Can I Afford to Live in Idaho Falls vs Sioux Falls 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 | Idaho Falls ID | Sioux Falls SD |
|---|---|---|
| Monthly take-home (est.) | $5,838 | $6,321 |
| 1BR rent | $1,100 | $1,250 |
| Groceries (est.) | $365 | $365 |
| Transport (est.) | $35 | $42 |
| Utilities | $142 | $155 |
| Internet | $65 | $60 |
| Left after essentials | $4,131/month | $4,449/month |
Frequently asked questions
Is $100K a good salary in Idaho Falls?
At $100K/year in Idaho Falls, your estimated monthly take-home is $5,838. With 1BR rent around $1,100/month, rent takes up 19% of your take-home. That's considered very comfortable.
Is $100K a good salary in Sioux Falls?
At $100K/year in Sioux Falls, your estimated monthly take-home is $6,321. With 1BR rent around $1,250/month, rent takes up 20% of your take-home. That's considered very comfortable.
Which city is more affordable on a $100K salary?
Sioux Falls leaves you with more money after core expenses — $4,449/month vs $4,131/month in Idaho Falls.
Can I afford to live alone in Idaho Falls on $100K?
Yes. At $100K in Idaho Falls, rent takes 19% of your take-home, leaving $4,131/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