International Relations and Organisations (BSc)
Application deadline
Because admission to the BSc Political Science: International Relations and Organisations involves a selection and placement procedure, you need to take into account that the application deadline is both early and very strict. And after applying, there are some more deadlines that you will need to take into account.

Applications for 2026-2027 open in October 2025
Sorry, applications for the coming academic year (starting in September 2025) are closed and the selection and placement procedure for 2025-2026 is underway.
As of 1 October 2025 you can register for 2026-2027.
Apply between 1 October 2025 and 15 January 2026
Applications for BSc Political Science: International Relations and Organisations (2026-2027 academic year) open on 1 October 2025 and close on 15 January 2026 (23:59 CET). Applying outside of this time frame is not possible.
Application, selection and placement: overview of deadlines
1 October 2025 | Applications open for 2026-2027 academic year |
15 December 2025 | Recommended application deadline |
15 January 2026 | Application deadline |
31 January 2026 | Application in uSis finalised: required documents, grade average and (if applicable) admission request |
19-20 February 2026 | Online assessment |
15 April 2026 | Receipt of ranking number in Studielink |
15 April-31 August 2026 | Accept place in Studielink and finalise application |
Apply early!
If you don’t have a Dutch diploma that grants direct admission, you’ll have to complete a two-part application procedure:
- First register your application(s) in the national system Studielink.
- A day later you will receive log-in details for Leiden University’s application system (uSis), where you can complete your application.
You must submit your application via Leiden University’s application system (uSis), before the deadlines mentioned above. So don’t delay; if you haven’t registered in Studielink and activated your uSis account in time to apply by the deadline, you’ll miss out!
Other deadlines
Leiden University reserves a limited number of rooms each year for international students. However, as the number of housing requests always greatly exceeds the number of rooms available, we strongly recommend that you also look into other housing options at the same time. Read more about how and when to arrange housing. If you want to request accommodation via Leiden University, submit both your application for admission and your housing request well before the deadlines! Accommodation is offered on a first-come first-served basis and is not guaranteed. You don’t have to await admission before requesting housing.
If you want to apply for a scholarship, grant or loan, please bear in mind that different deadlines apply, and these deadlines can often be earlier. Deadlines vary per scholarship. Visit the scholarship website for more details.
If you (think) you need a visa or residence permit for your stay in the Netherlands, please make sure to check the requirements, procedures and deadlines!
Should you want to participate in the special colloquium doctum admission procedure, you need to take into account an even earlier deadline: 1 November 2025.
Please note: the early application deadline (15 January) and the provisions about selection and placement apply to the International Relations and Organisations specialisation.
The specialisation Nationale en Internationale Politiek has a later application deadline and no numerus fixus.