$100K in Rapid City = $96,591 in Augusta
Your $100K salary in Rapid City (COL 88) has the same purchasing power as $96,591 in Augusta (COL 85). Augusta is cheaper — your money goes 3% further there.
Budget breakdown — $100K in both cities
What $100K actually buys you in each city after taxes and core expenses.
| Expense | Rapid City $100K | Augusta $100K (same salary) |
|---|---|---|
| Monthly take-home | $6,321 | $5,863 |
| 1BR rent | $1,200 | $1,200 |
| Groceries | $365 | $353 |
| Transport | $40 | $42 |
| Utilities | $148 | $162 |
| Internet | $65 | $58 |
| Left after essentials | $4,503/month | $4,048/month |
Frequently asked questions
What is $100K in Rapid City equivalent to in Augusta?
$100K in Rapid City (COL index 88) has the same purchasing power as $96,591 in Augusta (COL index 85). That's 3% less than your current salary.
If I move from Rapid City to Augusta keeping my $100K salary, will I be better off?
Yes. If you keep earning $100K after moving to Augusta, you'd have $-455 more per month after core expenses — because Augusta is cheaper than Rapid City.
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 × (85 ÷ 88) = $96,591. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Rapid City to Augusta
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only