Living cost comparison Koh Samui 2026 – If you’re planning to relocate or invest in a Southeast Asian island, understanding the day‑to‑day expenses is as critical as the purchase price of a villa. In 2026, foreign‑based retirees and digital nomads typically see monthly budgets ranging from THB 60,000–120,000 (approx. $1,800–$3,600) on Koh Samui, IDR 15,000,000–30,000,000 (approx. $970–$1,940) in Bali, and THB 70,000–130,000 (approx. $2,060–$3,830) in Phuket. Below we break down housing, utilities, food, transport and lifestyle costs, helping you decide which island fits your financial profile.
1. Housing – Rental & Purchase Options
1.1. Rental Market Snapshot
| Area | 1‑Bedroom Apartment (City Centre) | 1‑Bedroom Apartment (Outside Centre) | 3‑Bedroom Villa (Beachfront) |
|---|---|---|---|
| Koh Samui | THB 30,000 (approx. $882) per month | THB 20,000 (approx. $588) per month | THB 120,000 (approx. $3,530) per month |
| Bali (Seminyak) | IDR 8,500,000 (approx. $970) per month | IDR 5,500,000 (approx. $630) per month | IDR 35,000,000 (approx. $4,020) per month |
| Phuket (Patong) | THB 35,000 (approx. $1,030) per month | THB 22,000 (approx. $647) per month | THB 150,000 (approx. $4,410) per month |
Rental prices fluctuate with seasonality; peak tourist months (Dec‑Feb) can add 15‑20 % to rates.
1.2. Buying a Villa – Price per Square Metre
| Area | Price / m² (THB) | Approx. Price / m² (USD) |
|---|---|---|
| Koh Samui – Bophut | THB 180,000 (approx. $5,300) | $5,300 |
| Koh Samui – Maenam | THB 140,000 (approx. $4,120) | $4,120 |
| Bali – Canggu | IDR 38,000,000 (approx. $1,120) | $1,120 |
| Phuket – Kamala | THB 210,000 (approx. $6,180) | $6,180 |
Buying power varies because exchange rates differ (1 USD ≈ 34 THB, 1 USD ≈ 15,200 IDR). Consider the long‑term appreciation trends discussed in our market‑trend guides.
2. Utilities – Electricity, Water & Internet
| Utility | Koh Samui (Monthly) | Bali (Monthly) | Phuket (Monthly) |
|---|---|---|---|
| Electricity (150 kWh) | THB 2,800 (approx. $82) | IDR 600,000 (approx. $39) | THB 3,200 (approx. $94) |
| Water | THB 400 (approx. $12) | IDR 120,000 (approx. $8) | THB 500 (approx. $15) |
| High‑speed Internet (30 Mbps) | THB 1,200 (approx. $35) | IDR 350,000 (approx. $23) | THB 1,400 (approx. $41) |
Utilities in Koh Samui are slightly higher than Bali due to the reliance on diesel generators during peak demand, but still lower than Phuket’s tourist‑driven rates.
3. Food & Groceries
3.1. Everyday Groceries (Monthly Basket for One Person)
| Item | Koh Samui (THB) | Bali (IDR) | Phuket (THB) |
|---|---|---|---|
| Rice (20 kg) | 560 (approx. $16) | 150,000 (approx. $10) | 620 (approx. $18) |
| Chicken Breast (1 kg) | 180 (approx. $5) | 60,000 (approx. $4) | 190 (approx. $6) |
| Local Vegetables (1 kg) | 70 (approx. $2) | 30,000 (approx. $2) | 80 (approx. $2) |
| Imported Milk (1 L) | 70 (approx. $2) | 30,000 (approx. $2) | 75 (approx. $2) |
3.2. Eating Out – Mid‑Range Restaurant Meal
- Koh Samui: THB 350 (approx. $10)
- Bali: IDR 120,000 (approx. $8)
- Phuket: THB 380 (approx. $11)
4. Transportation
| Mode | Koh Samui (Monthly) | Bali (Monthly) | Phuket (Monthly) |
|---|---|---|---|
| Scooter Rental | THB 3,500 (approx. $103) | IDR 650,000 (approx. $43) | THB 4,000 (approx. $118) |
| Car Rental (Compact) | THB 15,000 (approx. $441) | IDR 2,800,000 (approx. $185) | THB 18,000 (approx. $530) |
| Fuel (Petrol, per litre) | THB 38 (approx. $1.12) | IDR 13,500 (approx. $0.89) | THB 45 (approx. $1.32) |
Motorbike commuting remains the most cost‑effective way to get around any of the three islands, especially for daily errands and beach trips.
5. Lifestyle & Miscellaneous Expenses
| Category | Koh Samui | Bali | Phuket |
|---|---|---|---|
| Fitness Club (Monthly) | THB 2,200 (approx. $65) | IDR 550,000 (approx. $36) | THB 2,500 (approx. $74) |
| Co‑working Space (Hot Desk) | THB 5,000 (approx. $147) | IDR 1,200,000 (approx. $78) | THB 5,500 (approx. $162) |
| International School (Primary) | THB 250,000 (approx. $7,350) | IDR 120,000,000 (approx. $7,900) | THB 270,000 (approx. $7,940) |
| Healthcare (Private GP Visit) | THB 1,500 (approx. $44) | IDR 400,000 (approx. $26) | THB 2,000 (approx. $59) |
While Bali often offers the lowest price points for co‑working and fitness, Koh Samui’s expat‑focused facilities provide a more English‑speaking environment, which many retirees appreciate.
6. What Your Total Monthly Budget Looks Like
| Lifestyle Level | Koh Samui (THB) | Bali (IDR) | Phuket (THB) |
|---|---|---|---|
| Frugal (local food, scooter) | 55,000–70,000 (approx. $1,620–$2,060) | 12,000,000–15,000,000 (approx. $790–$990) | 65,000–80,000 (approx. $1,910–$2,350) |
| Mid‑Range (mixed dining, occasional car) | 95,000–115,000 (approx. $2,800–$3,380) | 20,000,000–25,000,000 (approx. $1,320–$1,650) | 110,000–130,000 (approx. $3,240–$3,830) |
| Premium (expat school, gym, car) | 170,000–210,000 (approx. $5,000–$6,180) | 35,000,000–45,000,000 (approx. $2,300–$2,970) | 200,000–260,000 (approx. $5,880–$7,640) |
These figures assume a single adult; families will naturally see higher totals, especially in the education and housing columns.
7. How to Choose the Best Island for Your Budget
7.1. Prioritise Lifestyle Over Pure Cost
- Koh Samui offers a balanced mix of Western‑style amenities, reliable healthcare and a growing expat community. It’s ideal for retirees who value comfort and a quieter pace.
- Bali remains the most affordable for digital nomads focused on low‑cost co‑working and a vibrant cultural scene.
- Phuket commands a higher price tag but delivers superior infrastructure, international schools and a bustling tourism economy that can boost rental returns.
7.2. Consider Currency Exposure
If your income is in USD, the Thai baht’s relative stability (average 1 USD ≈ 34 THB in 2026) provides predictable budgeting, whereas the Indonesian rupiah’s volatility may affect long‑term cost calculations.
7.3. Factor in Future Appreciation
Our recent market‑trend analysis shows Koh Samui’s north‑east (Choeng Mon, Bophut) averaging 5‑7 % annual price growth, while Bali’s inland areas lag at 3‑4 %. Phuket’s luxury beachfront is seeing 6‑8 % growth, but with higher entry costs.
8. Practical Steps for a Smooth Relocation
- Open a local bank account – Follow our guide on setting up a Thai bank account for property purchases.
- Secure a short‑term rental – Allows you to test the island before committing to a villa purchase.
- Engage a bilingual property lawyer – Essential for title verification and lease agreements.
- Budget for upfront fees – Expect 2‑3 % of the purchase price for transfer taxes, legal fees and registration.
- Plan healthcare – Register with a private clinic early; many expats opt for international health insurance covering Thailand and Indonesia.
Ready to compare properties with your budget in mind? Contact the Buy Samui Villas team to arrange a private viewing or a virtual tour of villas that match your financial profile.
This article is for informational purposes only and does not constitute legal or financial advice. Always consult a qualified Thai property lawyer before making any investment decisions.