Can I Afford to Live in Idaho Falls vs Naperville on $120K?
Here's how a $120K/year salary plays out in both cities after taxes, rent, and core living expenses — based on Q1 2026 data.
Monthly budget breakdown
| Expense | Idaho Falls ID | Naperville IL |
|---|---|---|
| Monthly take-home (est.) | $6,575 | $6,655 |
| 1BR rent | $1,100 | $1,650 |
| Groceries (est.) | $365 | $380 |
| Transport (est.) | $35 | $72 |
| Utilities | $142 | $158 |
| Internet | $65 | $62 |
| Left after essentials | $4,868/month | $4,333/month |
Frequently asked questions
Is $120K a good salary in Idaho Falls?
At $120K/year in Idaho Falls, your estimated monthly take-home is $6,575. With 1BR rent around $1,100/month, rent takes up 17% of your take-home. That's considered very comfortable.
Is $120K a good salary in Naperville?
At $120K/year in Naperville, your estimated monthly take-home is $6,655. With 1BR rent around $1,650/month, rent takes up 25% of your take-home. That's considered comfortable.
Which city is more affordable on a $120K salary?
Idaho Falls leaves you with more money after core expenses — $4,868/month vs $4,333/month in Naperville.
Can I afford to live alone in Idaho Falls on $120K?
Yes. At $120K in Idaho Falls, rent takes 17% of your take-home, leaving $4,868/month after essentials. Most financial planners recommend keeping rent below 30%.
See the full cost-of-living comparison
Rent, groceries, taxes, transportation, and more — side by side.
Take-home estimates use simplified federal/state brackets and do not account for pre-tax deductions, 401(k), or local taxes. Data: Zillow, BLS, Numbeo · Q1 2026 · For general guidance only