When Both Drivers Are At Fault: Comparative Negligence & Points

In the 38 states using comparative negligence systems, insurance adjusters and law enforcement assign each driver a fault percentage totaling 100%. You might receive 40% fault for failing to signal while the other driver receives 60% for running a stop sign. Both drivers can receive citations, both can accumulate points on their DMV records, and both will see rate increases—but the surcharge magnitude tracks your specific percentage. Your state's DMV typically assigns points based on the violation cited, not your fault percentage. A failure-to-yield citation carries the same 3-4 points whether you were 20% at fault or 80% at fault. The insurance surcharge calculation differs: carriers in comparative negligence states calibrate premium increases to your assigned fault share, with 20-40% fault triggering 15-25% rate increases and 60-80% fault triggering 35-50% increases for a first at-fault accident. The other driver's insurance pays your vehicle damage and medical bills in proportion to their fault percentage under current state rules. If the other driver was 70% at fault, their liability coverage pays 70% of your repair costs. Your collision coverage pays the remaining 30% if you carry it, minus your deductible. This creates the counterintuitive outcome where you file a claim against your own collision policy even though the other driver was majority at fault.

Law enforcement officers assign violations based on traffic code violations, not insurance fault percentages. Both drivers commonly receive citations in intersection accidents, lane-change collisions, and rear-end accidents with sudden stops. The most frequent dual-citation scenarios involve failure-to-yield violations (3-4 points), improper lane change (2-3 points), and following too closely (3-4 points) assigned to different drivers for different infractions at the same accident scene. Your point accumulation follows your state's published violation schedule regardless of the other driver's citations. If you receive a failure-to-yield citation carrying 3 points and the other driver receives a traffic signal violation carrying 4 points, you accumulate 3 points on your DMV record for the 3-year lookback period most states use. The fact that the other driver also received points does not reduce your point penalty or suspension risk. States using point-count suspension thresholds treat each driver's record independently. If your state suspends licenses at 12 points in 24 months and this accident adds your eighth point, you face suspension risk from one additional violation in the next two years. The other driver's 4-point citation does not transfer to your record or affect your threshold calculation.

Preferred carriers apply tiered surcharges based on at-fault accident severity, with fault percentage determining which tier applies. A first at-fault accident at 30-49% fault typically triggers 20-30% rate increases lasting three years. The same accident at 50-100% fault triggers 35-55% increases for the same period. Carriers treat 50% fault as a full at-fault accident for surcharge purposes, even though you share responsibility equally with the other driver. The surcharge begins at your next renewal after the accident, not immediately. If your policy renews four months after the accident, you pay standard rates until that renewal date. The three-year surcharge clock starts from the accident date, not the renewal date, meaning you typically pay the surcharge for roughly 2.67 years of actual renewal cycles. Carriers in standard and non-standard markets use flatter surcharge schedules that ignore fault percentages below 100%. If you place with a non-standard carrier after accumulating multiple points from previous violations, this accident adds a standard at-fault accident surcharge regardless of your 30% fault determination. The comparative negligence calculation benefits you most when you stay with a preferred carrier that uses graduated surcharge tiers.

Preferred carriers apply underwriting rules at renewal that count at-fault accidents above specific fault thresholds. Most preferred carriers non-renew policies with one at-fault accident above 50% fault plus two moving violations in three years, or two at-fault accidents above 50% fault in three years. A 45% fault accident may not trigger the at-fault accident count for non-renewal purposes, while a 55% fault accident does. The distinction matters most for drivers already carrying points from previous violations. If you have 4 points from a speeding ticket 18 months ago and this accident assigns you 40% fault with a 3-point citation, you now carry 7 points and one partial-fault accident. Many preferred carriers will renew that combination. The same accident at 60% fault with 7 total points commonly triggers non-renewal to a standard carrier, increasing your premium 40-70% beyond the accident surcharge alone. Non-renewal notices arrive 30-60 days before your renewal date, depending on state requirements. You move to a standard or non-standard carrier at that renewal. Some standard carriers specialize in pointed-record drivers with one at-fault accident and offer rates 25-40% higher than preferred carriers rather than the 60-90% increases non-standard markets charge.

Points remain on your DMV record for three years from the violation date in most states. The at-fault accident remains on your insurance record for three to five years depending on the carrier. This creates a gap period where the DMV has removed the points but carriers still apply surcharges. If your state removes points after three years and your carrier applies accident surcharges for five years, you pay elevated premiums for two years after DMV point removal. Carriers review your motor vehicle record at each renewal. The MVR report shows violations, points, and at-fault accidents within the carrier's lookback period. Preferred carriers use three-year lookbacks for accidents; standard carriers often use five-year windows. When the accident falls outside the lookback period, the surcharge drops at that renewal. You do not need to request surcharge removal—it occurs automatically when the carrier pulls your updated MVR. The fault percentage assigned at the time of the accident remains fixed on your insurance record. If the initial investigation assigned you 60% fault and you later obtain evidence suggesting 40% fault, you must contact your insurer to request a fault reassessment before your next renewal. Carriers rarely reopen fault determinations after closing the claim unless you provide substantive new evidence like surveillance footage or witness statements not available during the initial investigation.

Request a copy of the police report and your insurer's fault determination letter within one week of the accident. The police report shows which violations each driver received; the fault determination letter shows your assigned fault percentage and explains the reasoning. If you disagree with the fault percentage, you have 30 days in most states to contest it with your insurance company before the determination becomes final for rate calculation purposes. File a claim against the other driver's liability coverage for your fault-percentage share of damages even if you carry collision coverage. If the other driver was 70% at fault and your vehicle sustained $8,000 in damage, their insurer owes you $5,600. Your collision coverage pays the remaining $2,400 minus your deductible. Filing the third-party claim preserves your ability to recover your deductible through subrogation, which your carrier pursues on your behalf. Shop standard-market carriers before your renewal if this accident moves you above your current carrier's underwriting thresholds. Drivers with one at-fault accident at 50-100% fault plus 4-6 points from previous violations pay $180-$280 per month with standard carriers versus $320-$450 per month with non-standard carriers. The 60-day period before non-renewal allows time to obtain quotes without a coverage gap.