This study aims to test the influence of corporate governance, family ownership, institutional ownership, and tax avoidance on cost of debt. This study uses secondary data derived from annual reports and financial companies listed in Indonesia stock Exchange as a Participant Corporate Governance Perception Index during the period 2010-2013. The research used the method purposive sampling and using the tool of multiple linier regression. Before regression testing, data first tested with classical assumptions. The result of this study show that corporate governance has no significant influence on the cost of debt. Family ownership has a positive influence significantly to the cost of debt. Institutional ownership has no significant influence on the cost of debt. Tax avoidance has no significant influeance on the cost of debt.