$100K in Boise = $97,143 in Flagstaff
Your $100K salary in Boise (COL 105) has the same purchasing power as $97,143 in Flagstaff (COL 102). Flagstaff 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 | Boise $100K | Flagstaff $100K (same salary) |
|---|---|---|
| Monthly take-home | $5,838 | $6,113 |
| 1BR rent | $1,600 | $1,650 |
| Groceries | $372 | $384 |
| Transport | $45 | $45 |
| Utilities | $145 | $195 |
| Internet | $60 | $65 |
| Left after essentials | $3,616/month | $3,774/month |
Frequently asked questions
What is $100K in Boise equivalent to in Flagstaff?
$100K in Boise (COL index 105) has the same purchasing power as $97,143 in Flagstaff (COL index 102). That's 3% less than your current salary.
If I move from Boise to Flagstaff keeping my $100K salary, will I be better off?
Yes. If you keep earning $100K after moving to Flagstaff, you'd have $158 more per month after core expenses — because Flagstaff is cheaper than Boise.
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 × (102 ÷ 105) = $97,143. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Boise to Flagstaff
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only