State Guide Idaho

Idaho Car Accidents: what to handle first around ER discharge records, crash evidence, and timing

Clearer statewide car accidents guidance for Idaho, with a tighter focus on property-damage valuation, ER discharge records, document control, and sequence.

Reviewed January 2026 2 min read Official-source grounded Ver en Espanol En Español
Key Takeaways
  • Idaho modified comparative negligence § 6-801: "not as great as" standard; plaintiff at <50% fault = recovers (reduced by fault %); plaintiff at exactly 50% or more = ZERO recovery (50% bar); critical boundary at 49-50%. SOL: 2 years from accident date for personal injury AND property damage AND wrongful death (§ 5-219; shorter than NE's 4yr; strictly enforced). Minimum insurance: 25/50/15 ($25K/person/$50K/accident/$15K PD; $15K PD minimum lower than many states). Optional PIP § 41-2227: OFFERED but NOT mandatory (contrast KS mandatory no-fault PIP); Idaho PIP provides first-party medical + wage loss if purchased; insured can decline PIP in writing. Idaho at-fault (tort) state (NOT no-fault).
  • U.S. 95 dangers: Lewiston Hill (2,000 ft descent into Lewiston/Nez Perce County; switchbacks; loaded truck brake failures + winter ice; ITD runaway truck ramps); Panhandle north of CDA (two-lane through forests; head-on risk); Boise to McCall Payette River canyon (narrow shoulders/curves). I-84 Boise to Twin Falls: Boise metro (Ada County + Meridian/Nampa/Caldwell growth corridor = one of fastest-growing US metros) + Twin Falls Magic Valley segment (Chobani plant + dairy/potato processing = heavy truck traffic). Boise metro: I-184 Connector + I-84/US 30 interchange (Meridian) + Eagle Rd corridor + US 20/26 east Boise. Sun Valley: US 75 (Blaine County/Ketchum/Wood River Valley) + Sawtooth Mountains mountain routes.
  • Idaho at-fault (tort) state: accident victims without PIP use health insurance for medical + pursue tort claim. UM/UIM: offered but NOT mandatory in Idaho (insured can reject in writing; contrast NE mandatory UM/UIM); Idaho UM/UIM minimum 25/50. Wrongful death § 5-311: personal representative files for surviving spouse/children/heirs; damages = financial support + companionship + grief/mental anguish + medical/funeral + conscious pain before death; 2-year SOL. Idaho agricultural commercial vehicle accidents: potato processing (30% of US potato crop; Magic Valley) + dairy ($3B industry; Jerome/Gooding/Twin Falls counties) + wheat/barley + trout farming (Hagerman Valley) = CDL truck traffic on rural roads; FMCSA violations = negligence per se. Dram shop § 23-808: LIMITED to sales to MINORS only (NOT visibly intoxicated adults; narrower than NM/NE dram shop statutes).
Key Numbers — Idaho All 50 states →
Filing Deadline 2 years
Fault Rule Modified Comparative
Insurance System At-Fault
Key Statute Idaho Code § 5-219
Car Accidents guide for Idaho
Photo by Mykhailo Volkov on Pexels

Idaho car accident law is governed by modified comparative negligence under Idaho Code § 6-801 — the "not as great as" standard. Idaho bars recovery when the plaintiff's fault is 50% or more of the total fault. A plaintiff who is 49% at fault can recover 51% of proven damages from the defendant; a plaintiff who is exactly 50% at fault is barred entirely. This 50% bar rule distinguishes Idaho from Oregon and Nevada (both pure comparative fault — no bar regardless of plaintiff's percentage) but aligns with Nebraska, Kansas, and numerous other states that use modified comparative fault with the 50% threshold. The statute of limitations for personal injury claims from Idaho car accidents is 2 years from the date of the accident under Idaho Code § 5-219(4) — a 2-year period that is shorter than Nebraska's 4 years and requires prompt investigation and filing.

Idaho's most dangerous road environments combine high-speed rural driving, mountain terrain, and adverse weather. U.S. Highway 95 — the longest north-south highway in Idaho, running from the Nevada border north through Boise, Lewiston, Coeur d'Alene, and into the Idaho Panhandle — is one of the most accident-prone corridors in the state. The highway passes through dramatic terrain changes from the dry southern Snake River Plain, through the Lewiston Hill (a treacherous series of switchbacks descending 2,000 feet into the Snake River canyon), and into the wet, mountainous northern Idaho Panhandle. Interstate 84 from the Oregon border through Boise and Twin Falls to the Utah border carries significant commercial truck traffic (connected to Boise's growing metro and the agricultural processing facilities of Twin Falls and Burley). The Teton Pass area (U.S. 26/89 from Idaho Falls toward Jackson Hole, Wyoming) and the Sun Valley/Ketchum mountain corridors (U.S. 75 in Blaine County) are accident-prone mountain routes.

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