Long-Term Rental Prices on Koh Samui 2026: By Area, Plus Utilities

Anyone comparing koh samui long term rentals for the first time runs into the same problem: every listing site quotes a different number for the "average" rent, and none of them agree. That is because there is no official rent register for Koh Samui. Prices come from what landlords and agents are currently asking, not from a government survey, so the honest way to plan a budget is with ranges rather than a single figure. This guide sets out realistic monthly ranges by property type and area, explains how season affects what you pay, and walks through the two costs that catch newcomers out most often: electricity and water.

Everything below reflects the market as it stood in September 2026. Treat the numbers as a starting point for negotiation, not a fixed price list.

Koh Samui monthly rentals: price ranges by property type

The table below groups typical asking prices for a straightforward long-term lease (six to twelve months), based on our local team's ongoing contact with the rental market on the island as of September 2026. Ranges are wide on purpose: finish quality, distance to the beach, furnishing, and how a listing chooses to label itself (a "pool villa" can mean a small plunge pool or a full resort-style build) all move the price within each band.

These bands describe a house for rent koh samui in ordinary condition and location. A run-down studio away from the coast can undercut the low end; a beachfront pool villa with full facilities can sit well above the top figure. If a listing looks far outside these ranges in either direction, it is worth asking why before assuming it is a bargain or a mistake.

How location moves the price

Location is the single biggest factor after property type and finish. Across the island, the pattern is consistent: Chaweng and Bophut (including Fisherman's Village) are the most expensive areas to rent long term, thanks to their concentration of restaurants, nightlife, beach clubs and short walkability to the beach. Nathon and the west coast are consistently the most affordable, partly because they see far less tourist traffic and cater more to local and long-term island life than to holidaymakers. Lamai and Maenam sit in between — both offer beach access and a more residential feel without Chaweng's density or Bophut's premium.

Within any of these areas, the same spread from the table above still applies. A Maenam studio and a Chaweng studio are not the same price, but neither is priced from a separate scale — location shifts you up or down within the range, rather than creating a different range altogether.

High season versus low season

Searching during high season (December to April) generally means paying more, particularly if you are negotiating a new lease during that window when demand from seasonal residents is highest. The reverse also holds: a landlord sitting on an empty property during the quieter months is often more willing to accept a lower offer simply to avoid weeks of vacancy. That said, this is a negotiating dynamic, not a fixed seasonal discount you can expect automatically — some landlords hold firm on price year-round, especially for well-located or recently renovated units. If you have flexibility on timing, viewing properties in the low season and being ready to negotiate is worth more than any published discount rate.

Electricity: what you actually pay

This is where long term rental koh samui prices research online can mislead people, because it often quotes the government tariff rather than what tenants are actually billed. Thailand's state utility, the Provincial Electricity Authority (PEA), publishes an official residential tariff that is staged by usage band, plus a separate fuel adjustment (Ft) charge and VAT. In practice, most private landlords on Koh Samui do not bill tenants at this official rate. Based on our local team's ongoing contact with the rental market (September 2026), private landlords typically charge tenants somewhere between 7 and 10 THB per kWh — noticeably above the state tariff.

This markup is common enough to be treated as standard practice rather than an exception, but it is not unlimited or unregulated in every case. Thailand's consumer protection authority (OCPB) has taken an interest in landlords who resell electricity to tenants at a markup, and industry commentary referenced a benchmark figure of around 4.88 THB per kWh as a cap that has been floated specifically for landlords operating three or more rental units. It is not clear how consistently this is enforced in practice, and it is unlikely to apply to a small individual landlord renting out just one or two properties. The practical takeaway is simpler: ask what per-kWh rate you will be charged before signing, get it in writing, and compare it against a recent PEA bill if the landlord has one to show.

Water: shortages, tariffs and tanker deliveries

Water is the utility most likely to cause surprises right now, for a reason that has nothing to do with pricing structure: Koh Samui went through a genuine, officially documented water shortage in mid-2026.

The 2026 shortage and rotating supply zones

Through July and August 2026, prolonged dry conditions combined with limited capacity in the pipeline that brings raw water from the mainland left the island's water authority (PWA) unable to keep up with demand, which is driven heavily by tourism on top of resident use. In response, PWA introduced a rotating seven-day zone-based supply schedule starting 3 August 2026. Areas named in that plan included Chaweng Noi, Bophut/Bang Rak (Fisherman's Village), Plai Laem, the airport area, Choeng Mon, the Maret tambon (which covers Lamai), Na Mueang, Lipa Noi, the Ang Thong tambon near Nathon, and Maenam. In other words, the shortage was not confined to one part of the island — it touched areas across the popularity spectrum, from Chaweng to the quieter west coast.

If you are searching for a long-term rental right now, it is worth asking directly whether the property has experienced interruptions under this rotation plan, and how the landlord handles storage (a rooftop or ground-level tank is standard on the island and buys a household time during a scheduled cut).

Tanker water and private wells

There is no official published price list for tanker-delivered water on Koh Samui. Costs vary by provider, delivery volume and how tight supply is at the time, and reported figures for a delivery of a few thousand litres have ranged roughly from 250 to 400 THB in recent years — useful as a rough sense of scale, not as a quote you should expect to be held to.

Some landlords, particularly for standalone houses and villas, rely on a private well or borehole rather than (or alongside) the mains supply. Drilling and using groundwater in Thailand is regulated under the Groundwater Act B.E. 2520, which requires two separate permits from the Department of Groundwater Resources: one to drill, and one to use the water once the well exists. As a tenant this is not usually your paperwork to handle, but it is worth knowing whether a property's water comes from a permitted well, the mains, or a mix of both, since that affects how exposed you are to a shortage like the one in 2026.

What to clarify about utilities before you sign

• The exact electricity rate per kWh you will be billed, and whether it is based on a submeter reading you can check yourself
• Whether water is billed by meter, included in rent, or charged as a flat monthly fee
• Whether the property has a water storage tank, and roughly how many days of buffer it holds
• Whether the water supply is mains (PWA), a private well, or both
• Whether the property was affected by supply interruptions during the 2026 shortage, and how the landlord responded
• Whether the quoted rent is a high-season or year-round price, and whether there is any flexibility for a longer lease commitment

Getting the full picture

Rent is only one line in the monthly budget for a long-term stay on Koh Samui — electricity and water can add a meaningful amount on top, especially for a villa with air conditioning and a pool pump running most of the day. Asking for a recent utility bill from the current tenant or landlord, rather than relying on a verbal estimate, is the simplest way to avoid a surprise in your first month.

This article focuses on what things cost. If you are still at the stage of finding a place and want to avoid common rental scams, that process is covered separately. And if you want to understand the legal side — deposit limits, notice periods and what recent changes to Thailand's rental rules actually mean for you — that is covered in our guide to the new rental law in Thailand.