Thailand mandates TDAC filing for all non-Thai arrivals 3 days before entry

What THIM actually does today

Thailand's Immigration Bureau runs THIM, the Thailand Immigration Management app, as the digital front end for arrival procedures and a handful of related immigration services for foreigners. The app handles digital arrival cards, group submissions, trip management and smart notifications, per its official listing, which was last updated June 8, 2026.

THIM works alongside the Thailand Digital Arrival Card (TDAC), the mandatory online form every non-Thai national must submit before entering the country. Reports point to a broader THIM expansion in August 2026 covering immigration appointments, a tourist police hotline and other services, though no page on the Immigration Bureau's main site spells out a blanket "mandatory for all foreigners" cutoff in those exact terms.

Who gets pulled in

The TDAC requirement already hits every non-Thai national arriving by air, land or sea. Tourists, business travelers and transit passengers all file the same form and it isn't a visa, the bureau notes.

Expats, long-stay retirees and digital nomads stand to feel the bigger shift if THIM absorbs visa extensions and the 90-day address report that long-stay foreigners already owe immigration. Group filings through THIM matter for families and travel companions moving together.

How to file and what it costs

The TDAC must be submitted online within three days before arrival. The official guide lists what filers need:

• Passport details
• Personal information
• Travel itinerary
• Accommodation address in Thailand
• Health declaration, when applicable

Completed cards can be downloaded or printed from email and submissions can be done individually or as a group. Neither the TDAC guide nor the THIM app listing shows a fee for the digital arrival card itself. Standard visa-extension and immigration-service charges still apply under existing rules and aren't billed as THIM-specific.

Long-stay foreigners should keep tracking their 90-day reporting obligation directly with immigration until THIM's expanded functions are confirmed live. Travelers heading to Thailand before August should file the TDAC in the three-day window and keep a printed copy at the border.

Read our full Thailand guide for the complete picture.