The story
Traveler Intelligence · Thailand · Verified 18 September 2026
Thailand's Digital Arrival Card (TDAC) is free, is not a visa, and must be submitted within the three days before arrival, including the day you arrive. The practical trap is repeat travel: it is valid for one arrival on the date entered, so a new TDAC is needed every time a non-Thai traveller enters Thailand again.
That makes TDAC a short pre-departure task, not a document to complete when a trip is first booked. Thailand's Immigration Bureau says all non-Thai nationals entering by air, land or sea must submit it, while passengers making a technical landing or transiting without passing immigration do not need it.
The window is short on purpose
The official service allows a submission up to three days in advance, not months ahead. Have the passport details, arrival date and flight or vehicle information, accommodation address in Thailand, travel purpose, health-declaration information and an email address ready. The guide says entries must be in English.
That timing can feel inconvenient for a family building an itinerary well ahead. But an early form would also lock in details that are often the first to change: a flight number, the first night’s address or a last-minute routing adjustment. The better approach is to make a pre-flight reminder rather than treating a confirmation from an earlier visit as reusable.
The TDAC guide says submitted details can be updated before travel, but it specifically lists full name, nationality/citizenship and date of birth as fields that cannot be changed. Recheck passport data after using an MRZ scan; a quick scan is useful only if it matches the document in hand.
Free does not mean optional — or sufficient
The official TDAC service says there is no fee. It also says the card is not a visa. Those two points answer different questions: travellers may still need a visa depending on nationality and travel purpose, and a submitted arrival card does not decide whether an immigration officer permits entry.
For a group, the official system permits up to 10 entries in one submission. Children and infants are included in the requirement. A group filing can reduce repetitive typing, but each person’s passport and trip details still need to be correct. It is not a single family-wide entry permission.
The useful counterpoint is that a completed TDAC should not become a reason to relax the rest of entry planning. Passport validity, visa eligibility, onward-travel evidence and any requirements tied to a traveller's nationality or purpose remain separate checks. The unresolved question for a traveller who changes plans is not whether the card exists, but whether every detail still matches the journey actually being taken.
Sources and evidence status
> Independent editorial coverage. No affiliate links, paid placement or commercial partnership.
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> This is not immigration or legal advice: use official Thailand guidance for the passport and purpose of travel in question.