Is it cheaper to live in Boise or Rapid City?

Rapid City, SD is cheaper. Its monthly baseline of $970 (1BR rent + utilities) runs about 24% below Boise, ID's $1,280, mainly because of rent.

How much more do you need to earn to live in Boise than in Rapid City?

To keep rent near the recommended 30% of gross income, you'd want to earn roughly $45,000 a year in Boise versus $32,000 in Rapid City.

Which has lower taxes, Boise or Rapid City?

Boise is taxed under Idaho's rules (a top state income tax rate of 5.30% and a 6% state sales tax); Rapid City under South Dakota's (no state income tax and a 4.2% state sales tax).

Boise vs Rapid City Cost of Living 2026

Boise

Idaho

$1,280/mo est.

Rapid City

South Dakota

$970/mo est.

Monthly estimate = 1BR rent + electricity + gas

A one-person monthly baseline (1BR rent plus typical utilities) runs $1,280 in Boise, ID versus $970 in Rapid City, SD. Overall, Rapid City, SD is roughly 24% cheaper to live in day-to-day than Boise, ID, driven mainly by rent.

Median household income is $81,308 in Boise, ID and $65,712 in Rapid City, SD — about 19% higher in Boise, ID. Idaho has a top state income tax rate of 5.30% and a 6% state sales tax; South Dakota has no state income tax and a 4.2% state sales tax.

Boise, ID

Rapid City, SD

Rent

Studio

$1,021

$533

+48% in Boise, ID

1 Bedroom

$1,133

$807

+29% in Boise, ID

2 Bedroom

$1,342

$1,156

+14% in Boise, ID

3 Bedroom

$1,749

$1,260

+28% in Boise, ID

Buying a Home

Median Home Value

$456,000

$270,000

+41% in Boise, ID

Income

Median Household Income

$81,308

$65,712

+19% in Boise, ID

Metro Median Wage (annual)

$49,100

$46,270

+6% in Boise, ID

People & Lifestyle

Median Age

38.2 yr

39.0 yr

+0.8 yr in Rapid City, SD

Homeownership

63.0%

61.6%

+1.4 pp in Boise, ID

Bachelor's+ (25+)

46.6%

36.4%

+10.2 pp in Boise, ID

Avg Commute

19.1 min

17.4 min

+1.7 min in Boise, ID

Crime (per 100k/yr)

Violent Crime

301

718.9

+139% in Rapid City, SD

Property Crime

1,135.1

3,795.8

+234% in Rapid City, SD

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

Climate

Avg Annual Temperature

52.5°F

47.1°F

+5.4°F in Boise, ID

Annual Precipitation

11.7 in

16.3 in

+4.6 in in Rapid City, SD

Gas

Regular Gasoline

$4.27/gal

$3.85/gal

+10% in Boise, ID

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

Utilities

Electricity (¢/kWh)

14.4

15.4

+7% in Rapid City, SD

Natural Gas ($/MCF)

$11.33

$15.26

+35% in Rapid City, SD

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

Groceries

Milk (gal)

$4.82

$4.31

+10% in Boise, ID

Bread (lb)

$2.04

$1.66

+19% in Boise, ID

Eggs (doz)

$2.19

$3.63

+66% in Rapid City, SD

Ground Beef (lb)

$7.36

$6.77

+8% in Boise, ID

Chicken (lb)

$2.01

$2.10

+4% in Rapid City, SD

Bananas (lb)

$0.70

$0.62

+12% in Boise, ID

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

State Taxes

Sales Tax (ID / SD)

4.2%

+1.8 pp in ID

Income Tax (top rate)

5.30%

None

+5.3 pp in ID

Boise vs Rapid City — FAQ

Is it cheaper to live in Boise or Rapid City?: Rapid City, SD is cheaper. Its monthly baseline of $970 (1BR rent + utilities) runs about 24% below Boise, ID's $1,280, mainly because of rent.
How much more do you need to earn to live in Boise than in Rapid City?: To keep rent near the recommended 30% of gross income, you'd want to earn roughly $45,000 a year in Boise versus $32,000 in Rapid City.
Which has lower taxes, Boise or Rapid City?: Boise is taxed under Idaho's rules (a top state income tax rate of 5.30% and a 6% state sales tax); Rapid City under South Dakota's (no state income tax and a 4.2% 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).