Cost of Living: Naperville, IL vs Simi Valley, CA (2026)

Naperville

Illinois
147
VS

Simi Valley

California
200

Naperville is 26% cheaper than Simi Valley.

$1,852/mo ↓ 26%
Median Rent
$2,513/mo ↑ 36%
$150,937/yr ↑ 28%
Median Income
$117,703/yr ↓ 22%
$509,900 ↓ 32%
Home Value
$753,500 ↑ 48%
$2,161/mo ↓ 16%
Owner Costs
$2,576/mo ↑ 19%
149,424
Population
125,769

Tax Comparison

4.95%
Income Tax
13.3%
6.25%
State Sales Tax
7.25%
2.07%
Property Tax
0.71%

Affordability

14.7%
rent-to-income
Affordability
25.6%
rent-to-income

Detailed Comparison

When comparing Naperville, IL and Simi Valley, CA, the overall cost of living indices are 147 and 200 respectively (national median = 100). Rent is $661/month cheaper in Naperville, saving renters about $7,932/year.

Median household income is $33,234/year higher in Naperville. Home values also differ significantly — the median in Naperville is $509,900 compared to $753,500 in Simi Valley.

Illinois has a lower income tax rate, making Naperville slightly more tax-friendly.

Frequently Asked Questions

Naperville vs Simi Valley — common questions

Is Naperville or Simi Valley cheaper to live in?
Based on our cost index, Naperville is cheaper to live in with an index of 147 compared to 200 (US average = 100).
What is the rent difference between Naperville and Simi Valley?
Median rent in Naperville is $1,852/month and in Simi Valley it's $2,513/month — a difference of $661/month.
Which city has higher income, Naperville or Simi Valley?
Median household income is $150,937 in Naperville and $117,703 in Simi Valley. Median household income is $33,234/year higher in Naperville.
How do taxes compare between Illinois and California?
Illinois has 4.95% income tax, 6.25% sales tax, and 2.07% property tax. California has 13.3% income tax, 7.25% sales tax, and 0.71% property tax.
Should I move to Naperville or Simi Valley?
It depends on your priorities. Naperville has a cost index of 147 with median rent of $1,852/mo, while Simi Valley has a cost index of 200 with rent of $2,513/mo. Consider income potential, tax burden, and lifestyle preferences alongside raw cost data.
View Naperville details → View Simi Valley details →

More Comparisons

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