A car accident sets off two clocks at once, one for your health and one for your insurance claim. The claim side of that process follows a similar shape almost everywhere in the country. You report the crash, an insurer investigates, someone pays for the damage and the medical bills, and the file eventually closes. What changes from state to state is who pays first, how fault gets weighed, and how long you have to act. This guide walks through the national process from start to finish and flags where state law bends it.
How your state decides who pays first
Most states run on a fault-based, or tort, system. If another driver caused the wreck, that driver's bodily injury liability and property damage liability coverage is supposed to pay your claim.1 A dozen states instead run some version of no-fault insurance, where your own personal injury protection pays your initial medical bills and lost wages regardless of who caused the crash, and you can only step outside your own policy and sue the other driver once your injuries cross a dollar or severity threshold set by state law. Florida is the most cited example. Its no-fault statute requires every auto policy to carry at least $10,000 in PIP benefits, covering 80 percent of reasonable medical expenses and 60 percent of lost wages, and it conditions the full benefit on getting treatment within 14 days of the crash.2
Layered on top of either system are optional coverages that change how a claim gets funded. Medical payments coverage pays medical bills regardless of fault up to a small limit, collision coverage pays for damage to your own vehicle, comprehensive coverage pays for non-collision damage like theft or weather, and uninsured or underinsured motorist coverage stands in for the other driver's liability policy when that driver has none or not enough.1 In 2024, police reported roughly 6.18 million traffic crashes nationwide, about 39,250 of them fatal, so the process described here handles an enormous volume of claims every year.3
How fault actually gets decided
Even in no-fault states, fault still matters once an injury claim is serious enough to go outside PIP, and in every state it decides who owes what for vehicle damage. Most states use some form of comparative negligence, splitting the payout by percentage of fault. Colorado's statute is typical of the modified version. A driver who is less than 50 percent at fault can still recover damages, reduced by their own share of fault, but a driver found 50 percent or more at fault recovers nothing.4 A handful of states set that bar at 51 percent instead, and a few use pure comparative negligence, where you can recover something even if you were mostly at fault, just reduced accordingly.
Four states and the District of Columbia are the exception. Alabama, Maryland, North Carolina, Virginia, and D.C. still follow contributory negligence, under which any fault on your part, even a small amount, can bar you from recovering anything at all. Maryland's highest court reaffirmed the rule as recently as 2013, declining to replace it with comparative negligence and leaving that decision to the legislature.5 If you were hurt in a crash in one of these jurisdictions, how the police report and witness statements describe your actions can matter more than it would elsewhere.
Reporting the crash and opening the claim
Before any of that paperwork exists, the evidence from the scene does the most work. Photos of vehicle positions, damage, license plates, and road conditions, the other driver's insurance and contact information, and the names and numbers of any witnesses all shape how the adjuster reconstructs what happened. Police reports capture a lot of this, but officers aren't always called to minor crashes, and their notes don't always reflect every detail. Whatever you collect at the scene becomes part of the file the adjuster works from once a claim opens.
The claim clock usually starts with two separate reports, one to police and one to your insurer. Most states require police notification when a crash causes injury, death, or damage above a set dollar amount, and that report becomes the first document every adjuster asks for. Separately, your policy's own terms require you to notify your insurer promptly, regardless of who was at fault, since a delay in reporting can give the insurer grounds to question the claim later.
Once you report, the insurer opens a claim file and assigns an adjuster, who becomes your point of contact for everything from the property damage estimate to your medical bills. If the crash wasn't your fault, you generally have a choice. File with your own insurer, who investigates the claim, pays you, and then seeks reimbursement from the at-fault driver's insurer through a process called subrogation, or file a third-party claim directly against the at-fault driver's carrier. Filing with your own insurer is often faster, since you have a direct contract with that company. A third-party claim depends on a company that has no obligation to prioritize your file the way it would one of its own policyholders.
Adjusters often ask for a recorded statement early in the process. Cooperating with your own insurer is part of your policy's requirements, but you're not obligated to give a recorded statement to the other driver's insurer at all. Anything you say gets used to evaluate the claim, so stick to facts you're sure of and avoid guessing about speed, distance, or who had the right of way.
What the insurer is required to actually do
Insurance companies don't get unlimited time to sit on a claim. Every state has adopted some version of a model act written by state insurance regulators that sets baseline standards for how carriers handle claims, including acknowledging a claim, investigating it, and settling it once liability is clear. Arizona's version of the law requires an insurer to acknowledge notice of a claim within 10 working days and complete its investigation within 30 days absent a reasonable justification for taking longer.6 Other states write specific day counts into their own versions of the same model law rather than a general reasonableness standard, but the underlying structure is consistent nationwide: prompt acknowledgment, reasonable investigation, and prompt payment once liability is established.
In practice, timelines track how complicated the crash is. A 2025 industry study of auto claims satisfaction put the average vehicle repair cycle at 19.3 days, down from 22.3 days the year before, with newer vehicles carrying advanced driver-assistance features taking longer because of sensor calibration work.7 Simple, undisputed property damage claims commonly close within three weeks. Claims involving disputed fault, serious injuries, or a possible total loss routinely stretch into months, since evaluating medical treatment and long-term prognosis takes longer than estimating body panels.
Repairs, total loss, and diminished value
For vehicle damage, the adjuster either inspects the car directly or sends you to a network repair shop for an estimate. If repair costs come in low enough, the insurer authorizes the shop to fix the car and pays the bill. If the damage is severe, the insurer runs a total loss calculation instead. States handle that calculation one of two ways: a total loss threshold, which compares repair cost to a fixed percentage of the car's actual cash value, or a total loss formula, which adds repair cost to projected salvage value and compares the sum to actual cash value. Wisconsin's statute is a clean example of the threshold method. Once a claim payment, including your deductible, exceeds 70 percent of the vehicle's fair market value, the insurer has to notify the state that the car meets the legal definition of a salvage vehicle.8 Other states set that threshold anywhere from 60 to 100 percent, so the same damage can total a car in one state and only need repairs in the state next door.
Some policies also cover a rental car or loss of use while your vehicle is in the shop, or while a total loss payout is being worked out, but only if you carry that optional coverage yourself or the at-fault driver's insurer has accepted liability on a third-party claim. Confirm what the applicable policy actually covers before assuming a rental car comes with it.
Diminished value, the drop in resale value a car suffers even after a proper repair, is a separate claim from the repair bill itself, and states differ sharply on whether and how you can collect it. Georgia's Supreme Court set an early and influential precedent, ruling that an insurer's obligation to pay for a covered loss includes the diminished value left behind after repairs, not just the repair invoice.9 Many states allow diminished value claims only against the at-fault driver's insurer, not your own, and a few limit or bar them outright, so whether this money is available to you depends heavily on where the crash happened.
The injury side of the claim
Property damage and injury claims move on different tracks even when they come out of the same accident. The injury claim doesn't really take shape until your medical treatment does, since the adjuster is evaluating documented, ongoing treatment records rather than a single estimate. That's part of why insurers rarely make a real settlement offer on a significant injury claim until you've finished treatment or reached maximum medical improvement, the point where your condition has stabilized.
Attorney involvement changes the shape of these claims. Research from an insurance industry research group found that about half of bodily injury claimants hire an attorney. In the same data, represented claimants ended up with lower net payments, after legal fees, than claimants who negotiated on their own.10 The math shifts with the type of claim. Disputed fault, serious or permanent injury, and denied claims all tend to favor bringing in help, while a straightforward, undisputed soft-tissue claim may not need it. The legal directory is a place to start if your case fits the first category.
Deadlines that can end a claim before it starts
Two different clocks limit your options, and mixing them up is a common and costly mistake. The first is your policy's notice requirement, the obligation to tell your own insurer about the crash promptly. The second is the statute of limitations, the state-set deadline for filing an actual lawsuit if the claim doesn't settle. These deadlines vary widely. California gives you two years from the date of the crash to sue for personal injury,11 while other states allow as little as one year or as many as six. Property damage claims sometimes run on a different clock than injury claims within the same state. Missing the lawsuit deadline doesn't just weaken your case, it ends it, regardless of how clear the fault or how serious the injury.
If the insurer stalls, lowballs, or denies
You have somewhere to go if a claim isn't being handled fairly. Start by putting your issue in writing to the insurer and asking for a specific reason tied to your policy language. If that doesn't resolve it, every state has a department of insurance that investigates complaints about unfair claim delays, lowball offers, and failure to honor policy terms.12 Before filing, gather your policy number, a full timeline of your communications with the insurer, and a written account of what happened, since the department forwards your complaint to the company and requires a written response before making a determination.12
A denial or a settlement offer that doesn't cover your bills isn't necessarily the final word. Ask for the offer in writing, get an independent repair estimate or medical opinion where the dispute is about amount rather than coverage, and escalate to a complaint with your state's insurance department or to legal advice when the insurer won't move. The legal directory can help you find someone who handles claim disputes in your state if it gets to that point.
This article explains general information about how car insurance claims typically work in the United States. It isn't legal advice, and the rules that actually apply to your claim depend on your state and the language of your own policy.
Sources
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NAIC, "Does your vehicle have the right protection? Best practices for buying auto insurance" - https://content.naic.org/article/consumer-insight-does-your-vehicle-have-right-protection-best-practices-buying-auto-insurance
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Florida Statutes, Section 627.736 (Florida Motor Vehicle No-Fault Law) - https://www.flsenate.gov/laws/statutes/2024/627.736
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NHTSA, "Research Note: Overview of Motor Vehicle Traffic Crashes in 2024" - https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/813791
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Colorado Revised Statutes, Section 13-21-111 - https://law.justia.com/codes/colorado/2023/title-13/damages-and-limitations-on-actions/article-21/part-1/section-13-21-111/
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Coleman v. Soccer Ass'n of Columbia, 432 Md. 679 (2013) - https://law.justia.com/cases/maryland/court-of-appeals/2013/9-12.html
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Arizona Revised Statutes, Section 20-461 - https://www.azleg.gov/ars/20/00461.htm
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J.D. Power, 2025 U.S. Auto Claims Satisfaction Study - https://www.jdpower.com/business/press-releases/2025-us-auto-claims-satisfaction-study/
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Wisconsin Statutes, Section 342.065(1)(c) - https://docs.legis.wisconsin.gov/document/statutes/342.065(1)(c)
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State Farm Mutual Automobile Insurance Co. v. Mabry, 274 Ga. 498 (2001) - https://law.justia.com/cases/georgia/supreme-court/2001/s01a0982-1.html
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Insurance Research Council, "Study Finds More Auto Injury Claimants Are Hiring Attorneys" - https://insurance-research.org/news/study-finds-more-auto-injury-claimants-are-hiring-attorneys
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California Code of Civil Procedure, Section 335.1 - https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=335.1&lawCode=CCP
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NAIC, "How Do I File a Complaint Against My Insurance Company?" - https://content.naic.org/article/how-do-i-file-complaint-against-my-insurance-company