This phase typically lasts 1 to 6 months, depending on the nature of your injuries. A soft tissue injury may reach MMI in weeks. A traumatic brain injury or spinal surgery may take six months or longer.

Why this matters for your timeline: Rushing to settle before you understand the full extent of your injuries is one of the most expensive mistakes an accident victim can make. Once you settle, you cannot go back and ask for more money if your condition worsens.

Phase 2: Demand Letter and Insurance Negotiation (1-3 Months)

Once your medical treatment stabilizes, your attorney sends a demand letter to the at-fault driver's insurance company. This letter outlines your injuries, medical expenses, lost income, pain and suffering, and the legal basis for the claim. It includes a specific dollar amount your attorney believes the case is worth.

The insurance company then has time to review the demand, evaluate the claim, and respond — typically with a counteroffer well below the demand. A round of negotiations follows. This back-and-forth usually takes 1 to 3 months.

Three outcomes are possible:

Fair settlement. The insurance company offers a reasonable amount and the case resolves without a lawsuit. This is the fastest path — your case could be done within 4 to 9 months of the accident.
Lowball offer. The insurer refuses to offer fair compensation. Your attorney recommends filing suit.
Denial. The insurance company disputes fault or denies the claim entirely. A lawsuit becomes necessary.

If the insurance company will not pay what your case is worth, the next step is filing a lawsuit. This is not a failure — it is leverage. Many cases that settle for fair value only do so after a lawsuit is filed.

Phase 3: Filing the Lawsuit (1-2 Months)

Your attorney files a petition in the appropriate Missouri circuit court, officially starting the lawsuit. Under Missouri Rule 53.01, a civil action is commenced by filing a petition with the court. The defendant must then be formally served with the lawsuit, which gives them 30 days to file an answer.

Under Missouri statute RSMo 516.120, you have five years from the date of the accident to file a personal injury lawsuit. While five years may sound like plenty of time, waiting too long weakens your case. Evidence disappears, witnesses forget details, and the insurance company uses the delay against you.

Once the defendant files an answer — and potentially asserts counterclaims or affirmative defenses — the case moves into discovery. Missouri Rule 55.33 allows either party to amend their pleadings as a matter of right before a responsive pleading is served, giving flexibility to adjust claims early in the case.

This phase typically takes 1 to 2 months from the decision to file through the defendant's answer.

Phase 4: Discovery (3-9 Months)

Discovery is the longest phase of most car accident lawsuits. It is the process by which both sides investigate each other's claims and defenses by exchanging documents, answering written questions, and taking sworn testimony. For an in-depth look at this process, see What Is Discovery in a Missouri Lawsuit?.

Missouri Supreme Court Rules 55 through 62 govern the discovery process. The key tools include:

Written discovery (1-3 months). Both sides exchange interrogatories (written questions answered under oath) and requests for production of documents — medical records, bills, employment records, insurance policies, cell phone records, and photographs.

Depositions (2-4 months). Attorneys take sworn testimony from the parties, witnesses, and experts. Your deposition — where the defense attorney questions you under oath — is one of the most important events in the case.

Independent medical examination. The defendant's insurer may require you to be examined by a doctor of their choosing to dispute the severity of your injuries or attribute them to a pre-existing condition.

Expert reports. Both sides may retain experts — accident reconstructionists, medical specialists, economists, and life care planners — with deadlines set by the court's scheduling order.

Discovery typically lasts 3 to 9 months, though complex cases involving multiple defendants, catastrophic injuries, or disputed liability can push this phase longer.

Phase 5: Mediation and Settlement Negotiation (1-2 Months)

After discovery, both sides have a much clearer picture of the case. This is when serious settlement negotiations typically happen. Most Missouri courts encourage or require mediation — a structured negotiation session with a neutral third party who helps both sides work toward a resolution.

Mediation is not binding. If the parties cannot agree, the case proceeds to trial. But mediation resolves the majority of cases that reach this stage. The mediator helps each side understand the risks of trial and the realistic range of outcomes.

Factors that influence settlement at this stage include:

Strength of liability evidence. Clear-cut fault cases settle more easily.
Severity of injuries. Serious, well-documented injuries command higher settlements.
Quality of medical documentation. Consistent treatment records are more persuasive than gaps in care.
Insurance policy limits. The available insurance coverage caps the realistic recovery in many cases.
Litigation costs. Both sides weigh the cost of going to trial against the expected outcome.

To understand how settlement amounts are calculated, see How Personal Injury Settlements Are Calculated in Missouri.

This phase usually takes 1 to 2 months.

Phase 6: Pre-Trial Motions and Trial Preparation (1-3 Months)

If mediation does not produce a settlement, the case moves toward trial. This phase involves:

Summary judgment motions. Either side may file a motion arguing that the evidence is so one-sided that a trial is unnecessary. For more on this process, see Summary Judgment in Missouri. These motions can take weeks or months for the court to decide.

Pre-trial motions. Attorneys file motions to exclude certain evidence, limit testimony, or resolve procedural disputes. Missouri Rule 66.02 gives the court authority to order separate trials on specific issues — for example, trying liability and damages separately.

Trial preparation. Your attorney prepares witness outlines, exhibit lists, opening and closing arguments, and jury instructions. This is intensive, detail-oriented work that directly impacts the outcome.

This phase typically takes 1 to 3 months, depending on the court's docket and the complexity of the motions.

Phase 7: Trial (3-7 Days for Most Car Accident Cases)

If your case reaches trial, a jury will hear the evidence and decide whether the defendant is liable and, if so, how much compensation you deserve. Most car accident trials in Missouri last 3 to 7 days, though complex cases can take longer.

The trial moves through jury selection, opening statements, each side's presentation of evidence and witnesses, closing arguments, and finally jury deliberation and verdict. After the verdict, the losing side may file post-trial motions or appeal, which can add months or years to the timeline.

Factors That Speed Up Your Case

Not every car accident case takes a year or more. Several factors can shorten the timeline:

Clear liability. When fault is obvious — a rear-end collision, a red-light runner with witnesses — the insurance company has less reason to fight.
Moderate injuries with good documentation. Cases with clear medical evidence and consistent treatment records are easier to value and settle.
Adequate insurance coverage. When the at-fault driver carries enough insurance to cover your damages, the insurer is more likely to negotiate.
Early attorney involvement. Hiring an attorney early ensures evidence is preserved and the case is built properly from the start.
Willingness to negotiate. Both sides approaching settlement in good faith accelerates resolution.

Factors That Delay Your Case

On the other hand, certain factors can extend the timeline significantly:

Disputed fault. If the insurance company argues you were partially or fully at fault, the case becomes more contentious and harder to settle.
Severe or ongoing injuries. You should not settle until you understand the full extent of your medical needs. Catastrophic injuries require more treatment time and more expert evaluation.
Multiple defendants. Cases involving multiple at-fault parties — chain-reaction collisions, rideshare accidents, commercial vehicle wrecks — involve more attorneys, more discovery, and more coordination.
Uncooperative insurance companies. Some insurers use delay as a tactic, hoping you will accept a lowball offer out of frustration or financial pressure.
Court congestion. Missouri courts vary in how quickly they can schedule trials. Urban dockets in St. Louis and Kansas City tend to be busier than rural circuits.

When Settlement Makes Sense vs. Going to Trial

Most car accident cases settle. Nationally, over 95% of personal injury cases resolve before trial. There are good reasons for this.

Settlement makes sense when:

The insurance company offers fair compensation for your injuries, lost wages, and pain and suffering
The risk of a defense verdict at trial outweighs the potential upside of a jury award
You need the money now — trial adds months or years of uncertainty
Both sides have a realistic view of the case value based on discovery

Trial makes sense when:

The insurance company refuses to offer anything close to fair value
Liability is strong and your damages are significant
You are willing to accept the uncertainty of a jury verdict for the possibility of a larger award
The case involves issues that a jury needs to decide — credibility disputes, punitive damages, or policy-limits cases where the insurer is acting in bad faith

Your attorney should help you weigh these factors honestly. The goal is not to go to trial for the sake of it — the goal is to get you the best possible outcome, whether that comes through settlement or a jury verdict.

Frequently Asked Questions

How long do I have to file a car accident lawsuit in Missouri?

Under RSMo 516.120, you have five years from the date of the accident to file a personal injury lawsuit. However, waiting too long weakens your case — evidence disappears, witnesses forget details, and insurers use the delay against you. Most attorneys recommend beginning the process well before the deadline.

Can I speed up my car accident case?

You can avoid unnecessary delays by following your treatment plan consistently, responding promptly to your attorney's requests, and being realistic about settlement offers. Some factors — the court's schedule, insurance company tactics, and medical treatment timelines — are outside your control.

What happens if the insurance company makes a lowball offer?

Your attorney will advise you on whether an offer is fair based on the evidence, your medical expenses, lost wages, and the severity of your injuries. If the offer is too low, your attorney can counter, escalate negotiations, or file a lawsuit to increase pressure. Filing suit does not mean you will go to trial — many cases settle for significantly more after a lawsuit is filed and the insurance company faces the prospect of a jury verdict.

Do most car accident cases go to trial in Missouri?

No. The vast majority of car accident cases — over 95% — settle before trial. Settlement avoids the cost, time, and uncertainty of a jury trial. However, having an attorney who is prepared and willing to go to trial strengthens your negotiating position. Insurance companies know which attorneys try cases and which do not, and that knowledge influences how aggressively they negotiate.

Will I have to testify if my case goes to trial?

Yes. If your case goes to trial, you will testify about the accident, your injuries, your medical treatment, and how the accident has affected your life. Before trial, you will also likely give a deposition — sworn testimony in front of the defense attorney. Your attorney will prepare you thoroughly for both. Honest, consistent testimony is your most powerful tool at trial.

Your Timeline Starts Now

Every day that passes after a car accident is a day that evidence can disappear, witnesses can forget, and the insurance company can build its case against you. The sooner you have an attorney protecting your interests, the stronger your case will be — and the faster it will move toward resolution.

You do not have to navigate this alone. If you have been injured in a car accident in Missouri, an experienced attorney can evaluate your case, explain your options, and fight for the compensation you deserve.

If you've been injured, you deserve someone who fights for you. Contact OTT Law at (314) 710-2740 for a free consultation.

This article is for informational purposes only and does not constitute legal advice. Every case is different, and outcomes depend on the specific facts and circumstances involved. If you need legal advice, consult a licensed Missouri attorney about your situation.

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