$40K in Chattanooga = $48,837 in Boise
Your $40K salary in Chattanooga (COL 86) has the same purchasing power as $48,837 in Boise (COL 105). Boise is more expensive — you'd need 22% more to maintain the same lifestyle.
Budget breakdown — $40K in both cities
What $40K actually buys you in each city after taxes and core expenses.
| Expense | Chattanooga $40K | Boise $40K (same salary) |
|---|---|---|
| Monthly take-home | $2,728 | $2,535 |
| 1BR rent | $1,250 | $1,600 |
| Groceries | $357 | $372 |
| Transport | $45 | $45 |
| Utilities | $165 | $145 |
| Internet | $58 | $60 |
| Left after essentials | $853/month | $313/month |
Frequently asked questions
What is $40K in Chattanooga equivalent to in Boise?
$40K in Chattanooga (COL index 86) has the same purchasing power as $48,837 in Boise (COL index 105). That's 22% more than your current salary.
If I move from Chattanooga to Boise keeping my $40K salary, will I be better off?
Not necessarily. Core expenses in Boise are higher, so on the same $40K salary you'd have $540 less per month. You'd need to earn $48,837 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: $40K × (105 ÷ 86) = $48,837. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Chattanooga to Boise
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only