Electricity, Water and Internet on Koh Samui 2026: Setup Guide

Once you've signed a lease on Koh Samui, three practical questions follow immediately: can the electricity and water meters be put in your own name, what will you actually be billed, and how long does it take to get internet connected. None of these are complicated once you know the process, but the numbers you'll see quoted online vary more than you'd expect — this guide sets out what's confirmed and what still needs a phone call to the utility office. This is general information; utility policies and tariffs change, so confirm the current figures with PEA, PWA or your internet provider directly.

Electricity: PEA meter transfer and what you'll pay

Koh Samui is served by the Provincial Electricity Authority (PEA). A tenant can generally have the meter transferred into their own name, provided the property already has its own meter and you can show your rental contract, ID/passport, and in some cases the landlord's consent. There is no security deposit for a residential meter: since March 2020, under a rule of Thailand's Energy Regulatory Commission, PEA no longer collects an electricity deposit from new customers in the residential (Type 1) and small-business (Type 2) categories. If anyone asks you for a “meter deposit” for a normal home, ask what it is for and get a receipt.

The official tariff versus what many landlords actually charge

This is the point worth understanding before you sign anything. The PEA residential tariff is tiered, and for September–December 2026 the Ft (fuel/energy cost) surcharge is confirmed at 0.1623 THB per kWh, keeping the average all-in residential rate at roughly 3.95 THB per kWh before 7% VAT for a typical household. According to our local team, however, private landlords on Koh Samui commonly charge tenants 7–10 THB per kWh — well above the official rate. This markup is common market practice for privately rented houses and villas, even though a 2025 consumer-protection notice from the OCPB is reported to restrict this kind of surcharge specifically for larger commercial landlords (three or more rental units) — it does not appear to reach the typical single-property private landlord. If your name is on the PEA meter directly, you pay the official tariff; if you're billed by the landlord off a shared or landlord-held meter, expect the higher rate unless your contract says otherwise. It's worth asking directly, before you sign, whether the meter will be in your name and, if not, what per-kWh rate you'll be charged.

PEA bills can be paid through the PEA Smart Plus app, at 7-Eleven and other bill-payment counters, or by bank transfer — useful once the account is in your own name.

Water: PWA, and the reality of seasonal shortages

Piped water on the island comes from the Provincial Waterworks Authority (PWA), under the Phuket/Samui/Phangan tariff zone. As with electricity, a tenant can usually apply to have the water connection transferred to their own name with a rental contract and ID, PWA's own customer guide states that residential (Type 1) users are exempt from the water-usage deposit, an exemption in place since May 2020. The monthly minimum charge for low usage is reported inconsistently between sources (somewhere in the 50–150 THB range comes up repeatedly, but not a single confirmed number) — ask the PWA office directly for the current figure.

More important in practice: water shortages are a live, recurring issue on Koh Samui, affecting different areas of the island at different times rather than being a fixed, predictable problem. According to our local team, this is an active concern in 2026. Two common workarounds if your area is affected or your building isn't on mains water at all:

• Tanker delivery — a water truck fills a storage tank on the property, arranged privately or through the landlord/property manager
• A private well or borehole — more common on villas and houses than apartments, and worth asking about specifically if the property has one already, since it reduces dependence on mains supply

Ask your landlord directly whether the specific area has had recent water interruptions, and whether the property has backup storage or a well — this is a more useful question than any island-wide statistic, since the picture changes by neighbourhood and by month.

Internet: fibre from AIS or True

AIS Fibre and True are the two main fibre providers covering most developed parts of Koh Samui. Typical contracts run 12 or 24 months, and in both cases the router is provided on loan and must be returned at the end of the contract — it isn't yours to keep. According to our local team, installation usually takes one to four working days after signing up, depending on the provider and how busy they are at the time. Remote or newly developed areas can take noticeably longer if fibre isn't already run to the property. Before signing a rental contract, it's worth checking with the property owner or a neighbour whether fibre is already installed at the address — that alone is often the biggest factor in how quickly you're online.

While you wait: a mobile data backup

Because fibre installation timing is genuinely unpredictable, it's worth keeping a Thai SIM with a generous data allowance as a backup during your first week or two in a new place, or as your only connection if you end up working from cafes while you wait. AIS, True and dtac (now merged with True) all sell prepaid data packages that can realistically cover remote work for a short stretch, and a mobile hotspot or a phone's tethering feature is usually enough for video calls and everyday browsing in the meantime. This is also a sensible fallback to keep active permanently, not just while waiting — fibre lines on the island can go down during storms in the rainy season, and a mobile backup means a short outage doesn't cut you off completely.

Checklist: setting up utilities in your first weeks

• Ask before signing the lease whether electricity and water meters can be put in your own name, and at what rate you'll be billed if not
• Bring your rental contract and passport/ID to the PEA and PWA offices to apply for a transfer or new connection
• Photograph the electricity and water meter readings on move-in day, before any bills arrive
• Ask specifically whether the area has had recent water shortages, and whether the property has tank storage or a well as backup
• Check whether fibre is already run to the property before assuming a quick internet install
• Set up the PEA Smart Plus app (and the PWA's own payment channel) once your accounts are active, to avoid missed bills while travelling

Utilities are one part of the monthly budget — for how they fit into overall cost of living, see our guide to the cost of living on Koh Samui, and for how utility costs vary by area and property type, our guide to long-term rental prices on Koh Samui. If you're renting a villa with its own pool, running costs work a little differently again — see our guide to long-term pool villa rentals. And since the rainy season brings its own power and water considerations, our guide to living on Koh Samui through the rainy season is worth reading before October.