Comparative negligence rules in Wisconsin

If another driver caused your crash but you also did something wrong, Wisconsin still lets you recover money, up to a point. The rule that decides how much you collect, and whether you collect anything at all, is comparative negligence. It lives in Wis. Stat. § 895.045,¹ and the mechanics are specific enough that a small change in your assigned fault can swing thousands of dollars or end a claim outright.

The 51% bar: you recover unless you were more at fault

Wisconsin follows a modified comparative negligence rule. Your own fault does not block your claim "if that negligence was not greater than the negligence of the person against whom recovery is sought."¹ In plain terms, you can recover as long as you are 50% or less at fault. Reach 51% and you recover nothing.

The 50/50 split is the line worth understanding. Because the statute bars you only when your fault is greater than the other driver's, a case a jury splits exactly evenly still pays. At 50/50 you collect half your damages. Nudge that to 51% and the claim is gone. That is why the fault percentage is the single most contested number in most Wisconsin crash cases.

When you do recover, "any damages allowed shall be diminished in the proportion to the amount of negligence attributed to the person recovering."¹ The math is direct. On $100,000 of damages, a jury that finds you 20% at fault leaves you $80,000. At 40%, you get $60,000. At 50%, $50,000. At 51%, zero.

This "not greater than" standard has been Wisconsin law since a 1971 amendment.² The earlier version of the statute could bar a plaintiff at a lower share of fault.

Your fault is compared to each driver separately

Here is where Wisconsin departs from what most people expect. In a crash with more than one other at-fault party, the statute says "the negligence of the plaintiff shall be measured separately against the negligence of each person found to be causally negligent."¹ That is the individual comparison rule. Your fault is stacked against each defendant one at a time, not against all of them added together.

The result can feel backward. In Delvaux v. Vanden Langenberg, the plaintiff was found 45% at fault while two defendants came in at 20% and 35%. Added up, the defendants were 55% at fault, more than the plaintiff. Under a combined rule he would have recovered. Because he was more at fault than each defendant taken individually, the Wisconsin Supreme Court held he recovered nothing.³

So in a three-car pileup you can be blocked from collecting against the driver who was only slightly at fault while still recovering against the driver who was mostly to blame. Each comparison stands on its own.

Joint and several liability and the second 51% line

A different 51% threshold controls collectability once you clear the bar to recover. Under § 895.045(1), a defendant whose share of fault is less than 51% is liable only for that defendant's own percentage. A defendant at 51% or more is jointly and severally liable for the whole award.¹

That difference decides whether an uninsured defendant sinks your recovery. Say one driver is 60% at fault and well insured, a second is 30% and uninsured, and you are 10%. You recover 90% of your damages, and because the first driver crossed 51%, that driver is on the hook for the entire 90%, so you can collect it all from that insurer even though the second driver cannot pay. Now change the split so the two drivers are 45% each. Neither passed 51%, so each owes only its own share, and the uninsured driver's 45% becomes money you cannot collect from anyone. Wisconsin narrowed joint and several liability this way in a 1995 tort reform act.²

One exception overrides the percentages. Under § 895.045(2), if two or more parties act "in accordance with a common scheme or plan," they are jointly and severally liable for all the damage regardless of individual shares.⁴ Two drivers illegally racing are the standard example. Both can be made to pay the full loss even if only one car struck you.

How the percentages actually get decided

The insurer does not have the last word on fault, though it will push its own number hard in negotiations. If a case goes to trial, the jury assigns each party a percentage on a special verdict, and the shares of everyone found causally negligent add up to 100%. Adjusters anchor their offers to what they think a jury would do, then apply your percentage as a discount. Expect the other side to argue your share is higher than it is, because every point they add comes straight out of your recovery and enough points end it.

Since fault is contested, the evidence gathered early tends to set the percentage. The police crash report and any independent witnesses carry the most weight. Wisconsin crash reports come from the state DOT, and you can get yours through the Wisconsin crash reports page. If your car is worth less on the market even after a clean repair, that is a separate diminished value claim, and your comparative fault reduces it the same way it reduces everything else.

The seatbelt reduction is separate and capped at 15%

Wisconsin treats not wearing a seatbelt differently from ordinary comparative fault. Evidence that you were unbelted is admissible, but by statute "such a failure shall not reduce the recovery for those injuries or damages by more than 15 percent."⁵ The same law adds that seatbelt nonuse "does not affect the determination of causal negligence in the action."⁵ So the 15% is a separate reduction on the harm caused by being unbelted, and it does not get folded into the crash fault percentages the jury assigns. A defendant cannot use your unbuckled belt to push your crash fault over the 51% cliff.

Deadlines and coverage that interact with fault

None of this helps if you file too late. Wisconsin gives you three years from the crash to bring a personal injury claim under Wis. Stat. § 893.54(1m)(a),⁶ and three years for vehicle property damage from a motor vehicle accident under § 893.52(2).⁷ Miss the deadline and the fault split never gets argued.

Coverage caps what a fault-reduced award is actually worth. Wisconsin's minimum liability limits are 25/50/10, meaning $25,000 per person, $50,000 per accident, and $10,000 for property damage.⁸ Wisconsin is an at-fault state,⁹ so the at-fault driver's insurer pays subject to your comparative share. When the reduced award tops that driver's limits, your own uninsured and underinsured motorist coverage is where the rest has to come from.

Comparative fault reduces compensatory damages, but it does not touch punitive damages the same way. If the other driver acted maliciously or in intentional disregard of your rights, a drunk driver being the common case, Wisconsin allows punitive damages capped at the greater of $200,000 or twice the compensatory award under § 895.043(6).¹⁰

The most valuable thing you can do after a Wisconsin crash is hold down how much fault gets pinned on you, because the statute turns every percentage point into dollars and, past 50%, into a total loss of the claim. A lawyer who handles Wisconsin auto cases can challenge an inflated fault number and press the individual comparison rules in a multi-car case. You can find one through the legal directory.

This is general information, not legal advice.

Sources

1. Wisconsin Legislature, Wis. Stat. § 895.045, Contributory negligence. https://docs.legis.wisconsin.gov/statutes/statutes/895/i/045?view=section

2. Wisconsin Legislature, Wis. Stat. § 895.045, legislative history note (1971 c. 47; 1995 a. 17). https://docs.legis.wisconsin.gov/document/statutes/895.045

3. Delvaux v. Vanden Langenberg, 130 Wis. 2d 464, 387 N.W.2d 751 (1986). https://www.courtlistener.com/c/wis-2d/130/464/

4. Wisconsin Legislature, Wis. Stat. § 895.045(2), Concerted action. https://docs.legis.wisconsin.gov/statutes/statutes/895/i/045/2

5. Wisconsin Legislature, Wis. Stat. § 347.48(2m)(g), Safety belts and child safety restraint systems. https://docs.legis.wisconsin.gov/statutes/statutes/347/III/48

6. Wisconsin Legislature, Wis. Stat. § 893.54, Injury to the person. https://docs.legis.wisconsin.gov/statutes/statutes/893/v/54?view=section

7. Wisconsin Legislature, Wis. Stat. § 893.52, Action for damages for injury to property. https://docs.legis.wisconsin.gov/statutes/statutes/893/v/52?view=section

8. Wisconsin Legislature, Wis. Stat. § 344.33(2), Security required. https://docs.legis.wisconsin.gov/statutes/statutes/344/iii/33?view=section

9. Wisconsin Legislature, Wis. Stat. § 344.62, Financial responsibility. https://docs.legis.wisconsin.gov/document/statutes/344.62

10. Wisconsin Legislature, Wis. Stat. § 895.043(6), Punitive damages. https://docs.legis.wisconsin.gov/document/statutes/895.043