$40K in San Francisco = $17,938 in Idaho Falls
Your $40K salary in San Francisco (COL 194) has the same purchasing power as $17,938 in Idaho Falls (COL 87). Idaho Falls is cheaper — your money goes 55% further there.
Budget breakdown — $40K in both cities
What $40K actually buys you in each city after taxes and core expenses.
| Expense | San Francisco $40K | Idaho Falls $40K (same salary) |
|---|---|---|
| Monthly take-home | $2,418 | $2,535 |
| 1BR rent | $3,600 | $1,100 |
| Groceries | $448 | $365 |
| Transport | $100 | $35 |
| Utilities | $160 | $142 |
| Internet | $70 | $65 |
| Left after essentials | -$1,960/month | $828/month |
Frequently asked questions
What is $40K in San Francisco equivalent to in Idaho Falls?
$40K in San Francisco (COL index 194) has the same purchasing power as $17,938 in Idaho Falls (COL index 87). That's 55% less than your current salary.
If I move from San Francisco to Idaho Falls keeping my $40K salary, will I be better off?
Yes. If you keep earning $40K after moving to Idaho Falls, you'd have $2,788 more per month after core expenses — because Idaho Falls is cheaper than San Francisco.
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 × (87 ÷ 194) = $17,938. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — San Francisco to Idaho Falls
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only