Thailand’s Immigration Bureau has officially launched THIM (Thai Immigration Application), a digital gateway app for foreign nationals travelling to or staying in Thailand, following a pilot phase since August 1, 2026. By September, the app had already recorded over 600,000 downloads.
Currently, THIM lets travelers submit the Thailand Digital Arrival Card (TDAC) and browse Explore Thailand travel information directly from the app. It consolidates TDAC and other immigration services into one platform — travelers don’t need to submit arrival information twice, and can use either the traditional TDAC website or THIM to fulfil the mandatory requirement of submitting arrival information within three days before arriving in Thailand. The Immigration Bureau plans to add further services over time, including immigration appointment booking, certificates of stay, visa extensions, 90-day reporting, and Visa on Arrival processing.
Why This Matters for Travelers
THIM is currently optional, not mandatory — it’s an alternative channel to the existing TDAC website, not a new requirement layered on top of it. For travelers who already find the TDAC website workable, nothing changes yet. But as the Immigration Bureau adds visa extensions, 90-day reporting, and appointment booking to the app over time, it’s likely to become the more convenient way to handle Thailand immigration tasks that currently require an in-person visit or a separate web portal.
What Travelers Should Do
You can keep using the TDAC website exactly as before if that’s simpler for your trip — there’s no need to switch. If you’d rather try the app, download THIM from your phone’s app store ahead of arrival and submit your TDAC through it instead of the website; the underlying three-day-before-arrival requirement is unchanged either way. Longer-stay visitors and anyone planning visa extensions or 90-day reporting during their time in Thailand may want to keep an eye on THIM as more services roll out, since it could eventually simplify tasks that currently require visiting an immigration office.
FAQ
What is THIM?
THIM (Thai Immigration Application) is Thailand’s official immigration app for foreign travelers, launched by the Immigration Bureau after a pilot phase that began August 1, 2026.
Is THIM mandatory for entering Thailand?
No. THIM is optional. It’s an alternative way to submit the Thailand Digital Arrival Card (TDAC); the official TDAC website still works exactly as before.
Does THIM replace the TDAC website?
No, it doesn’t replace it — both channels submit to the same system, so you only need to complete the arrival card once, through whichever one you prefer.
What can THIM do right now?
Today, THIM handles TDAC submission and provides Explore Thailand travel information. The Immigration Bureau has said it plans to add immigration appointment booking, certificates of stay, visa extensions, 90-day reporting, and Visa on Arrival services in future updates.
Do I still need to submit my arrival information within three days of arrival?
Yes. That requirement hasn’t changed — THIM just gives you a second way (via app instead of website) to meet it.
Plan Your Thailand Trip
The THIM app is one of several recent changes to how travelers enter and move through Thailand. Our Thailand Visa Guide covers e-visas, visa exemptions and extensions, and our article on Suvarnabhumi Airport’s expanded e-gates explains another recent change worth knowing before you fly in.
Sources
ExpatGo, September 27, 2026 — Thailand Launches THIM App to Simplify Immigration for Foreign Visitors.