Health insurance cost in Yellowstone County, MT (2026)

42 Marketplace plans from 3 insurance companies are sold in Yellowstone County in 2026. Here is what they cost by tier and age, what a tax credit does to the price, the cheapest plans by name, and what private plans run for healthy households.

Cheapest Bronze, age 40

$354/mo

full price, before any credit

Silver benchmark, age 40

$561/mo

the plan tax credits are based on

Plans

25 PPO · 9 POS · 8 EPO

Insurers

selling in this county

Deductibles

$250 to $10,600

individual, standard plans

Monthly premiums by tier and age

Tier	Age 21	Age 30	Age 40	Age 50	Age 60
Bronze (14 plans)	$277–$437	$314–$496	$354–$558	$494–$780	$751–$1,185
Silver (13 plans)	$431–$587	$489–$666	$551–$750	$769–$1,048	$1,169–$1,592
Gold (13 plans)	$443–$628	$502–$713	$566–$803	$791–$1,122	$1,202–$1,706

Lowest to highest monthly premium among the plans sold in Yellowstone County, before any tax credit, from the CMS 2026 plan file (snapshot August 4, 2026).

Ranges at a glance (age 40)

Blue: Marketplace tiers, full price. Green: private plan range for a healthy 40-year-old man in Montana, after the advisors' usual adjustment.

What a tax credit does in Yellowstone County

Household	% of poverty level	Estimated tax credit	Cheapest Bronze, full → after credit
A single 40-year-old earning $40,000	255%	$274/mo	$354 → $79
A family of four (parents 40 and 38, two kids) earning $85,000	264%	$1,152/mo	$1,122 → $0

2025 federal poverty guidelines apply to 2026 coverage; the enhanced credits of 2021–2025 expired, so the 400% cutoff is back (for one person that is $62,600 a year, for four $128,600). The Marketplace sets the final credit.

See your own numbers for Yellowstone County

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Cheapest Marketplace plans in Yellowstone County

Priced for a 40-year-old, full price. Every plan, with deductibles and copays, is in the tool once you enter your household.

Cheapest Bronze plans

Blue Focus Bronze POS℠ 705Blue Cross and Blue Shield of Montana · POS$354/mo at 40 · deductible $10,600 · max out-of-pocket $10,600

Blue Focus Bronze POS℠ StandardBlue Cross and Blue Shield of Montana · POS$384/mo at 40 · deductible $7,500 · max out-of-pocket $10,000

Blue Focus Bronze POS℠ 205Blue Cross and Blue Shield of Montana · POS$408/mo at 40 · deductible $3,500 · max out-of-pocket $9,950

Cheapest Silver plans

Blue Focus Silver POS℠ StandardBlue Cross and Blue Shield of Montana · POS$551/mo at 40 · deductible $6,000 · max out-of-pocket $8,900

Blue Focus Silver POS℠ 206Blue Cross and Blue Shield of Montana · POS$561/mo at 40 · deductible $3,500 · max out-of-pocket $8,900

Blue Focus Silver POS℠ 903Blue Cross and Blue Shield of Montana · POS$573/mo at 40 · deductible $7,250 · max out-of-pocket $7,250

Cheapest Gold plans

Blue Focus Gold POS℠ 207Blue Cross and Blue Shield of Montana · POS$566/mo at 40 · deductible $250 · max out-of-pocket $8,900

Blue Focus Gold POS℠ StandardBlue Cross and Blue Shield of Montana · POS$572/mo at 40 · deductible $2,000 · max out-of-pocket $8,200

Blue Focus Gold POS℠ 902Blue Cross and Blue Shield of Montana · POS$580/mo at 40 · deductible $1,000 · max out-of-pocket $8,500

Private plans in Montana

Age	Man, monthly range	Woman, monthly range
30	$72–$353	$113–$410
40	$152–$498	$136–$484
50	$298–$599	$203–$488
60	$479–$830	$298–$614

A family of four (parents 40 and 38 with two children) is typically quoted $497 to $978 a month in Montana. Private plans are not ACA plans: no tax credit, health questions on the application, and pre-existing conditions can raise the price or be excluded. Deductibles are usually lower than the cheapest Marketplace tiers and you can enroll any month of the year.

Questions people ask

What is the cheapest health insurance in Yellowstone County?

For a 40-year-old paying full price, the cheapest Marketplace plan in Yellowstone County is a Bronze plan at $354 a month (Blue Cross and Blue Shield of Montana). With a tax credit it can be far less; see the examples above. Private plans for a healthy 40-year-old man start around $152 a month.

How many health insurance companies sell Marketplace plans in Yellowstone County?

3 in 2026: Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans. Between them they offer 42 plans (25 PPO · 9 POS · 8 EPO).

Do I qualify for a tax credit in Yellowstone County?

Marketplace premium tax credits apply when household income is between 100% and 400% of the federal poverty level, which for 2026 means up to $62,600 for one person or $128,600 for a family of four. Montana expanded Medicaid, so incomes under 138% of the poverty level are usually covered there instead. Enter your income in the tool to see your estimate.

When can I enroll?

Marketplace Open Enrollment runs from November 1 to mid-January in most states, or within 60 days of a qualifying life event such as losing other coverage, moving, marriage or a new baby. Private plans can be applied for any month of the year.

Nearby counties in Montana

All Montana counties →

Sources: CMS QHP Landscape PY2026 Individual Medical (data.healthcare.gov, snapshot August 4, 2026); HHS 2025 poverty guidelines; IRS Rev. Proc. 2025-25; private ranges from the carrier rate tables our advisors quote from. Page generated 2026-09-29.