Governments need money for good functioning. Following the COVID – 19 pandemic and the energy crisis, finding sources to cover the budget deficits has become a real challenge. One of the ways of accumulating funds is by issuing government securities through auctions. Thus, countries are continuously concerned about developing the domestic debt market to decrease the dependence on external creditors. The primary dealer system is the most widespread form of cooperation between the issuer and investors. The main goal of the research is to show the influence of the primary dealer system on the development of the government securities market. In order to meet the requirements of the debt manager’s office they have to fulfil certain obligations. Despite the quantitative obligations of the primary dealers, the analysis focuses also on their qualitative aspects. Also, the paper presents a practical experience for selected countries regarding the evaluation of the activity of the primary dealers. The results of this research show a dependence between the development of the domestic government securities market and the methodology for evaluating the activity of the primary dealers.