$120K in Idaho Falls = $151,724 in Melbourne
Your $120K salary in Idaho Falls (COL 87) has the same purchasing power as $151,724 in Melbourne (COL 110). Melbourne is more expensive — you'd need 26% 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 | Idaho Falls $120K | Melbourne $120K (same salary) |
|---|---|---|
| Monthly take-home | $6,575 | $4,800 |
| 1BR rent | $1,100 | $1,600 |
| Groceries | $365 | $380 |
| Transport | $35 | $150 |
| Utilities | $142 | $130 |
| Internet | $65 | $62 |
| Left after essentials | $4,868/month | $2,478/month |
Frequently asked questions
What is $120K in Idaho Falls equivalent to in Melbourne?
$120K in Idaho Falls (COL index 87) has the same purchasing power as $151,724 in Melbourne (COL index 110). That's 26% more than your current salary.
If I move from Idaho Falls to Melbourne keeping my $120K salary, will I be better off?
Not necessarily. Core expenses in Melbourne are higher, so on the same $120K salary you'd have $2,390 less per month. You'd need to earn $151,724 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 × (110 ÷ 87) = $151,724. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Idaho Falls to Melbourne
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only