$100K in St. Louis = $94,253 in Mobile
Your $100K salary in St. Louis (COL 87) has the same purchasing power as $94,253 in Mobile (COL 82). Mobile is cheaper — your money goes 6% further there.
Budget breakdown — $100K in both cities
What $100K actually buys you in each city after taxes and core expenses.
| Expense | St. Louis $100K | Mobile $100K (same salary) |
|---|---|---|
| Monthly take-home | $5,929 | $5,904 |
| 1BR rent | $1,300 | $1,100 |
| Groceries | $369 | $353 |
| Transport | $75 | $38 |
| Utilities | $162 | $172 |
| Internet | $60 | $58 |
| Left after essentials | $3,963/month | $4,183/month |
Frequently asked questions
What is $100K in St. Louis equivalent to in Mobile?
$100K in St. Louis (COL index 87) has the same purchasing power as $94,253 in Mobile (COL index 82). That's 6% less than your current salary.
If I move from St. Louis to Mobile keeping my $100K salary, will I be better off?
Yes. If you keep earning $100K after moving to Mobile, you'd have $220 more per month after core expenses — because Mobile is cheaper than St. Louis.
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 × (82 ÷ 87) = $94,253. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — St. Louis to Mobile
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only