Uninsured Motorist Coverage — Idaho
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Idaho Does Not Require Uninsured Motorist Coverage
Idaho law does not mandate uninsured motorist coverage. You can legally register and drive every vehicle in your household with only the state minimum liability limits: $25,000 bodily injury per person, $50,000 per accident, and $15,000 property damage. That liability coverage pays the other driver's bills when you cause a crash. It does nothing for your own vehicles or passengers when someone without insurance hits you.
The Idaho Transportation Department reports 6.4% of drivers on Idaho roads carry no insurance. In a multi-car household, that means roughly one in sixteen drivers you encounter cannot pay your repair bills, medical costs, or lost wages if they cause a collision. Without uninsured motorist coverage on your policy, you pay those expenses yourself or pursue the at-fault driver in court—a process that rarely recovers meaningful money from someone who could not afford insurance in the first place.
“One in sixteen Idaho drivers carries no insurance, leaving your household to cover collision costs out of pocket unless you add UM coverage.”
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Idaho Uninsured Driver Rate
One in sixteen drivers on Idaho roads carries no liability insurance. A collision with an uninsured driver leaves your household covering repair and medical costs out of pocket unless you carry uninsured motorist coverage on your own policy.
Idaho Transportation Department, 2023
What Uninsured Motorist Coverage Actually Pays
Uninsured motorist bodily injury coverage pays medical bills, lost wages, and pain-and-suffering damages for you and your passengers when an at-fault driver has no insurance. Underinsured motorist coverage extends the same protection when the other driver carries liability limits too low to cover your losses. Both coverages apply per person and per accident, mirroring the structure of liability limits.
Uninsured motorist property damage coverage pays to repair or replace your vehicle after a collision with an uninsured driver. Some carriers bundle UMPD with collision coverage; others offer it as a standalone option. When your household insures multiple vehicles, UMPD applies to whichever car was hit, up to the per-accident limit you selected.
Because Idaho does not require UM coverage, your carrier must offer it when you buy or renew a policy—but you can reject it in writing. That rejection stays on file until you affirmatively add the coverage back. Many multi-car households reject UM at purchase to lower the premium, then discover the gap only after an uninsured driver totals one of their vehicles.
Rejecting UM coverage in writing means your household pays the full cost of repairs, medical bills, and lost wages when an uninsured driver causes a collision—even when fault is clear.
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Stacking and Non-Stacking UM Policies
Idaho allows stacking of uninsured motorist coverage when multiple vehicles appear on the same policy, but only if the policy explicitly permits it. Stacking means you can combine the UM limits from each insured vehicle to cover a single claim.
Most carriers in Idaho write non-stacking UM policies by default. Non-stacking means the per-person and per-accident limits apply once, regardless of how many vehicles you insure. Stacking typically raises the premium because it increases the carrier's maximum exposure. If you want stacking, you must request it at the time you add or renew coverage—rejecting UM or accepting a non-stacking policy forfeits the option until the next renewal.
Households that insure high-value vehicles or carry passengers frequently benefit more from stacking than from simply raising the base UM limit. The stacking option may cost less and deliver higher total coverage, but availability varies by carrier.
$25,000 / $50,000 / $15,000
Idaho Minimum Liability Limits
Idaho requires $25,000 bodily injury per person, $50,000 per accident, and $15,000 property damage. These minimums protect the other driver when you cause a crash but provide zero coverage for your own vehicles or passengers when an uninsured driver hits you.
Idaho Code Title 49, Chapter 12
Collision Coverage Does Not Replace UM Property Damage
Collision coverage pays to repair your vehicle after an accident regardless of fault, but it requires you to pay the deductible first—commonly $500 or $1,000. Uninsured motorist property damage coverage, by contrast, often carries a lower deductible or none at all, and it applies only when an uninsured driver is at fault. If you carry both collision and UMPD, you choose which coverage to file under after a collision with an uninsured driver.
Filing under UMPD preserves your collision coverage for future claims and may avoid a deductible, but it requires proof the other driver was uninsured and at fault. Filing under collision pays faster because fault determination is not required, but you pay the deductible and the claim may affect your renewal premium. Households with multiple vehicles often carry collision on newer cars and UMPD on all vehicles to cover the gap when an uninsured driver is involved.
Adding UM Coverage to an Existing Multi-Car Policy
If you rejected uninsured motorist coverage when you first insured your household's vehicles, you can add it back at any time by contacting your carrier and requesting the endorsement. The carrier will re-rate your policy to reflect the added coverage, and the new premium takes effect on the date the endorsement is added—not retroactively.
When you add a vehicle mid-term to an existing policy, the carrier applies the same UM limits already in place across your other vehicles unless you request a change. If your current policy carries no UM coverage because you rejected it, the newly added vehicle also goes uninsured for UM unless you affirmatively add the coverage at the time you add the car. Verify UM status every time you add a vehicle—carriers do not prompt you to reconsider a prior rejection.
How UM Coverage Works Across Multiple Vehicles
A household with three cars on one policy selects a single set of UM limits—commonly matching the liability limits, such as $25,000 per person and $50,000 per accident. If an uninsured driver rear-ends one of your vehicles and injures two passengers, the UM bodily injury coverage pays up to $25,000 per injured person and $50,000 total for that accident. The fact that you insure three vehicles does not triple the limit; the per-accident cap applies once.
Uninsured motorist property damage works the same way. If you carry $15,000 UMPD and an uninsured driver totals your vehicle, the coverage pays up to $15,000 toward repairs or replacement, minus any deductible. Adding a second or third vehicle to the policy does not increase the per-accident UMPD limit unless you affirmatively raise it. Households that own multiple vehicles often select higher UM limits to match the combined value at risk, but the choice is yours—Idaho law sets no floor.
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Get My Idaho Car Insurance QuoteFrequently Asked Questions
Does Idaho require uninsured motorist coverage?
No. Idaho does not mandate uninsured motorist coverage. Carriers must offer it when you buy or renew a policy, but you can reject it in writing. That rejection stays on file until you add the coverage back.
What happens if an uninsured driver hits my car in Idaho?
If you carry uninsured motorist property damage coverage, it pays to repair or replace your vehicle up to your policy limit. If you rejected UM coverage, you pay out of pocket or pursue the at-fault driver in court—a process that rarely recovers meaningful money.
Can I stack uninsured motorist coverage across multiple vehicles in Idaho?
Yes, if your policy explicitly permits stacking. Stacking combines the UM limits from each insured vehicle to cover a single claim. Most Idaho carriers write non-stacking policies by default; you must request stacking at purchase or renewal.
How much does uninsured motorist coverage cost in Idaho?
Cost varies by carrier, the UM limits you select, and whether the policy allows stacking. Adding UM coverage to a multi-car policy typically raises the premium, but the exact amount depends on your household's driving history and the vehicles insured.
Do I need UM coverage if I already have collision coverage?
Collision pays to repair your car regardless of fault but requires a deductible. Uninsured motorist property damage often carries a lower deductible or none and applies only when an uninsured driver is at fault. Carrying both gives you the option to choose which coverage to file under after a collision.
What is underinsured motorist coverage?
Underinsured motorist coverage pays when the at-fault driver carries liability limits too low to cover your losses. It works the same way as uninsured motorist coverage and is often sold as a combined UM/UIM endorsement.
Can I add UM coverage after I reject it?
Yes. Contact your carrier and request the endorsement. The carrier will re-rate your policy, and the new premium takes effect on the date the coverage is added. The change is not retroactive.