Is it cheaper to live in Aurora or Billings?

Billings, MT is cheaper. Its monthly baseline of $1,030 (1BR rent + utilities) runs about 27% below Aurora, IL's $1,420, mainly because of rent.

How much more do you need to earn to live in Aurora than in Billings?

To keep rent near the recommended 30% of gross income, you'd want to earn roughly $47,000 a year in Aurora versus $36,000 in Billings.

Which has lower taxes, Aurora or Billings?

Aurora is taxed under Illinois's rules (a top state income tax rate of 4.95% and a 6.25% state sales tax); Billings under Montana's (a top state income tax rate of 5.65% and no state sales tax).

Aurora vs Billings Cost of Living 2026

Aurora

Illinois

$1,420/mo est.

Billings

Montana

$1,030/mo est.

Monthly estimate = 1BR rent + electricity + gas

A one-person monthly baseline (1BR rent plus typical utilities) runs $1,420 in Aurora, IL versus $1,030 in Billings, MT. Overall, Billings, MT is roughly 27% cheaper to live in day-to-day than Aurora, IL, driven mainly by rent.

Median household income is $90,109 in Aurora, IL and $71,855 in Billings, MT — about 20% higher in Aurora, IL. Illinois has a top state income tax rate of 4.95% and a 6.25% state sales tax; Montana has a top state income tax rate of 5.65% and no state sales tax.

Aurora, IL

Billings, MT

Rent

Studio

$893

$877

+2% in Aurora, IL

1 Bedroom

$1,183

$889

+25% in Aurora, IL

2 Bedroom

$1,550

$1,102

+29% in Aurora, IL

3 Bedroom

$1,797

$1,398

+22% in Aurora, IL

Buying a Home

Median Home Value

$260,400

$311,800

+20% in Billings, MT

Income

Median Household Income

$90,109

$71,855

+20% in Aurora, IL

Metro Median Wage (annual)

$54,720

$49,060

+10% in Aurora, IL

People & Lifestyle

Median Age

35.2 yr

38.1 yr

+2.9 yr in Billings, MT

Homeownership

66.8%

64.8%

+2.0 pp in Aurora, IL

Bachelor's+ (25+)

37.2%

37.0%

+0.2 pp in Aurora, IL

Avg Commute

28.0 min

16.7 min

+11.3 min in Aurora, IL

Crime (per 100k/yr)

Violent Crime

269.4

750.2

+178% in Billings, MT

Property Crime

1,247.4

3,123.5

+150% in Billings, MT

FBI Crime Data Explorer. Offenses per 100,000 residents per year; agency reporting practices vary, so this is approximate.

Climate

Avg Annual Temperature

49.9°F

48.2°F

+1.7°F in Aurora, IL

Annual Precipitation

36.9 in

13.7 in

+23.2 in in Aurora, IL

Gas

Regular Gasoline

$3.94/gal

$4.29/gal

+9% in Billings, MT

Area: Midwest (PADD 2) vs Rocky Mountain (PADD 4).

Utilities

Electricity (¢/kWh)

23.9

14.7

+38% in Aurora, IL

Natural Gas ($/MCF)

$15.39

$8.77

+43% in Aurora, IL

Residential, state-level averages (EIA). MCF = 1,000 cubic feet.

Groceries

Milk (gal)

$4.31

$4.82

+12% in Billings, MT

Bread (lb)

$1.66

$2.04

+23% in Billings, MT

Eggs (doz)

$3.63

$2.19

+40% in Aurora, IL

Ground Beef (lb)

$6.77

$7.36

+9% in Billings, MT

Chicken (lb)

$2.10

$2.01

+4% in Aurora, IL

Bananas (lb)

$0.62

$0.70

+14% in Billings, MT

Average prices — Midwest vs West (BLS). Regional where available, otherwise U.S. average.

State Taxes

Sales Tax (IL / MT)

6.25%

None

+6.3 pp in IL

Income Tax (top rate)

4.95%

5.65%

+0.7 pp in MT

Aurora vs Billings — FAQ

Is it cheaper to live in Aurora or Billings?: Billings, MT is cheaper. Its monthly baseline of $1,030 (1BR rent + utilities) runs about 27% below Aurora, IL's $1,420, mainly because of rent.
How much more do you need to earn to live in Aurora than in Billings?: To keep rent near the recommended 30% of gross income, you'd want to earn roughly $47,000 a year in Aurora versus $36,000 in Billings.
Which has lower taxes, Aurora or Billings?: Aurora is taxed under Illinois's rules (a top state income tax rate of 4.95% and a 6.25% state sales tax); Billings under Montana's (a top state income tax rate of 5.65% and no state sales tax).

Sources: US Census Bureau, ACS 5-Year (rent, income, home value, demographics); NOAA Climate Normals 1981–2010 (climate); EIA weekly retail (gas); Tax Foundation 2026 (state taxes).