Can I Afford to Live in Koh Samui vs St. Louis 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.
Monthly budget breakdown
| Expense | Koh Samui TH | St. Louis MO |
|---|---|---|
| Monthly take-home (est.) | $2,728 | $2,572 |
| 1BR rent | $620 | $1,300 |
| Groceries (est.) | $380 | $369 |
| Transport (est.) | $150 | $75 |
| Utilities | $70 | $162 |
| Internet | $28 | $60 |
| Left after essentials | $1,480/month | $606/month |
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 St. Louis?
At $40K/year in St. Louis, your estimated monthly take-home is $2,572. With 1BR rent around $1,300/month, rent takes up 51% 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 $606/month in St. Louis.
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%.
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