$75K in Rapid City = $89,489 in Boise
Your $75K salary in Rapid City (COL 88) has the same purchasing power as $89,489 in Boise (COL 105). Boise is more expensive — you'd need 19% more to maintain the same lifestyle.
Budget breakdown — $75K in both cities
What $75K actually buys you in each city after taxes and core expenses.
| Expense | Rapid City $75K | Boise $75K (same salary) |
|---|---|---|
| Monthly take-home | $4,741 | $4,378 |
| 1BR rent | $1,200 | $1,600 |
| Groceries | $365 | $372 |
| Transport | $40 | $45 |
| Utilities | $148 | $145 |
| Internet | $65 | $60 |
| Left after essentials | $2,923/month | $2,156/month |
Frequently asked questions
What is $75K in Rapid City equivalent to in Boise?
$75K in Rapid City (COL index 88) has the same purchasing power as $89,489 in Boise (COL index 105). That's 19% more than your current salary.
If I move from Rapid City to Boise keeping my $75K salary, will I be better off?
Not necessarily. Core expenses in Boise are higher, so on the same $75K salary you'd have $767 less per month. You'd need to earn $89,489 to maintain the same standard of living.
How is the salary equivalent calculated?
The equivalent salary is calculated by multiplying your current salary by the ratio of the two cities' overall cost of living indices: $75K × (105 ÷ 88) = $89,489. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Rapid City to Boise
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only