Is St. Louis, MO cheaper than Idaho Falls, ID?

Based on cost of living data, St. Louis, MO is 7.0% cheaper than Idaho Falls, ID. This translates to saving $526 per month.

What salary do I need in St. Louis, MO to live like I do in Idaho Falls, ID?

If you earn $150,000 in Idaho Falls, ID, you'd need approximately $143,682.483 in St. Louis, MO to maintain the same standard of living.

How does housing cost compare between Idaho Falls, ID and St. Louis, MO?

Housing in St. Louis, MO is 21.2% cheaper than in Idaho Falls, ID. For a two-bedroom apartment, rent is $1,160/month in St. Louis, MO compared to $915/month in Idaho Falls, ID.

How much can I save per month by moving from Idaho Falls, ID to St. Louis, MO?

Moving from Idaho Falls, ID to St. Louis, MO could save you approximately $526 per month, or $6318 per year, based on a $150,000 salary.

Idaho Falls, ID vs St. Louis, MO: Cost of Living Comparison 2026

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Cost of Living Comparison 2026

📍 Idaho Falls, ID — ZIP-level rent data · COL adjusted from Boise, ID area

Current salary in Idaho Falls, ID

Numbers update automatically as you type

You'd save $526/month moving to St. Louis, MO

$150.0K in your current city equals $143.7K in St. Louis, MO

Rent data from HUD ZIP-level estimates · COL index from area

Overall Cost

↓ 7.0%

Less expensive

Monthly Impact

$526

Savings

Annual Impact

$6.3K

Per year

Based on monthly living costs (rent, groceries, utilities, transport, healthcare). Home purchase prices shown separately below.

Idaho Falls, ID

Population:68K

Cost Index:100

Median Home:$403K

St. Louis, MO

Population:302K

Cost Index:93

Median Home:$145K

Idaho Falls, ID

The Gem State

68K

Population

State Tax

Yes

Located in Idaho, this city has a population of 68K residents.

St. Louis, MO

The Show-Me State

302K

Population

State Tax

Yes

Located in Missouri, this city has a population of 302K residents.

Cost Breakdown by Category

Annual spending: Idaho Falls, ID vs St. Louis, MO

Category	Idaho Falls, ID	St. Louis, MO	Difference	Change
🏠Housing	$2,374/mo	$1,871/mo	↓ $503less	21.2%
🏥Healthcare	$605/mo	$527/mo	↓ $78.75less	13.0%
⚡All Utilities	$457/mo	$535/mo	↑ $78.58more	17.2%
🚗Transportation	$1,170/mo	$1,216/mo	↑ $46.12more	3.9%
📦Other	$1,566/mo	$1,607/mo	↑ $40.71more	2.6%
🛒Groceries	$920/mo	$949/mo	↑ $29.24more	3.2%

🏠Housing

↓ 21.2%

Idaho Falls, ID

$2,374

St. Louis, MO

$1,871

Difference

$503

less

🏥Healthcare

↓ 13.0%

Idaho Falls, ID

$605

St. Louis, MO

$527

Difference

$78.75

less

⚡All Utilities

↑ 17.2%

Idaho Falls, ID

$457

St. Louis, MO

$535

Difference

$78.58

🚗Transportation

↑ 3.9%

Idaho Falls, ID

$1,170

St. Louis, MO

$1,216

Difference

$46.12

📦Other

↑ 2.6%

Idaho Falls, ID

$1,566

St. Louis, MO

$1,607

Difference

$40.71

🛒Groceries

↑ 3.2%

Idaho Falls, ID

$920

St. Louis, MO

$949

Difference

$29.24

🏛️ Local Income Taxes

St. Louis, MO: St. Louis Earnings Tax$1,500/yr (1.0%)

Idaho Falls, ID has no local income tax.

Local taxes are in addition to state income tax. Not all cities levy local income taxes.

🏠Rent Comparison

Studio

From$728

To$910

↑ $182

1 Bed

From$765

To$950

↑ $185

2 Bed

From$915

To$1,160

↑ $245

3 Bed

From$1,276

To$1,490

↑ $214

Idaho Falls, IDZIP-level data

1BR range: $980–$1,260/mo

St. Louis, MOZIP-level data

1BR range: $800–$1,480/mo

💡 Note: Rent prices are based on HUD Fair Market Rent data and represent median costs. Actual prices vary by neighborhood, amenities, and condition. Source: HUD Small Area Fair Market Rents FY2026.

$7,093

Monthly in Idaho Falls, ID

$6,705

Monthly in St. Louis, MO

$387

Difference

Home Values

Idaho Falls

St. Louis

$403K

Median Value

$145K

↑ +0.4%

YoY Change

↓ -0.8%

↑ +32.9%

5-Year Change

↑ +10.9%

$356K - $419K

Price Range

$38K - $302K

Homes in St. Louis are 64% less expensive than Idaho Falls

Calculate payment - Idaho Falls Calculate payment - St. Louis

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

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings

↑ $8.3K

Per year

Monthly Difference

$693

More take-home

Effective Rate Diff

5.5%

Rate difference

Idaho Falls, ID

Federal Income Tax

Effective: 18.9%

$25.5K

Idaho State Tax

Effective: 10.8%

$16.2K

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 35.5%

$53.3K

Take-Home Pay

$8,062/month

$96.7K

St. Louis, MO

Federal Income Tax

Effective: 18.9%

$25.5K

Missouri State Tax

Effective: 5.3%

$7.9K

FICA Taxes

Social Security + Medicare

$11.5K

Total Taxes

Effective: 30.0%

$44.9K

Take-Home Pay

$8,755/month

$105.1K

Additional Tax Information

Idaho Falls, ID Tax Rates

Sales Tax:6.3%

Property Tax:0.7%

St. Louis, MO Tax Rates

Sales Tax:8.2%

Property Tax:1.0%

💡 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.