The personal identification number is important for everyday purposes in Swedish society and therefore it is essential for you to get informed about:
The personal identification number is a 4-digit number following your date of birth in the format: YYMMDD-XXXX. It is obtained when you are registered in the Swedish population register.
It is widely used for everyday purposes in Swedish society such as dealing with authorities, accessing health care, applying for a Swedish ID card, accessing banking services, joining an insurance plan, setting up memberships and subscriptions etc.
The personal identification number issued by the Tax Agency should not be confused with the temporary registration number, a 4-digit number following your date of birth containing the letter ‘T’, given to you by KTH when you were admitted. Format of T-number: YYMMDD-TXXX
International students who have a residence permit for at least 12 months or are admitted to studies for 13 months or more, can apply for a Swedish personal identification number from the Swedish Tax Agency, Skatteverket. You need a registration certificate in order to prove that you are enrolled as a student in Sweden. Consequently, you can not apply before you have registered as a student at KTH.
Students admitted to one or two semesters, i.e. students who have a residence permit valid for 12 months or less cannot apply for a personal identification number.
If you are eligible to apply for a personal identification number, please visit the Swedish Tax Agency website
When you have obtained your Swedish personal identification number it is your legal duty to report any changes tothe Swedish Tax Agency. Changes such as moving to a new address (within Sweden) needs to be notified within a week. Registering your new address is free of charge, and can easily be done on the website using the Tax Agency's e-services.
It is also your legal duty to inform the Swedish Tax Agency when leaving Sweden/moving abroad again, in order to be de-registered from the population register. This is called civil de-registration. To do this, download the form Notification Moving abroad SKV 7665 from the Swedish Tax Agency’s webpage.
When you have obtained your personal identification number it is your duty to inform KTH about this. Please send an email to
to make sure your temporary registration number is updated in the KTH database of student records (Ladok).
In the e-mail state:
Current temporary student registration number listed in Ladok (see above)
Your new 10-digit Swedish personal identification number