$120K in Charleston = $101,443 in Rockford
Your $120K salary in Charleston (COL 97) has the same purchasing power as $101,443 in Rockford (COL 82). Rockford is cheaper — your money goes 15% further there.
Budget breakdown — $120K in both cities
What $120K actually buys you in each city after taxes and core expenses.
| Expense | Charleston $120K | Rockford $120K (same salary) |
|---|---|---|
| Monthly take-home | $6,535 | $6,655 |
| 1BR rent | $1,900 | $1,050 |
| Groceries | $376 | $357 |
| Transport | $55 | $50 |
| Utilities | $162 | $158 |
| Internet | $63 | $58 |
| Left after essentials | $3,979/month | $4,982/month |
Frequently asked questions
What is $120K in Charleston equivalent to in Rockford?
$120K in Charleston (COL index 97) has the same purchasing power as $101,443 in Rockford (COL index 82). That's 15% less than your current salary.
If I move from Charleston to Rockford keeping my $120K salary, will I be better off?
Yes. If you keep earning $120K after moving to Rockford, you'd have $1,003 more per month after core expenses — because Rockford is cheaper than Charleston.
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 × (82 ÷ 97) = $101,443. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Charleston to Rockford
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only