Recent global financial crisis motivates financial market regulators to rethink the credit policy management. In fact, it was just a huge credit boom which has started the last financial crisis. Paper investigates the long-run and short-run causal relationship between the corporate default probability and macroeconomic factors in the Czech Republic through the default rate and macroeconomic indicators. This approach requires the construction of a macroeconomic credit model, providing a framework for assessing causal relationships between variables used in order to capture the relationship between the default probability of the corporate sector and macroeconomic variables.