Cost of Living: Naperville, IL vs Round Rock, TX (2026)

Naperville

Illinois
147
VS

Round Rock

Texas
122

Naperville is 20% more expensive than Round Rock.

$1,852/mo ↑ 8%
Median Rent
$1,713/mo ↓ 8%
$150,937/yr ↑ 55%
Median Income
$97,187/yr ↓ 36%
$509,900 ↑ 33%
Home Value
$383,700 ↓ 25%
$2,161/mo ↑ 21%
Owner Costs
$1,781/mo ↓ 18%
149,424
Population
124,288

Tax Comparison

4.95%
Income Tax
0%
6.25%
State Sales Tax
6.25%
2.07%
Property Tax
1.6%

Affordability

14.7%
rent-to-income
Affordability
21.2%
rent-to-income

Detailed Comparison

When comparing Naperville, IL and Round Rock, TX, the overall cost of living indices are 147 and 122 respectively (national median = 100). Rent is $139/month cheaper in Round Rock, saving renters about $1,668/year.

Median household income is $53,750/year higher in Naperville. Home values also differ significantly — the median in Naperville is $509,900 compared to $383,700 in Round Rock.

Texas has no state income tax, giving Round Rock residents a significant tax advantage over Illinois's 4.95% rate.

Frequently Asked Questions

Naperville vs Round Rock — common questions

Is Naperville or Round Rock cheaper to live in?
Based on our cost index, Round Rock is cheaper to live in with an index of 122 compared to 147 (US average = 100).
What is the rent difference between Naperville and Round Rock?
Median rent in Naperville is $1,852/month and in Round Rock it's $1,713/month — a difference of $139/month.
Which city has higher income, Naperville or Round Rock?
Median household income is $150,937 in Naperville and $97,187 in Round Rock. Median household income is $53,750/year higher in Naperville.
How do taxes compare between Illinois and Texas?
Illinois has 4.95% income tax, 6.25% sales tax, and 2.07% property tax. Texas has 0% income tax, 6.25% sales tax, and 1.6% property tax.
Should I move to Naperville or Round Rock?
It depends on your priorities. Naperville has a cost index of 147 with median rent of $1,852/mo, while Round Rock has a cost index of 122 with rent of $1,713/mo. Consider income potential, tax burden, and lifestyle preferences alongside raw cost data.
View Naperville details → View Round Rock details →

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