International Business School (Hungarian: IBS Nemzetközi Üzleti Főiskola) is an accredited private college in Budapest, Hungary.

It was founded in 1991, by Prof. István Tamás.

[1] International Business School Budapest (Hungary) offers degree programmes in partnership with The University of Buckingham (UK) in Budapest and Vienna campuses.

[2] It was accredited in Hungary, the UK, the EU, and the United States.

The graduates of this university receive diploma of the University of Buckingham.