Legal Guide for Thai Dormitory & Rental Owners: Laws, Tax, Contracts You Can't Miss

First, find out whether your business meets the legal definition of "dormitory." The word means something narrower in law than in everyday Thai.

• Section 4 — A "dormitory" houses students aged ≤ 25 only.
• If you rent to working adults or the general public, you are not a dormitory under this Act — you fall under general rental law + the CPB Notice instead.
• Qualifying dormitories must register with the Provincial Office of Social Development and Human Security, and segregate male/female buildings.
• Managers must complete training and be registered as required by the Act.

The CPB Notice on "Residential Building Rental as a Contract-Controlled Business" B.E. 2561 (issued 2018, effective 1 May 2019) governs anyone renting **5+ units**. This is the law owners break most often.

• Security deposit — maximum 1 month's rent.
• Advance rent — maximum 1 month's rent.
• Water and electricity must be billed "at the rate charged by the service provider" — no markup allowed. (Owners charging ฿8/unit while MEA charges ฿4–5 = violation.)
• Deposit refund must be returned promptly upon contract termination (less legitimate damage). Clauses requiring "3-month notice or forfeit deposit" are void.
• Itemised billing required — tenants must be able to verify each charge.
• Clauses allowing the landlord to seize belongings or change locks are void under the Notice.

Basics of lease contracts — how to terminate for non-payment, what happens to leases over 3 years.

• Section 538 — Real estate leases must be in writing. Leases over 3 years must be registered with the Land Department.
• Section 560 — For non-payment, the landlord must give the tenant at least 15 days' notice to pay before terminating.
• Section 566 — Open-ended leases require at least one rental period's notice to terminate (one month for monthly rentals).
• Section 569 — A lease survives a change of ownership — important when selling the building.

The most misunderstood point — dorms/apartments/rental homes leased **monthly or yearly for residential use** are classified as **"Residential"** (per Ministry of Interior rulings), not "Commercial" as many fear.

• Leased monthly/yearly for residential use (dorm/apartment/rental home) = "Residential" rate, 0.02–0.10% of assessed value (0.02% for value ≤ ฿50M).
• Daily rentals or other commercial use (guesthouse/hotel) = "Other" rate, capped at 1.2% — far higher.
• The ฿50M exemption applies only to a primary residence where the owner is on the house registration — a rental building is a secondary property, taxed from the first baht at 0.02%.
• Paid annually — typically April, billed by the local Tambon Administrative Organisation.
• Late payment — 10–40% surcharge plus 1% per month.
• ⚠️ Some local authorities have classified this differently — check your assessment notice and confirm with the local office before filing.

Many owners assume rent is "personal" and tax-free. It is not. Revenue Department can audit from bank transfer records.

• Rental income = Section 40(5) of the Revenue Code.
• Standard deduction 30% (for buildings/structures) or actual cost.
• File PIT 94 by September (first-half year) and PIT 90 by March of the following year (full year).
• Real estate rent is VAT-exempt under Section 81(1)(t) — no VAT registration required regardless of revenue.
• Corporate tenant must withhold 5%; landlord receives a 50-Tawi certificate to credit against tax.

Most-violated law because owners simply don't know — but penalties are mild, so it usually catches owners only during inspections.

• Immigration Act B.E. 2522 (1979), Section 38 — building owners must report foreign nationals staying with them within 24 hours.
• File online at extranet.immigration.go.th (free, do it yourself).
• Applies to all foreign nationals — including Thai-foreign dual citizens entering on a foreign passport.
• Keep records for at least 1 year.

ID card copies, house book copies, phone numbers, bank accounts — all are "personal data" under PDPA.

• Personal Data Protection Act B.E. 2562 (2019) — fully effective 1 June 2022.
• Collecting tenant data needs a legal basis (e.g. contract performance) and purpose disclosure.
• Do not share tenant data with third parties (creditors, brokers) without consent.
• Security measures required — ID copies in an unsecured Google Drive may be non-compliant.
• Tenants have the right to data deletion at contract end (except where other laws require retention — e.g. tax: 5 years).

When tenants don't pay, many owners change locks or cut power. This is a criminal offence — the tenant can press charges.

• Criminal Code Section 358 — destruction of property (changing locks on tenant belongings).
• Section 362 — trespass (entering the tenant's room without consent).
• Cutting utilities to pressure may also constitute coercion (Section 309).
• The correct path: Section 560 CCC notice (≥15 days) → contract termination → eviction lawsuit in District Court.
• District Court handles cases ≤฿300,000 quickly. Free legal counsel available via the Lawyers Council of Thailand.