Can I Afford to Live in San Jose 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 | San Jose CA | Naperville IL |
|---|---|---|
| Monthly take-home (est.) | $5,546 | $5,904 |
| 1BR rent | $3,000 | $1,650 |
| Groceries (est.) | $437 | $380 |
| Transport (est.) | $100 | $72 |
| Utilities | $150 | $158 |
| Internet | $70 | $62 |
| Left after essentials | $1,789/month | $3,582/month |
Frequently asked questions
Is $100K a good salary in San Jose?
At $100K/year in San Jose, your estimated monthly take-home is $5,546. With 1BR rent around $3,000/month, rent takes up 54% of your take-home. That's considered difficult.
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?
Naperville leaves you with more money after core expenses — $3,582/month vs $1,789/month in San Jose.
Can I afford to live alone in San Jose on $100K?
It's tight. Rent in San Jose would take 54% of your $100K take-home pay. You may need to find roommates or look at studios to stay within the 30% rule.
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