Average gross holiday rental income for a pool villa on Koh Samui ran between 5,800 and 14,500 THB per night during the 2025/2026 season, based on our estimates, depending on district and property grade. That spread alone signals that Koh Samui is not a single, uniform market. Our analysts have tracked project completions and occupancy data for several years and observe clear divergence between districts in terms of viable rental models.
The central question for any investor is whether those nightly rates translate into real net returns after operating costs, taxes, and the island's structural infrastructure constraints are factored in. Below we work through the numbers district by district.
Quick answer
- Short-term rental occupancy on Koh Samui in 2025 ranged from 55% to 78% depending on district and season (booking-platform data, Q4 2025)
- A 2-3 bedroom pool villa in the 8-15 million THB segment generates gross annual income of roughly 1.4-2.8 million THB at 65-75% occupancy, based on our estimates
- Freehold condos (entry point 3-6 million THB) produce lower gross income - 250,000-500,000 THB per year - but carry lower operating costs
- Villa operating costs consume 30-42% of gross income (management, pool and garden upkeep, electricity, water, repairs)
- Samui Airport (USM), served exclusively by one carrier (Bangkok Airways), handles approximately 1.2 million passengers per year as of 2026 - a hard ceiling on tourism demand that is unique to this island
- Investors converting returns to other currencies should note that exchange-rate movement adds a layer of financial risk that our analysts track separately from yield calculations
Options and scenarios
Scenario A - Conservative (occupancy falls to 55%): if occupancy on a Bophut villa drops to 55%, gross income falls to roughly 1.9 million THB and estimated net yield to approximately 8.5%. This scenario is plausible in the event of a global tourism slowdown or further ticket-price increases by the sole airport carrier.
Scenario B - Base case (65% occupancy): this is the calculation set out in the worked examples below, calibrated on 2024/2025 season data. It assumes no change in airport capacity and a stable operating environment.
Scenario C - Optimistic (airport opens to additional carriers): there has been long-running speculation about a second runway or competitive airline access. If that were to materialise, we would estimate an 8-12 percentage-point lift in occupancy and a 10-15% rise in nightly rates within two to three years. As of 2026 we see no firm delivery timeline for either development.
Bophut and Fisherman's Village - boutique premium segment
Bophut draws guests seeking a boutique atmosphere. Fisherman's Village is the only district on the island with a genuine pedestrian street, which supports premium positioning. Peak-season nightly rates (December-March) for a sea-view three-bedroom villa reach 12,000-14,500 THB. In the shoulder and low season (May-October) rates settle at 6,500-8,000 THB. We estimate annual occupancy in this segment at 62-68%.
Land in Bophut is among the most expensive on the island at 25,000-45,000 THB per rai as of early 2026. A 30-year leasehold with renewal options registered at the Land Office is the dominant ownership structure for foreign buyers.
Maenam - extended-stay and family segment
Maenam attracts families and medium-term renters (stays of one to three months). Nightly rates for a two-bedroom villa sit at 5,800-8,500 THB. Annual occupancy is lower than Bophut at an estimated 55-63%, but the rental calendar is more evenly distributed thanks to workation-style demand. Land costs are notably lower at 12,000-22,000 THB per rai.
Lamai - mid-market with diverse demand drivers
Lamai has the widest spread of product on the island, ranging from villas priced around 6 million THB to resort-style condo developments. Short-term villa rates run 7,000-11,000 THB per night with occupancy of 60-70%. Proximity to inland attractions such as the Na Muang waterfalls and viewpoint roads provides a degree of demand stability that is less dependent on beach conditions alone.
Chaweng - high rotation, shorter stays
Chaweng is the island's main entertainment and tourism hub. The dominant rental pattern here is high guest rotation, with average stays of 3-5 nights compared to 7-12 nights in Bophut. One-bedroom condos in Chaweng generate 800-1,800 THB per night at peak occupancy rates of 72-78% - the highest on the island. However, nightly revenue per square metre remains below the villa premium segment.
Worked example 1: Three-bedroom pool villa in Bophut, purchase price 12 million THB
- Gross annual income: average rate 9,500 THB/night x 237 nights (65% occupancy) = 2,251,500 THB
- Operating costs (38%): property management 15-18%, pool and garden 5%, electricity and water 4-6%, minor repairs 3%, booking platforms and marketing 8-10% = approximately 855,570 THB
- Net income before tax: approximately 1,395,930 THB
- Estimated net yield: 11.6% on purchase price
- Note: this calculation excludes building depreciation, Thai personal income tax (progressive rates 0-35% for tax residents), and leasehold structure costs
Worked example 2: One-bedroom freehold condo in Chaweng, purchase price 4 million THB
- Gross annual income: average rate 1,200 THB/night x 255 nights (70% occupancy) = 306,000 THB
- Operating costs (28%): common area maintenance (CAM) 4-6%, rental management 15-18%, electricity and water 3%, repairs 2% = approximately 85,680 THB
- Net income before tax: approximately 220,320 THB
- Estimated net yield: 5.5% on purchase price
The pattern is clear: villas deliver higher absolute and percentage returns but require a larger capital commitment and more intensive management. Condos offer a simpler legal structure (freehold title available within the 49% foreign quota), easier resale, and lower management burden, but at a materially lower yield.
Comparison table
| Parameter | Villa - Bophut (premium) | Villa - Maenam (family) | Condo - Chaweng (high rotation) | Condo - Lamai (mixed) |
|---|---|---|---|---|
| Typical purchase price | 10-18 million THB | 6-12 million THB | 3-6 million THB | 3.5-7 million THB |
| Ownership structure | Leasehold 30 yr / Thai company | Leasehold 30 yr / Thai company | Freehold (49% foreign quota) | Freehold (49% foreign quota) |
| Nightly rate - peak season | 10,000-14,500 THB | 6,500-8,500 THB | 1,200-1,800 THB | 1,000-1,600 THB |
| Nightly rate - low season | 6,500-8,000 THB | 4,000-5,500 THB | 700-1,100 THB | 600-1,000 THB |
| Annual occupancy | 62-68% | 55-63% | 72-78% | 60-70% |
| Operating costs (% of gross) | 35-42% | 30-38% | 25-30% | 25-30% |
| Estimated net yield | 9-12% | 7-10% | 5-7% | 4.5-6.5% |
| Resale liquidity | Low to medium | Low | Medium to high | Medium |
| Primary risk | Maintenance costs, leasehold expiry | Below-average occupancy | Dependence on party-tourism flows | Price competition from new supply |
Infrastructure constraints as a structural factor
Samui Airport (USM) is privately owned and operated by Bangkok Airways, which holds an effective monopoly on air access to the island. Terminal capacity is approximately 36 aircraft movements per day. Return airfares on the Bangkok-Samui route (BKK/DMK to USM) range from 3,500 to 8,500 THB one way - roughly three to four times the cost of a comparable flight to Phuket. For context, Phuket International Airport handles over 10 million passengers per year and maintains direct connections from Europe. That access gap directly shapes the visitor profile and the nightly rates the market can sustain.
Road network: Koh Samui is served by a single ring road (Routes 4169/4170). Congestion through Chaweng and on the Chaweng-to-Bophut corridor at peak season is significant. No bypass road is in planning, as of 2026.
Water and power: water shortages during the dry period (February-April) are a recurring operational issue. Villas with on-site storage tanks and filtration systems carry a meaningful operational advantage. Electricity is supplied via a submarine cable from the mainland and experiences outages two to four times per year on average.
Construction capacity: the pool of qualified building contractors on the island is limited. Based on our 2025 project data, villa construction costs are 15-25% higher on Koh Samui than on Phuket. Turnkey project timelines average 14-20 months, compared with 10-14 months on Phuket.
Risks and mistakes
- Overstating occupancy assumptions: a common error is modelling 80-85% occupancy year-round. In our data sets, annual short-term rental occupancy on Koh Samui rarely exceeds 75%, and in the villa premium segment the realistic ceiling is closer to 68%
- Ignoring seasonal cost spikes: generator fuel during power outages and water deliveries by tanker during the dry season can add 3-5 percentage points to operating costs in affected months
- Leasehold agreements without registered renewal clauses: a leasehold contract that does not have renewal options formally registered at the Land Office carries material title risk at the 30-year mark. Our analysts verify legal structures before making any location recommendation
- Single-carrier dependency: Bangkok Airways controls all scheduled air access to the island. Any significant ticket-price increase translates directly into a reduction in inbound visitor volume and, by extension, rental demand
- Tax residency obligations: investors who maintain tax residency in their home country are typically required to report foreign-sourced rental income under domestic rules. This interacts with any double-taxation agreement Thailand has with the relevant country. We strongly recommend obtaining country-specific tax advice before committing capital
- Developer payment risk: in Thailand there are no escrow arrangements for foreign property buyers. Payments flow directly to the developer, which makes counterparty due diligence a non-negotiable step in any off-plan purchase process
FAQ
What is the realistic net rental yield on Koh Samui in 2026?
Based on our estimates, net yield after operating costs and before tax runs at 5-7% for condos and 8-12% for premium villas in well-located districts such as Bophut and Lamai. The two most influential variables are achieved occupancy and management-fee structure.
Can a foreign buyer purchase a villa on Koh Samui?
Foreigners cannot hold freehold land title in Thailand. Villas are typically acquired via a 30-year leasehold with registered renewal options, or through a Thai company structure with appropriate legal safeguards. Condos can be purchased freehold within the 49% foreign-ownership quota per building.
What does professional villa management cost on Koh Samui?
Management companies typically charge 15-25% of gross rental income. On top of that, owners should budget for pool maintenance (2,000-4,000 THB per month), garden upkeep (1,500-3,000 THB per month), and a rolling repair and replacement reserve.
How does Koh Samui's rental market compare with Phuket?
Phuket airport handles five to eight times more passengers per year, has direct routes from Europe, better road infrastructure, and a larger contractor base. Koh Samui offers a more intimate environment and lower competitive density, but at construction costs that run 15-25% higher and with thinner secondary-market liquidity.
Which district on Koh Samui suits short-term rental best?
Chaweng delivers the highest occupancy rates (72-78%) but lower nightly rates. Bophut produces higher per-night revenue in the premium segment. The optimal district depends on the intended model: high guest rotation (Chaweng) versus higher margin per stay (Bophut).
Does the monsoon season halt rentals on Koh Samui entirely?
No. Koh Samui's main wet season (October-December) differs from Phuket's (May-October). During the months when Phuket's west coast is affected by the southwest monsoon, Koh Samui typically sees moderate conditions and receives guests redirecting from the Andaman side. Off-season occupancy is lower, but we estimate it at 35-50% depending on district, not zero.
What taxes apply to rental income from a Koh Samui property?
In Thailand, rental income is subject to personal income tax at progressive rates of 0-35%. A land and buildings tax of 0.3% of assessed value per year also applies to commercial-use properties. Investors who remain tax residents in their home country must additionally declare this income under domestic rules, with any applicable double-taxation treaty determining the final liability. Tax advice specific to the investor's country of residence is essential.
What is the typical lease structure for foreign villa buyers on Koh Samui?
The standard instrument is a 30-year registered lease (leasehold) with contractual renewal options for a further 30-year term. Registration of the lease at the provincial Land Office is the critical step that provides legal enforceability. Our analysts review lease documents and Land Office registration status as part of any due-diligence process.
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