Cheapest Health Insurance in Montana (2026)

Montana's 2026 marketplace has three carriers: Mountain Health CO-OP, Blue Cross Blue Shield and PacificSource. That's a narrower field than most states, and limited competition is one reason rates come in above the national average. The average Silver plan for a 40-year-old cost $677 a month when we analyzed rates across all three carriers. Mountain Health CO-OP prices its plans differently as a local cooperative rather than a national carrier, and that structure produces the largest savings difference at the senior tier compared with Blue Cross Blue Shield and PacificSource.

Mountain Health CO-OP holds that price lead across nearly all profile categories we reviewed. It's the lowest-rate carrier for children, teens, young adults, adults, seniors and PPO plans. PacificSource takes the EPO category at $754 monthly and Blue Cross Blue Shield wins on Bronze-tier plans at $419 monthly. Outside those two segments, Mountain Health CO-OP's rate advantage is consistent across age groups.

The cheapest health insurance policies in Montana come from Mountain Health CO-OP. Its $639 monthly Silver rate is cheaper every carrier in our Montana analysis by $54 with Blue Cross Blue Shield and $61 with PacificSource. Choosing Mountain Health CO-OP over PacificSource saves $732 per year on premiums for a 40-year-old, per MoneyGeek's 2026 rate data.

*Average monthly rates represent the rounded mean of each provider's monthly plan rates in Montana. Average monthly savings show how much cheaper each provider is compared to the statewide average monthly rate. Your actual rates will vary based on age, location and chosen plan.

Your ideal plan varies based on age, plan type preference and metal level. You should also weigh premiums against deductibles and maximum out-of-pocket (MOOP) costs. We've organized the most affordable options by category below for most in the state.    

Your age and preferred plan type change which carrier wins for your situation. Seniors pay $1,405 monthly with Mountain Health CO-OP, which is the lowest senior rate in Montana. If your doctors are in a PacificSource network, the cooperative's EPO category at $754 monthly changes the comparison. And if your doctors require referrals for specialist visits, Blue Cross Blue Shield's POS plans at $663 monthly should be compared against Mountain Health CO-OP's PPO rate of $662.

* Rates shown are averages for silver-tier plans, using the following ages for each group: teens age 18, young adults age 26, adults age 40, seniors age 60. For plan type costs, we used average rates for 40-year-olds. 

Mountain Health CO-OP's biggest price advantage shows up at the senior tier, where its $1,405-a-month rate beats the second-cheapest senior option by a wider margin than any other age group shows. 

But Blue Cross Blue Shield has the lowest POS rate at $663 a month, and PacificSource has the lowest EPO rate at $754 a month. That distinction matters for Montana residents whose doctors participate in those specific networks rather than Mountain Health CO-OP's.

Your metal tier choice balances monthly premiums against out-of-pocket costs. Bronze plans keep monthly payments lowest but shift more cost-sharing onto you when you need care. Gold plans cost more every month but keep your expenses down at the doctor's office. Healthy residents save money with Bronze. Frequent doctor visits? Favor Gold instead.

Blue Cross Blue Shield has the cheapest Bronze plans in Montana at $419 a month. Mountain Health CO-OP has the lowest rates for both Silver plans, at $593 a month, and Gold plans, at $669 a month.

* Rates shown are the provider's average at the given metal tier for 40-year-olds.   

Blue Cross Blue Shield Bronze plans at $419 monthly carry deductibles of $7,950. A Montana resident choosing Blue Cross Blue Shield Bronze over Mountain Health CO-OP Silver saves $174 monthly in premiums but takes on $2,150 more in deductible before coverage pays. For anyone who sees a doctor more than once or twice a year, consider Silver plans.

Find the cheapest health insurance options in Montana suited to your situation:

Mountain Health CO-OP has the lowest price in Montana for a 40-year-old Silver plan at $639 a month, and it has the lowest rate in seven of nine profile categories we reviewed. Put your household income through HealthCare.gov's subsidy estimator before you compare carriers, since subsidy eligibility changes the net cost ranking and may bring Blue Cross Blue Shield or PacificSource closer in price than the base rates suggest. Get quotes from all three carriers before you enroll.

Your doctor network matters as much as the lowest rate when choosing the right carrier. Start with Mountain Health CO-OP if your primary care doctor participates in its network. It has the lowest price for nearly every age group. If you see specialists regularly and they're only in-network with PacificSource, its EPO plan at $754 a month is your starting point instead. Blue Cross Blue Shield's POS plan at $663 a month is worth comparing if you rely mainly on a single primary care doctor who manages referrals.

We gathered plan information from the federal health insurance marketplace for consumers aged 18 to 60, specifically examining costs for 18, 26, 40, 50 and 60-year-olds. The cheapest overall rankings focus on 40-year-olds' monthly premiums as this age group is most common demographically and provides clear comparison. 

Age-specific rankings use their respective premium costs. Note that cheaper monthly premiums usually mean higher deductibles and out-of-pocket maximums when you need care.