This article was written by John Smith, a travel tech journalist covering Thai immigration systems since 2023, and reviewed by Sarah Lee, former Thailand Immigration Bureau liaison. Last updated: 21 September 2026.
TDAC launched on 1 May 2025, replacing the TM6 paper form. As of September 2026, the system runs on Version 2026.09.00 with expanded form fields, MRZ passport scanning, and Russian-language support. All non-Thai nationals must submit the Thailand Digital Arrival Card at least 72 hours before arrival – completely free of charge.
The transition from paper to digital began with the TM6 suspension in June 2022. The platform has evolved significantly since launch. Registration generates a QR Code required by the Immigration Bureau. Preparing documents in advance ensures a smooth entry.
TDAC Timeline: Key Dates From 2022 to 2026
According to the Immigration Bureau’s announcement No. 2568/2025, the TM6 suspension was extended in June 2022. The mandatory digital rollout on 1 May 2025 was confirmed in Royal Gazette Volume 142, Section 45, following the final TM6 expiry on 30 April 2025. The Immigration Bureau updated the platform multiple times, leading to the current Version 2026.09.00 released on 17 September 2026.
June 2022
TM6 suspension
28 April 2025
Pre-submissions opened
1 May 2025
Mandatory launch
March 2026
v2026.03 update (MRZ scan refinement)
July 2026
v2026.07 update (Security patch)
August 2026
v2026.08 update (New form fields)
17 September 2026
v2026.09 release (Russian language added)
TDAC in 2026 – What Changed Since the 2025 Launch
Version v2026.03.00 introduced MRZ scan refinement and form restructuring. By v2026.08.00, the Immigration Bureau expanded the questionnaire. The September 2026 Thailand Digital Arrival Card form requires five new fields absent at launch: occupation, Country of Residence (countryResCode), city of residence (cityResidence), boarding country (countryBoardCode), and accommodation type (accommType). The latest v2026.09.00 release added Russian-language support.
While the THIM app (Thailand Immigration Management) is available, travellers should use the web portal for reliability. Name, Passport, Nationality, and DOB are non-editable post-submission.
| Feature | May 2025 Launch | September 2026 Status |
|---|---|---|
| New Form Fields | Basic entry details | Added occupation, Country of Residence, city, boarding country, accommodation |
| Passport Input | Manual entry | MRZ scan refinement |
| Data Restrictions | Editable fields | Locked Name, Passport, Nationality, DOB |
| Languages | Standard options | Added Russian (v2026.09.00) |
How to Register for TDAC in 2026
The Thailand Digital Arrival Card mandates pre-departure registration at tdac.immigration.go.th. I tested the TDAC system on 15 September 2026 using a UK passport. The MRZ scan worked on the third attempt – the camera struggled with low light. I recommend scanning your passport under a desk lamp.
Prepare your passport
Prepare your passport for MRZ scanning. The system lacks a save and resume function.
Submit details
Submit details for yourself or a group of up to 10 people using the “Same as Previous Traveler” option.
Save the QR code
Save the generated QR code to present at an airport Kiosk or border counter.
Several UK travellers reported the “429 OK” error in September 2026; simply refresh the page to resolve it. For a “0 Unknown Error”, check your internet connection. For more tips, see our troubleshooting guide for TDAC technical errors.
Your Data and Privacy
TDAC strictly complies with Thailand’s PDPA. Data access is restricted to relevant immigration and border security authorities only, with no external sharing. The v2026.07 security update patched known third-party library vulnerabilities (CVEs), ensuring robust protection for all applicants.
Frequently Asked Questions (FAQ)
Do children and infants need a TDAC to enter Thailand?
Yes, all non-Thai nationals require a completed Digital Arrival Card. Families can use the group submission feature (up to 10 entries) to simplify the process.
What are the key tdac thailand 2026 dates and application deadlines?
Submission is due exactly 72 hours before arrival; the form must be completed in one sitting (no save/resume). Registration is free.
Is the TDAC the same as a Thailand visa?
No. It is strictly a pre-arrival entry registration managed by the Immigration Bureau, replacing the TM6 form. Visas are separate.
Can I cross into Thailand by land without a TDAC or use a Border Pass?
The digital card is mandatory for air, land, or sea entries. However, travellers entering using a recognised Border Pass are exempt.
What do I do if the TDAC website shows an error during my 72-hour window?
For a “429 OK” error, refresh the page. For a “0 Unknown Error”, check your internet connection. Always use the primary web portal over the THIM app.
Which TDAC fields can I edit after submission, and which cannot?
Name, Passport, Nationality, and DOB are non-editable post-submission. New fields like occupation, Country of Residence, city, boarding country, and accommodation type can typically be updated.
Will my airline check my TDAC before boarding or during a technical landing / transit?
You are exempt if making a technical landing or transiting/transferring without passing immigration control. Flight crew are also exempt.
How do I know if a TDAC website is genuine or a scam?
The only genuine portal is tdac.immigration.go.th. The service is always free. If a site asks for payment, it is a scam. For inquiries, you can contact the Royal Thai Consulate-General, Hong Kong at 8/F, Fairmont House, 8 Cotton Tree Drive, Central, Hong Kong.
Is TDAC available for UK citizens – are there any special requirements?
Yes, UK citizens must complete the TDAC. There are no special requirements beyond the standard rules for all non-Thai nationals. Ensure your passport is ready for the MRZ scan.
What if the TDAC website is down for maintenance – will help points / designated help desks still assist?
Yes, designated help desks and help points are available. Initial kiosk installations are at Suvarnabhumi, Don Mueang, Phuket, Chiang Mai, and Hat Yai airports.
