The Insurer Says I Was at Fault: How to Dispute It

An insurer's fault decision is an opinion, not a court ruling. When the other driver's insurer says you were at fault, or splits the blame 50/50, you can ask for the decision and its reasons in writing, send evidence it did not consider, and ask for a review. If that fails, you still have three routes: your own collision coverage (with your insurer pursuing the other side to recover your deductible), a complaint to your state's department of insurance, and a lawsuit, often in small claims court for vehicle damage.

The Texas Department of Insurance puts the starting point plainly: if the other insurer refuses to pay, "ask for their reason in detail and in writing."

How insurers decide fault

Each insurer makes its own liability decision. The adjuster usually looks at:

• Statements from both drivers, passengers and witnesses
• The police report, including any citation, diagram and narrative
• Damage location on each vehicle, which shows the angle and point of impact
• Photos and video: scene photos, dashcam, doorbell or business cameras
• Traffic rules that apply, such as right of way, following distance and lane changes
• Event data from the vehicles, in some serious cases

The decision is often expressed as a percentage, such as 100/0, 80/20 or 50/50. Those percentages matter because your state's fault rule decides how shared blame reduces what you can recover. In some states, a high enough share can bar your claim entirely. See comparative fault explained and try the fault and compensation estimator to see the effect in your state.

The other driver's insurer has no contract with you. Its adjuster works for the company and its customer. Your own insurer also makes a fault decision, which can affect your premium, and it may disagree with the other company.

Step 1: Get the liability decision in writing

Phone decisions are hard to challenge. Send a short email or letter asking for:

1. The fault percentage assigned to each driver
2. The facts and evidence the decision relied on
3. Whether they obtained the police report, and whether they spoke with your witnesses
4. Any recorded statements they took, or a summary of them
5. The name of a supervisor who can review the decision

Keep it factual. Do not argue the whole case in this first message. The goal is to learn what they think happened so you can answer it.

Step 2: Submit evidence that answers their reasons

Once you know why the adjuster decided against you, send evidence that responds to each point. Strong evidence usually includes:

• Photos of the damage on both cars, showing the exact point of impact. A rear bumper hit is hard to reconcile with "you cut me off" if the other car's front bumper is crushed.
• Video. Ask nearby businesses, homes and transit agencies for footage quickly. Many systems overwrite recordings within days or weeks.
• Witness contact details and short written statements, signed and dated.
• The scene layout: lane markings, signs, signal timing and sight lines.
• Your own notes written soon after the crash.

Our car accident evidence checklist lists what to gather. Send copies, not originals, and keep a dated list of what you sent.

Use the police report, and fix it if it is wrong

A police report is not binding on insurers, but adjusters often give it weight, especially when an officer issued a citation or recorded witness statements. Get a copy using how to get a police accident report.

If the report has a factual error, such as the wrong street, the wrong direction of travel or a missing witness, contact the agency that wrote it. Many agencies let you submit a supplemental statement, even if they will not change the officer's opinion. Send a copy of any supplement to the adjuster.

Draw the crash

A clear diagram can show what words cannot: lane positions, the direction of each car and the point of impact. Use the free crash diagram builder to place the vehicles, add arrows and signs, mark the impact and download an image. Attach it to your dispute letter with photos that match it.

Parking-lot crashes

Parking lots cause many 50/50 decisions because there are no lane markings, no signals, and often no police report. In some places police do not write a full report for a crash on private property, so the photos you take may be the main record.

How adjusters typically think about common parking-lot situations (this is common claims practice, not law, and it varies):

Situation	What adjusters often consider
Two cars backing out at the same time	Both drivers had a duty to look, so a split is common unless one car was already stopped.
A car backing out hits a car driving down the lane	The backing car usually carries more of the blame, unless the moving car was speeding or going the wrong way.
A car in a main through-lane vs. a car leaving a feeder lane	The car entering from the smaller lane is often expected to yield.
A door opened into a passing car	The person opening the door is usually expected to check first.
A car pulling into a space hits a parked car	The moving car is usually at fault.

What helps most in a parking lot: photos showing where each car stopped, proof that your car was stopped (dashcam footage or a witness), and store camera footage. Ask the store manager right away; some businesses release video only to police or insurers, so give the adjuster the store's name and the time.

When it is split 50/50

A 50/50 decision often means the adjuster could not tell what happened, not that both drivers were equally careless. To move it:

• Identify the single fact that decides the case (who had the green light, whose car was moving) and give evidence on that point.
• Ask whether the adjuster has seen the damage photos for both cars.
• Ask for a supervisor review in writing.

Depending on your state, a 50 percent share may cut your recovery in half or bar it completely. Check your state's rule on the state accident law pages.

Inter-company arbitration

When your insurer has paid your claim under your collision coverage and the other insurer denies liability, the two companies may settle the dispute between themselves. Many insurers belong to inter-company arbitration programs, in which a neutral arbitrator reviews both sides' evidence and decides how the cost is shared. You usually do not take part directly, but you can give your adjuster the evidence to submit. Ask your insurer whether it plans to pursue the other company and how your deductible is included.

Use your own collision coverage and recover the deductible

If you have collision coverage, you can have your own insurer fix your car now instead of waiting for the other side. The NAIC describes collision coverage as paying "for damage to your car from a collision with another car," after your deductible.

Your insurer then tries to recover what it paid from the other driver's insurer. That is called subrogation. TDI explains that your insurer "will try to recover what they paid you from the other driver's insurance," and that "if they get anything back, you might get your deductible reimbursed." If the recovery is partial, you may get only part of your deductible back.

Ask your insurer:

• Whether it is pursuing subrogation, and how long that usually takes
• Whether your deductible is included in its demand
• How a fault finding will affect your premium

If you have no collision coverage, you can still claim against the other driver directly, or check whether uninsured motorist property damage applies. See uninsured and underinsured motorist claims.

Complaints to the department of insurance

If the insurer will not explain its decision or ignores your evidence, you can file a complaint with your state's department of insurance. A complaint does not force the insurer to change its fault decision, but TDI notes that when you complain about the other driver's insurer, the company must write back explaining why it denied the claim or paid the way it did. That written answer is useful later.

Small claims court as an option

If the dispute is over vehicle damage, your deductible, rental costs or another modest amount, you can sue the other driver in small claims court. You sue the driver, not the insurer, although the insurer often steps in to defend. The judge decides fault on the evidence presented, and the insurer's earlier decision does not bind the court. California's small claims guide is a good example of how simple the process can be, but every state sets its own dollar limits and rules. Read small claims court for car accidents and check your filing deadline with the filing deadline calculator.

For injury claims, or when the amounts are large, talk to a lawyer before filing. If you are the one being sued, see what to do when you're sued after a car accident.

A short dispute plan

• ☐ Ask for the fault decision, its basis and a supervisor's name in writing
• ☐ Get the police report and request a supplement if facts are wrong
• ☐ Send photos of both cars' damage, video and witness statements
• ☐ Attach a crash diagram that matches the photos
• ☐ Ask your own insurer about collision coverage and subrogation
• ☐ File a department of insurance complaint if the insurer will not explain
• ☐ Consider small claims for vehicle damage, before the deadline

If they still won't budge

Some disputes end with the evidence you have. A written decision, a complete evidence file and your own insurer on your side give you the best chance either in negotiation or in court. If you settle any part of the claim along the way, read what to check before signing a settlement release first, and for rental and loss-of-use costs use the rental car and loss-of-use calculator.