Montana Car Insurance Calculator: Cost & Coverage

• Rates on this page are from Quadrant Information Services and are updated monthly using live Montana insurer filings. Quadrant is the same data source insurance carriers use for actuarial pricing.
• All rates reflect a baseline profile: a 40-year-old driver with good credit, a clean driving record and full coverage (100/300/100 limits, $1,000 deductible) on a 2023 Toyota Camry. Your rate will differ based on your profile. The calculator above uses your Montana ZIP code and profile answers to personalize your estimate.
• Mark Fitzpatrick, a Licensed Property and Casualty Insurance Producer and MoneyGeek's resident insurance expert, reviewed the analysis on this page.
• MoneyGeek doesn't sell insurance policies or accept payments from insurers in exchange for rankings or recommendations. Rate data comes from verified state filings and independent industry sources, not directly from insurance companies.

Montana's carrier gap is $74/month for the same driver and the same coverage, but the more important relationship is how dramatically that gap shifts by credit tier. State Farm is the cheapest option for most Montana drivers at around $80/month for full coverage and stays competitive after tickets, accidents and DUIs. But for poor-credit drivers, State Farm becomes the most expensive option in the state at $698/month. Kemper prices poor-credit drivers at $206/month, a $492/month difference at the same credit tier between just two carriers.

The carrier you're with matters less than whether you're with the right carrier for your specific profile. A clean-record driver who switches from the most expensive carrier to State Farm saves $74/month. A poor-credit driver at State Farm who switches to Kemper saves nearly seven times that. Get quotes from at least three carriers and make sure one of them matches your credit tier, not just your driving record.

Montana's statewide ZIP code gap is $17/month, the smallest of the three major rate factors, but that average understates what's happening inside Billings specifically. Billings has the state's highest full coverage rates, and more than half of the statewide ZIP code gap exists within the city itself. Billings's motor vehicle theft rate is more than twice the national average, per FBI crime data, which drives up comprehensive claim exposure across every ZIP code in the city.

Rural southwest Montana, including ZIP codes near Wisdom and Dillon, sits at the opposite end of the range. If you've recently moved within Montana or updated your garaging address, re-quote. The difference between a Billings ZIP and a rural southwest ZIP is larger than the difference between minimum and full coverage in most Montana cities.

Montana full coverage averages $283/month for drivers ages 16 to 24, 2.4 times the adult rate. The birthday that produces the largest savings isn't 25. The largest single-year drop is $148/month at 17. Rates drop another $82/month at 19 and $78/month at 21. By comparison, the drop from 24 to 25 is $13/month. A driver who waits until 25 to re-shop instead of re-quoting at 17, 19 and 21 misses three of the largest pricing resets in the state.

Carrier rankings shift significantly by age. Allstate prices young drivers at $273/month on average, the most competitive non-restricted option for drivers under 25. State Farm charges $169/month for the same age group and stays the cheapest option through every senior bracket. The rate floor is $113/month at age 60. By 70 it rises to $126/month, and by 80 to $165/month. Re-shop at every threshold where rates move more than $10/month, and confirm whether the cheapest carrier for your age group has changed since your last quote.

Credit score moves Montana rates more than any other factor, and the steepest drop isn't where most drivers expect. The cliff is good to fair: that single tier change adds $110/month. The full poor-to-good spread is $242/month, 3.3 times larger than the carrier gap and 14 times larger than the ZIP code gap. Slipping from good to fair is the single most expensive credit mistake for drivers in Montana. 

The carrier that's cheapest for your credit tier also shifts. State Farm is the right call at good credit but becomes the most expensive option in the state for those with poor credit. A driver who improves from poor to good and stays with Kemper captures the credit savings but misses the carrier savings on top of it. Re-quote when your score moves into a new tier and treat it as a full carrier comparison.

After a violation in Montana, your carrier matters as much as the violation itself. An at-fault accident adds $50/month on average and a DUI adds $57/month. But those averages hide wide carrier differences. GEICO moves from one of the cheapest options for clean drivers to the most expensive after a DUI, while State Farm stays among the cheapest in both cases. A DUI driver who stays with GEICO instead of switching to State Farm pays $186/month more than necessary for the same coverage.

Montana requires an SR-22 filing after a DUI conviction, which must stay on file for 36 months from license reinstatement. For a first offense, the violation stops affecting your rate at the same point the SR-22 expires. That's your re-shop moment: month 36. Switch to a violation-friendly carrier immediately after conviction to capture savings while the clock runs, then re-quote again when the SR-22 drops off.

Dropping from full to minimum coverage saves $69/month in Montana. That's an option for older vehicles with low replacement value, but Montana is an at-fault state, which means everything above your policy limits in a crash comes out of your pocket directly. The carrier gap in Montana is $74/month, meaning that switching carriers saves more than dropping coverage and keeps your protection intact.

Drivers with an active loan don't have a choice. Lenders require comprehensive and collision until the loan is paid off. Drivers who own their vehicle outright should use the coverage calculator below to weigh that $69/month savings against what they'd actually owe in a serious crash before making the decision.

Montana ranks second in the country for wildlife collision risk, with odds of 1 in 53 per State Farm claims data from July 2024 through June 2025. The national average is 1 in 139. That difference changes the break-even calculation for dropping comprehensive coverage more than most drivers realize.

On the baseline profile vehicle, a 2012 Toyota Camry valued at approximately $7,150 per Kelley Blue Book, comprehensive and collision coverage costs $588/year in Montana. Dividing the vehicle's net value after the $1,000 deductible ($6,150) by the annual premium puts the standard payback period at about 10.5 years. Montana's 1-in-53 wildlife collision odds are 2.6 times the national average of 1-in-139, which means the actual likelihood of a comprehensive claim before that 10.5-year threshold arrives is higher here than in most states. A driver who drops comprehensive on a vehicle they plan to keep for several years is taking on more expected exposure than the same decision would carry elsewhere. If you're financing, the decision is already made. Lenders require both coverages regardless of vehicle age.

Bodily injury liability coverage pays the medical bills, lost wages and legal costs of people you injure when you’re at fault. Montana’s legal minimum is $25,000 per person and $50,000 per crash, per the Montana Commissioner of Securities and Insurance. Bodily injury liability appears in your recommendation above the minimum because Montana is an at-fault state with direct personal exposure above your policy limit. A single serious injury can exceed $25,000 quickly. The recommended amount is higher because the legal minimum is designed for compliance, not full financial protection after a serious crash.

Property damage liability coverage pays for damage you cause to other people’s vehicles and property when you’re at fault. Montana requires $20,000 per crash. On Montana’s rural roads, crashes can involve livestock, fence lines, outbuildings and heavy machinery far from urban repair services. The state minimum is often the starting point of what a rural Montana crash costs, not the ceiling. The recommended amount reflects that additional exposure.

Uninsured and underinsured motorist coverage pays your medical bills and repair costs when the driver who hit you has no insurance or not enough coverage to pay for the damage. Montana law requires both UM and UIM coverage on every policy under MCA § 33-23-201 unless you reject them in writing. Because Montana’s minimum bodily injury limit is only $25,000 per person, underinsured motorist coverage matters more often than uninsured coverage in serious crashes. Montana also allows UM/UIM stacking, which increases the coverage available across multiple vehicles on the same policy.

Collision insurance pays for damage to your own vehicle after a crash regardless of fault, while comprehensive insurance covers theft, weather damage, fire and animal strikes. Comprehensive appears in your recommendation because financed vehicles require it or because Montana ranks second nationally for wildlife collision risk at 1 in 53 odds, nearly three times the national average. Wildlife collisions are the state’s primary comprehensive claim risk, which changes the value calculation for keeping the coverage.

Gap insurance pays the difference between your vehicle’s actual cash value and the remaining loan balance if the car is totaled. It appears in your recommendation when your outstanding loan balance is likely higher than the vehicle’s market value, which is common during the first few years of financing. Montana law does not require gap insurance, but lenders and loan balances often make it financially useful.

An SR-22 is a certificate your insurer files with the Montana Motor Vehicle Division confirming that you carry active minimum coverage. It is not insurance itself. Montana requires SR-22 filings after DUI convictions, driving without insurance and certain serious traffic violations. The filing period lasts three years from your license reinstatement date, not the conviction date. If the policy lapses, your insurer files an SR-26 notice and your license can be suspended immediately.

Step 1: Compare quotes from all major Montana insurers. State Farm averages $80/month for full coverage and is the cheapest option for most standard driver profiles. But most comparison platforms don't show the full Montana market. The gap between the cheapest and most expensive insurer is $74/month, or $888/year, for the same driver and the same coverage. Get quotes from all seven major insurers before choosing a policy.

Step 2: Re-quote when your credit improves. Credit score moves Montana rates more than any other factor. Poor credit costs $360/month. Good credit costs $118/month. Once your score reaches the good tier, pull new quotes immediately. Insurers don't re-rate policies mid-term, and six of seven Montana insurers charge slightly more for excellent credit than good, so good is the target tier, not excellent.

Step 3: Pull new quotes at 17, 19 and 21. Montana's largest age-related rate drop is $148/month at 17, not 25. Rates drop another $82 at 19 and $78 at 21. Carrier rankings also shift at each threshold, so the cheapest insurer at 16 may not be cheapest at 17 or 19.

Step 4: Re-quote immediately after a DUI. A DUI changes carrier pricing more than the violation cost itself. GEICO averages $270/month after a DUI, but State Farm averages $84/month for the same driver. Staying with the wrong insurer after a DUI costs more than $2,200/year. Montana requires an SR-22 for 36 months from license reinstatement. Re-quote at conviction, not when the SR-22 requirement drops off.