Can I Afford to Live in Koh Samui vs Boise 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.

Koh Samui, TH
$2,728/mo take-home
Rent: $620/mo (23% of take-home)
Comfortable
Boise, ID
$2,535/mo take-home
Rent: $1,600/mo (63% of take-home)
Difficult

Monthly budget breakdown

Expense
Koh Samui
TH
Boise
ID
Monthly take-home (est.)$2,728$2,535
1BR rent$620$1,600
Groceries (est.)$380$372
Transport (est.)$150$45
Utilities$70$145
Internet$28$60
Left after essentials$1,480/month$313/month
Koh Samui (Surat Thani Province) has no state income tax, boosting take-home vs Boise (ID rate: 5.8%).

Frequently asked questions

Is $40K a good salary in Koh Samui?

At $40K/year in Koh Samui, your estimated monthly take-home is $2,728. With 1BR rent around $620/month, rent takes up 23% of your take-home. That's considered comfortable.

Is $40K a good salary in Boise?

At $40K/year in Boise, your estimated monthly take-home is $2,535. With 1BR rent around $1,600/month, rent takes up 63% of your take-home. That's considered difficult.

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

Koh Samui leaves you with more money after core expenses — $1,480/month vs $313/month in Boise.

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

Yes. At $40K in Koh Samui, rent takes 23% of your take-home, leaving $1,480/month after essentials. Most financial planners recommend keeping rent below 30%.

Compare other salary bands — Koh Samui vs Boise

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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