Montana Cliff Calculator — 2026 ACA Subsidy

By Severance Calculator Editorial · Updated

Montana Marketplace: HealthCare.gov

Montana uses a federally-facilitated marketplace (FFM) called HealthCare.gov. Montana residents enroll at HealthCare.gov.

Medicaid in Montana: Montana Medicaid (HELP Program = expansion 1115 waiver)

Montana expanded Medicaid under the ACA. Montana Medicaid (HELP Program = expansion 1115 waiver) covers adults to 138% FPL.

2026 SLCSP Benchmark Premiums (Montana)

Statewide average monthly second-lowest-cost Silver plan (SLCSP) premiums by age. Actual premiums vary by rating area.

Age2130405060
Monthly SLCSP$460$521$587$821$1,247

2026 ACA Cliff Thresholds by Household Size (Montana)

MAGI above these amounts zeros out the federal Premium Tax Credit. FPL region: contiguous48.

Household size12345
400% FPL cliff$62,600$84,600$106,600$128,600$150,600

Key Facts: Montana ACA

Montana expanded Medicaid in 2015 through the HELP Act (Healthy and Economic Lives for Montanans), signed by Governor Steve Bullock. The HELP Act was implemented as a §1115 demonstration waiver — the HELP Program — which included a premium-sharing requirement for expansion adults above 100% FPL. The Legislature renewed the expansion in 2019 through SB 280, extending it through 2025 (subsequently extended further). A work requirement provision was included but legally challenged and not fully implemented.

Montana uses HealthCare.gov (the federally facilitated marketplace, FFM) for enrollment. As healthinsurance.org confirms: 'Montana uses the federally-facilitated Marketplace, which is HealthCare.gov.' Montana has no state-based exchange and no state-funded premium subsidy backfill for 2026. Montana's SLCSP benchmark premiums are on the higher end nationally for a mid-size Western state (age 40: $587/month), reflecting lower insurer competition across the state's vast and largely rural geography.

Calculate your Montana ACA cliff

Inputs default to Montana; adjust to your household specifics. Cliff = $62,600 (HH=1) / $128,600 (HH=4).

Your situation

Member ages
self

Coverage

Income

You're under the cliff

100%138%200%300%400%

You are at 319% of the federal poverty level.

Annual PTC
$2,064
$172 / month
MAGI headroom before cliff
$12,600
until you hit 400% FPL

PTC dollar values use a state-level SLCSP estimate; verify your exact second-lowest-cost Silver plan on healthcare.gov for your zip.

Primary Sources

  1. healthinsurance.org — Montana Marketplace
    “Montana uses the federally-facilitated Marketplace, which is HealthCare.gov.”
  2. healthinsurance.org — Montana: CSR FPL threshold reference
    “you may also qualify for cost-sharing reductions (CSR) if your household income isn't more than 250% of the federal poverty level”

FAQ — Montana ACA Cliff

What is the 2026 ACA subsidy cliff in Montana?
For a household of 1, MAGI above $62,600 (400% of the 2025 FPL contiguous-48 base) zeros out the federal Premium Tax Credit under IRS Rev. Proc. 2025-25. Household of 4: $128,600. Montana has no state subsidy backfill, so crossing this threshold eliminates all premium assistance.
Did Montana expand Medicaid?
Yes — Montana expanded Medicaid in 2015 through the HELP Act (Healthy and Economic Lives for Montanans), implemented as a §1115 waiver called the HELP Program. It was renewed by the legislature in 2019. The expansion covers adults earning up to 138% FPL. Apply at dphhs.mt.gov year-round.
How do I enroll in 2026 coverage in Montana?
Montana uses HealthCare.gov (the federally facilitated marketplace) for marketplace enrollment. Open enrollment runs November 1 through January 15. Montana Medicaid (HELP Program for expansion adults) accepts applications year-round at dphhs.mt.gov for adults at or below 138% FPL.
Does Montana have a state subsidy on top of the federal PTC?
No — Montana has no state-funded premium subsidy backfill in 2026. Residents rely solely on the federal Premium Tax Credit. When the ARPA-enhanced subsidies expired at end of 2025, Montana took no state legislative action to backfill the lost assistance.
How is SLCSP calculated for Montana?
The 2026 statewide SLCSP age-band averages for Montana are: Age 21: $460/mo, Age 30: $521/mo, Age 40: $587/mo, Age 50: $821/mo, Age 60: $1,247/mo. Montana benchmark premiums are above the national average due to rural geography and limited insurer competition. The federal cliff distance (income vs. 400% FPL) is exact regardless of SLCSP precision.
Can I reduce my MAGI to stay below the 2026 cliff in Montana?
Yes — common strategies include maximizing HSA contributions, deductible IRA or SEP-IRA/Solo 401(k) contributions if self-employed, harvesting capital losses, and deferring Roth conversions. Because Montana has no state subsidy above 400% FPL, staying below the federal cliff has full dollar impact.

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