Phuket vs Koh Samui: which should you move to?

Pick Phuket if you want beaches with a hospital, an airport and international schools behind them. Its comfortable month is $2,470 against Koh Samui's $2,359 (September 2026), a $111 gap, 4.5%. Phuket spends that on a hospital that treats rather than evacuates, and an airport that carried 17.4 million passengers in 2025. Neither can be bought back on Samui at any budget.

Current at 9 September 2026. Dollars at THB 32.9 to US$1, the rate of 8 September 2026.

Side by side, with the day every figure was read

Three lines carry the gap, and rent is not one of them

Both books use the same seven budget lines, so the columns subtract.

The rent line is identical, and it is the most useful fact here. At THB 35,000 ($1,064) you rent a new one-bedroom flat in Bang Tao or Rawai. The same money on Samui rents a two-bedroom pool villa in Bophut, Maenam or Lamai (September 2026).

The comfortable gap is $111 a month, from the two guides' published totals (config/cities.yml, 8 September 2026). The line items below sum to THB 3,600, which converts to $109 — a $2 gap between the two paths. CHECK

Food differs because Phuket's west-coast restaurant strip is priced above Bangkok, and Villa Market at Boat Avenue is the import channel. Samui has no Villa Market. Transport differs because a Phuket scooter rents for THB 4,000–5,000 a month ($122–152) against Samui's THB 2,500–4,000 ($76–122). Numbeo's basket agrees: milk runs $1.48 on Samui against $1.85 on Phuket, and chicken $2.32 against $3.43 (numbeo.com, 3 and 11 July 2026). CHECK That may explain a cited 15–25% island premium (insidesamui.com, April 2026).

CHECK Numbeo inverts the pair on rent. A centre one-bedroom reads THB 27,596 on Samui (page updated 10 September 2026, 39 contributors) against THB 24,467 on Phuket (data of 11 July 2026, 41 contributors). That runs against both books. The Samui sample skews foreign, and on an island where monthly carries two prices a holiday rate can enter it.

At the basic tier the gap moves into rent: THB 9,000 against THB 13,000 is $122 of the $179 (September 2026). At the luxury tier, Phuket runs THB 280,500 ($8,525, THB 150,000 rent) against Samui's THB 207,000 ($6,292, THB 90,000 rent): rent is 82% of the gap. See what a Phuket month costs, line by line.

Then the line that is in neither budget, and it is Samui's. One person's Bangkok return costs THB 5,600–16,000 ($170–486). Both books budget four to six mainland trips a year: visa runs, a specialist, family. That is $71–203 a month, which erases the $111 and can invert it.

Cost is Koh Samui's axis: cheaper at both published tiers, 17% cheaper at the bottom.

The visa is identical, so the licence decides this axis

The DTV is the route on both islands, at the terms above: THB 10,000 ($304) for the visa, THB 500,000 ($15,200) held three months. Since 31 August 2026 you apply at the mission covering your nationality or residence, with a criminal-record certificate. Paris asks for one under three months old; London accepts one up to six months (thaiembassy.fr, 7 September 2026; thaiembassy.com, 1 September 2026). CHECK Each mission sets its own window; no central rule text was found.

The settling figure here is zero. The Thai DTV rules are national law. So the axis turns on what the visa lets you do after you land: drive, because neither island works without a vehicle.

CHECK Whether a DTV holder may hold a Thai licence has two answers. Phuket's transport office at Thalang is reported to accept a DTV plus a residence certificate from Phuket Immigration, but no 2026 source confirms it. For Koh Samui, no source states which visa classes the office accepts. The national rule wants a non-immigrant visa or a work permit.

Phuket wins this axis narrowly, not on the visa: a documented but unconfirmed yes beats a blank.

Six scheduled bus services against none

Phuket runs a flat THB 100 ($3.04) bus, airport to Rawai, every 30 minutes; a town-to-Patong run costs THB 50 ($1.52) (phuketsmartbus.com, read 10 September 2026). Samui's equivalent is a converted pickup with no fare list. A 3 km Chaweng–airport ride costs a local THB 30–40, a foreigner THB 200–400 (insidesamui.com, 15 June 2026).

In the air the gap is wider. Phuket carried 17.4 million passengers in 2025, 10.0 million of them international. Bangkok–Phuket is a five-carrier route with low-cost fares (thethaiger.com, 18 January 2026).

Samui carried 2,781,564 passengers in 2024. Bangkok Airways built and owns that airport, and is the only nonstop carrier, at THB 2,795–8,000 ($85–243) one way for 65 to 70 minutes. One-way fares start at $59, averaging $132 over 30 days, round trip from $155 (us.trip.com, September 2026). It also cut April–October 2026 capacity: Singapore 17 to 14 weekly, Phuket 8 to 7 daily, Krabi 2 to 1. The workaround costs a day each way: fly to Surat Thani from THB 1,000 ($30), a van to Donsak, then a ferry from THB 80–200.

Taxis on both islands refuse the meter — not a difference. The bus line and the airport are, and Phuket takes the widest axis in the pair. More in getting around Phuket without a car.

Phuket's wettest months are its cheapest, and Samui's are its dearest

Phuket's calendar works with you. September brings 350.4 mm and October 336.0 mm, about 30% of a 2,271.5 mm year. Those are the empty months Phuket, honestly says to sign a twelve-month lease in. Samui's calendar fights you: its wettest month is November at 444.6 mm, which the industry still prices as high season. February is the driest on both, 24.0 mm on Phuket against 64.3 mm on Samui (WMO and Ko Samui station normals, 1991–2020, read 10 September 2026). CHECK Samui's annual total reads 1,994.3 mm in the same normals, 1,645 mm elsewhere.

Then the water. Samui began rationing on 3 August 2026, two zones on rotating supply, producing 16,000 m³ a day against 34,000 demanded — an 18,000 m³ shortfall. Phuket rotates pressure in dry months, but its three reservoirs held about 12 million m³ in March 2026, 52% of capacity.

CHECK Whether Samui is still rationing today could not be confirmed. The Bangkok Post report returned HTTP 402 and aseannow HTTP 403 on 10 September 2026. The start date and the shortfall are sourced; the present tense is not.

Phuket wins the season and the water. Read the month table before you book on when to arrive on Koh Samui.

What Phuket has that Samui cannot buy at any budget

Medicine comes first: a budget cannot fix it. Bangkok Hospital in Phuket Town is a full private centre. Bumrungrad is building a THB 4.3bn ($131M) hospital there for 2027. Samui has one JCI-accredited hospital, Bangkok Hospital Samui in Chaweng Noi. It stabilises and medevacs; the other five facilities refer into it, and it refers to Bangkok.

Bangkok Hospital Samui, the island's only JCI hospital, publishes no bed, ICU or specialist count (bangkokhospital.com/en/samui, 11 September 2026). The only Gulf-coast chamber is on Koh Tao; none is confirmed on Samui (sssnetwork.com, 11 September 2026).

Then depth of stock. Phuket lists 40,600 units across 343 developments, against Samui's two-building freehold pool. Samui was also raided on 15 August 2026: 60 nominee cases, 88 suspects (26 Thai, 62 foreign), 14 arrests and THB 1.2bn ($36.5M) of company-held property. Phuket sits inside a national review of 36,277 foreign-linked firms with no island-specific operation.

It is a buyer's island: you can wait. New villa launches fell 74.3% to 298 units in H1 2025, sales fell 70%, and absorption fell to 1.8% a month, leaving 1,908 unsold villas worth THB 73.73bn ($2.24bn) (REIC, via nationthailand.com). Above THB 40M ($1.22M) in Bang Tao and Surin, 249 are unsold against 20 sold — 77 months of stock. Second-hand took 63% of transactions at roughly half new-build prices. See buying a Phuket condominium rather than a villa.

Samui went the other way. Luxury launches rose 63.56% in H1 2025 across 52 projects and 597 units, worth THB 14.8bn. Rental supply rose 34% to 3,055 villas, and the nightly rate fell 11% to THB 13,012 ($395) (samuipropertygroup.com, 2026).

CHECK Nobody publishes an unsold-inventory series for Samui. Phuket has the REIC count; Samui has one agency noting stock in Maenam.

What Samui has that Phuket cannot build

The bottom of the market is Samui's, by more than the $179 published. A Nathon or Lipa Noi studio runs THB 7,000–12,000 ($213–365). A room from a private landlord in Nathon, Maenam or the Lamai back streets runs THB 4,000–7,000 ($122–213). Phuket's cheapest modern band starts at THB 8,000 ($240) in Kathu, inland, with no bus and no beach (both books, September 2026). Start with how a long-stay Samui lease is priced.

The comfortable tier argues better: THB 35,000 buys a flat on Phuket, a pool villa on Samui. A two-bedroom pool villa runs THB 25,000–50,000 ($760–1,520) island-wide (fazwaz.com, read 9 September 2026), and THB 35,000–65,000 ($1,064–1,976) in Maenam specifically (Koh Samui, honestly, September 2026). The cause is legal, not taste: a ministry notification caps building at 12 metres and three storeys island-wide, so there are no towers.

CHECK The claim that 88.6% of Samui listings are villas is one agency's own count, as is the five-development figure. Nor is the pair cross-checked the same: Phuket has Numbeo and Expatistan; Samui has no Expatistan page.

Air goes to Samui, on this site's own sorting. The live readings tie: IQAir 34 for Phuket and 36 for Samui on 10 September 2026. Nomads.com read Samui separately at 51 US AQI, moderate, on 9 September 2026. But Samui has no significant burning season, and the free sampler names Koh Samui, not Phuket, in its asthma answer.

CHECK Phuket's air cannot be checked over a year: no published annual PM2.5 series exists. Even a single day moves — the city page reports 48 across 13 stations on 10 September 2026, iqair.com 34 at 19:08.

The island is small: you live beside your own airport. Bangrak is 3 to 4 minutes from the terminal, Choeng Mon 5, Bophut 15 (both books, September 2026). On Phuket, Bang Tao is 30 to 40 minutes out, Rawai 60 to 90. Phuket launched 45,066 condominium units between 2021 and 2025. The trade-off runs area by area in the seven places people actually live on Samui.

Pick Phuket if, and pick Koh Samui if

Pick Phuket if any of these is you.

• You are retiring, and you want a private hospital and an international airport in one place
• You intend to buy, and you want more than five buildings to choose from
• You fly monthly, or family will visit from Europe or Australia
• You have children, and you need BISP, UWC or HeadStart, all three on the west coast

Pick Koh Samui if all of these are you.

• A foreign employer pays you, you will rent and never buy, and $2,359 a month is comfortable
• You want a two-bedroom pool villa rather than a one-bedroom flat at the same THB 35,000
• You fly out no more than twice a year, so the access premium stays under $70 a month
• You have lived through one tropical wet season, and no condition needs a specialist on a bad day

Both books print the arithmetic address by address: 25 named Phuket buildings and 20-plus named Samui estates, each with a rent and a price beside it.

Most readers should pick Phuket, and some should pick neither

Phuket holds three of the four axes, and the fourth is worth $111 a month. What that $111 buys back on Samui is a hospital that evacuates rather than treats, one airline to Bangkok, and a two-building freehold pool. Phuket's costs — money, noise, building sites, a rent that moves with the season — you manage by address and month. Medicine and access you cannot. So moving to Phuket is the answer for most readers here.

One reader should still pick Samui, and the Samui book names them. You work remotely for a foreign employer, you will drive, and $2,359 a month is comfortable. Add the reader choosing on air, since the sampler puts Samui in the asthma answer. For them moving to Koh Samui is right, and Phuket is an expensive mistake.

Some readers should pick neither: Bangkok, at $970 basic and $2,180 comfortable (September 2026), cheaper than both at that tier. Take it if you will not ride a scooter: Phuket fined 20,901 foreigners in 2025, and Samui has no bus. Take it if you are buying something you might need to resell; only Bangkok and Ho Chi Minh City offer a genuine resale case here. Take it if you need medical depth: Bangkok, Kuala Lumpur and Singapore are in another league. If the constraint is only money, the branch is Chiang Mai at $778 and $1,584 — but only if you can leave from February to April.

Related

The season sets the rent on either island, so settle the month before the address on when to move to Phuket. Still weighing more than two? Compare all ten cities on cost, visa, transit and air.