$100K in Idaho Falls = $78,966 in Barcelona
Your $100K salary in Idaho Falls (COL 87) has the same purchasing power as $78,966 in Barcelona (COL 69). Barcelona is cheaper — your money goes 21% further there.
Budget breakdown — $100K in both cities
What $100K actually buys you in each city after taxes and core expenses.
| Expense | Idaho Falls $100K | Barcelona $100K (same salary) |
|---|---|---|
| Monthly take-home | $5,838 | $4,529 |
| 1BR rent | $1,100 | $1,300 |
| Groceries | $365 | $380 |
| Transport | $35 | $150 |
| Utilities | $142 | $100 |
| Internet | $65 | $35 |
| Left after essentials | $4,131/month | $2,564/month |
Frequently asked questions
What is $100K in Idaho Falls equivalent to in Barcelona?
$100K in Idaho Falls (COL index 87) has the same purchasing power as $78,966 in Barcelona (COL index 69). That's 21% less than your current salary.
If I move from Idaho Falls to Barcelona keeping my $100K salary, will I be better off?
Yes. If you keep earning $100K after moving to Barcelona, you'd have $-1,567 more per month after core expenses — because Barcelona is cheaper than Idaho Falls.
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: $100K × (69 ÷ 87) = $78,966. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Idaho Falls to Barcelona
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only