Boulder, MT vs Castle Dale, UT: Cost of Living

Which city costs less?

Castle Dale, UT has a modeled overall cost index 0.2% higher than Boulder, MT.

Boulder, MT · modeled 2BR rent
$1,230 / month
Castle Dale, UT · modeled 2BR rent
$1,030 / month

These are saved estimates, not current rental listings. Some cities use adjusted regional data. Your household budget can differ from the overall index. Sources and assumptions

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Cost of Living Comparison 2026

Compare Boulder, MT and Castle Dale, UT using saved regional data and explicit budgeting assumptions. Rent estimates are not live listings. Change the salary below, then check the source notes before applying a result to your household.

Saved regional estimates · Sources and assumptions

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Numbers update automatically as you type

Estimated savings: $331/month in Castle Dale, UT

$150,000 in your current city has a modeled equivalent of $146,033 in Castle Dale, UT

Regional cost estimates: Boulder, MT uses Spokane, WA. Castle Dale, UT uses North Las Vegas, NV. Available city ZIP rent estimates are shown separately.
Overall Cost
↑ 0.2%
More expensive
Monthly Impact
$331
Savings
Annual Impact
$4.0K
Per year

Assumes 60% of current gross income goes to living costs. The headline uses the category budget below; taxes, moving costs and savings goals are excluded.

Boulder, MT

Population:1K
Cost Index:
70.5
100 = national average
Typical Home:$339K

Castle Dale, UT

Population:2K
Cost Index:
70.7
100 = national average
Typical Home:$290K

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Boulder, MT

The Treasure State

1K
Population
State Tax
Yes

Located in Montana, this city has a population of 1K residents.

Castle Dale, UT

The Beehive State

2K
Population
State Tax
Yes

Located in Utah, this city has a population of 2K residents.

Cost Breakdown by Category

Estimated monthly spending: Boulder, MT vs Castle Dale, UT

Assumes 60% of your current gross income is spent on these categories. The headline and totals use this same budget. Rent estimates below are separate reference data. Rounded amounts may differ by $1.

Transportation
↓ 24.9%
Boulder, MT
$1,718
Castle Dale, UT
$1,291
Difference
$427
less
Housing
↑ 19.4%
Boulder, MT
$1,884
Castle Dale, UT
$2,250
Difference
$366
more
Healthcare
↓ 26.3%
Boulder, MT
$865
Castle Dale, UT
$638
Difference
$227
less
Groceries
↓ 7.4%
Boulder, MT
$1,133
Castle Dale, UT
$1,049
Difference
$84.16
less
Other
↑ 2.5%
Boulder, MT
$1,394
Castle Dale, UT
$1,428
Difference
$34.37
more
All Utilities
↑ 1.6%
Boulder, MT
$505
Castle Dale, UT
$513
Difference
$8.07
more

🏠Rent Comparison

Studio
From$840
To$750
↓ $90.00
1 Bed
From$940
To$940
→ $0
2 Bed
From$1,230
To$1,030
↓ $200
3 Bed
From$1,720
To$1,390
↓ $330
Boulder, MTZIP-level data

1BR range: $940–$940/mo

Castle Dale, UTZIP-level data

1BR range: $940–$940/mo

💡 Note: HUD Fair Market Rents estimate 40th-percentile gross rents, including most tenant-paid utilities. City ZIP summaries are medians of those estimates, not market median rents. Actual prices vary by neighborhood, amenities, and condition. Source: HUD Small Area Fair Market Rents FY2026.

$7,500
Monthly in Boulder, MT
$7,169
Monthly in Castle Dale, UT
$331
Difference

Home Values

Boulder
Castle Dale
$339K
Median Value
$290K
↑ +6.4%
YoY Change
↑ +6.6%
↑ +61.3%
5-Year Change
N/A

Homes in Castle Dale are 15% less expensive than Boulder

Calculate payment - BoulderCalculate payment - Castle Dale

Source: Zillow Home Value Index (ZHVI), January 2026

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings
↑ $2.3K
Per year
Monthly Difference
$191
More take-home
Effective Rate Diff
1.5%
Rate difference

Boulder, MT

Federal Income Tax
Effective: 18.9%
$25.5K
Montana State Tax
Effective: 6.4%
$9.6K
FICA Taxes
Social Security + Medicare
$11.5K
Total Taxes
Effective: 31.1%
$46.6K
Take-Home Pay
$8,618/month
$103.4K

Castle Dale, UT

Federal Income Tax
Effective: 18.9%
$25.5K
Utah State Tax
Effective: 4.9%
$7.3K
FICA Taxes
Social Security + Medicare
$11.5K
Total Taxes
Effective: 29.5%
$44.3K
Take-Home Pay
$8,809/month
$105.7K

Additional Tax Information

Boulder, MT Tax Rates

Sales Tax:0.0%
Property Tax:0.8%

Castle Dale, UT Tax Rates

Sales Tax:7.4%
Property Tax:0.6%

💡 Note: Tax calculations are estimates based on 2024/2025 tax brackets for single filers with standard deduction. Actual taxes may vary based on filing status, deductions, credits, and local variations.

Environment

Boulder
Castle Dale
38 Good
Air Quality
64 Moderate
76.5%
Good Air Days
24.6%
90 Moderate
Climate Risk
100 Very High
💨
Top Hazards
🔥🌊🌡
▲+3.0°F
2050 Outlook
▲+2.7°F
23 days
Heat Days >95°F
144 days
▲+3.0°F
2050 Outlook
▲+2.7°F
23 days
Heat Days >95°F
144 days

Before moving from Boulder, MT to Castle Dale, UT

Use this comparison to shortlist a move, then check the costs that depend on your household.

  1. Compare actual homes. Get current quotes in Castle Dale, UT for the same bedroom count and included utilities as your home in Boulder, MT. Add parking, deposits, insurance and any overlapping leases. The rent estimates above are a starting point, not available listings.
  2. Confirm your income. Check your expected pay with your employer, including any location adjustment. Use “Different salary at destination?” above to compare two incomes. The budget model excludes taxes and one-time moving costs; it is not a take-home-pay calculation.
  3. Price your daily routine. Check the commute from a specific address to work, school or childcare. Add household expenses missing from this model, such as childcare, debt payments and medical needs. Verify local services before signing a lease.
  4. Plan the transition. Get moving quotes and budget for travel, setup costs and time off. Open your Boulder to Castle Dale moving checklist to organize the tasks and timing.

Still choosing a destination? Explore cities similar to Castle Dale, UT by cost, housing, population and region.

Frequently Asked Questions: Boulder, MT vs Castle Dale, UT

How do the cost estimates for Boulder, MT and Castle Dale, UT compare?

Castle Dale, UT has a modeled overall cost index 0.2% higher than Boulder, MT. This is a broad model comparison, not a survey of today's prices or a forecast of your household spending. Some cities use adjusted regional fallback data.

What does the equivalent salary mean?

At a $150,000 salary in Boulder, MT, the model estimates $146,033 in Castle Dale, UT. It allocates 60% of gross income to the origin city’s category budget and applies each destination category’s relative cost. The equivalent salary adds the total category difference to your income. The monthly difference is the same category difference divided by 12; it is not take-home pay or guaranteed savings. Household size, childcare and your actual lease are not inputs to this calculation.

What rent estimates are available for Boulder, MT and Castle Dale, UT?

The modeled two-bedroom rents are $1,230/month in Boulder, MT and $1,030/month in Castle Dale, UT. Where available, the source is a city median of HUD FY2026 ZIP-level estimates; otherwise a saved metro table is used. City adjustments may also apply. These are not asking rents or available listings. Compare actual properties with the same bedroom count and included utilities.

How should I use this comparison before moving?

Use it to shortlist locations, then replace modeled costs with a current housing quote, employer-confirmed income, commute costs, insurance and your household's other expenses. Add one-time moving costs separately. Source years differ and the saved datasets are not a live price feed. Read the methodology for the formulas and fallback rules.

💰 See how taxes change too — compare take-home pay between Montana and Utah on TaxTakeHome.com

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