Can I Afford to Live in Washington vs Idaho 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 | Washington DC | Idaho Falls ID |
|---|---|---|
| Monthly take-home (est.) | $5,838 | $5,838 |
| 1BR rent | $3,100 | $1,100 |
| Groceries (est.) | $422 | $365 |
| Transport (est.) | $100 | $35 |
| Utilities | $190 | $142 |
| Internet | $75 | $65 |
| Left after essentials | $1,951/month | $4,131/month |
Frequently asked questions
Is $100K a good salary in Washington?
At $100K/year in Washington, your estimated monthly take-home is $5,838. With 1BR rent around $3,100/month, rent takes up 53% of your take-home. That's considered difficult.
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.
Which city is more affordable on a $100K salary?
Idaho Falls leaves you with more money after core expenses — $4,131/month vs $1,951/month in Washington.
Can I afford to live alone in Washington on $100K?
It's tight. Rent in Washington would take 53% 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