| Contracting Party | Treaty | Signature | Instrument | In Force | Details |
|---|
| Bulgaria | Beijing Treaty on Audiovisual Performances | December 19, 2012 | | | |
| European Union (EU) | Beijing Treaty on Audiovisual Performances | June 19, 2013 | | | |
| Bulgaria | Berne Convention | | Accession: December 5, 1921 | December 5, 1921 | Details |
| Cook Islands | Berne Convention | | Accession: May 3, 2017 | August 3, 2017 | Details |
| Bulgaria | Budapest Treaty | April 28, 1977 | Ratification: July 19, 1978 | August 19, 1980 | Details |
| African Intellectual Property Organization (OAPI) | Hague Agreement | | Accession: June 16, 2008 | September 16, 2008 | Details |
| Bulgaria | Hague Agreement | | Accession: November 11, 1996 | December 11, 1996 | Details |
| European Union (EU) | Hague Agreement | | Accession: September 24, 2007 | January 1, 2008 | Details |
| Bulgaria | Lisbon Agreement | | Accession: April 29, 1975 | August 12, 1975 | Details |
| Bulgaria | Locarno Agreement | | Accession: November 27, 2000 | February 27, 2001 | |
| Bulgaria | Madrid Agreement (Indications of Source) | | Accession: April 29, 1975 | August 12, 1975 | Details |
| Bulgaria | Madrid Agreement (Marks) | | Accession: April 25, 1985 | August 1, 1985 | Details |
| African Intellectual Property Organization (OAPI) | Madrid Protocol | | Accession: December 5, 2014 | March 5, 2015 | Details |
| Bulgaria | Madrid Protocol | | Accession: July 2, 2001 | October 2, 2001 | Details |
| European Union (EU) | Madrid Protocol | | Accession: July 1, 2004 | October 1, 2004 | Details |
| European Union (EU) | Marrakesh VIP Treaty | April 30, 2014 | | | |
| Bulgaria | Nairobi Treaty | | Accession: April 6, 1984 | May 6, 1984 | Details |
| Bulgaria | Nice Agreement | | Accession: November 27, 2000 | February 27, 2001 | Details |
| Bulgaria | Paris Convention | | Accession: April 30, 1921 | June 13, 1921 | Details |
| Bulgaria | Patent Cooperation Treaty | | Accession: February 21, 1984 | May 21, 1984 | Details |
| European Patent Organisation (EPO) | Patent Law Treaty | May 17, 2001 | | | |
| Bulgaria | Phonograms Convention | | Accession: May 31, 1995 | September 6, 1995 | |
| Bulgaria | Rome Convention | | Accession: May 31, 1995 | August 31, 1995 | Details |
| African Intellectual Property Organization (OAPI) | Singapore Treaty | | Accession: November 13, 2015 | February 13, 2016 | Details |
| Benelux Organization for Intellectual Property (BOIP) | Singapore Treaty | | Accession: October 8, 2013 | January 8, 2014 | |
| Bulgaria | Singapore Treaty | | Accession: January 21, 2008 | March 16, 2009 | Details |
| Bulgaria | Strasbourg Agreement | | Accession: November 27, 2000 | November 27, 2001 | |
| European Union (EU) | Trademark Law Treaty | June 30, 1995 | | | Details |
| African Intellectual Property Organization (OAPI) | UPOV Convention | | Accession: June 10, 2014 | July 10, 2014 | Details |
| Bulgaria | UPOV Convention | | Accession: March 24, 1998 | April 24, 1998 | Details |
| European Union (EU) | UPOV Convention | | Accession: June 29, 2005 | July 29, 2005 | Details |
| Bulgaria | Vienna Agreement | | Accession: November 27, 2000 | February 27, 2001 | |
| Bulgaria | WIPO Convention | January 11, 1968 | Ratification: February 19, 1970 | May 19, 1970 | Details |
| Cook Islands | WIPO Convention | | Accession: July 27, 2016 | October 27, 2016 | |
| Bulgaria | WIPO Copyright Treaty | | Accession: March 29, 2001 | March 6, 2002 | |
| European Union (EU) | WIPO Copyright Treaty | December 20, 1996 | Ratification: December 14, 2009 | March 14, 2010 | Details |
| Bulgaria | WIPO Performances and Phonograms Treaty | | Accession: March 29, 2001 | May 20, 2002 | |
| European Union (EU) | WIPO Performances and Phonograms Treaty | December 20, 1996 | Ratification: December 14, 2009 | March 14, 2010 | Details |
