If you've got a flight to Thailand coming up — whether you're here for a two-week holiday or, like me, you live here — there's a new development worth knowing before you leave. It's called THIM, and it's the first real official app from Thai immigration.

It's not yet another site charging you to fill in a form: it's the Immigration Bureau itself bringing the whole entry procedure inside your smartphone.

I'll explain it the way I'd explain it to a mate across the table, no frills: what it is, what it'll do, and above all the question that matters to you right now — can I already use it today for the arrival card? Yes. But with a couple of precautions the others won't tell you about.

What THIM is (and where it comes from)

THIM stands for Thailand Immigration Management System. It was officially unveiled on 28 May 2026 at the AWS Summit in Bangkok, and it was developed by the Thai company Digital Identity Co. together with the Immigration Bureau, on Amazon Web Services cloud infrastructure hosted on Bangkok servers. Translation: the data stays in Thailand, it doesn't end up who knows where.

The Bureau describes it, in no uncertain terms, as immigration's future "super app". The idea is ambitious: a single application, mobile and web, through which every foreigner manages their relationship with Thai immigration. Today it starts from the simplest piece — the arrival declaration — but the design is far bigger.

One figure to grasp the stakes: Thailand welcomes around 30 million foreign visitors a year, and in 2025 Bangkok came out as the most visited city in the world by international arrivals. Until yesterday every single person had to fill in forms and queue. THIM was created to wipe out those queues.

How it actually works

The heart of THIM is speed. Until now, anyone entering Thailand had to fill in the TDAC (the digital arrival card, more on that shortly), re-entering all the fields — around twenty of them — every single trip. A well-known nuisance, especially for anyone who goes in and out of the country often.

With THIM the logic changes. You create your profile just once: the app uses an e-KYC verification system that scans your passport and reads your details straight off the document, cutting down typos. From then on, each new trip you only update the few things that change — flight number, return date — and away you go. The Bureau talks about the form dropping to around three minutes the first time, and one or two minutes on later trips.

No QR code to show at the desk. Your data syncs with immigration's systems, and the officer simply sees it by scanning your physical passport.

No slips of paper, no screens to hunt for in a panic while the queue behind you huffs.

Right now the app supports English, Russian, Japanese and Chinese, with the stated goal of reaching 15 languages by the end of 2026. English has you covered from day one. And it's completely free: if anyone asks you to pay to use it, it's a scam.

TDAC and THIM: don't mix them up

Let's clear this up, because there's a fair amount of confusion out there and I want you leaving this article with it straight.

The TDAC (Thailand Digital Arrival Card) is the digital arrival card, mandatory since 1 May 2025 for all foreigners entering Thailand by air, land or sea. It retired the old paper TM6 form, the one they used to hand you on the plane. It has to be filled in within the 72 hours before arrival, and the official channel is the tdac.immigration.go.th portal.

THIM doesn't replace the TDAC: it absorbs it. Put simply, the TDAC is what you have to declare; THIM is one of the ways to do it — the most convenient one. They're linked, not in competition.

The real question: can I do the TDAC from the app today?

Yes, from today you can. The app is already downloadable in its pilot phase and its current function is exactly that — letting you enter your arrival details before landing. You fill everything in on THIM, you get to the desk, the officer scans your passport and finds you already in the system. That's how it works, right now, not from some distant date.

That said — and here I'm speaking as someone who lives on the ground and knows how Thai rollouts go — there are two things to keep in mind, because we're in the pilot phase and the full launch is set for 1 October 2026.

First: always save a screenshot of the confirmation. THIM is designed to sync on its own, but it's a young system. At smaller airports, or if a desk isn't perfectly up to date, having the confirmation to hand gets you through in two seconds instead of leaving you stuck. It costs nothing and covers you 100%.

Second: don't double-file. Either you use the app, or you use the web portal — not both for the same arrival, otherwise you generate a duplicate that can muddle the data. Pick one channel and stick with it.

In practice, here's the golden rule for your next trip:

What THIM will become (the part that matters to expats)

If you're a tourist, the arrival card is all you need to know. But if you live here or you're thinking of moving over, the real scoop is something else.

The Bureau has said it wants to turn THIM into a single platform for all the bureaucracy of a foreigner in Thailand. On the table are functions like the 90-day reporting (the notorious report every 90 days), visa extensions and booking appointments at immigration offices, all straight from your phone. For anyone who knows the mornings lost queuing at immigration, this is a far bigger revolution than the arrival card.

A word of caution: there are no confirmed dates for these functions yet. They're the stated plan, not today's reality. But it's the direction of travel, and it's why it's worth keeping an eye on THIM from now.

One last piece of context, to keep well apart from the app itself: in parallel the Thai government is reviewing its entry rules, with the possibility of cutting visa-free stays from 60 to 30 days for travellers from many countries. It's a separate matter from THIM, but if you're planning a long trip or a move, put it on your radar.

In two lines

THIM is Thai immigration's new official app. From today you can already use it to do your arrival card (TDAC) from your phone: you fill it in once, they scan your passport at the desk, no QR code. It's free, it's in pilot phase until October 2026, and in the future it'll become the "super app" for visas and 90-day reporting. The smart move: use it, but save the screenshot of the confirmation until the system is fully bedded in.