$120K in Billings = $113,258 in Erie
Your $120K salary in Billings (COL 89) has the same purchasing power as $113,258 in Erie (COL 84). Erie is cheaper — your money goes 6% further there.
Budget breakdown — $120K in both cities
What $120K actually buys you in each city after taxes and core expenses.
| Expense | Billings $120K | Erie $120K (same salary) |
|---|---|---|
| Monthly take-home | $6,475 | $6,845 |
| 1BR rent | $1,200 | $1,100 |
| Groceries | $369 | $365 |
| Transport | $42 | $60 |
| Utilities | $148 | $168 |
| Internet | $68 | $62 |
| Left after essentials | $4,648/month | $5,090/month |
Frequently asked questions
What is $120K in Billings equivalent to in Erie?
$120K in Billings (COL index 89) has the same purchasing power as $113,258 in Erie (COL index 84). That's 6% less than your current salary.
If I move from Billings to Erie keeping my $120K salary, will I be better off?
Yes. If you keep earning $120K after moving to Erie, you'd have $442 more per month after core expenses — because Erie is cheaper than Billings.
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 × (84 ÷ 89) = $113,258. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Billings to Erie
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only