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Thailand TDAC 2026: Complete Guide + Mistakes That Block You at Immigration
What Is the TDAC (Thailand Digital Arrival Card)?
The TDAC is Thailand's digital arrival card. It replaced the old paper TM6 form travelers used to fill out on the plane or at the immigration counter. Since its rollout, every traveler entering Thailand, by air, land, or sea, must submit it before arrival.
The TDAC collects:
Your passport and personal details
Your flight or transport information
Your accommodation address in Thailand
Basic health information
It is not a visa. It doesn't grant entry on its own, it's a mandatory declaration submitted in addition to your visa or visa-exempt status.
Who Needs to Submit the TDAC?
Nearly all travelers entering Thailand, including:
Visa-exempt travelers (many nationalities can stay 30–60 days depending on bilateral agreements)
Travelers with an eVisa or standard visa
Thai residents returning from abroad, in most cases
When Should You Submit Your TDAC?
This is where most travelers get tripped up:
The TDAC can be submitted up to 3 days before arrival, not earlier
It must be completed before you go through immigration
Submitting too early usually isn't accepted by the system
If you're traveling on short notice, this timing matters even more, better to handle it calmly a few days ahead than rush it at the airport.
What Information You'll Need
Passport: full name as printed, number, nationality, expiry date
Flight details: flight number and arrival date
Accommodation address in Thailand (hotel, guesthouse, residence)
Contact details: email and phone number
Basic health information, if currently required
Having all of this ready before you start is what prevents most errors.
How to Fill Out the TDAC: Step by Step
Access the official TDAC portal (or use an assistance service)
Enter your passport and personal details exactly as printed
Enter your flight details and arrival date
Enter your accommodation address in Thailand
Complete the health section if required
Review every field before submitting, passport number or name typos are the top cause of rejection
Submit and save your confirmation, a QR code is usually issued and should be presented on arrival
Common Mistakes That Block Travelers at Immigration
Submitting outside the 3-day window
Name mismatch with the passport
Incomplete or incorrect accommodation address
Wrong flight number or arrival date
Confirmation QR code not saved or accessible offline at the airport
Any of these can trigger extra screening, an on-the-spot resubmission, or in serious cases, entry denial if the mismatch involves identity.
Applying Yourself vs. Using an Assistance Service
You can submit the TDAC yourself for free through the official channel, entirely reasonable if you're comfortable with online forms and have time to double-check everything.
An assistance service makes sense if:
You're short on time before departure
You're not confident navigating a government portal, especially not in English or Thai
You're traveling as a family or group and want every submission checked
You'd rather have a second set of eyes on your declaration before it's sent
TDAC for Families and Groups
Every traveler, including children, needs their own TDAC submission, passports generally can't be bundled under one form. Plan ahead if you're traveling with others, so you're not doing it last-minute at the airport.
Frequently Asked Questions
Is the TDAC free?
The official submission is free. An assistance service may charge a fee for checking and handling your submission.
Does the TDAC replace my visa?
No. These are separate: the visa grants entry, the TDAC is an additional arrival declaration.
What if I make a mistake after submitting?
Depending on the error, you may need to resubmit, double-check every field before sending.
Can I complete the TDAC from my phone?
Yes, the portal is mobile-friendly and most travelers complete it shortly before their flight.