Can I Afford to Live in San Antonio vs Idaho Falls on $40K?
Here's how a $40K/year salary plays out in both cities after taxes, rent, and core living expenses — based on Q1 2026 data.
Monthly budget breakdown
| Expense | San Antonio TX | Idaho Falls ID |
|---|---|---|
| Monthly take-home (est.) | $2,728 | $2,535 |
| 1BR rent | $1,100 | $1,100 |
| Groceries (est.) | $353 | $365 |
| Transport (est.) | $48 | $35 |
| Utilities | $175 | $142 |
| Internet | $60 | $65 |
| Left after essentials | $992/month | $828/month |
Frequently asked questions
Is $40K a good salary in San Antonio?
At $40K/year in San Antonio, your estimated monthly take-home is $2,728. With 1BR rent around $1,100/month, rent takes up 40% of your take-home. That's considered tight.
Is $40K a good salary in Idaho Falls?
At $40K/year in Idaho Falls, your estimated monthly take-home is $2,535. With 1BR rent around $1,100/month, rent takes up 43% of your take-home. That's considered tight.
Which city is more affordable on a $40K salary?
San Antonio leaves you with more money after core expenses — $992/month vs $828/month in Idaho Falls.
Can I afford to live alone in San Antonio on $40K?
It's tight. Rent in San Antonio would take 40% of your $40K 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