$80K in Naperville = $71,200 in Billings
Your $80K salary in Naperville (COL 100) has the same purchasing power as $71,200 in Billings (COL 89). Billings is cheaper — your money goes 11% further there.
Budget breakdown — $80K in both cities
What $80K actually buys you in each city after taxes and core expenses.
| Expense | Naperville $80K | Billings $80K (same salary) |
|---|---|---|
| Monthly take-home | $4,723 | $4,603 |
| 1BR rent | $1,650 | $1,200 |
| Groceries | $380 | $369 |
| Transport | $72 | $42 |
| Utilities | $158 | $148 |
| Internet | $62 | $68 |
| Left after essentials | $2,401/month | $2,776/month |
Frequently asked questions
What is $80K in Naperville equivalent to in Billings?
$80K in Naperville (COL index 100) has the same purchasing power as $71,200 in Billings (COL index 89). That's 11% less than your current salary.
If I move from Naperville to Billings keeping my $80K salary, will I be better off?
Yes. If you keep earning $80K after moving to Billings, you'd have $375 more per month after core expenses — because Billings is cheaper than Naperville.
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: $80K × (89 ÷ 100) = $71,200. This adjusts for differences in housing, food, transport, and general cost of living.
Other salary amounts — Naperville to Billings
Equivalency uses overall COL index ratio. Take-home uses simplified federal/state brackets. Zillow · BLS · Numbeo · Q1 2026 · For general guidance only