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What are the requirements for traveling to Cambodia and re-entering Thailand with a non-O visa?

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Rudi ***********
asked Sep 24, 2025
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I am coming to Thailand with a non-O visa, valid for 90 days, applied from Belgium. I must complete the TDAC form no later than three days before arriving in Thailand. Upon arrival in Thailand, I must report to immigration within 24 hours with a TM30 document. With my passport and proof of residence, I can open a bank account with the aim of applying for a one-year extension. My question: If, during my 90-day stay in Thailand, I travel to Cambodia with my girlfriend for a week and then return to Thailand, do I need to complete a new TDAC form before arriving in Cambodia and also before returning to Thailand? Do I need to have a new TM30 document completed upon returning to Thailand? Will my non-O visa remain valid? Do I need to report to immigration again? Thank you in advance for the information.
Answer summary
When leaving Thailand on a non-O visa, it's important to note that it is a single entry visa. Upon exit, the visa is considered used, and re-entry requires a re-entry permit to maintain your original entry status. Each time you enter Thailand, whether initially or upon returning from Cambodia, you must complete a new TDAC form, which is required for every arrival. Additionally, your accommodation must file a TM30 document each time you return to Thailand, noting your stay. If you do not obtain a re-entry permit and travel outside Thailand, you'll need to apply for a new visa upon return.
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Glenn *******
Glenn *******
Have the right visa already to extend for a retirement visa I wouldn't be jeopardizing it by going to Cambodia have you seen the problems they're having with Thailand at the moment bad idea
Dylan ********
Dylan ********
@Glenn ******
i’m not sure you can even get into Cambodia from Thailand right now
Nongnuch ********
Nongnuch ********
@Dylan *******
land borders are closed. However you can still fly
Simon *********
Simon *********
Stuart Cumming the tdac is a thai arrival card, no need to complete for entry to cambodia, but will need to do on re-entry to Thailand. Gives you something to do while sat waiting for your flight...

The TM30 needs to be filed every time you return home, if a TM30 has been filed at a hotel somewhere else in Thailand, or if you leave and re-enter thailand.
Stuart *********
Stuart *********
@Simon ********
Didn’t read the bit about before entering Cambodia, just read it as on return.

The TM30 bit is dependent on the immigration office. Some insist if you stay in a hotel and return home, some only if you go overseas and return home and some don’t care if you’re returning to your home whether you’ve stayed in a hotel or returned from abroad.

I don’t know the policy for Udon Thani.
Simon *********
Simon *********
@Stuart ********
It used to be if you stay out of province, overnight, but now it's whenever the system gets updated, for example, when a hotel takes your passport and files a tm30, the system gets updated with their address, so needs re-updating with your home addresd when you get home. Only really an issue for 90 day reports or bank and driving license applications.

I use my Pink ID at hotels in Thailand, rather than my passport, so no need to file a TM30 when I get home. Many hotels accept Thai driving licenses as ID
Stuart *********
Stuart *********
@Simon ********
Again it’s office dependent. In Phuket for example the need a new filing if the system has been updated as you state. In some other offices they don’t.
Ant ***********
Ant ***********
Non-O is valid for one entry

If you leave Thailand during the 90 days

It becomes useless
Graham ******
Graham ******
@Ant **********
unless you purchase a re-entry permit before leaving
Lynnette *******
Lynnette *******
The TDAC is completed for every arrival. It's an arrival card.
Steve *******
Steve *******
TDAC is no earlier than 3 days not later than 👍
Lynnette *******
Lynnette *******
TDAC is free and completed no earlier than 72 hours. So between 72 hours and landing, because there are desks where you can complete it at the airport in thailand. It is much better to do before you fly.
Jim *******
Jim *******
@Lynnette ******
My last trip to Thai (July 3. 2025) , I saw about 20 people doing their TDAC on the spot. There were 4 ATM like machines for that. Possible, functional but less convenient than if you had it before entering Thai.
Daniel ******
Daniel ******
Contact a travel agent!
Roberto *********
Roberto *********
@Daniel *****
First dumb comment of the day!
Stuart *********
Stuart *********
@Daniel *****
And how would that help the OP?
Stuart *********
Stuart *********
Your 90 day visa is a single entry visa. Once you enter Thailand you no longer have a visa. It’s used. Finished.

What you have is an entry stamp allowing you to stay for 89 further days (entry day is day 1).

If you want to leave and keep that entry stamp “alive” you’d need a re-entry permit. On return you’d be stamped in for the exact date you were originally given.

Each entry needs a TDAC. Each time you return your house owner (or hotel) should in theory file a TM30.
Rudi ***********
Rudi ***********
OP
@Stuart ********
where can I get a re-entry permit
Robert *****
Robert *****
@Rudi **********
at the airport immigration office, not cheap, single entry is around 1200, multiple entry 4000. A better plan might be to settle your 1 year Non O extension first and include multiple entry. Then you're free to go when and where you please, and have everything done in one shot.
Stuart *********
Stuart *********
@Rudi **********
At a local immigration office or if flying out via an international airport then at the airport itself just before you fly.
Stuart *********
Stuart *********
@Rudi **********
You can get a re-entry permit at anytime prior to leaving. If that’s day one or on the day you fly doesn’t matter. If you do it at an immigration office they’ll probably want to see that you’ve had a TM30 filed. If at an airport they won’t care.
Stuart *********
Stuart *********
@Rudi **********
You don’t have to report to immigration. Your house owner reports you as staying at their property (TM30). If it’s a hotel they’ll usually do it by default. If a private house then that house owner can either report in person to your local office or just do it online which takes a couple of minutes.
Rudi ***********
Rudi ***********
OP
@Stuart ********
I have to report to immigration within 24 hours with the TM30 form, so I can immediately apply for a re-entry permit.

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