Use the application website

Thai applicants apply for Inter-Portfolio 1, Inter-Portfolio 2 and the BIR written exam on the BIR admission website at admission.polsci.tu.ac.th (opens in a new tab). You create an account, fill in the form, upload your documents, submit, then pay. You cannot edit an application after you submit it.

Before you start#

• Choose your round in Compare the admission rounds.
• Register on myTCAS (opens in a new tab).
• Scan your documents, certified and legible.
• Keep your SAT or English test details to hand, including the test date and when the score expires.

Applicants who are not Thai do not use this website. They use a Google Form. Read Apply if you are not Thai.

Thai applicants do not use the website for TCAS 3 itself. Apply for TCAS 3 on myTCAS after the written exam. Read Apply through TCAS 3 and the BIR written exam.

Apply for Inter-Portfolio 1 or 2#

The BIR office publishes a guide, How to apply to the BIR programme (opens in a new tab), revised in September 2026. It is in English and mostly screenshots. These are its steps.

1. Go to admission.polsci.tu.ac.th (opens in a new tab).
2. Sign up or log in. You can use a password, a passkey, Google or LINE.
3. Select Apply to the BIR PROGRAM, then choose Inter-Portfolio 1 or Inter-Portfolio 2.
4. Fill in the required information and upload your documents. The form has sections for your personal details, documents, scores, a questionnaire, and a review and submit step. For SAT scores, enter your test date and the date your score expires.
5. Confirm your application. You cannot edit it after you submit. The website gives you reference numbers for the payment.
6. Pay the application fee.
7. Print your application form after the BIR office accepts your payment. Bring it to the interview.

The Inter-Portfolio 1 application window runs from 09:00 on 6 October to 23:59 on 6 November 2026, Bangkok time. Inter-Portfolio 2 closes on 24 January 2027.

Pay the application fee#

The application fee for Inter-Portfolio 1 and Inter-Portfolio 2 is 1,000 baht. It is not refundable.

You can pay in either of these ways.

• Print the bill and pay at any Bangkok Bank counter.
• Scan the QR code on the bill with any bank app.

For Inter-Portfolio 1, you must pay by 23:59 on 7 November 2026.

Apply for the BIR written exam#

These steps come from the BIR written exam guide for the 2026 exam. The screens may differ in 2027, so follow the instructions on the website when applications open.

1. Go to admission.polsci.tu.ac.th (opens in a new tab) and create an account. Enter your details and select Register.
2. Sign in and select Apply to the BIR program, then the BIR written exam.
3. Fill in your personal information, then your education history. Add your qualification, for example high school diploma (มัธยมศึกษาตอนปลาย ม.6), GED or equivalent, or International Baccalaureate.
4. Enter your English test and upload your documents. You upload your ID card or passport, transcript and student certificate. Check every file, because you can submit attachments only once.
5. Select the printout, then pay the exam fee of 500 baht at a bank counter or by QR code in a mobile banking app.
6. Check your payment status 3 to 7 business days after you pay.
7. Check My application to see your status.

The application window runs from 2 to 17 February 2027.

Ask the BIR office#

Email bir@tu.ac.th or call 02-221-6111 ext. 3409. Contact the office if you cannot sign in or your payment does not show.