Retire Modestly in Koh Samui, TH (2026)
Small apartment, cook at home, public transit, minimal travel. In Koh Samui (COL 50), this costs $1,333/month — a $16K less than the US average.
Monthly budget breakdown
Estimated monthly expenses for a modest retirement in Koh Samui (COL-adjusted from national baseline).
| Category | Monthly | Annual | % of budget |
|---|---|---|---|
| Housing | $440 | $5,280 | 33% |
| Food | $200 | $2,400 | 15% |
| Healthcare | $187 | $2,244 | 14% |
| Transport | $160 | $1,920 | 12% |
| Leisure | $187 | $2,244 | 14% |
| Misc | $160 | $1,920 | 12% |
| Total | $1,333 | $16,000 | 100% |
How long to save $400K?
Time to reach your nest egg target investing at 7% annual return (S&P 500 historical avg).
| Monthly savings | Years to retire | Retirement age (start 30) |
|---|---|---|
| $1,000/mo | 18 yrs | Age 48 |
| $2,000/mo | 12 yrs | Age 42 |
| $3,000/mo | 9 yrs | Age 39 |
| $5,000/mo | 6 yrs | Age 36 |
| $8,000/mo | 4 yrs | Age 34 |
Koh Samui vs US average — Modest retirement
Other retirement tiers in Koh Samui
Frequently asked questions
How much does a modest retirement cost in Koh Samui?
A modest retirement in Koh Samui costs approximately $16,000/year or $1,333/month — based on a 50 cost-of-living index (US avg = 100). Using the 4% safe withdrawal rule, you need a nest egg of about $400K.
How long will it take to save $400K for retirement in Koh Samui?
Saving $2,000/month at a 7% average annual return would take roughly 12 years to accumulate $400K. At $3,000/month, it would take about 9 years. These estimates assume consistent investing in a diversified portfolio.
What is the biggest expense in a modest retirement in Koh Samui?
Housing is the largest expense at roughly 33% of the budget ($440/month). Healthcare ($187/month) is the second-largest category. TH has no state income tax, which reduces your overall tax burden in retirement.
4% safe withdrawal rule · 7% annualized return assumption · COL-adjusted from BLS data · Q1 2026 estimates