Can I Afford to Live in Rockford vs Naperville on $100K?
Here's how a $100K/year salary plays out in both cities after taxes, rent, and core living expenses — based on Q1 2026 data.
Monthly budget breakdown
| Expense | Rockford IL | Naperville IL |
|---|---|---|
| Monthly take-home (est.) | $5,904 | $5,904 |
| 1BR rent | $1,050 | $1,650 |
| Groceries (est.) | $357 | $380 |
| Transport (est.) | $50 | $72 |
| Utilities | $158 | $158 |
| Internet | $58 | $62 |
| Left after essentials | $4,231/month | $3,582/month |
Frequently asked questions
Is $100K a good salary in Rockford?
At $100K/year in Rockford, your estimated monthly take-home is $5,904. With 1BR rent around $1,050/month, rent takes up 18% of your take-home. That's considered very comfortable.
Is $100K a good salary in Naperville?
At $100K/year in Naperville, your estimated monthly take-home is $5,904. With 1BR rent around $1,650/month, rent takes up 28% of your take-home. That's considered comfortable.
Which city is more affordable on a $100K salary?
Rockford leaves you with more money after core expenses — $4,231/month vs $3,582/month in Naperville.
Can I afford to live alone in Rockford on $100K?
Yes. At $100K in Rockford, rent takes 18% of your take-home, leaving $4,231/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