Montana · Plan year 2027 · Updated October 24, 2026
Montana health insurance for 2027
Montana residents buy marketplace coverage through HealthCare.gov (the federal marketplace). Open enrollment for 2027 runs November 1, 2026 to January 15, 2027, and a plan picked by December 15, 2026 starts January 1. Montana expanded Medicaid, so adults qualify up to $22,025 a year for one person.
| Where to enroll | HealthCare.gov |
|---|---|
| 2027 open enrollment | November 1, 2026 to January 15, 2027 |
| Last day for Jan 1 coverage | December 15, 2026 |
| Medicaid expansion | Yes |
| State coverage mandate | No |
| Average 2027 rate change | +23.3% (approved), per the state's filings |
| Short-term plans | Allowed. A 2024 federal rule limits them to 4 months in total, but federal agencies said in August 2025 they would not enforce it while they rewrite it, so state law sets the limits |
What a plan costs in Montana
In Park County, the median-priced county in Montana, the benchmark silver plan cost a 40-year-old $716 a month in 2026. Across 56 counties it ran from $561 (Carbon, Musselshell and 3 other counties) to $757 (Broadwater, Chouteau and 5 other counties). 2027 prices will be different; insurers' average change for 2027 is +23.3%.
A single 40-year-old in Park earning $39,900 (250% of the poverty line) would get about $428 a month in 2027 credit against that price. At 60 the same plan is priced near $1,521, and the credit grows to about $1,233, because the amount you're expected to pay depends on income, not age.
Medicaid and CHIP limits in Montana
Yearly income limits in 2026 dollars. Medicaid checks current monthly income, so divide by 12 for the monthly figure.
| Group | % of poverty line | 1 person | 2 | 3 | 4 |
|---|---|---|---|---|---|
| Adults without children | 138% | $22,025 | $29,863 | $37,702 | $45,540 |
| Parents | 138% | $22,025 | $29,863 | $37,702 | $45,540 |
| Pregnancy | 162% | $25,855 | $35,057 | $44,258 | $53,460 |
| Children under 1 | 148% | $23,621 | $32,027 | $40,434 | $48,840 |
| Children 1 to 5 | 148% | $23,621 | $32,027 | $40,434 | $48,840 |
| Children 6 to 18 | 148% | $23,621 | $32,027 | $40,434 | $48,840 |
| CHIP | 266% | $42,454 | $57,562 | $72,671 | $87,780 |
Extra help from Montana
- Montana Reinsurance Program (Section 1332 waiver, SB 125). Not a consumer subsidy; it lowers individual-market premiums for everyone. (source)
Benchmark and lowest prices by county
Monthly premiums for one 40-year-old non-smoker, before any credit, plan year 2026. Your credit is figured from the benchmark (second-lowest-cost silver) column. Multiply by 2.12 for a 60-year-old and 0.78 for a 21-year-old.
| County | Benchmark silver | Lowest bronze | Lowest silver | Lowest gold | Insurers |
|---|---|---|---|---|---|
| Beaverhead | $716 | $505 | $708 | $745 | 3 |
| Big Horn | $716 | $505 | $708 | $745 | 3 |
| Blaine | $716 | $505 | $708 | $745 | 3 |
| Broadwater | $757 | $505 | $748 | $745 | 3 |
| Carbon | $561 | $354 | $551 | $566 | 3 |
| Carter | $716 | $505 | $708 | $745 | 3 |
| Cascade | $748 | $479 | $739 | $745 | 3 |
| Chouteau | $757 | $505 | $748 | $745 | 3 |
| Custer | $716 | $505 | $708 | $745 | 3 |
| Daniels | $716 | $505 | $708 | $745 | 3 |
| Dawson | $716 | $505 | $708 | $745 | 3 |
| Deer Lodge | $757 | $505 | $748 | $745 | 3 |
| Fallon | $716 | $505 | $708 | $745 | 3 |
| Fergus | $716 | $505 | $708 | $745 | 3 |
| Flathead | $671 | $424 | $656 | $681 | 3 |
| Gallatin | $748 | $479 | $739 | $745 | 3 |
| Garfield | $716 | $505 | $708 | $745 | 3 |
| Glacier | $716 | $505 | $708 | $745 | 3 |
| Golden Valley | $716 | $505 | $708 | $745 | 3 |
| Granite | $716 | $505 | $708 | $745 | 3 |
| Hill | $716 | $505 | $708 | $745 | 3 |
| Jefferson | $757 | $505 | $748 | $745 | 3 |
| Judith Basin | $757 | $505 | $748 | $745 | 3 |
| Lake | $671 | $424 | $656 | $681 | 3 |
| Lewis and Clark | $748 | $479 | $739 | $745 | 3 |
| Liberty | $716 | $505 | $708 | $745 | 3 |
| Lincoln | $716 | $505 | $708 | $745 | 3 |
| Madison | $716 | $505 | $708 | $745 | 3 |
| McCone | $716 | $505 | $708 | $745 | 3 |
| Meagher | $716 | $505 | $708 | $745 | 3 |
| Mineral | $716 | $505 | $708 | $745 | 3 |
| Missoula | $671 | $424 | $656 | $681 | 3 |
| Musselshell | $561 | $354 | $551 | $566 | 3 |
| Park | $716 | $505 | $708 | $745 | 3 |
| Petroleum | $716 | $505 | $708 | $745 | 3 |
| Phillips | $716 | $505 | $708 | $745 | 3 |
| Pondera | $716 | $505 | $708 | $745 | 3 |
| Powder River | $716 | $505 | $708 | $745 | 3 |
| Powell | $716 | $505 | $708 | $745 | 3 |
| Prairie | $716 | $505 | $708 | $745 | 3 |
| Ravalli | $716 | $505 | $708 | $745 | 3 |
| Richland | $716 | $505 | $708 | $745 | 3 |
| Roosevelt | $716 | $505 | $708 | $745 | 3 |
| Rosebud | $716 | $505 | $708 | $745 | 3 |
| Sanders | $716 | $505 | $708 | $745 | 3 |
| Sheridan | $716 | $505 | $708 | $745 | 3 |
| Silver Bow | $757 | $505 | $748 | $745 | 3 |
| Stillwater | $561 | $354 | $551 | $566 | 3 |
| Sweet Grass | $561 | $354 | $551 | $566 | 3 |
| Teton | $757 | $505 | $748 | $745 | 3 |
| Toole | $716 | $505 | $708 | $745 | 3 |
| Treasure | $716 | $505 | $708 | $745 | 3 |
| Valley | $716 | $505 | $708 | $745 | 3 |
| Wheatland | $716 | $505 | $708 | $745 | 3 |
| Wibaux | $716 | $505 | $708 | $745 | 3 |
| Yellowstone | $561 | $354 | $551 | $566 | 3 |
Get a reminder before Montana's deadline
Email onlySources: HealthCare.gov and CMS state marketplace list (exchange and dates); MACPAC MACStats, February 2026, and state Medicaid agencies (limits); HHS 2026 poverty guidelines; CMS individual market plan file on data.healthcare.gov, plan year 2026; IRS Rev. Proc. 2026-26. All checked October 24, 2026. Methods.
Questions people ask
When is open enrollment in Montana for 2027?
HealthCare.gov opens November 1, 2026 and closes January 15, 2027. Pick a plan by December 15, 2026 for coverage that starts January 1.
What is the Medicaid income limit in Montana?
Montana expanded Medicaid, so adults 19 to 64 qualify up to 138% of the poverty line: $22,025 a year for one person in 2026, checked against monthly income.