Four systems, and Wisconsin uses the more common threshold
American fault law splits into four real categories: pure comparative negligence, modified comparative negligence with a 50% bar, modified comparative negligence with a 51% bar, and pure contributory negligence. Wisconsin uses the 51% bar under Wis. Stat. § 895.045(1) — the more typical of the two modified thresholds nationally.
Where Wisconsin genuinely departs from the pack
Having the same 51% threshold as many other states doesn't mean Wisconsin applies it the same way. Wisconsin law specifically requires that a plaintiff's negligence be measured separately against each individual defendant's negligence, rather than against a combined total of every defendant together — a structural choice that can produce real differences in multi-defendant cases, even when the underlying 51% figure looks identical on paper.
The other three systems, for context
At the more generous end, pure comparative negligence states like California never bar recovery for ordinary fault at all, no matter how high the percentage. At the far stricter end, a small handful of contributory negligence jurisdictions, like Virginia, bar recovery entirely for any fault, even 1%. See our guide to the other states using a 51% bar for Wisconsin's closest peer group nationally.
Why the comparison method genuinely matters
Because Wisconsin's per-defendant comparison can produce different outcomes against different defendants in the same case, understanding this structural feature is just as important as knowing the 51% number itself. See our full guide to how fault and liability work together in Wisconsin for what this actually looks like in practice.