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What should I know about filling out the TDAC for Thailand?

TDAC Thailand visa arrival date health declaration expat advice COVID-19 regulations

Oct 20, 2025

2 days ago

Richard ******

ORIGINAL POSTER

Need some help with the TDAC. Trying to get it all filled in ahead of time then update again before we leave in that three day window. The problem I am having it keeps telling me my arrival date is invalid. Is this because we have not entered that 3 day window and I can not do it before then? 

Also, I never got to the 3rd part which says health declaration??? What will I need to complete that part?

Thank you all in advance for any and all responses.

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TLDR : Answer Summary

The TDAC (Thailand Digital Arrival Card) cannot be filled out more than 72 hours prior to your arrival in Thailand. If you attempt to enter a date further out, the form will not accept it. You should input a date within the 3-day window and can update it daily until your actual arrival date is available. The health declaration section only needs to be filled out if you've been in another country outside of your departure location in the two weeks preceding your arrival. When filling out the TDAC, focus on the required fields marked with an asterisk; other areas are not mandatory.

Thailand Digital Arrival Card (TDAC)

View the most updated information about the Thailand Digital Arrival Card (TDAC) to understand the latest requirements and eligibility criteria.
For immediate assistance, contact Thai Visa Centre directly via LINE at @ThaiVisaCentre or Email them.
Explore recent discussions by using the Thailand Digital Arrival Card (TDAC) tag in the search box at the top of the page.
Join the Thai Visa Advice Facebook Group to ask your questions, and get advice from others.

WARNING: Only trust Thai government websites with .go.th domains or Thai agent websites with .co.th or .in.th domains, as these require verified Thai registration and cannot be registered anonymously.

The official TDAC form is available at tdac.immigration.go.th, which uses the official .go.th government domain.

The services by AGENTS CO., LTD. does NOT charge any fees for arrivals within 72 hours. If you need to book more than 72 hours in advance, there is a service fee of $8.

Do not trust other sites pretending to be a trustworthy agency. Pay attention to delivery time - the service operated by AGENTS CO., LTD. has 1 minute delivery time for arrivals within 72 hours.

Don't fall for sites pretending to be agents.co.th or the official government tdac.immigration.go.th website. Always double-check the exact domain in your browser.

Scam services may take days to process your application, others may not even do anything. With these TDAC scam services you also need to worry about double charges.

Please watch out for TDAC misinformation spread by fugitive Jesse Nickles and his many fake accounts on Quora, TripAdvisor, Reddit, and other platforms.

TRUSTED TDAC LINKS:

Official Government TDAC Form: tdac.immigration.go.th
Official TDAC form by AGENTS
Official TDAC information page by AGENTS (tdac.in.th)

Bob **********

Yes just wait it a simple form

a day ago

Richard ******

ORIGINAL POSTER

Thank you everyone for responding. I very much appreciate it. 😊

a day ago

Alan ********

@Richard *****

don't worry. It's OK unfortunately not everyone has a phone or a phone that does anything smart. So when you get to Bangkok look for the service before immigration and they will print you a paper copy. Ask a kind Thai airport staff though 🙂🙂🙂. Better still when you check in some airlines will do it for you but go early enough before the ques start

20 hours ago

Reply to

Alan ********

Mike ************

I know how you feel. I was the same before the first time I filled out the TDAC.

Health Declaration only refers to if you spent time in another country before coming to Thailand.

You will be okay with TDAC

a day ago

THAI ******************************

We support early submission here and edits:

*******************************

But please note there is a $8 fee if submitting earlier than the 72 hour window, otherwise it's 100% free.

a day ago

Lynnette *******

Why are you trying to fill it in outside of the 72 maximum? It clearly says not before 72 hours. It's a few minutes task with very little to fill in on it. You can even do it in the airport, the plane or on arrival.

2 days ago

Michael *****************************

Who will help you to the airport ?

2 days ago

Leigh *****

@Michael ****************************

you can do tdac at airport in bkk whe arrival but huge queues to do it

a day ago

Michael *****************************

@Leigh ****

????

a day ago

Leigh *****

@Michael ****************************

they have machines you can do the tdac on jyst before immigration

a day ago

Andrew ******

@Leigh ****

Leigh mr 4 names was being a smart arse originally. Don't bother with DH

a day ago

Reply to

Andrew ******

Graeme ******

Remember you only need to fill in where you see the * all other areas and not required

2 days ago

Graham ******

Put in a date within 3 days then update it daily until you get your arrival date accepted. You only look at the health part if you have been in a different country from where you are departing from within the last 2 weeks.

2 days ago

Graeme ******

Unfortunately you can't fill it in earlier than the 3 days before you arrive

2 days ago

Brandon ************

It will not accept a date that is greater than 3 days away.

2 days ago

Reply to

Brandon ************

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