Most divers, dive professionals and long-stayers need a lawyer for Koh Tao sooner or later — above all to structure a land lease or dive-business purchase safely, since the island has almost no condos and foreign land ownership runs through leases and company structures instead. This guide covers what lawyers help with, typical fees in Thai baht, how to tell a lawyer from a visa agent (and from Koh Tao's own limited immigration office), and how to vet a firm — and avoid nominee traps — before you hand over money.
Thai law is conducted in Thai, follows its own procedures, and treats foreigners very differently in areas like land and company ownership — which matters on Koh Tao, where condos are essentially nonexistent and guesthouse, resort and dive-shop ownership runs through leases or company structures instead. No law firm sits permanently on the island itself; residents use a Koh Samui or Surat Thani firm that regularly handles Koh Tao clients, or a Bangkok firm for complex company and visa work, often by phone or video call. Koh Tao's own immigration office covers routine reporting and a single extension, but everything beyond that — property, business and full visa work — needs a lawyer. Below is what to hire one for, roughly what it costs in baht, and how to choose a firm you can trust. Fees are typical ranges only; always confirm a written quote and scope with the specific firm.
Koh Tao has essentially no condominiums, so a foreign resident who wants to own rather than rent a guesthouse, bungalow property or dive resort has to deal with land. Foreigners cannot hold Thai land outright, so property here is typically held on a registered long-term lease or through a Thai limited company with genuine Thai shareholders. A lawyer runs a title search at the district land office, checks access and boundary issues common on the island's steeper east-coast plots, and structures the lease or company correctly before you commit capital to a build, renovation or dive-centre purchase.
A Thai company that genuinely trades and has active Thai shareholders can legally hold land for a foreign-run business. A company set up purely as a nominee — Thai names on paper holding land only for a foreigner's benefit — is illegal under Thai law and a common way buyers get caught out on small resort islands. A lawyer gives you an honest read on whether an existing structure (common on a dive-shop or guesthouse resale) or one you're proposing is defensible, not just paperwork that looks official.
Koh Tao has its own Thai Immigration office between Mae Haad and Chalok Baan Kao, which is a genuine convenience — it handles 90-day reporting and a single 30-day extension of a visa-exempt or tourist-visa stay (TM7, 1,900 baht) without leaving the island. What it can't do is a full visa renewal, extensions for non-tourist categories such as retirement, marriage or business, or an actual border or visa run, since the island has no airport or border crossing of its own. Lawyers handle the harder cases a visa agent won't touch: work-permit-linked visas tied to a dive centre or resort, extensions after an overstay, blacklist issues, or an application that's already been refused.
Koh Tao's foreign-run businesses cluster around diving — PADI 5-star centres in Sairee Beach and Chalok Baan Kao, plus guesthouses, bungalow resorts and dive-boat operations. A lawyer sets up the Thai limited company, checks the Foreign Business Act licence a dive centre or resort needs, arranges work permits for instructors and managers tied to the business, and drafts commercial leases and staff contracts — the paperwork that turns a dive-shop job into a business a bank or immigration officer recognises as legitimate.
Marrying a Thai partner starts with an affirmation of freedom to marry from your embassy — none are based on the island, so this step is handled in Bangkok or by mail — followed by certified translation and legalisation before registration at the district (amphur) office covering Koh Tao. A lawyer can also draft an enforceable prenuptial agreement, which must be registered together with the marriage. If you hold a land lease, dive-shop company shares, a scooter or a Thai bank account, a bilingual Thai will matters too — without one, an estate is settled under Thai intestacy law, which can strand a foreign spouse without quick, ferry-only access to sort it out.
Indicative ranges gathered from common diver, business-owner and long-stayer matters on and around the island. Government charges, certified translation and legalisation are usually extra unless a firm quotes an all-in fixed fee in writing.
| Service | Typical fee (THB) | Notes |
| Initial consultation | Free - 3,000 | Many firms serving the island offer a free intro call or meeting |
| Senior lawyer hourly rate | 3,000 - 9,000 / hr | Boutique Koh Samui or Surat Thani firms serving Koh Tao sit mid-range |
| Land lease or company-structure due diligence | 35,000 - 80,000 | Land-lease and company structuring for a guesthouse, resort or land purchase |
| Lease drafting or review | 5,000 - 18,000 | Long-term land and commercial leases (dive shops, resorts) cost more |
| Thai company setup for business/property | 30,000 - 60,000 | Plus government fees and registered capital |
| Foreign Business Act licence (dive centre/resort) | 20,000 - 45,000 | Often bundled with company setup for dive and hospitality ventures |
| Retirement, marriage, DTV or LTR visa assistance | 10,000 - 28,000 | Excludes government fees and certified translation; routine extensions can often be handled on-island instead |
| Work permit application | 15,000 - 30,000 | Often bundled with company setup for dive-instructor or manager roles |
| Marriage registration support | 10,000 - 25,000 | Affirmation, translation, legalisation, amphur filing |
| Prenuptial agreement | 15,000 - 38,000 | Must be registered with the marriage to be valid |
| Thai will drafting | 10,000 - 28,000 | Bilingual will covering Thai-situated assets |
| Litigation / court representation | 50,000+ | Highly dependent on the case; factor in travel since there's no on-island court |
A practising lawyer in Thailand is licensed by the Lawyers Council of Thailand. Koh Tao has no law firms based permanently on the island itself — residents typically use a Koh Samui or Surat Thani firm that regularly handles Koh Tao clients, or a Bangkok firm for complex company and visa work. Confirm genuine English fluency, ask for bar registration, and favour a firm with real experience in land-lease and company structures on the smaller Gulf islands rather than a mainland generalist.
Do not rely solely on a lawyer recommended by the seller of a guesthouse, resort or dive shop — their job is to close the sale. Engage your own lawyer to run the lease or company-structure due diligence and confirm access, title and any PADI or Foreign Business Act licensing are clean. Given how often Koh Tao dive-centre and guesthouse stock changes hands between long-staying foreigners, this is the single most common point where a modest fee saves a much larger loss.
Koh Tao's own immigration office handles routine 90-day reporting and a single 30-day tourist-visa extension — for that, most residents don't need a lawyer or agent at all. Reach for a lawyer (or, for simple paperwork, a visa agent based on Koh Samui) when a full visa renewal, a business-linked work permit, a refused application, overstay or blacklist issue is involved — anything with real legal exposure rather than a form filed at the local office.
Because every lawyer serving Koh Tao works off-island, confirm up front whether meetings happen by video call or require your ferry trip to Koh Samui, and get a written quote covering government fees, translation, legalisation and any travel costs before you commit. Staged payments tied to milestones protect you far better on a lease, company or dive-business matter than a single up-front sum.
Read independent reviews, confirm the firm is Thai-registered, and be wary of anyone pressuring a fast wire transfer or guaranteeing a land-lease or visa outcome. Thailand has no Western-style notary public — ask specifically for a Notarial Services Attorney if you need documents certified for use abroad. Keep every instruction and quote in writing and hold onto official receipts.
It's not legally required but strongly advisable. Koh Tao has almost no condos, so nearly every foreign property or dive-centre deal involves a registered land lease or Thai company structure — a lawyer checks title and access at the district land office and confirms the structure is legitimate rather than a bare nominee arrangement, which is illegal. Legal fees of roughly 35,000-80,000 THB are modest insurance against a structure that later proves unenforceable.
Not the land itself. Foreigners cannot own Thai land outright, so guesthouses, bungalow resorts and dive centres are held on a registered long-term lease (commonly 30 years) or through a Thai limited company with genuine, active Thai shareholders. A pure nominee company set up only to hold land for a foreigner is illegal, so get independent legal advice on structure before you buy or build.
No permanent firms operate on the island. Long-stayers typically use a firm based on Koh Samui or in Surat Thani that regularly serves Koh Tao clients, or a Bangkok firm for complex company, visa or litigation work — many handle routine matters by phone, email or video call, saving a ferry trip for the signings that actually require one.
It depends on the work. Initial consultations are often free or up to about 3,000 THB, senior lawyers charge roughly 3,000-9,000 THB per hour, and fixed-fee jobs range from about 5,000-18,000 THB for a lease review to 35,000-80,000 THB for land or company due diligence. Always get a written quote covering government fees, translation and any travel.
Koh Tao's own immigration office near Mae Haad handles routine 90-day reporting and a single 30-day tourist-visa extension without a lawyer or agent. Use a lawyer for business-linked work permits, full visa renewals for non-tourist categories, refused applications, overstay or blacklist issues, or anything carrying real legal risk — the island office can't handle those.
Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.
Koh Tao city hub · Koh Tao visa run & border run guide · Koh Tao banking guide · Koh Phangan lawyers guide · Thailand visa guides
Find your area and residence first, then line up the legal help you need for the lease, dive business or visa.
Hero photo by Mikhail Nilov on Pexels. General information only, not legal advice; fees, procedures and visa rules change — confirm current details with a licensed Thai lawyer and official sources.