Can I Afford to Live in Rockford vs Cartagena 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.

Rockford, IL
$2,562/mo take-home
Rent: $1,050/mo (41% of take-home)
Tight
Cartagena, CO
$2,728/mo take-home
Rent: $560/mo (21% of take-home)
Very comfortable
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Monthly budget breakdown

Rockford
IL
Cartagena
CO
Monthly take-home (est.)
$2,562
$2,728Best ✓
1BR rent
$1,050
$560Best ✓
Groceries (est.)
$357Best ✓
$380
Transport (est.)
$50Best ✓
$150
Utilities
$158
$70Best ✓
Internet
$58
$30Best ✓
Left after essentials
$889/month
$1,538/month
Cartagena (Bolívar) has no state income tax, boosting take-home vs Rockford (IL rate: 5%).

Frequently asked questions

Is $40K a good salary in Rockford?

At $40K/year in Rockford, your estimated monthly take-home is $2,562. With 1BR rent around $1,050/month, rent takes up 41% of your take-home. That's considered tight.

Is $40K a good salary in Cartagena?

At $40K/year in Cartagena, your estimated monthly take-home is $2,728. With 1BR rent around $560/month, rent takes up 21% of your take-home. That's considered very comfortable.

Which city is more affordable on a $40K salary?

Cartagena leaves you with more money after core expenses — $1,538/month vs $889/month in Rockford.

Can I afford to live alone in Rockford on $40K?

It's tight. Rent in Rockford would take 41% of your $40K take-home pay. You may need to find roommates or look at studios to stay within the 30% rule.

Compare other salary bands — Rockford vs Cartagena

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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