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Cost of Living Comparison 2026

📍 O'Fallon, MO — COL adjusted from St. Louis, MO area + state data

$

Numbers update automatically as you type

You'd spend $2.2K/month more in Denver, CO

$150.0K in your current city equals $176.2K in Denver, CO

Rent data from HUD ZIP-level estimates · COL index from St. Louis, MO-IL area
Overall Cost
↑ 29.1%
More expensive
Monthly Impact
$2,183
Extra cost
Annual Impact
$26.2K
Per year

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

O'Fallon, MO

Population:94K
Cost Index:100
Median Home:$145K

Denver, CO

Population:716K
Cost Index:129
Median Home:$513K

O'Fallon, MO

The Show-Me State

94K
Population
State Tax
Yes

Located in Missouri, this city has a population of 94K residents.

Denver, CO

The Centennial State

716K
Population
State Tax
Yes
Climate
Semi-arid

Notable Facts

  • •Mile-high city (5,280 ft)
  • •Outdoor recreation hub
  • •Major cannabis market

Major Industries

AerospaceTechnologyEnergyTourism

Cost Breakdown by Category

Annual spending: O'Fallon, MO vs Denver, CO

🏠Housing
↑ 97.0%
O'Fallon, MO
$1,649
Denver, CO
$3,248
Difference
$1,599
more
🚗Transportation
↑ 22.8%
O'Fallon, MO
$1,191
Denver, CO
$1,462
Difference
$271
more
📦Other
↑ 12.8%
O'Fallon, MO
$1,574
Denver, CO
$1,774
Difference
$201
more
🏥Healthcare
↑ 21.3%
O'Fallon, MO
$521
Denver, CO
$632
Difference
$111
more
🛒Groceries
↑ 9.6%
O'Fallon, MO
$939
Denver, CO
$1,029
Difference
$89.82
more
⚡All Utilities
↓ 2.0%
O'Fallon, MO
$530
Denver, CO
$519
Difference
$10.82
less

🏛️ Local Income Taxes

Denver, CO: Denver Head Tax ($5.75/mo, negligible)$69.00/yr (0.0%)

O'Fallon, MO 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$541
To$1,720
↑ $1,179
1 Bed
From$624
To$1,840
↑ $1,216
2 Bed
From$749
To$2,190
↑ $1,441
3 Bed
From$1,041
To$2,870
↑ $1,829
Denver, COZIP-level data

1BR range: $1,620–$2,540/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.

$6,404
Monthly in O'Fallon, MO
$8,665
Monthly in Denver, CO
$2,261
Difference

Home Values

O'Fallon
Denver
-
Median Value
$513K
-
YoY Change
↓ -4.2%
-
5-Year Change
↑ +13%
-
Price Range
$352K - $933K
Calculate payment - Denver

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

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings
↑ $1.3K
Per year
Monthly Difference
$111
More take-home
Effective Rate Diff
0.9%
Rate difference

O'Fallon, 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

Denver, CO

Federal Income Tax
Effective: 18.9%
$25.5K
Colorado State Tax
Effective: 4.4%
$6.6K
FICA Taxes
Social Security + Medicare
$11.5K
Total Taxes
Effective: 29.1%
$43.6K
Take-Home Pay
$8,866/month
$106.4K

Additional Tax Information

O'Fallon, MO Tax Rates

Sales Tax:8.2%
Property Tax:1.0%

Denver, CO Tax Rates

Sales Tax:7.8%
Property Tax:0.5%

💡 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

O'Fallon
Denver
54 Moderate
Air Quality
55 Moderate
38%
Good Air Days
35.2%
99 High
Climate Risk
95 High
🌊🌡🫨
Top Hazards
🌊🌪💨
▲+3.0°F
2050 Outlook
▲+3.3°F
39 days
Heat Days >95°F
28 days
▲+3.0°F
2050 Outlook
▲+3.3°F
39 days
Heat Days >95°F
28 days

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

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