Is Airbnb legal in Thailand? The 30-night rule explained for condo investors

The short answer

Short-term rentals in Thailand — including Airbnb-style stays — are regulated by two separate laws that apply at the same time:

1. The Hotel Act B.E. 2547 (2004) — national legislation governing any establishment that takes paid overnight guests.
2. The Condominium Act B.E. 2522 (1979) as amended — governs the rules of condo buildings.

The most-quoted figure online — the "30-night rule" — comes from the Hotel Act. Stays of 30 nights or longer are generally outside its scope. Stays shorter than 30 nights, in unlicensed premises, are not.

If you own a condo and want to put it on Airbnb, the practical implication is straightforward: nightly rentals carry meaningful legal and operational risk that doesn't apply to monthly rentals. This article explains where that risk comes from, who actually enforces what, and how investors operating at scale stay compliant.

What the Hotel Act actually says

The Hotel Act defines a hotel as "any establishment which is operated for business purposes by furnishing accommodation to general customers for compensation". There are two well-known exemptions:

• Establishments with four rooms or fewer and a total capacity of no more than 20 guests, provided the operator gives the local registrar a notification (this is the "small accommodation" provision).
• Establishments where the rental term is one month or longer.

The second exemption is what creates the 30-night threshold. A unit rented to a guest for 30 nights or more is, in the language of the Act, a long-stay rental — not a hotel — and therefore outside the Hotel Act's licensing requirement.

For nightly rentals to be legal, the operator needs a hotel licence for the premises. Issuing a hotel licence for an individual condo unit is, in practice, almost never granted — most condo buildings are zoned residential and don't meet the structural requirements for hotel classification.

What the Condominium Act adds

The Condominium Act gives each building's juristic person (the body that manages the building, broadly equivalent to a homeowners' association in the US) the authority to set its own rules — and many Bangkok condos have explicit by-laws against short-term rentals, regardless of what the Hotel Act says.

A juristic person can:

• Refuse to register guests staying under a stated minimum period
• Impose fines on owners listing units below the building's minimum stay
• Block access if it concludes the unit is being operated commercially

In other words: even where the Hotel Act doesn't apply (e.g. monthly rentals), the building's rules might. Owners need to confirm their specific building's by-laws before listing anywhere.

TM30 — the reporting obligation that applies regardless

Separately from both Acts, Thai immigration law requires the landlord (or property manager) to file a TM30 notification to the local immigration office every time a foreign national stays at the property. This applies to every stay, every length, every booking channel — from a 2-night Airbnb to a 12-month lease.

TM30 is administrative, not punitive in spirit, but failure to file does carry fines for the landlord. Most foreign condo investors discover TM30 the first time they get a request from immigration; almost no individual landlord files it consistently on their own.

A good property manager files TM30 for every booking, as standard. We do.

What enforcement actually looks like

The gap between "what the law says" and "what gets enforced" is wide in practice. Most short-term listings in Bangkok run for years without intervention. Enforcement tends to come from three directions:

1. Building juristic person complaints — neighbours notice a stream of strangers, file a complaint, the juristic person investigates. This is the most common path.
2. Immigration spot-checks — when a foreign guest registers somewhere unexpected and TM30 hasn't been filed.
3. Police raids — rare but real. Usually triggered by a specific complaint or a broader crackdown campaign in a particular district.

When enforcement happens, the consequences range from a fine paid by the operator, to a building-wide ban, to (in extreme cases) a temporary closure of the unit. The pattern is increasingly toward enforcement at the building level — juristic persons cracking down on unauthorized short-term operation in their buildings.

What this means for foreign condo investors

If you own a condo in Bangkok and want it to earn rental income, the cleanest path is to operate in a way that's legal under both laws and acceptable to your building:

• Monthly rentals (30 nights or more) — outside the Hotel Act, generally acceptable to most condo buildings. Lower nightly rate, but predictable income and no regulatory exposure. This is the default for prudent investors.
• Nightly rentals — only meaningful for properties where the building explicitly permits short-term operation (rare in Bangkok), or for houses and villas where the Condominium Act doesn't apply. Higher revenue ceiling, higher operational complexity, higher risk.

Hybrid models — daily during high season, monthly off-season — exist but require careful management of building relationships and platform configurations.

How Maison Siam handles compliance

Every property we manage runs to a defined compliance baseline:

• Lease agreement drafted for each booking and submitted to the condo juristic person for guest registration — in compliance with both the building's rules and Thai law
• TM30 filing for every booking, on the owner's behalf
• Juristic building coordination when access registration or face-scan procedures are required
• Rental term per booking managed against the building's minimum stay rules

For our condo clients, this means the legal-and-operational layer is handled — owners can focus on what their property earns, not whether it's allowed to.

The honest summary

Thailand's regulatory framework for short-term rentals is more restrictive than most foreign owners initially realise, but the path to compliance is well-defined:

• Monthly rentals are clean.
• Nightly rentals in condos are usually grey.
• TM30 is mandatory.
• Your building's juristic by-laws often matter more than the Hotel Act itself.

If you're holding a Bangkok condo as an investment and weighing daily vs monthly, the legal answer leans firmly toward monthly. The financial answer often agrees: our income estimator shows what a real mid-term-rental income looks like after fees and operating costs.

If you want to talk through your specific building's by-laws and what's actually allowed, get in touch.

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This article is general information, not legal advice. For situations involving disputes, building escalations, or enforcement actions, consult a Thai lawyer who specialises in property and accommodation law.