The Ministry of Finance of Belgium announced on 18 September 2013 that the protocol to the agreement for the avoidance of double taxation between Belgium and San Marino entered into force on 18 July 2013. The protocol was signed on 14 July 2009.

According to the protocol the exchange of banking information between Belgium and San Marino will be in accordance with the OECD model tax convention.

In Belgium, the protocol will apply from 1 January 2014 and for the income of periods beginning on or after 1 January 2014.