เจ้าของคอนโดต้องแจ้ง TM30 ไหม: กฎหมายและขั้นตอนปฏิบัติ

If you own a condo in Bangkok and rent it out to a foreigner, you have a legal obligation that many landlords either forget about or have never heard of. It is called the TM30 form, and failing to file it can result in fines, headaches, and a very unhappy tenant. Whether you own a studio near BTS Onnut or a two-bedroom unit at Ashton Asoke near MRT Sukhumvit, the rules apply to you. Let me break down exactly what the TM30 is, who needs to file it, how to do it, and what happens if you do not.

What Is the TM30 and Why Does It Exist?

The TM30 is officially known as the "Notification Form for House Masters, Owners or the Possessors of the Residence Where Foreigners Stay." That is a mouthful, but the concept is simple. Under Section 38 of the Thai Immigration Act B.E. 2522 (1979), any person who provides accommodation to a foreign national in Thailand must notify immigration within 24 hours of that foreigner's arrival.

This applies whether your tenant just landed from overseas, moved in from another condo across town, or even returned to your unit after a short trip abroad. The law was originally designed to help Thai authorities track foreign nationals' addresses, and the Thai Immigration Bureau has been increasingly strict about enforcement in recent years.

Here is a real scenario. Say you own a unit at Life Asoke Hype near MRT Phetchaburi and you rent it to a British expat working at a company in Asoke. The day he moves in, your 24-hour countdown begins. If you do not file the TM30 within that window, you could face a fine of up to 10,000 THB. Your tenant, meanwhile, could run into issues when doing their 90-day reporting or extending their visa.

Who Is Actually Responsible for Filing the TM30?

This is where confusion sets in. The legal responsibility falls on the "house master" or owner of the property, not the tenant. If you are a Thai national who owns a condo and rents it out to a foreigner, you are the one who must file the TM30. If you own the condo through a company, the company's director or authorized representative carries the duty.

In practice, things get more flexible. Many landlords in Bangkok authorize their tenants to file on their behalf, especially expats who are used to handling their own immigration paperwork. You can do this by providing a signed authorization letter along with a copy of your Thai ID, the property's title deed or tabien baan (house registration), and the lease agreement.

Consider this example. You own a unit at Ideo Q Siam near BTS Ratchathewi and rent it to a Japanese professional for 28,000 THB per month. You live in Nonthaburi and do not want to trek to immigration every time your tenant returns from a business trip to Tokyo. You can give your tenant a signed letter authorizing them to file the TM30 on your behalf, either in person or online. According to Thai immigration data from 2023, approximately 1.2 million TM30 notifications were filed electronically through the bureau's online system, a significant increase from previous years. The system is getting more digital, which is good news for busy landlords.

How to File the TM30: Step by Step

There are three main ways to file a TM30 notification, and none of them are particularly difficult once you know the process.

The first option is filing in person at your local immigration office. For most Bangkok landlords, this means the Immigration Bureau headquarters at Government Complex in Chaeng Watthana, or the more convenient immigration office at IT Square Laksi near BTS Mo Chit area. You bring the completed TM30 form, a copy of the foreigner's passport and visa page, a copy of your Thai ID card, and proof of address such as a house book or lease agreement.

The second option is filing online through the Immigration Bureau's online notification system. You need to register for an account first, which requires a visit to the immigration office with your documents. Once approved, you can file TM30 notifications from your phone or laptop. This is the most popular method for landlords who manage multiple units.

The third option is filing by registered mail. You send the completed form and copies of all supporting documents to your jurisdictional immigration office. This method is rarely used because it is slow and you have no confirmation of receipt within the 24-hour window.

Let me give you a practical example. You own two condos, one at The Base Sukhumvit 77 near BTS Onnut and another at Lumpini Park Rama 9 near MRT Rama 9. Both are rented to foreign tenants. After registering online, you can file both TM30 notifications in about 10 minutes without leaving your home. Much better than spending a morning at Chaeng Watthana.

What Happens If You Do Not File?

The penalties for not filing a TM30 are real, and they can affect both you and your tenant. As the landlord, you face a fine of up to 10,000 THB for each violation. If the issue becomes a pattern, immigration officers can flag your property, which makes things harder for any future foreign tenants you bring in.

For your tenant, the consequences can be even more serious. Without a properly filed TM30, your tenant cannot complete their 90-day reporting, which is a separate but related obligation. They may also face difficulties when applying for visa extensions at immigration. Some expats have reported being turned away from the visa extension counter until the TM30 was sorted out, resulting in overstay situations that carry their own fines of 500 THB per day up to a maximum of 20,000 THB.

Think about it from your tenant's perspective. They are paying 35,000 THB per month for a nice one-bedroom at Siamese Exclusive Ratchada near MRT Huai Khwang. They take a quick weekend trip to Phnom Penh and come back on Sunday night. If you do not refile the TM30 by Monday night, you are technically in violation. Your tenant finds out three months later when they go to extend their work permit visa and get stonewalled at immigration. That is a terrible tenant experience, and it is entirely preventable.

TM30 Filing Methods Compared

Filing Method	Processing Time	Cost	Convenience Level	Best For
In Person at Immigration Office	Same day (plus waiting time)	Free	Low, requires travel and queuing	First-time filers, complex cases
Online via Immigration Website	Immediate to 24 hours	Free	High, file from anywhere	Landlords with multiple properties
Registered Mail	3 to 7 business days	Postage fees (approx 50 to 100 THB)	Medium, no travel but slow	Rarely recommended
Through Property Agent or Manager	Same day to 48 hours	Varies (500 to 2,000 THB service fee)	High, fully handled for you	Busy landlords, absentee owners

Common TM30 Mistakes Bangkok Landlords Make

The first and most common mistake is thinking TM30 is a one-time filing. It is not. Every time your foreign tenant re-enters Thailand, you need to file again. If your tenant at The Room Sukhumvit 69 near BTS Phra Khanong flies to Singapore for a long weekend, you file again when they return. The Thai Revenue Department already expects landlords to declare rental income, and immigration expects them to handle TM30. Owning a rental property comes with paperwork on multiple fronts.

The second mistake is not keeping copies of filed TM30 receipts. Your tenant will need the receipt number for their 90-day report. If you file and do not pass the confirmation along, your tenant is left scrambling.

The third mistake is assuming the condo juristic office handles it. Some large developments like Ashton Asoke or Noble Ploenchit do assist with TM30 filings as part of their building management services, but many do not. Always confirm directly with your juristic office. Do not assume they are filing on your behalf unless you have written confirmation.

The fourth mistake is ignoring the requirement entirely because "nobody checks." Enforcement has become significantly tighter since 2019, when immigration began digitizing their tracking systems. Officers at local immigration offices now regularly cross-reference TM30 filings when processing visa extensions and 90-day reports. The days of flying under the radar are largely over.

How Superagent Helps Landlords Stay Compliant

If you are renting your condo to expats in Bangkok, the TM30 is just one piece of the puzzle. You also need to think about setting the right rental price for your area (a one-bedroom near BTS Thong Lo typically goes for 20,000 to 45,000 THB depending on the building), screening tenants properly, drafting a solid lease agreement, and declaring your rental income correctly.

The good news is that none of this has to be overwhelming. The TM30 process, once you have your online account set up, takes just a few minutes per filing. Keep your documents organized, communicate clearly with your tenant about travel plans, and set calendar reminders to refile after each re-entry.

If you are a condo owner looking for quality tenants or an expat searching for a well-managed rental, Superagent at superagent.co makes the process easier with AI-powered matching and transparent listings across Bangkok's most popular neighborhoods. Whether you own or rent, having the right tools and information makes all the difference.