Montana Personal Lines Law & Coverage Rules
This chapter covers the Montana-specific personal lines rules that sit on top of the shared national property & casualty fundamentals: who regulates insurance in Montana, the minimum auto liability limits drivers must carry, the state's at-fault (tort) system, uninsured/underinsured motorist coverage, and the notice rules that govern cancellation and nonrenewal. The coverage figures below were checked against the Montana Code Annotated this session; always confirm current numbers with the Commissioner of Securities and Insurance before advising a client.
The Montana Commissioner of Securities and Insurance (CSI)
Insurance in Montana is regulated at the state level by the Commissioner of Securities and Insurance, housed in the Office of the Montana State Auditor (CSI). The CSI licenses producers, approves policy forms and rates, investigates complaints, serves as consumer advocate, and enforces the state insurance code. There is no federal insurance department — knowing that Montana's own regulator, not a bank or a federal body, oversees personal lines is a common exam point. Official site: https://csimt.gov/.
Minimum Auto Liability Limits (25/50/20)
To satisfy Montana's financial-responsibility law, a personal auto policy must carry at least $25,000 bodily injury per person, $50,000 bodily injury per accident, and $20,000 property damage (written 25/50/20). Note the $20,000 property-damage figure — it differs from the $25,000 used by some neighboring states. These are minimums; producers should explain that higher limits better protect the insured's assets. Source: Mont. Code Ann. 61-6-103; verify the current figures with the Montana Commissioner of Securities and Insurance.
At-Fault (Tort) System and UM/UIM
Montana is a traditional at-fault (tort) state: the driver who causes a crash is liable for the other party's injuries and property damage, so liability limits carry real weight. It is not a no-fault/PIP state. Insurers generally must make uninsured/underinsured motorist coverage available, which the insured may accept or reject — usually with a signed election. UM/UIM matters in an at-fault state because it fills the gap when the responsible driver is uninsured or underinsured.
Cancellation and Nonrenewal Notice
State law limits the reasons an insurer may cancel a personal auto or homeowners policy mid-term (for example nonpayment of premium or material misrepresentation) and requires advance written notice of cancellation or nonrenewal to the insured. The exact number of days depends on the reason and the line of business; do not memorize a single number — verify the current Montana notice periods directly with the Commissioner of Securities and Insurance.