Can I Afford to Live in Idaho Falls vs Santiago on $120K?

Here's how a $120K/year salary plays out in both cities after taxes, rent, and core living expenses — based on Q1 2026 data.

Idaho Falls, ID
$6,575/mo take-home
Rent: $1,100/mo (17% of take-home)
Very comfortable
Santiago, CL
$7,155/mo take-home
Rent: $800/mo (11% of take-home)
Very comfortable

Monthly budget breakdown

Idaho Falls
ID
Santiago
CL
Monthly take-home (est.)
$6,575
$7,155Best ✓
1BR rent
$1,100
$800Best ✓
Groceries (est.)
$365Best ✓
$380
Transport (est.)
$35Best ✓
$150
Utilities
$142
$95Best ✓
Internet
$65
$35Best ✓
Left after essentials
$4,868/month
$5,695/month
Santiago (Santiago Metropolitan) has no state income tax, boosting take-home vs Idaho Falls (ID rate: 5.8%).

Frequently asked questions

Is $120K a good salary in Idaho Falls?

At $120K/year in Idaho Falls, your estimated monthly take-home is $6,575. With 1BR rent around $1,100/month, rent takes up 17% of your take-home. That's considered very comfortable.

Is $120K a good salary in Santiago?

At $120K/year in Santiago, your estimated monthly take-home is $7,155. With 1BR rent around $800/month, rent takes up 11% of your take-home. That's considered very comfortable.

Which city is more affordable on a $120K salary?

Santiago leaves you with more money after core expenses — $5,695/month vs $4,868/month in Idaho Falls.

Can I afford to live alone in Idaho Falls on $120K?

Yes. At $120K in Idaho Falls, rent takes 17% of your take-home, leaving $4,868/month after essentials. Most financial planners recommend keeping rent below 30%.

Compare other salary bands — Idaho Falls vs Santiago

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See the full cost-of-living comparison

Rent, groceries, taxes, transportation, and more — side by side.

Full comparison

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