The app is designed to make arrival information easier to prepare before a trip. You can still use the official TDAC website if the app does not work properly on your phone.

How Thailand's THIM App and TDAC work together

![Traveler using a phone to open the THIM App before a trip to Thailand]

Thailand's THIM App and TDAC work together for foreign travelers. The app gives you another way to complete the digital arrival process, while TDAC is still required for foreign travelers entering Thailand, with an exception for airport transit.

Think of TDAC as the requirement and the THIM App as a tool that helps you prepare your arrival information. Whichever route you use, make sure the TDAC submission is completed before you travel. You can find more trip preparation guides in the Thailand travel planning hub.

What the THIM App can do

THIM stands for Thailand Immigration Management. It allows travelers to enter passport and trip information before arriving in Thailand.

The app can scan a passport with a phone camera and automatically read its details, but you must check the information carefully. A misread letter or number is easy to miss, so compare each field with your passport page.

You may need to add your accommodation address and travel purpose. Group registration can include up to 10 people, and the process is described as taking about 3 minutes on average.

Group registration can be helpful when you travel with family or friends, but every traveler's passport details still need to be correct.

Who must submit TDAC

![Foreign traveler holding a passport at an airport arrivals hall in Thailand]

Foreign travelers entering Thailand by air, land, or sea must submit TDAC. This includes travelers entering under visa exemption rules or with a visa on arrival, as well as children and infants.

You do not need TDAC when you remain in airport transit without passing through immigration or leaving the airport. If you leave the airport during transit and pass through immigration, you must submit TDAC.

Because the requirement covers every entry route, a land or sea crossing is treated the same as arriving by plane. If you travel as a family, remember that children and infants are included, so plan the submissions for everyone in your group. Check Thailand Immigration Bureau information again before you travel, because entry requirements can change.

When and how to submit TDAC

You can submit TDAC only within 3 days before your arrival date. For example, if you arrive on the 10th, the submission window runs from the 8th to the 10th. Because the window is short, set a reminder for the day it opens so you do not miss it.

A separate submission is needed for each new trip because the card applies to a single entry. Keep this in mind if you plan to leave and re-enter Thailand during the same holiday.

Use the official TDAC website or the THIM App, then choose the arrival card option. Enter the required information in English and check any passport details read by the camera before submitting the form.

Information to prepare for TDAC

![Phone showing a Thailand Digital Arrival Card form beside a passport on a table]

The form may ask for the following details:

• •Passport number, nationality, and personal information.
• •Thailand arrival date.
• •Flight number or vehicle number.
• •Hotel or residential address in Thailand.
• •Main purpose of travel.
• •Countries visited during the 2 weeks before arrival.
• •Health information when required.
• •Email address for receiving the QR code.

After submission, the QR code is sent by email. Keep it on your phone and consider saving a screenshot in case your battery runs out or your internet connection is unavailable.

Have your flight or vehicle details ready before you start, because they are easy to forget until you check your booking. If you land in Bangkok, read this guide to Bangkok airport customs rules before you go.

Correcting information and avoiding fees

You can use the update arrival card function if details such as your flight or accommodation change. If your name, nationality, or date of birth is wrong, submit a new card. The latest form submitted is treated as the valid form.

TDAC submission is free. Be careful with websites or agents that request a service fee or government charge. Check the spelling of the official website before entering your passport details.

Look-alike websites are a common trap for travelers, so slow down before you enter personal data. You can also read about these common Thailand travel mistakes to avoid on your trip.

Have a question about your trip? Contact AsiaBuddy.

Frequently Asked Questions

Does the THIM App replace TDAC?

No. The THIM App provides another online method for preparing the arrival card, but foreign travelers who must submit TDAC still need to complete it.

When can I submit TDAC?

You can submit TDAC within 3 days before your Thailand arrival date. You cannot submit it earlier than that window.

Do children need TDAC?

Yes. Children and infants entering Thailand are included in the TDAC requirement.

Is TDAC free?

Yes. The official submission process is free, so be cautious if a website or agent asks for payment.

Do I need TDAC for airport transit?

No, not if you stay in airport transit without passing through immigration or leaving the airport. If you pass through immigration, you must submit it.