Idaho sets its own floor for how much liability insurance a driver has to carry, and that number is a lot lower than what a serious crash actually costs. Here's exactly what the state requires, how you prove you have it, what happens if you don't, and where the minimum leaves you exposed.
What Idaho's 25/50/15 numbers mean
Idaho Code defines "proof of financial responsibility" as at least $25,000 in bodily injury or death coverage per person, $50,000 per accident when more than one person is hurt, and $15,000 in property damage coverage.1 Idaho Code 49-1212 and 49-1229 both point back to that same 49-117 figure as the floor for every liability policy written on a vehicle registered in the state.23 Nothing in the statute distinguishes trucks from sedans, or long-time residents from someone who just moved to Boise: the 25/50/15 floor applies to any private passenger vehicle operated on Idaho roads.3
Who has to carry it, and how you can satisfy it without an insurer
Idaho Code 49-1229 requires every owner of a vehicle registered and operated in the state to continuously carry that liability coverage, and it holds anyone driving with the owner's permission to the same standard.3 The law allows two ways around a traditional policy. You can post an indemnity bond with the Department of Insurance guaranteeing at least $50,000 per accident, of which $15,000 must cover property damage, or up to $120,000 if you're bonding five or more vehicles.3 Or you can apply for a certificate of self-insurance issued directly by the department.3 Both routes are uncommon in practice, but they're the only legal substitutes for a policy, and skipping all three isn't an option once a vehicle is registered and on the road.
Carrying proof, and what it costs you to skip it
Idaho Code 49-1232 requires the driver to have proof of liability insurance in the vehicle any time it's on the road, and the state accepts a phone screen just as readily as a paper card: acceptable formats include "display of electronic images on a cellular phone or any other type of portable electronic device."4 A first violation is an infraction with a flat $75 fine.4 A second conviction within five years is a misdemeanor, punishable by a fine of up to $1,000, up to six months in county jail, or both, and your license stays suspended until you provide proof of coverage.4 Showing a policy that was actually in force at the time of the stop is a complete defense to the citation, even if you didn't have the card on you that day.4
Uninsured and underinsured motorist coverage comes standard
Idaho requires insurers to build uninsured motorist (UM) and underinsured motorist (UIM) bodily injury coverage into every auto policy they issue, and in practice those limits usually mirror whatever bodily injury liability limits you bought.56 You can turn either one down, but only by signing a written rejection or an electronic record under the state's electronic transactions act; telling your agent over the phone doesn't count.5 Insurers also have to give you a state disclosure form explaining the coverage before you can waive it.6 Given how many Idaho drivers carry only the 25/50/15 minimum, UM/UIM is often the only thing standing between an injured driver and an unrecoverable gap after being hit by someone who's underinsured themselves.
No mandatory medical payments or PIP
Idaho is a tort state, not a no-fault state, so the legislature never built a personal injury protection (PIP) mandate into the code. Medical payments coverage, the closest equivalent, is sold strictly as an optional add-on with no state-set claim deadline or minimum benefit.7 If you want your own policy to pay medical bills up front while a liability claim against the other driver plays out, you have to buy that coverage separately. The state won't require an insurer to offer it, let alone include it by default.7
Why the state floor is often not enough
Idaho's comparative negligence law bars you from recovering once your share of the fault equals or exceeds the other driver's, which in practice is the modified 50 percent rule insurance adjusters cite.8 But for everyone below that line, the size of the at-fault driver's policy is what actually determines the recovery. A serious injury claim can blow past a $25,000 per-person limit fast, and a multi-vehicle pileup on an icy highway can blow past $50,000 even faster. Idaho also lets injured people seek noneconomic damages (pain and suffering) up to $538,425.04 as of July 1, 2026, a figure the Industrial Commission recalculates every July 1 to track wage inflation under Idaho Code 6-1603.910 None of that money is available if the driver who hit you carries only the state minimum and has no assets behind it. It's a real reason to carry UM/UIM limits above 25/50 on your own policy, and to consider an umbrella policy if you own a home, regardless of what the statutory floor requires. The $15,000 property damage limit is worth a second look too: it covers a lot less of a modern vehicle than it did when the number was set, which is part of why a totaled or hard-hit car so often carries diminished value beyond what a repair shop's invoice shows.
After a crash, confirm what you're actually dealing with
The official report from the responding agency shows which insurer covered the other driver and at what liability limits, information worth having before you accept any settlement number. You can order Idaho's official crash report here. If your vehicle was damaged and its resale value took a hit even after repairs, that's a separate claim from the liability payout; our Idaho diminished value guide walks through how that works. And if the numbers don't add up between what you're owed and what the other driver's minimum policy can pay, an attorney who handles these cases daily can tell you quickly whether there's a path to more, including through your own UM/UIM coverage. You can find one through our legal directory.
This is general information, not legal advice.
Sources
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Idaho Code 49-117(20), https://legislature.idaho.gov/statutesrules/idstat/title49/t49ch1/sect49-117/
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Idaho Code 49-1212, https://legislature.idaho.gov/statutesrules/idstat/title49/t49ch12/sect49-1212/
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Idaho Code 49-1229, https://legislature.idaho.gov/statutesrules/idstat/title49/t49ch12/sect49-1229/
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Idaho Code 49-1232, https://legislature.idaho.gov/statutesrules/idstat/title49/t49ch12/sect49-1232/
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Idaho Code 41-2502, https://legislature.idaho.gov/statutesrules/idstat/title41/t41ch25/sect41-2502/
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Idaho Department of Insurance, Required Auto Coverage, https://doi.idaho.gov/consumers/auto-insurance/required-auto-coverage/
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Idaho Department of Insurance, Optional Auto Coverages, https://doi.idaho.gov/consumers/auto-insurance/optional-auto-coverages/
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Idaho Code 6-801, https://legislature.idaho.gov/statutesrules/idstat/title6/t6ch8/sect6-801/
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Idaho Code 6-1603, https://legislature.idaho.gov/statutesrules/idstat/title6/t6ch16/sect6-1603/
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Idaho Industrial Commission, Non-economic Damages Cap Calculation, https://iic.idaho.gov/wp-content/uploads/2026/06/Benefits-Non-economic-caps-effective-07_01_26.pdf