Montana has a progressive income tax with 2 brackets: 4.7% on the first $47,500 of taxable income and 5.65% on income above $47,500. At $100K income, you pay $4,289 state tax (4.29% effective rate) — moderate among Mountain West states and significantly offset by Montana's unique advantage: NO SALES TAX (one of only 5 states, along with Alaska, Delaware, New Hampshire, Oregon).
Major 2024 tax reform - consolidating to 2 brackets: Montana moved to a simplified 2-bracket structure (Senate Bill 399 of 2021 and Senate Bill 121 of 2023 cut the top rate from 6.75% to 5.9% for 2024), and House Bill 337 (2025) lowered the top rate to 5.65% for 2026. The legislature's goal was to significantly cut taxes for most earners and compete with neighboring Wyoming (0%), Idaho (5.3% flat), and South Dakota (0%) for California/Washington residents seeking Big Sky Country lifestyle.
How it compares:
The tradeoff - NO SALES TAX offsets income tax: Montana's income tax generates significant state revenue, but the NO SALES TAX policy shifts burden from consumption to income. At $100K income + $40K annual spending: MT pays $4,289 income + $0 sales = $4,289 total (4.3%). Idaho (6% sales + 5.3% income): $4,185 income + $2,400 sales (6% × $40K) = $6,585 total (6.6%). Colorado (4.4% income + 2.9% sales): $3,692 income + $1,160 sales = $4,852 total (4.9%). Result: Montana's total burden (4.3%) is LOWER than both Idaho (6.6%) and Colorado (4.9%), making it more competitive than raw income tax rates suggest.
The California/Washington question - Bozeman/Missoula as Zoom town havens: Montana's competitive tax structure attracts remote workers from high-tax coastal states. At $150K tech salary: CA vs MT $7,114 (4.74% effective) = MT saves substantially. WA (0% income tax but 10.4% sales in Seattle): $0 income + $4,160 sales (10.4% × $40K) = $4,160 total vs MT $7,114 income + $0 sales = MT costs $2,954 more/year vs WA. Trade-offs: Bozeman housing $725K (expensive, up from $380K 2019 = +91% in 7 years due to California migration), MT wages 15-25% lower than coastal (offset by no sales tax + outdoor lifestyle), Yellowstone access (1 hr Bozeman), world-class skiing (Big Sky, Whitefish), hunting/fishing culture. Estimated 15K Californians moved to MT (2010-2020), driving Bozeman/Missoula/Kalispell booms.
Source: Montana Department of Revenue - Individual Income Tax
Note: These are marginal rates — you only pay the higher rate on income within each bracket.
Source: Montana Department of Revenue
Here's what Montana residents actually pay at different income levels (2026, single filer, standard deduction):
| Annual Income | Federal Tax | State Tax | Total Tax | Take-Home Pay | Effective Rate |
|---|---|---|---|---|---|
| $50,000 | $3,820 | $1,593 | $5,413 | $44,587 | 10.8% |
| $75,000 | $7,670 | $2,877 | $10,547 | $64,453 | 14.1% |
| $100,000 | $13,170 | $4,289 | $17,459 | $82,541 | 17.5% |
| $150,000 | $24,734 | $7,114 | $31,848 | $118,152 | 21.2% |
| $250,000 | $51,304 | $12,764 | $64,068 | $185,932 | 25.6% |
Note: Includes federal and state income tax only. Does not include FICA (Social Security/Medicare), which adds 7.65% for employees.
Key takeaway: At $100K, Montana takes $4,289 in state tax alone.
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Migration Trends: According to U.S. Census Bureau data (2021-2022), Montana experienced net immigration of 7,342 residents (2nd-highest % nationally behind Idaho), continuing explosive growth (+9.6% 2010-2020, 4th-fastest US). Top origin states were:
Outflow: Montana lost residents to:
Why people move to Montana:
Why people leave Montana:
Tax considerations if moving here:
| State | Tax Rate | Tax on $100K Income | Difference from Montana |
|---|---|---|---|
| Montana | 4.7-5.65% | $4,289 | Baseline |
| Wyoming | 0% | $0 | -$4,289 (save) |
| Idaho | 5.3% flat | $4,185 | -$104 (save) |
| North Dakota | 0-2.5% | $653 | -$3,636 (save) |
| South Dakota | 0% | $0 | -$4,289 (save) |
Key insight: Montana's 4.7-5.65% progressive tax is moderate among neighboring states after the 2024 reform. At $100K income, MT ($4,289) is $104 MORE than Idaho ($4,185 at 5.3% above its zero-rate bracket), $3,636 more than North Dakota ($653 at 0-2.5%), and $4,289 more than Wyoming/South Dakota (0%). Montana's NO SALES TAX dramatically changes total burden comparisons.
Total tax burden at $100K income + $40K annual spending:
Result: Montana (8.7% total) is still clearly CHEAPER than Idaho (10.5%) — Montana's income tax is slightly higher than Idaho's at $100K ($4,289 vs $4,185), but the no-sales-tax advantage more than offsets it. Wyoming (5.6%) remains the cheapest overall due to 0% income tax and a genuinely low property tax rate. South Dakota's advantage has narrowed substantially now that its property tax is corrected (1.00%, the highest of these five states) — at 9.1% it's no longer 'dramatically cheaper,' landing close to Montana and North Dakota despite its 0% income tax. Montana's sweet spot: for high-spending households ($80K+ annual spending), NO SALES TAX saves $4,800+/year vs ID/ND, making total burden highly competitive.
Montana has a 2-bracket progressive income tax for 2026: 4.7% on the first $47,500 of taxable income and 5.65% on income above $47,500. This structure reflects Montana's two-bracket system, with the 2026 rates (4.7% and 5.65%) set by House Bill 337 (2025). At $100K income, you pay $4,289 state tax (4.29% effective rate), making Montana competitive with neighboring Idaho (5.3% flat, $4,185) and Utah (4.45% flat, $4,450).
Montana is one of only 5 states with NO SALES TAX (Alaska, Delaware, Montana, New Hampshire, Oregon), relying instead on income tax (4.7-5.65% progressive), property tax (0.61% avg), and natural resource severance taxes (coal, oil, gas, timber). For high-spending households, this is a major advantage. At $100K income + $40K annual spending: MT pays $4,289 income + $0 sales = $4,289 total (4.3% burden). Idaho (6% sales + 5.3% income): $4,185 income + $2,400 sales = $6,585 total (6.6%). Result: NO SALES TAX saves $2,400/year, making Montana's total burden much lower than Idaho's despite similar income tax rates. Wyoming (0%) and South Dakota (0%) still beat Montana on income tax alone.
At $120K remote salary: Montana ~$5,419 tax (4.52% effective) + $0 sales = $5,419 total. Wyoming $0 income + $1,750 sales (4.38% × $40K) = $1,750 total (WY saves $3,669/year vs MT). Idaho ~$5,245 income (4.37% effective) + $2,400 sales (6%) = $7,645 total (MT saves $2,226/year vs ID). Analysis: Wyoming WINS overall (save $3,669/year vs MT), but Bozeman/Missoula offer better amenities (universities, restaurants, culture) than Cheyenne/Casper. Idaho Boise is similar cost to Montana but worse lifestyle (more crowded, less public land). Montana best for: high spenders ($80K+/year = $4,800+ sales tax savings), outdoor enthusiasts (Yellowstone 1hr, Glacier 3hrs), remote workers prioritizing lifestyle over tax optimization.
Montana taxes Social Security to the extent it is federally taxable: it starts from federal adjusted gross income and the Form 2 instructions list no separate Social Security subtraction. Taxpayers 65 and older get a $5,660 subtraction per person (2025 amount; $11,320 if both spouses qualify). Military retirement pay: working military retirees can subtract the lesser of 50% of their military retirement income or their Montana-source earned income; other military retirement pay is taxed at 4.7-5.65%. Pensions, 401k, IRA: FULLY TAXED at progressive rates (4.7-5.65%). This makes MT moderately attractive for retirees - better than states taxing SS fully, worse than FL/TX/WY (0% income tax).
Bozeman housing exploded from $380K (2019) to $725K (2026) = +91% in 7 years due to: California migration (8,240 CA to MT annually, Bay Area equity buyers pay cash), Zoom town boom (remote workers keep coastal $150K+ salaries, relocate for Yellowstone/Big Sky), limited supply (Bozeman 53K population, constrained by mountains, slow permitting), lifestyle demand (world-class skiing 1hr, Yellowstone 1hr, fly fishing, hunting). Missoula ($520K, +63%) and Kalispell ($485K, +58%) cheaper alternatives. Montana wages ($66K median) can't afford Bozeman ($725K = need $145K income for mortgage), creating dual economy: wealthy remote workers vs. struggling locals.
Yes, IF you keep Bay Area salary ($150K+) and prioritize outdoor lifestyle over urban amenities + career networking. At $180K remote salary: CA tax (high effective rate) + $9,000 sales (9% × $100K spending) = significant total. MT ~$8,809 tax (4.89% effective on $180K) + $0 sales (NO SALES TAX) = $8,809 total — substantially less than CA. MT saves $10,000+/year vs CA + $725K Bozeman vs $1.5M Bay Area = save $775K upfront (offsets 75 years of $10,350 annual tax savings). Trade-offs: Bozeman feels small (53K, limited restaurants/culture/diversity), harsh winters (-10°F January, 6+ months cold), career stagnation (no tech networking/job hopping, salary frozen at remote level), culture clash (conservative MT vs liberal CA). WINS for: outdoor obsessives (ski/hike/fish daily), families prioritizing safety/space (low crime, big yards, excellent schools in wealthy suburbs), early retirees (stretch savings 40%+ longer with lower cost). LOSES for: career climbers (Bay Area salary growth 30-50% over 5 years vs Bozeman stagnant), urban lifestyle lovers (SF restaurants/culture > Bozeman), singles seeking dating pool (limited options in small town).
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How we calculate: Montana has a 2-bracket progressive income tax (2026 rates, House Bill 337 of 2025): 4.7% on the first $47,500 of taxable income and 5.65% on income above $47,500. Taxable income is federal AGI minus the federal standard deduction ($16,100 single, 2026). Our calculator applies these brackets and adds federal income tax using official 2026 IRS brackets. Effective tax rates are calculated by dividing total tax by gross income. For comparison purposes, we show neighboring states' tax calculations at the same income levels using their official 2026 tax brackets and rates.
Data sources:
Verification: Montana's 2-bracket progressive structure (4.7%/5.65%) verified against Montana Department of Revenue 2026 guidance and MT Code Annotated §15-30-2103 as amended by House Bill 337 (2025) for tax year 2026. NO SALES TAX status verified (Montana Constitution Article VIII prohibits sales tax without voter approval). Federal brackets verified against IRS Revenue Procedure 2025-58. Migration data from IRS SOI via Census Bureau. Property tax from MT Dept of Revenue 2025 report. Housing data from Zillow (January 2026). Calculator figures verified May 2026 against live calculator.
Limitations: Assumes single filer, W-2 income only, federal standard deduction ($16,100 single 2026), MT full-year residency. Does not include: property tax variations by county (0.61% average, Bozeman 0.95%, rural 0.6-0.8%), federal credits (EITC, child tax credit), part-year/nonresident calculations, retirement income treatment (Social Security taxed to the extent federally taxable, $5,660 age-65 subtraction for 2025, partial military retirement subtraction for working retirees), natural resource severance taxes (don't apply to wage earners). NO SALES TAX means no sales tax calculations needed (major simplification vs other states). Consult licensed MT CPA for: multi-state income (WY/ID commuters), retirement income optimization (military retirement limit), business income (C-corps 6.75%, pass-throughs at individual progressive rates), real estate transactions (no transfer tax).
Last Updated: May 2026
Verified By: Daniel · CountryTaxCalc
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Last Updated: May 2026