$40K in Mobile = $43,415 in Billings
Your $40K salary in Mobile (COL 82) has the same purchasing power as $43,415 in Billings (COL 89). Billings is more expensive — you'd need 9% more to maintain the same lifestyle.
Budget breakdown — $40K in both cities
What $40K actually buys you in each city after taxes and core expenses.
| Expense | Mobile $40K | Billings $40K (same salary) |
|---|---|---|
| Monthly take-home | $2,562 | $2,502 |
| 1BR rent | $1,100 | $1,200 |
| Groceries | $353 | $369 |
| Transport | $38 | $42 |
| Utilities | $172 | $148 |
| Internet | $58 | $68 |
| Left after essentials | $841/month | $675/month |
Frequently asked questions
What is $40K in Mobile equivalent to in Billings?
$40K in Mobile (COL index 82) has the same purchasing power as $43,415 in Billings (COL index 89). That's 9% more than your current salary.
If I move from Mobile to Billings keeping my $40K salary, will I be better off?
Not necessarily. Core expenses in Billings are higher, so on the same $40K salary you'd have $166 less per month. You'd need to earn $43,415 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: $40K × (89 ÷ 82) = $43,415. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Mobile to Billings
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only