$50K in Montgomery = $54,321 in Rapid City
Your $50K salary in Montgomery (COL 81) has the same purchasing power as $54,321 in Rapid City (COL 88). Rapid City is more expensive — you'd need 9% more to maintain the same lifestyle.
Budget breakdown — $50K in both cities
What $50K actually buys you in each city after taxes and core expenses.
| Expense | Montgomery $50K | Rapid City $50K (same salary) |
|---|---|---|
| Monthly take-home | $2,952 | $3,160 |
| 1BR rent | $1,050 | $1,200 |
| Groceries | $353 | $365 |
| Transport | $38 | $40 |
| Utilities | $170 | $148 |
| Internet | $58 | $65 |
| Left after essentials | $1,283/month | $1,342/month |
Frequently asked questions
What is $50K in Montgomery equivalent to in Rapid City?
$50K in Montgomery (COL index 81) has the same purchasing power as $54,321 in Rapid City (COL index 88). That's 9% more than your current salary.
If I move from Montgomery to Rapid City keeping my $50K salary, will I be better off?
Not necessarily. Core expenses in Rapid City are higher, so on the same $50K salary you'd have $59 less per month. You'd need to earn $54,321 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: $50K × (88 ÷ 81) = $54,321. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Montgomery to Rapid City
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only