What to Do After a Car Accident: The First 72 Hours

Every year, roughly 6 million car accidents happen on American roads. The overwhelming majority of the people in those crashes will do the same thing in the first 20 minutes: check if they're okay, pull out their phone, and take a few photos. Some will call the police. Most will exchange information with the other driver. And then they'll go home thinking they handled it.

They won't realize what they missed until weeks or months later — when the insurance adjuster disputes their claim, when the attorney asks for footage that no longer exists, or when their body starts to hurt in ways the adrenaline didn't let them feel at the scene.

This guide is built to close that gap. It walks through what actually needs to happen in the first hour, the first day, and the full 72 hours after a crash — and it explains why each step matters, not just what to do. By the end, you'll understand the evidence lifecycle of a car accident claim and what disappears if you wait too long.

First: what happens to your brain at the scene

Before the checklist, one piece of context that changes everything: the human brain is not operating normally in the first 15 to 30 minutes after a car accident. Cortisol and adrenaline spike immediately after impact. These hormones suppress higher-order cognition — your capacity to think in sequence, retain new information, and make careful decisions — while simultaneously masking physical pain. This is not weakness. It's neurobiology.

What this means practically: you will feel more capable than you are. You might think you got everything, took enough photos, remembered the critical details. Many people do not. Studies of crash victims consistently show that recall accuracy degrades within hours, and that what people believe they captured on their phone often turns out to be incomplete — wrong angles, missing VINs, unreadable license plates.

Knowing this in advance is your defense against it. The checklist below isn't just a list of tasks. It's a cognitive scaffold for a moment when your brain isn't at its best.

The immediate response: minutes 0 to 20

This is the highest-stakes window. Decisions made here — or not made — will affect everything that follows.

The 72-hour evidence window: what disappears and when

This is the part of car accident guides that almost never gets addressed — and it's arguably the most critical. Different types of evidence have different decay rates. Some last days. Some last hours. One type lasts less than 24 hours.

Understanding this timeline changes how urgently you act. It's not that the checklist items above are difficult to complete — it's that there is a specific window in which many of them can be completed at all.

Hours 1 to 24: what to do after you leave the scene

Leaving the scene doesn't mean the active phase is over. The 24 hours after a crash are when many of the most consequential decisions get made — or neglected.

Seek medical attention — regardless of how you feel

This deserves emphasis because the standard advice — "see a doctor if you feel injured" — consistently leads to claim problems. Soft tissue injuries from car crashes, including whiplash, muscle tears, and contusions, routinely have delayed onset. Concussions frequently go undetected in the immediate aftermath of a crash. Internal injuries can be present without obvious external symptoms.

There is also a legal dimension. Insurance adjusters are trained to look for gaps between the accident date and the first medical visit. A three-day gap is used as evidence that your injuries weren't serious. A one-week gap raises doubts about causation. A 14-day gap is treated by many adjusters as a near-presumption that the injuries predated the crash.

See a doctor within 24 hours. If your primary care physician can't see you that quickly, go to an urgent care clinic. The medical record establishing the date of first treatment is foundational evidence for any future claim.

Notify your insurance company — carefully

Most auto insurance policies require prompt notification of any accident. "Prompt" typically means 24 to 72 hours. Check your policy language — some policies use language like "as soon as practicable." Failing to notify in time can give the insurer grounds to deny coverage.

However, notifying is not the same as giving a recorded statement. You are typically not required to provide a recorded statement to your own insurer immediately — and you are never required to provide one to the other driver's insurer without legal representation. When you call, report the basic facts: when and where it happened, that it involved another vehicle, and that you will provide full information as it becomes available. Do not speculate about fault.

Document the camera footage situation

Within 24 hours of the crash, someone needs to send written preservation requests to any business or entity that may have footage. This means:

• Any retail stores, gas stations, or restaurants near the crash location
• Local traffic management authorities (for intersection cameras)
• Any business with visible exterior cameras within line-of-sight of the scene
• Neighboring residences with doorbell cameras (Ring, Nest, etc.) if applicable

The request should be in writing, state that you were involved in an accident at a specific location and time, and ask them to preserve any footage from that period. If you have an attorney, they can send formal preservation letters. If you don't yet, a written request from you provides some protection — a business that receives a written notice and destroys footage anyway may face additional legal consequences.

Write a detailed incident account — before your memory shifts

Within 24 hours of the accident, write a detailed account of everything you remember: the direction you were traveling, the speed you estimate you were going, what you saw in the seconds before impact, what happened during and immediately after impact, what the other driver said at the scene, what the weather and road conditions were. Be specific about time — not "around noon" but "I checked my phone at 11:47 AM just before the light changed."

This is not for anyone else to read. It's for you. Human memory is reconstructive, not archival — what you remember now is more accurate than what you'll remember in three months when a claims adjuster or attorney asks you the same questions. The contemporaneous account is the anchor.

Preserve all physical evidence from your vehicle

Do not authorize repairs until all damage has been professionally documented. If there is any likelihood of a contested claim or personal injury litigation, retain the damaged parts — do not allow the body shop to discard them. The degree and pattern of impact damage is evidence that can be used in accident reconstruction.

Hours 24 to 72: the follow-through most people skip

By day two or three, most crash victims have moved past the acute phase. This is when follow-through breaks down — and when many people make the mistakes that hurt their claims weeks later.

Get the police report and review it carefully

The official crash report is typically available within 24 to 72 hours after the accident. You can usually obtain it online through your local police department or DMV, or request a copy in person. Obtain it and read it carefully.

Police reports are not infallible. Officers are recording their observations under field conditions. They can get details wrong — misspelled names, incorrect vehicle descriptions, inaccurate witness accounts. If the report contains factual errors, they can often be corrected by contacting the reporting officer directly within a few days. Corrections become harder to make as time passes.

Also check: whether the officer noted any contributing factors (weather, road conditions, traffic control devices), whether citations were issued and to whom, and whether the other driver's information matches what you recorded at the scene.

Keep a symptom diary

If you were injured — even with injuries that seem minor — start a daily log of symptoms from day one. Include physical symptoms (pain location, severity on a 1–10 scale, how it affects daily activities), sleep disruption, emotional symptoms (anxiety, reluctance to drive, intrusive thoughts about the crash), and any medication you're taking. Date every entry.

This diary serves two purposes. First, it gives your treating physician a complete symptom picture, which leads to better care. Second, it is contemporaneous documentation of the impact the crash had on your life — which is directly relevant to any personal injury claim, particularly one involving pain and suffering damages.

Know the statute of limitations for your state

Every state has a deadline — the statute of limitations — within which a personal injury claim must be filed if litigation is pursued. Most states allow two to three years from the date of the accident for personal injury claims. Property damage claims may have different (sometimes shorter) deadlines. Missing this deadline permanently bars your claim, regardless of how strong the evidence is.

You don't need to decide right now whether you're going to pursue a claim. But you should know your deadline, and you should keep track of the date. If you're uncertain whether your injuries warrant an attorney consultation, err toward consulting — most personal injury attorneys offer free initial consultations and work on contingency, meaning you pay nothing unless you recover.

Consult a personal injury attorney before accepting a settlement

Insurance adjusters are trained to move quickly toward settlement. Their goal is to close the claim as cheaply as possible. Settlement offers — especially early ones — are almost always lower than the full value of the claim. Once you accept a settlement and sign a release, you waive your right to any future compensation related to that accident, even if injuries worsen or you discover damage you weren't aware of.

Before signing anything, at minimum get a free consultation from a personal injury attorney. Many will tell you within 30 minutes whether your claim is worth pursuing and what it might be worth. That information is free. The release you sign if you skip this step is not.

The master 72-hour checklist

Everything above, condensed into a single reference. Print it, save it, or install IncidentApp to have it in your pocket before you ever need it.

Special situations: what changes the standard advice

When the other driver is uninsured

Approximately 1 in 8 drivers in the United States is uninsured, according to the Insurance Research Council. If the other driver has no insurance, your own uninsured motorist (UM) coverage becomes your primary recourse. This makes documentation even more critical — you will be filing with your own insurer, who may still dispute liability and damages.

In an uninsured motorist situation, the police report is especially important. It's often the only official documentation of the other driver's identity and involvement. Do not let the other driver talk you out of calling police "to handle it privately" — this almost always benefits them, not you.

When you're injured and the other driver disputes fault

Disputed liability is the most common scenario in which claims fall apart. The other driver's insurance company's interest is to assign fault to you — even partial fault — which reduces their exposure in states with comparative negligence rules.

In a disputed liability case, the evidence you collected at the scene becomes the foundation of everything. Camera footage, witness statements, the position of vehicles before they were moved, the official crash report — these are what get used in negotiations and, if necessary, litigation. The thoroughness of your scene documentation directly affects how much leverage you have.

When a commercial vehicle is involved

Accidents involving commercial trucks, delivery vehicles, or rideshare cars carry additional complexity. Commercial vehicles are often operated under federal and state regulations that create additional documentation requirements — driver logs, vehicle inspection records, GPS data, and dash camera footage that the company controls. If a commercial vehicle was involved, consult an attorney quickly. These cases have specific evidence preservation requirements and shorter windows in which to act on them.

When you're in a rideshare vehicle

Uber and Lyft maintain their own insurance frameworks, and the coverage that applies depends on whether the driver was actively transporting a passenger, waiting for a match, or off-platform at the time of the crash. Rideshare accident claims involve multiple potential insurers — the driver's personal policy, the platform's commercial policy, and potentially your own UM coverage. Document everything and consult an attorney before negotiating with any of them.

What most guides won't tell you

The vast majority of what-to-do-after-a-car-accident content is written by insurance companies or by personal injury law firms whose primary goal is to get you to call them. Both have legitimate interests that are not entirely aligned with yours.

Insurance company guides consistently omit the footage window problem — because the faster evidence disappears, the easier claims are to minimize. Law firm guides tend to skip the self-help steps in favor of "call us first" — because a client who handles their own documentation competently is a less dependent client.

We built IncidentApp because we believe crash victims deserve a complete picture — not a partial one shaped by someone else's incentive structure. The app guides you through systematic documentation at the scene, automatically timestamps and cryptographically seals your evidence so it can't be disputed, and identifies nearby camera systems so footage preservation can start immediately.

It's free. It always will be. And it exists precisely for the moment when you need it and can't think clearly enough to remember the checklist.

Frequently asked questions