Establishes provisions relating to comparative negligence or fault in certain actions for damages

HB 1540 changes how personal injury lawsuits are handled in Missouri by implementing a "comparative negligence" standard. It states that if a plaintiff is found to be 50% or more at fault for their own injury, they recover nothing. Otherwise, their damages are reduced proportionally to their share of fault, and courts must calculate fault percentages for all parties involved, including multiple defendants. The law applies to cases occurring on or after August 28, 2025.