Moving from Rapid City to Koh Samui (2026)
Koh Samui has a COL index of 50 vs 88 for Rapid City (100 = US average). You'd pay about 43% less for the same lifestyle.
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Key differences
Salary needed in Koh Samui to match your Rapid City lifestyle
Based on the 43% cost of living decrease between the two cities.
| Your salary in Rapid City | Equivalent in Koh Samui |
|---|---|
| $40K | $22,727 |
| $50K | $28,409 |
| $60K | $34,091 |
| $75K | $42,614 |
| $80K | $45,455 |
| $100K | $56,818 |
| $120K | $68,182 |
| $150K | $85,227 |
💵 Household income (before tax)
Monthly budget at $75K — Rapid City vs Koh Samui
| Expense | Rapid City | Koh Samui |
|---|---|---|
| Monthly take-home | $4,741 | $4,741 |
| 1BR rent | $1,200 | $620 |
| Groceries | $365 | $380 |
| Transport | $40 | $150 |
| Utilities | $148 | $70 |
| Internet | $65 | $28 |
| Left after essentials | $2,923 | $3,493 |
30-Year Wealth Builder
If you invest your monthly savings of $570 in a low-cost index fund (7% avg return), you'd accumulate an extra:
over 30 years compared to staying in Rapid City — that's the real price of a city.
Frequently asked questions
Is Koh Samui cheaper than Rapid City?
Yes. Koh Samui has a cost of living index of 50 vs 88 for Rapid City (100 = US average). That's about 43% cheaper.
How much will I save moving from Rapid City to Koh Samui?
On a $75K salary, moving from Rapid City to Koh Samui saves roughly $580/month on core expenses. That's ~$6,960/year.
What salary do I need in Koh Samui to match my Rapid City lifestyle?
To maintain the same purchasing power as $75,000 in Rapid City, you'd need roughly $42,614/year in Koh Samui. This is based on the overall COL index difference.
Estimates based on Q1 2026 COL index and market data. Budget uses simplified federal/state tax rates. Zillow · BLS · Numbeo · For general guidance only