If Someone Rear-Ends You, Whose Insurance Do You Call?

October 16, 2025Car AccidentsWritten by Jeff Singer

If someone rear-ends you, whose insurance do you call? For many drivers, the answer seems obvious: the person who hit you should cover the costs. In most rear-end collisions, that’s true—the other driver is often held responsible for the damage. Still, your insurer should also be in the loop. Early notification can preserve benefits under your policy, trigger any medical payments coverage, and give you protection if the other driver is uninsured or disputes fault.

Reaching out to both companies keeps the claims process moving and creates a paper trail that may protect your rights later. At Goldblatt + Singer, we work with St. Louis drivers daily to help them take the proper steps in the correct order so they can recover fully after a crash.

Contact a Goldblatt + Singer St. Louis Personal Injury Lawyer Today

What Is A Rear-End Accident?

A rear-end accident occurs when one vehicle strikes the back of another, usually because the following driver fails to slow or stop in time. These collisions often result from sudden changes in traffic speed, distracted driving, or unsafe following distances. They can occur in heavy traffic, at intersections, or when a lead vehicle slows unexpectedly and the driver behind cannot react quickly enough.

Although many rear-end crashes happen at lower speeds, the impact can still cause serious property damage and a wide range of injuries. Whiplash, soft tissue damage, spinal injuries, and concussions are common, even when vehicles appear only slightly damaged. The abrupt force can jolt occupants forward, creating injury risks that may not be immediately obvious.

car accident

Causes Of Rear-End Accidents

Rear-end accidents can happen for many reasons, but the most common causes involve driver inattention or unsafe driving behaviors. In our experience handling auto collision cases, we see specific patterns repeat:

Driver-related causes

  • Distracted driving: Looking at a phone, adjusting controls, eating, or engaging in conversation can take focus away from the road. Even glancing away for two or three seconds at highway speeds can mean traveling the length of a football field without noticing the vehicle ahead.
  • Excessive speed: Higher speeds reduce the time and distance available to stop safely, especially in urban traffic where braking can be unpredictable.
  • Following too closely (tailgating): Leaving little room between vehicles makes it nearly impossible to stop in time when traffic slows.
  • Impaired driving: Alcohol or drug use affects judgment, coordination, and reaction time.
  • Drowsy driving: Fatigue slows reflexes and impairs decision-making, increasing the risk of failing to brake in time.
  • Aggressive driving: Rapid acceleration, weaving through lanes, or sudden braking can lead to misjudged distances and unsafe maneuvers.
  • Sudden stops: A lead vehicle’s unexpected or panicked stop can surprise a following driver, particularly if they are distracted or too close.

Vehicle and environmental factors

  • Poor weather conditions: Rain, ice, snow, or fog can reduce traction and visibility, requiring greater stopping distances.
  • Mechanical malfunctions: Faulty brakes, worn tires, or other mechanical issues can prevent timely stopping.
  • Poor road conditions: Potholes, uneven pavement, or debris can cause drivers to brake suddenly or lose control.
  • Traffic congestion: Heavy traffic places vehicles closer together, leaving less room to react to changes in speed.

While driver negligence is the leading cause, road design issues or defective vehicle components can also play a role. Identifying every contributing factor is critical because it may open additional avenues for compensation beyond the at-fault driver’s insurance.

Steps To Take After A Rear-End Accident

In the moments after a rear-end collision, what you do next can significantly impact your safety, health, and ability to recover compensation. Following a clear process will help protect your rights and strengthen your insurance claim.

  1. Prioritize safety: Check for injuries to yourself, passengers, and anyone else involved. If someone appears hurt, avoid moving them unless necessary to prevent further harm. If your vehicle is drivable, move it to a safe location away from traffic. Turn on your hazard lights to alert approaching drivers and reduce the risk of another crash.
  2. Call for assistance: Call 911 and report the collision. A police report provides an official account of events that can be valuable for insurance purposes. If anyone is hurt, request medical help.
  3. Gather information: Photograph vehicle damage, skid marks, traffic signs, and the surrounding scene. Exchange names, contact information, license and plate numbers, and insurance details with the other driver. Note the names and contact details of any witnesses.
  4. Seek medical evaluation: Some injuries take time to develop symptoms. A prompt examination creates a medical record linking your condition to the crash. Keep documentation of all visits, treatments, and expenses.
  5. Notify your insurer: Contact your insurance company quickly to begin the claims process and comply with policy requirements.
  6. Consider legal guidance: A car accident lawyer can help you understand your rights and options for pursuing compensation. An attorney can also handle communications with insurance companies, giving you more time to focus on recovery.

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Whose Insurance Company Should I Contact?

In most Missouri rear-end collisions, the at-fault driver’s liability insurance is generally responsible for covering medical expenses, lost income, and vehicle repairs. Still, it is equally important to notify your insurance company, even if you are confident you were not at fault. Doing so protects your rights and ensures you can access all potential benefits under your policy.

There are several reasons to contact your insurer after a crash:

  • Policy requirements: Many insurance policies require prompt reporting of any accident, regardless of fault, or may deny coverage.
  • Uninsured/underinsured motorist claims: Your policy will be liable to provide benefits if the accident was the fault of an at-fault driver who has either no insurance or inadequate coverage.
  • Medical payment coverage: Some coverages have “med pay,” which will cover some immediate medical expenses while liability is still being determined.
  • Fault disputes: Your insurer will also step in to protect your interests when another insurance company denies or disputes liability for the accident.

The Missouri Department of Revenue notes that certain accidents must be reported. Waiting too long can affect your ability to recover through your coverage.

If you think your insurance company is mishandling your claim or acting in bad faith, Goldblatt + Singer can step in and negotiate a fair settlement with the insurer; if necessary, we can also pursue claims against the bad faith insurer.

How Fault Is Determined In Rear-End Collisions

In most cases, the driver in back is presumed to be at fault, as every motorist is expected to keep a safe following distance and be prepared for sudden changes in traffic. That said, the presumption isn’t absolute.

Liability may shift, or be shared, if the lead driver stopped abruptly without reason, reversed into another vehicle, or had faulty brake lights. Building this type of case usually relies on evidence, such as dashcam footage, photos from the scene, credible witness accounts, or traffic camera recordings. In some cases, accident reconstruction experts may analyze skid marks, vehicle damage, and speed data to establish what happened.

While insurance companies make their own determinations, their conclusions are not the final word. An attorney can review the evidence, challenge inaccurate assessments, and ensure all relevant details are considered before fault is finalized and any settlement is accepted.

Contacting A Car Accident Lawyer

If someone rear-ends you, whose insurance do you call? This is a question many drivers face after a collision, and a choice that can influence your recovery. Goldblatt + Singer helps drivers in St. Louis address insurance disputes, protect their rights, and work toward full compensation. Call (314) 231-4100 today to arrange a free consultation.

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Jeffrey Singer

Jeff Singer, Managing Partner at Goldblatt + Singer for over a decade, is a seasoned personal injury attorney known for his compassionate yet tough advocacy. He has resolved hundreds of cases and recovered millions for clients. Recognized as a Missouri Super Lawyer and Top 100 National Trial Lawyer, Jeff also serves on the Missouri Bar’s Chief Disciplinary Committee and the Board of Governors for the Missouri Association of Trial Attorneys.

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This page has been created, edited, and reviewed by a team of legal writers following our thorough editorial guidelines. It was approved by our Founding Partner, Jeffrey Singer, who has over 30 years of experience as a personal injury attorney.