HPTP cooperates with artbutler, the leading software solution for the art market. Galleries, artists and collectors use artbutler to manage all art-related workflows. Together, we develop solutions for optimised and time-saving data transfer between software users and their tax consulting firm.

Since 2013, we have been association partner to the Bundesverband Deutscher Stiftungen (Federal Association of German Foundations). That enhances our expertise centre Foundations & Non-profit via in-depth discussions with the right contacts.

Of course, we are also members in the standard professional associations for tax consultants: the Berlin Chamber of Tax Consultants, the German Federal Chamber of Tax Consultants and the Association of Tax Consultants of Berlin and Brandenburg. Since 2016 we are also part of WIRAS Verbund International.

Further partners of HPTP: