Ladue, MO vs Oak Brook, IL: Cost of Living

Which city costs less?

Oak Brook, IL has a modeled overall cost index 17.5% higher than Ladue, MO.

Ladue, MO · modeled 2BR rent
$1,830 / month
Oak Brook, IL · modeled 2BR rent
$2,450 / 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 Ladue, MO and Oak Brook, IL 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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Estimated extra cost: $1,626/month in Oak Brook, IL

$150,000 in your current city has a modeled equivalent of $169,506 in Oak Brook, IL

Regional cost estimates: Ladue, MO uses St. Louis, MO. Oak Brook, IL uses Chicago, IL. Available city ZIP rent estimates are shown separately.
Overall Cost
↑ 17.5%
More expensive
Monthly Impact
$1,626
Extra cost
Annual Impact
$19.5K
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.

Ladue, MO

Population:9K
Cost Index:
80.3
100 = national average
Typical Home:$1.20M

Oak Brook, IL

Population:8K
Cost Index:
94.4
100 = national average
Typical Home:$1.15M

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Ladue, MO

The Show-Me State

9K
Population
State Tax
Yes

Located in Missouri, this city has a population of 9K residents.

Oak Brook, IL

The Prairie State

8K
Population
State Tax
Yes

Located in Illinois, this city has a population of 8K residents.

Cost Breakdown by Category

Estimated monthly spending: Ladue, MO vs Oak Brook, IL

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.

Housing
↑ 55.0%
Ladue, MO
$1,914
Oak Brook, IL
$2,966
Difference
$1,052
more
Transportation
↑ 30.7%
Ladue, MO
$1,382
Oak Brook, IL
$1,806
Difference
$424
more
Other
↑ 3.4%
Ladue, MO
$1,826
Oak Brook, IL
$1,889
Difference
$62.84
more
Healthcare
↑ 9.8%
Ladue, MO
$623
Oak Brook, IL
$684
Difference
$61.25
more
Groceries
↑ 5.4%
Ladue, MO
$1,123
Oak Brook, IL
$1,184
Difference
$61.06
more
All Utilities
↓ 5.7%
Ladue, MO
$633
Oak Brook, IL
$597
Difference
$36.27
less

🏠Rent Comparison

Studio
From$1,440
To$2,040
↑ $600
1 Bed
From$1,490
To$2,170
↑ $680
2 Bed
From$1,830
To$2,450
↑ $620
3 Bed
From$2,360
To$3,160
↑ $800
Ladue, MOZIP-level data

1BR range: $1,490–$1,490/mo

Oak Brook, ILZIP-level data

1BR range: $2,170–$2,170/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 Ladue, MO
$9,126
Monthly in Oak Brook, IL
$1,626
Difference

Home Values

Ladue
Oak Brook
$1.20M
Median Value
$1.15M
↑ +6.5%
YoY Change
↑ +8.5%
↑ +45.5%
5-Year Change
↑ +37.9%

Homes in Oak Brook are 4% less expensive than Ladue

Calculate payment - LadueCalculate payment - Oak Brook

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

Tax Comparison

Annual tax burden comparison at $150.0K salary

Tax Savings
↑ $504
Per year
Monthly Difference
$42.00
More take-home
Effective Rate Diff
0.3%
Rate difference

Ladue, 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

Oak Brook, IL

Federal Income Tax
Effective: 18.9%
$25.5K
Illinois State Tax
Effective: 5.0%
$7.4K
FICA Taxes
Social Security + Medicare
$11.5K
Total Taxes
Effective: 29.6%
$44.4K
Take-Home Pay
$8,797/month
$105.6K

Additional Tax Information

Ladue, MO Tax Rates

Sales Tax:8.2%
Property Tax:1.0%

Oak Brook, IL Tax Rates

Sales Tax:8.8%
Property Tax:2.2%

💡 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

Ladue
Oak Brook
54 Moderate
Air Quality
54 Moderate
38%
Good Air Days
35.8%
99 High
Climate Risk
100 Very High
🌊🌡🫨
Top Hazards
🌊🌡🫨
▲+3.0°F
2050 Outlook
▲+3.2°F
39 days
Heat Days >95°F
18 days
▲+3.0°F
2050 Outlook
▲+3.2°F
39 days
Heat Days >95°F
18 days

Before moving from Ladue, MO to Oak Brook, IL

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

  1. Compare actual homes. Get current quotes in Oak Brook, IL for the same bedroom count and included utilities as your home in Ladue, MO. 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 Ladue to Oak Brook moving checklist to organize the tasks and timing.

Still choosing a destination? Explore cities similar to Oak Brook, IL by cost, housing, population and region.

Frequently Asked Questions: Ladue, MO vs Oak Brook, IL

How do the cost estimates for Ladue, MO and Oak Brook, IL compare?

Oak Brook, IL has a modeled overall cost index 17.5% higher than Ladue, MO. 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 Ladue, MO, the model estimates $169,506 in Oak Brook, IL. 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 Ladue, MO and Oak Brook, IL?

The modeled two-bedroom rents are $1,830/month in Ladue, MO and $2,450/month in Oak Brook, IL. 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 Missouri and Illinois on TaxTakeHome.com

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