$40K in Durham = $51,765 in Boulder
Your $40K salary in Durham (COL 102) has the same purchasing power as $51,765 in Boulder (COL 132). Boulder is more expensive — you'd need 29% 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 | Durham $40K | Boulder $40K (same salary) |
|---|---|---|
| Monthly take-home | $2,578 | $2,582 |
| 1BR rent | $1,750 | $2,300 |
| Groceries | $372 | $414 |
| Transport | $82 | $80 |
| Utilities | $155 | $138 |
| Internet | $62 | $68 |
| Left after essentials | $157/month | -$418/month |
Frequently asked questions
What is $40K in Durham equivalent to in Boulder?
$40K in Durham (COL index 102) has the same purchasing power as $51,765 in Boulder (COL index 132). That's 29% more than your current salary.
If I move from Durham to Boulder keeping my $40K salary, will I be better off?
Not necessarily. Core expenses in Boulder are higher, so on the same $40K salary you'd have $575 less per month. You'd need to earn $51,765 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 × (132 ÷ 102) = $51,765. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Durham to Boulder
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only