Phuket vs Koh Samui: ROI, Prices and Exit Strategy for Investors in 2026

If you are comparing Phuket and Koh Samui as investment destinations, you are already asking the right question. Most buyers arrive in Thailand with a lifestyle preference and retrofit an investment rationale around it. Serious investors do the opposite: they look at the numbers first, then decide where to allocate capital.

This article gives you both. We cover rental yields, price per square metre, occupancy patterns, ownership structures, capital appreciation potential and – critically – exit strategy. Because how you get out of a market matters just as much as how you get in.

The Two Markets at a Glance

Phuket is Thailand's largest island and its most established international real estate market. It receives roughly 10 to 14 million tourists per year, has a functioning international airport with direct flights from Europe, the Middle East and across Asia, and has seen consistent developer activity for over two decades. Supply is high, demand is high and the market is relatively liquid by Thai standards.

Koh Samui is smaller, more exclusive and structurally different. Tourism numbers are lower, the island airport is privately operated and handles fewer international routes, and the overall property market is thinner. Inventory is more limited, but so is buyer depth when it comes time to sell.

These structural differences flow directly into yield profiles, price points and exit dynamics.

Entry Prices: Where Can You Get In and at What Cost?

In Phuket, condominium prices in 2026 range broadly from around 80,000 to 180,000 THB per square metre depending on location and finish level. Areas like Rawai, Chalong and parts of Patong sit at the lower end. Bang Tao, Laguna and Layan command premium pricing, as do beachfront or sea-view positions in Kamala and Surin. A well-positioned studio or one-bedroom unit suitable for short-term rental can be acquired from approximately 4 to 7 million THB, with branded residences and pool villas commanding significantly more.

Koh Samui entry prices are broadly comparable for condominiums but the product mix is different. The island has far fewer large condominium developments and a greater concentration of villas and boutique pool villa projects. Entry-level villa investments start around 6 to 10 million THB for a basic two-bedroom product, with premium hillside or beachfront villas exceeding 20 to 40 million THB. Because there are fewer comparable transactions, valuations can be less transparent.

For investors with a budget of 200,000 to 400,000 EUR, Phuket offers more standardised product and easier due diligence. Koh Samui makes more sense at higher budget levels where exclusivity and a differentiated rental product justify the premium.

Rental Yields: The Real Numbers

Gross rental yields in Thailand are often overstated by developers and agents. The figures below reflect realistic market performance rather than best-case projections.

In Phuket, a well-managed condominium in a strong short-term rental location – Bang Tao, Kamala or central Patong – achieves gross yields of 7 to 10 percent annually. This assumes active management, consistent Airbnb or Booking.com distribution, and occupancy rates between 65 and 80 percent across the year. Properties with hotel-managed rental programmes typically yield 6 to 8 percent gross with lower management burden but less upside control.

Net yields after management fees, platform commissions, maintenance and Thai property taxes typically land between 5 and 7 percent for well-run Phuket units. This is a realistic benchmark for planning purposes.

Koh Samui yields are more variable. In peak season – roughly November to April – a premium villa can achieve exceptional nightly rates. The problem is seasonality. The island's wet season is longer and more disruptive than Phuket's, concentrated in the October to December period but extending into shoulder months. Annual occupancy for a mid-market villa typically runs 50 to 65 percent, which compresses annual yield. Gross yields of 6 to 9 percent are achievable on the right product in the right location, but the variance is wider and depends heavily on the quality of the rental operation.

For a deeper breakdown of the best areas for rental investment in each island, see our guide to the best areas to buy property in Phuket in 2026 and the best areas to buy property in Koh Samui in 2026.

Seasonality and Occupancy Patterns

This is where the two islands diverge most sharply in ways that matter to investors.

Phuket has two distinct seasons. High season runs roughly November to April, with peak demand in December and January. Low season brings the southwest monsoon from May through October. However, Phuket's scale means there is year-round demand from domestic Thai tourists, regional Asian visitors and long-stay guests even in the rainy months. A well-managed property with flexible pricing can maintain 50 to 60 percent occupancy even in low season.

Koh Samui's seasonality is inverted relative to Phuket. Its high season aligns partially with Phuket – December to March is strong – but the island's northeast-facing geography means it is less affected by the southwest monsoon and more exposed to the northeast monsoon in November and December. This creates a more complex pattern where neither season is entirely predictable. Investors planning primarily short-term rental strategies need to model this carefully.

For investors focused on maximum yield consistency through the year, Phuket is the stronger choice. For investors willing to accept higher seasonal variance in exchange for a more exclusive product, Koh Samui can deliver.

Capital Growth: Where Do Prices Go?

Both markets have delivered meaningful capital appreciation over the past decade, but the drivers are different.

Phuket's price growth has been underpinned by sustained infrastructure investment, the expansion of Phuket International Airport, rising tourist numbers and growing demand from Middle Eastern and Eastern European buyers alongside the traditional European and Australian base. Annual price growth in established areas has averaged 5 to 8 percent in recent years, with off-plan projects in Bang Tao and Laguna outperforming.

Koh Samui's capital growth story is more dependent on scarcity. Because the island has planning restrictions that limit high-density development, supply is naturally constrained. Premium villas in Bophut, Choeng Mon and Maenam have appreciated well, but the market is thinner and growth can be lumpy rather than linear. Individual asset selection matters far more than in Phuket.

For investors seeking more predictable capital growth with deeper market data to support it, Phuket has the edge. Koh Samui suits investors who understand illiquidity risk and are buying a specific asset rather than a market position.

Ownership Structure: A Critical Factor for Both Markets

Foreign buyers cannot own land freehold in Thailand. This applies equally to Phuket and Koh Samui and shapes every investment decision.

For condominiums, foreigners can own up to 49 percent of the total floor area of a building in freehold. This is the cleanest ownership route and the one we recommend for most first-time Thailand investors.

For villas and land-attached property, the primary structures are long-term leasehold (typically 30 years with two renewal options, giving effective tenure of up to 90 years), or ownership through a Thai company limited. The company structure is widely used but requires proper legal setup, ongoing compliance and genuine Thai shareholders. Done correctly it is a legitimate and effective structure; done incorrectly it creates significant risk.

For a full explanation of how these structures work and what each one costs, see our detailed guide on buying property in Thailand as a foreigner – freehold vs leasehold.

This ownership question is particularly relevant on Koh Samui, where the predominance of villa product means most investors are dealing with leasehold or company structures rather than straightforward freehold condominium purchases.

Exit Strategy: The Question Most Buyers Don't Ask

The exit is where many Thailand investors are surprised. Both Phuket and Koh Samui have thinner resale markets than investors accustomed to European or Dubai real estate might expect. Selling takes longer. Buyer pools are smaller. Agent networks are fragmented.

In Phuket, resale liquidity is meaningfully better than anywhere else in Thailand. There is an established secondary market, particularly for branded residence units and well-located condominiums. Realistic resale timelines range from 6 to 18 months depending on pricing and asset quality. Distressed sellers who need to exit quickly typically do so at a discount of 10 to 20 percent from fair market value.

In Koh Samui, exit timelines are longer and less predictable. Villa resales on the island can take 18 months to 3 years to complete at the right price. The buyer pool is genuinely smaller. This is not a reason to avoid Koh Samui, but it is a reason to treat it as a longer-term hold and to price that illiquidity into your investment decision at entry.

Currency risk is also a consistent factor. With rental income and resale proceeds in Thai Baht, the exchange rate to EUR or USD at the point of repatriation materially affects total returns. This is manageable but needs to be planned for.

Which Market Is Right for Which Investor?

Phuket suits investors who want reliable yield, more standardised due diligence, better exit liquidity and a market with more data and comparable transactions. It is the stronger choice for first-time Thailand investors and for those with a primary objective of income generation.

Koh Samui suits investors who are buying a specific premium product, understand illiquidity and are comfortable with a longer hold horizon. It can deliver excellent returns on the right villa in the right location, but it demands more specific market knowledge and a more patient exit strategy.

Both markets offer genuine opportunity in 2026. The key is matching the market characteristics to your investment objectives – not the other way around.

If you are weighing up a specific budget, preferred structure and return target across either or both markets, the right starting point is a conversation about your actual objectives rather than a generic comparison. That is exactly what we do at Properties by Benjamin.