$120K in Fayetteville = $121,395 in Idaho Falls
Your $120K salary in Fayetteville (COL 86) has the same purchasing power as $121,395 in Idaho Falls (COL 87). Idaho Falls is more expensive — you'd need 1% more to maintain the same lifestyle.
Budget breakdown — $120K in both cities
What $120K actually buys you in each city after taxes and core expenses.
| Expense | Fayetteville $120K | Idaho Falls $120K (same salary) |
|---|---|---|
| Monthly take-home | $6,715 | $6,575 |
| 1BR rent | $1,300 | $1,100 |
| Groceries | $361 | $365 |
| Transport | $42 | $35 |
| Utilities | $162 | $142 |
| Internet | $60 | $65 |
| Left after essentials | $4,790/month | $4,868/month |
Frequently asked questions
What is $120K in Fayetteville equivalent to in Idaho Falls?
$120K in Fayetteville (COL index 86) has the same purchasing power as $121,395 in Idaho Falls (COL index 87). That's 1% more than your current salary.
If I move from Fayetteville to Idaho Falls keeping my $120K salary, will I be better off?
Not necessarily. Core expenses in Idaho Falls are higher, so on the same $120K salary you'd have $78 less per month. You'd need to earn $121,395 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: $120K × (87 ÷ 86) = $121,395. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Fayetteville 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