$75K in Idaho Falls = $83,621 in Charleston
Your $75K salary in Idaho Falls (COL 87) has the same purchasing power as $83,621 in Charleston (COL 97). Charleston is more expensive — you'd need 11% 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 | Idaho Falls $75K | Charleston $75K (same salary) |
|---|---|---|
| Monthly take-home | $4,378 | $4,353 |
| 1BR rent | $1,100 | $1,900 |
| Groceries | $365 | $376 |
| Transport | $35 | $55 |
| Utilities | $142 | $162 |
| Internet | $65 | $63 |
| Left after essentials | $2,671/month | $1,797/month |
Frequently asked questions
What is $75K in Idaho Falls equivalent to in Charleston?
$75K in Idaho Falls (COL index 87) has the same purchasing power as $83,621 in Charleston (COL index 97). That's 11% more than your current salary.
If I move from Idaho Falls to Charleston keeping my $75K salary, will I be better off?
Not necessarily. Core expenses in Charleston are higher, so on the same $75K salary you'd have $874 less per month. You'd need to earn $83,621 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 × (97 ÷ 87) = $83,621. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Idaho Falls to Charleston
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only