Car Insurance After an Accident That Wasn't Your Fault
"Not at fault" describes a conclusion insurers reach after they investigate, not a fact settled at the scene. The immediate question after an accident you believe another party caused is not whether you were right about fault; it is which insurance path to use to get repaired, covered, and made whole. This page owns that routing decision. Immediate post-crash steps live on our after-an-accident guide; the full claims workflow lives on our how to file a claim guide; coverage mechanics live in the coverage family; total- loss journeys live on our car-totaled guide.
What most drivers actually want to know
Do I file with my insurer or the other driver's?You can do either, and each path has trade-offs. A first-party claim with your own carrier uses your collision or UM/UIM coverage and is generally faster. A third-party claim uses the other driver's liability coverage but depends on their insurer accepting fault.1
Does the police report determine insurance fault?No. A police report is evidence insurers consider, not the fault determination itself. Each insurer conducts its own liability investigation and reaches its own conclusion, which is why two insurers can disagree even when a police report names one driver.4
Do I have to pay my deductible?If you use your own collision coverage, you pay the deductible at claim time regardless of who caused the accident. Whether you get it back depends on subrogation and how successfully your insurer recovers from the at-fault party.1
What if the other driver has no insurance?Where you carry uninsured motorist (UM) coverage, that is the path. NAIC notes 49 states and DC require liability insurance, but whether UM/UIM itself is mandatory varies by state. If you do not carry UM, the practical path is your own collision coverage plus subrogation.3
Will filing raise my rates?Not automatically. Some carriers do not surcharge a not-at-fault claim; some do under filed rate plans; some states restrict the practice by statute. There is no universal rule that filing a not-at-fault claim raises the premium.1
What if it was a hit-and-run?UM coverage typically responds where you carry it. Requirements vary by state and by carrier program, including whether the other vehicle or driver must be identified.3
YesWeSure Bottom Line
First-party is usually faster; third-party avoids the deductible if it works. A first- party claim runs through your own carrier and your own collision or UM/UIM coverage. A third-party claim runs through the other driver's liability insurer, avoids your deductible, but depends on that carrier accepting fault14.
Fault is investigated, not declared. A police report is evidence insurers consider, not the insurance fault determination. Each carrier investigates independently and applies its state's negligence rule. Two carriers can disagree on the same facts.
Subrogation is how your deductible may come back. If you file first-party and your insurer pays your claim, it can pursue the at-fault party for recovery, potentially including your deductible. Recovery can take months and full recovery is not guaranteed1.
Not every not-at-fault filing raises your rate. Some carriers do not surcharge a not-at- fault claim; some do under their filed rate plan; some states restrict the practice by statute. There is no universal rule1. Premium impact belongs on our cost hub and on our after-accident guide, not on this page.
What is different when you believe another party is at fault
Eight things that shift on a not-at-fault claim
Which insurer pays first
Your choice, subject to coverage available1
A first-party claim (your carrier, your collision or UM/UIM) is usually the faster path. A third-party claim (the other driver's liability carrier) depends on their insurer accepting fault. Both paths can co-exist during the investigation.
Fault determination
Each insurer investigates and decides4
Fault is not settled at the scene. Each insurer conducts its own liability investigation, considers evidence (statements, photos, police report, physical damage patterns), and applies its state's negligence rule. Two insurers can reach different conclusions on the same facts.
Your deductible
Applies when you use your own collision1
If you file first-party under collision, your deductible is netted from the settlement. Subrogation may return it later. If the third-party insurer accepts fault and pays directly, you may avoid the deductible entirely. Neither outcome is guaranteed upfront.
Deductible recovery
Handled by your insurer through subrogation1
Subrogation is your insurer's recovery of the amount it paid you (potentially including your deductible) from the at-fault party. The process can take months, and full recovery is not guaranteed if fault is disputed, if the at-fault driver is underinsured, or if a settlement is negotiated at a discount.
Uninsured / hit-and-run
UM coverage, where you carry it3
NAIC notes 49 states and DC require liability insurance, but whether UM/UIM itself is mandatory varies. Hit-and-run typically falls under UM where the coverage is in force; specific state and carrier rules on identifying the other vehicle apply.
Injury claims
Route varies by state and by policy2
In no-fault or PIP states, medical costs typically route through your own coverage regardless of fault. In tort states, injury claims route through the at-fault driver's bodily-injury liability coverage. Coverage mechanics live in the coverage family.
Rental and loss-of-use
Depends on which path is paying1
A first-party claim uses your own rental reimbursement endorsement (if carried). A third-party claim may include loss-of-use payable by the at-fault carrier. Rules and duration vary by policy and state.
Insurers disagree on fault
Negotiation, arbitration, or litigation4
When first-party and third-party carriers reach different fault conclusions, resolution runs through inter-carrier arbitration, appraisal (for physical damage), state DOI complaint, or, ultimately, civil litigation. There is no universal outcome.
The not-at-fault framework: five steps in order
A not-at-fault accident compresses several decisions into a short window. The five steps below sequence the routing questions that specifically matter for insurance. The rest of this page walks each step in more detail.
Step 1
Who pays first
Decide whether to file first-party (your carrier, your collision or UM/UIM coverage) or third-party (the other driver's liability carrier). First-party is typically faster and does not depend on the other carrier accepting fault; third-party avoids your deductible but depends on cooperation. Both can proceed in parallel during the investigation.1
Step 2
Fault investigation
Recognize that fault is not decided at the scene, and the police report is evidence, not the insurance fault determination. Each insurer investigates independently and applies its state's negligence rule to the facts. Some states use comparative negligence (in various forms); a small number use contributory negligence. The applicable rule matters at the recovery stage.4
Step 3
Coverage path
Confirm which coverages are available: collision under your own policy; UM or UIM if the other driver is uninsured or underinsured; comprehensive if the loss is a non-collision covered peril; PIP or medical payments for injuries where the state uses those coverages. Coverage mechanics themselves live in the coverage family.2
Step 4
Recovery and subrogation
If you filed first-party, your insurer typically pursues subrogation against the at-fault party to recover what it paid, and may recover your deductible on your behalf. Recovery takes time and is not always complete. Whether your carrier is willing to accept a partial settlement affects the deductible outcome.1
Step 5
Unresolved differences
When insurers reach different fault conclusions, or when a third-party carrier denies the claim, escalation options include inter-carrier arbitration, the appraisal clause for physical-damage disputes, a state DOI complaint, and civil litigation. Illinois DOI, for example, publishes an explicit Right of Recourse for total-loss valuation disputes.5
First-party claim vs third-party claim
The distinction between the two paths is where most of the practical decisions live.
- First-party claim. You file with your own carrier under coverages you carry (collision for physical damage; UM/UIM if the other driver is uninsured or underinsured; PIP or medical payments for injuries where applicable). Your carrier processes the claim, applies your deductible, and then, if the other party is at fault, may pursue subrogation to recover what it paid.
- Third-party claim. You file directly with the other driver's liability insurer. Texas OPIC describes the practical challenges: the other driver may not have insurance or enough insurance to pay for your damages, the other insurer represents its own insured, and the other insurer must agree its driver was at fault before it will pay4. The path avoids your deductible when it works, but depends on cooperation you do not control.
- Both can be open at once. Nothing prevents you from filing first-party while pursuing third-party in parallel during the investigation. If your carrier pays first, subrogation replaces the third-party negotiation from your perspective; your carrier becomes the recovering party.
How fault is actually determined
The point that saves the most confusion is this: fault for insurance purposes is not decided at the scene, and the police report is not the fault decision.
- Police report as evidence, not verdict. Insurers consider the police report alongside driver statements, witness statements, photos, dash-cam or surveillance video, and the physical damage patterns on both vehicles. It is influential evidence, but not the final insurance determination.
- Two insurer investigations. Your insurer investigates for your benefit; the other driver's insurer investigates for its insured's benefit. Each applies its own claims-handling practice filed with the state DOI.
- State negligence rule applies at recovery. States allocate blame differently. Comparative negligence (in pure or modified forms) allows partial recovery even where the claimant shares some fault. Contributory negligence, used in a small number of jurisdictions, can bar recovery entirely if the claimant shares any fault. This page treats these as state-variable concepts; the specific state rule belongs on our state guides, not here as a national table.
Using your own collision coverage
Collision is the first-party coverage most commonly used when you believe another party caused the accident and you need repairs quickly. Coverage mechanics live on our collision explainer; the situation-specific points here are:
- Deductible applies at claim time. Your collision deductible is netted from the settlement your insurer pays for repair or the ACV settlement on a total loss. That is true regardless of who caused the accident.
- Faster payment path. Because you have a contract with your own carrier, the timeline is typically shorter than negotiating with a third party who must first accept fault.
- Subrogation may return your deductible. After paying you, your insurer can pursue the at-fault party for the amount it paid, including your deductible. Recovery outcome depends on the strength of the evidence, the coverage the at-fault party carries, and whether your insurer accepts a partial settlement.
Deductible interaction and subrogation
Subrogation is your insurer's right to step into your shoes and pursue the at-fault party after paying you. Three practical facts worth stating explicitly:
- Your insurer handles the mechanics. You do not typically file a separate subrogation claim. Once your first-party claim is paid, the subrogation process runs in the background between insurers.
- Timeline is not fast. Recovery can take months and sometimes longer than a year. The deductible you paid up front is refunded only when (and to the extent that) the recovery succeeds.
- Partial recovery is common. If fault is disputed, the other driver's coverage is insufficient, or your insurer settles at a discount to close the file quickly, the deductible refund may be partial or, in some cases, may not arrive at all. This is why publishing a promise that not-at-fault always means no deductible would mislead.
Third-party path against the other driver's liability insurer
When you file with the other driver's liability insurer, three things follow from the structure of that claim.
- They represent their insured, not you. Texas OPIC states this explicitly: the other insurance company is on their driver's side, and the other company must agree it was their driver's fault before it pays4.
- No obligation to pay you if fault is not accepted. Until the other carrier accepts liability, it has no obligation to pay for your damages. Investigating carriers do not settle third-party claims quickly to be nice; they settle because their filed-rate analysis says settling is cheaper than litigation.
- Property-damage vs bodily-injury paths. Property-damage liability handles your vehicle repair or total loss on the third-party side. Bodily-injury liability handles your injury claim if you have injuries and the other driver is liable. Both come out of the other driver's policy limits.
Uninsured, underinsured, and hit-and-run
The third-party path only works when the other driver has insurance and enough of it. When they do not, UM/UIM is the alternative.
- Uninsured motorist (UM). Responds when the other driver had no liability insurance. NAIC notes 49 states and DC require liability insurance, but a share of drivers still drive without coverage; the national rate varies substantially by state3.
- Underinsured motorist (UIM). Responds when the at-fault driver has insurance but their limits are not enough to cover your damages. UIM stacks on top of the other driver's liability payment up to your UIM limits.
- Hit-and-run. UM coverage typically responds where the coverage is in force. Requirements for identifying the other vehicle vary by state and by carrier program; some states require a police report filed within a specific window.
- UM/UIM is not mandatory everywhere. Some states require insurers to offer UM/UIM or to include it unless the consumer waives it in writing; other states leave it optional3. If you do not carry UM/UIM, the practical path when the other driver is uninsured is your own collision coverage plus subrogation, which often produces limited recovery in practice.
Coverage mechanics for UM/UIM live on our uninsured motorist explainer.
Rental and loss-of-use at a high level
Which policy pays for your rental car depends on which path is paying for the loss.
- First-party rental reimbursement. If you carry a rental reimbursement endorsement on your policy, your carrier pays for the rental during a first-party claim, up to a daily cap and a per-claim limit set by the endorsement.
- Third-party loss-of-use. If the third-party carrier accepts fault, its liability coverage may pay for your loss-of-use, which functions like rental reimbursement paid by the other carrier. Availability and duration depend on state law and the other carrier's practice.
- Neither is unlimited. Rental coverage on either side ends on a defined schedule, whether by per-day cap, per-claim cap, or once repairs are complete or a total-loss settlement is paid. There is no universal rule that rental continues until you have bought the next car.
Injury claim routing at a high level
How injury claims route depends on the state's injury system:
- No-fault or PIP states. Medical expenses (up to policy limits) route through your own policy under Personal Injury Protection or medical payments coverage regardless of fault. Suing the at-fault driver for pain and suffering is typically limited to serious-injury or dollar thresholds.
- Tort states. Injury claims route primarily through the at-fault driver's bodily-injury liability coverage, with your PIP or medical payments as a secondary layer where applicable.
- State law controls. Whether your state is no-fault, tort, or a hybrid is a state-law question; detail lives on our state guides, not on this page.
Injury claims involving significant medical treatment, lost wages, or permanent impairment generally warrant a consultation with a licensed attorney. This page is informational and does not substitute for that advice.
When insurers disagree about fault
Two carriers investigating the same accident can reach different conclusions. When they do, the resolution paths include:
- Inter-carrier arbitration. Many insurers participate in industry arbitration forums to resolve inter-company subrogation disputes. This typically runs in the background between carriers and does not require the consumer to appear.
- Appraisal for physical-damage valuation disputes. Most policies contain an appraisal clause allowing each side to hire an appraiser, with an umpire selected to break disagreements. This is a policy-driven process for dollar-amount disputes, not fault disputes.
- State DOI complaint. State insurance departments accept consumer complaints. Illinois DOI, for example, publishes a formal Right of Recourse for total-loss valuation disputes5. Complaint processes exist in every state.
- Civil litigation. When negotiation, arbitration, and regulatory paths do not resolve the dispute, civil litigation is the final option. Consultation with a licensed attorney is appropriate where injuries, significant damage, or a clear disagreement on fault is present.
Preserving evidence and communications
Two habits materially improve outcomes on any not-at- fault claim:
- Photograph the scene. Vehicle positions before they are moved, all sides of both vehicles, damage patterns, road conditions, signage, and skid marks. Photos taken in the first minutes carry weight a description written a week later cannot.
- Save communications in writing. Ask for offers and denials in writing (email or letter). Note who you spoke with, when, and what was said. Contemporaneous notes are better than reconstructed memory when a dispute matures.
- Do not admit fault at the scene. Exchange information, cooperate with the officer if one is present, and describe what happened factually. Statements taken at the scene find their way into the investigation.
- Report to your own carrier promptly. Even if you plan to pursue a third-party path, timely reporting to your own insurer preserves your first- party options. Policies commonly require prompt notice of a loss.
What we verified for this page
- StrongNAIC framing of first-party vs third-party claims and the distinction between using your own coverage and the other driver's liability coverage, verified against NAIC A Consumer's Guide to Auto Insurance and NAIC \"What Does Auto Insurance Cover?\" consumer materials.
- StrongNAIC framing of UM/UIM coverage and state variation (forty-nine states plus DC require liability insurance; UM/UIM mandatory-vs- optional status varies by state) verified against NAIC Uninsured Motorists topic page.
- StrongTexas OPIC third-party claim framing (the other insurer represents its insured; the other insurer must agree its driver was at fault before it will pay; the other driver may lack sufficient coverage) verified against Texas Office of Public Insurance Counsel Information on Third- Party Auto Claims.
- StrongIllinois DOI dispute-resolution framework (Right of Recourse for total- loss valuation disputes under 50 Illinois Administrative Code Part 919) verified against Illinois Department of Insurance Total Loss Auto Claims consumer page.
- ModerateSubrogation and deductible-recovery framing. Carrier practice is consistent across major U.S. insurers: after paying a first- party claim, insurers pursue subrogation and may recover the deductible on the insured's behalf. Recovery timelines and completeness vary. The page does not publish a universal timeline or a guaranteed recovery rate.
- ModerateComparative vs contributory negligence as state-variable concepts. A small number of jurisdictions apply contributory negligence; most states apply comparative negligence in pure or modified forms with different thresholds. The page treats these as state-variable concepts and does not publish a 50-state matrix.
- LimitedDeliberately omitted from V1. A claim that the other driver's insurer must immediately pay; a claim that the police report determines insurance fault; a claim that not-at- fault means no deductible; a claim that the deductible is always refunded; a claim that filing first-party automatically raises premiums; a claim that every state uses the same fault rule; a claim that every state follows comparative negligence; a claim that not-at-fault claims never affect premium; a universal claim deadline; and a 50- state negligence-rule table.
- LimitedNamed author and expert reviewer. V1 attributes to “YesWeSure Editorial.” A named auto-insurance editor and a licensed expert reviewer are tracked as a pre-launch YMYL item across all reference families.
Ready to compare coverage that protects you when the other driver is at fault?
Compare car insurance quotesThis page is informational and does not constitute legal, tax, or insurance advice. Fault determination, state negligence rules, subrogation outcomes, and injury-claim routing vary by state, carrier, and specific facts. Verify specifics with your insurance carrier, your state DOI, and (particularly where injuries are involved) a licensed attorney. YesWeSure may receive compensation when readers use quote-comparison links. Compensation does not influence the statutory, regulatory, or evidentiary information on this page or the sources cited above. See our advertiser disclosure and editorial standards.
Common questions
Should I file with my insurer or the other driver's?
Both paths exist and each has trade-offs. First-party is typically faster and does not depend on the other carrier accepting fault. Third-party avoids the deductible but only works when the other insurer accepts liability4. Nothing prevents you from opening both while the investigation runs.
Does the police report decide who is at fault for insurance?
No. A police report is important evidence but not the insurance fault decision. Each insurer investigates independently and applies its state's negligence rule to the facts.
Do I have to pay my deductible if the other driver caused the accident?
If you use your own collision coverage, yes at claim time. Whether you get it back depends on subrogation outcome. If the third-party insurer accepts fault and pays your claim directly, you may avoid the deductible entirely.
What is subrogation?
Subrogation is your insurer's right to pursue the at-fault party for the amount it paid on your claim after paying you. Recovery may include your deductible. Timelines vary from months to more than a year, and full recovery is not guaranteed.
Will filing raise my rates if the other driver was at fault?
Not automatically. Some carriers do not surcharge not-at-fault claims; some do under filed rate plans; some states restrict the practice by statute. There is no universal rule. Premium framing lives on our after-accident guide and our cost hub.
What if the other driver has no insurance?
Where you carry uninsured motorist (UM), that is the path. NAIC notes 49 states and DC require liability insurance, but whether UM itself is mandatory varies by state3. Without UM, your own collision plus subrogation is the practical path.
What if it was a hit-and-run?
UM coverage typically responds where you carry it. Some states require identifying the other vehicle or filing a police report within a specific window. Verify with your carrier and state DOI.
What if the insurers can't agree on fault?
Resolution paths include inter-carrier arbitration, appraisal for physical-damage disputes, state DOI complaint, and civil litigation. Illinois DOI, for example, publishes a formal Right of Recourse for total-loss valuation disputes5. Complaint processes exist in every state.
Sources & methodology
- NAIC: A Consumer’s Guide to Auto Insurance. Framing of first-party vs third-party claim distinction, and consumer disclosure standards at underwriting. (National Association of Insurance Commissioners, TIER 1)
- NAIC: What Does Auto Insurance Cover? Consumer-facing explainer covering liability, collision, comprehensive, uninsured and underinsured motorist, and medical payments coverages. (National Association of Insurance Commissioners, TIER 1)
- NAIC: Uninsured Motorists topic page. Forty-nine states and the District of Columbia require drivers to carry auto liability insurance; New Hampshire is the only state without a compulsory liability law but has alternative financial-responsibility requirements. Whether UM/UIM is itself mandatory or optional varies by state. (National Association of Insurance Commissioners, TIER 1)
- Texas Office of Public Insurance Counsel: Information on Third-Party Auto Claims. State agency consumer guidance describing how consumers may file a claim with the other driver’s insurance company and the practical challenges (the other insurer represents its insured; the other insurer must agree its driver was at fault; the other driver may lack sufficient coverage). (Texas Office of Public Insurance Counsel, TIER 1)
- Illinois Department of Insurance: Total Loss Auto Claims (50 Illinois Administrative Code Part 919). Consumer guidance on valuation methodology, the Right of Recourse dispute process, and that advertisements are not acceptable sources of market value. (Illinois Department of Insurance, TIER 1)
- YesWeSure: Car insurance after an accident (Situation family, sibling) (YesWeSure, INTERNAL)
- YesWeSure: How to file a car insurance claim (Guide #5) (YesWeSure, INTERNAL)
- YesWeSure: What is collision coverage? (YesWeSure, INTERNAL)
- YesWeSure: What is liability coverage? (YesWeSure, INTERNAL)
- YesWeSure: What is uninsured motorist coverage? (YesWeSure, INTERNAL)
- YesWeSure: Car insurance when your car is totaled (Situation family) (YesWeSure, INTERNAL)
- YesWeSure: How much is car insurance? National cost hub (YesWeSure, INTERNAL)
- YesWeSure: Car insurance state guides (YesWeSure, INTERNAL)
- YesWeSure: What is comprehensive coverage? (YesWeSure, INTERNAL)
Evidence hierarchy on this page: Tier 1 (NAIC, Texas OPIC, Illinois DOI, state primary consumer materials). No Tier 2 or Tier 3 publisher figures appear on this page. There is no claim that the other insurer must immediately pay, no claim that the police report is the insurance fault decision, no claim that not-at-fault means no deductible, no claim that the deductible is always refunded, no claim that filing with your own insurer always raises rates, no claim that every state uses the same fault rule or the same negligence doctrine, no claim that not-at-fault always has zero premium impact, no universal claim deadline, and no 50- state negligence-rule table. State examples (Texas third-party framing, Illinois Right of Recourse) are labelled worked examples pointing to state primary sources. This page is informational and does not constitute legal, tax, or insurance advice. Last reviewed .