San Diego vs Koh Samui for Retirees (2026)
Scroll down for retirement income tax breakdown, healthcare estimates, and FAQ.
Your move simulator
Slide to match your household — estimates combine take-home, rent, and groceries.
Estimated annual swing
−$29,580/yr
Favoring Koh Samui for this income & household (illustrative).
With the extra $2,465/mo, you could pay down a $15,000 card balance in ~7 months and still keep ~$296/mo for dining out.
Complete the Picture
While you’re comparing — don’t leave money on the table.
High-yield savings
Park ~$29,580/yr savings at 4–5%+ APY
Even $2,465/mo extra earns meaningfully at 4–5% APY vs near-zero in checking.
Home + auto bundle
New state — compare rates before you sign
Moving to Koh Samui resets your insurance profile. Bundling home + auto often saves 15–25%.
Supplemental health
Koh Samui's lower taxes leave ~$5,388/yr more for healthcare
Health coverage varies by state. Review Medigap plans available in your new zip before moving.
Full retirement cost breakdown
| Metric | San Diego California | Koh Samui Surat Thani Province | Your impact |
|---|---|---|---|
| 1BR rent / month | $2,600 | $620Better | $23,760/yr saves in Koh |
| Median home price | $850K | — | — |
| State income tax | 9.3% | NoneBetter | $6,975/yr saves in Koh |
| Sales tax (combined) | 7.8% | 7%Better | — |
| Monthly utilities | $130 | $70Better | $720/yr saves in Koh |
| Groceries index (US = 100) | 109 | — | — |
| Est. healthcare / month | $740 | $250Better | $5,880/yr saves in Koh |
| Walk score (0–100) | 51 / 100Better | 35 / 100 | — |
| Overall COL index (100 = US avg) | 148 | 50Better | — |
Your biggest money opportunities based on this comparison.
Retirement tax savings
Koh Samui saves ~$388/mo on a $50K retirement income
Keep more of your fixed income. Park the tax savings in a high-yield account to let it compound.
Healthcare savings
Koh Samui saves ~$490/mo on healthcare
Compare Medicare supplement and insurance plans to cover what Medicare doesn't pay.
More to invest
Koh Samui stretches your retirement savings ~66% further
Lower COL means more of your nest egg stays invested. Compare brokerage and IRA accounts.
Complete the Picture
While you’re comparing — don’t leave money on the table.
Mortgages
See what you can afford in Koh Samui
Compare rates from top lenders before your move — pre-approval is free and won't affect your score.
Home & Auto Insurance
Bundle before you move — save 15–25%
New state means new rates. Lock in Koh Samui homeowners + auto quotes before your move date.
Moving Rewards Card
Turn closing costs & moving expenses into cash back
Average family spends $6,200 on a move. These cards pay 2–4% back + 0% intro APR on purchases.
Frequently asked questions
Which city is better for retirement — San Diego or Koh Samui?
Based on home prices, taxes on retirement income, walkability, and overall cost of living, Koh Samui scores better for retirees. Koh Samui is approximately 66% cheaper overall. The best choice still depends on climate, healthcare access, and proximity to family.
Is retirement income taxed in San Diego or Koh Samui?
Surat Thani Province has no state income tax, meaning Social Security, pension, and retirement account withdrawals are not subject to state tax. California has a 9.3% state income tax rate. For retirees, this difference can save thousands annually.
What is the estimated monthly healthcare cost in San Diego vs Koh Samui?
Based on national average retiree healthcare spending (~$500/month) scaled by each city's cost-of-living index, estimated monthly healthcare costs are approximately $740 in San Diego and $250 in Koh Samui. That's a difference of ~$490/month, or ~$5,880/year. Actual costs vary based on your Medicare plan, supplements, and health needs.
Can I afford to retire in San Diego on a $50,000 annual income?
On a $50,000/year ($4,167/month) retirement income in San Diego, rent alone would consume approximately 62% of your budget (1BR rent ~$2,600/mo) and healthcare another ~18%. That leaves roughly 20% (~$833/mo) for groceries, transportation, and other expenses. This is tight — a studio apartment or lower-cost neighborhood would help.
Which city is more walkable for retirees?
San Diego has a higher walk score (51 vs 35 out of 100). Walkability is increasingly important for retirees who want to reduce car dependence — a score above 70 means most daily errands can be done on foot. San Diego offers more independence without a car, which also reduces transportation costs.
$50K/year in San Diego has the same purchasing power as $17K/year in Koh Samui
Healthcare estimates based on national avg retiree spending (~$500/mo) scaled by COL index · State income tax rates from Tax Foundation · Data: Zillow, BLS, Numbeo · Q1 2026